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74
U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY SCHLUMBERGER SOUNDINGS IN THE DILLON RESOURCE AREA BEAVERHEAD AND MADISON COUNTIES, MONTANA By Robert J.Bisdorf1 Richard A. Wise 1 Open-File Report 98-149 1998 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards. Any use of trade, product, or firm names is for descriptive purposes only and does not constitute endorsement by the U.S. Government. 'Denver Federal Center, M.S. 964, Box 25046 Denver, CO 80225.

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Page 1: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY

SCHLUMBERGER SOUNDINGS IN THE DILLON RESOURCE AREA BEAVERHEAD AND MADISON COUNTIES, MONTANA

By

Robert J.Bisdorf1

Richard A. Wise1

Open-File Report 98-149

1998

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards. Any use of trade, product, or firm names is for descriptive purposes only and does not constitute endorsement by the U.S.

Government.

'Denver Federal Center, M.S. 964, Box 25046 Denver, CO 80225.

Page 2: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

Schlumberger Soundings in the Dillon Resource Area Beaverhead and Madison Counties, Montana

ByRobert J. Bisdorf Richard A. Wise

In 1996 and 1997 the U.S. Geological Survey made 60 dc electrical soundings using the Schlumberger array in the Dillon resource area, Beaverhead and Madison counties, Montana. The soundings were made to determine the thickness and the extent of the near-surface sands and gravels of placer deposits for the Bureau of Land Management. Results would assist in determining the potential for mining operations, and the location of the placer deposits.

Schlumberger sounding is a geophysical technique that uses variations in the electrical resistivity of earth materials to help detect buried geologic structures. DC resistivity (the inverse of conductivity) is a fundamental rock property that varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within a given rock type, the resistivity of the rock is primarily dependant on the quality and quantity of water and the amount of clay present. Generally speaking, higher clay content and/or poorer quality (higher TDS and/or chlorides) ground water lowers the rock resistivity.

Schlumberger sounding uses a symmetric electrode array to vertically explore the subsurface. The name Schlumberger derives from Conrad Schlumberger, an early proponent of the array geometry. Schlumberger soundings are processed by computer modeling of the sounding data as a series of horizontal layers (Zohdy, 1989 and Zohdy and Bisdorf, 1989). More detailed explanations of processing and automatic interpretation procedure can be found in Bisdorf (1985) and Zohdy and others (1993). A series of individual sounding interpretations can be combined to generate a geoelectrical cross section of interpreted resistivity. Cross sections, which can be thought of as vertical slices through the ground, similar to a road cut, are easier to interpret than individual soundings and show lateral as well as vertical variations of resistivity.

Page 3: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

MONTANA

China Town

Figure 1. Map of Montana showing general areas of data collection.

Table 1 gives the sounding number, x coordinate, y coordinate, and elevation of the soundings. The x and y coordinates are in kilometers UTM zone 12 using the North America horizontal datum of 1927. The elevations are in meters using the North American vertical datum of 1929. Figure 1 is a map covering the areas worked.

The data were interpreted using an automatic computerized interpretation program (Zohdy and Bisdorf, 1989) written for IBM PC's and compatible computers. The soundings are designated Dillon 1 through Dillon 60. Sounding Dillon 54 has an S appended to the title of the interpreted sounding, indicating that the field sounding was smoothed prior to interpretation. Sounding Dillon 59 was distorted by a metal fence and is included only for completeness. For each sounding curve, the data in the appendix includes:

1. A sounding title designated by the name of the survey area followed by the sounding number.

2. A tabulation of the AB/2 electrode spacings (in meters and feet) and corresponding apparent resistivities (in ohm-meters).

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3. A log-log plot of the field data points. Each set of data points that were made with the same potential electrode spacing (MN) are connected with a solid line. Measurements were made at MN/2 spacings of .6, 2., 20., and 60., feet as appropriate.

4. A tabulation of the automatically interpreted layering, with depths in meters and feet and the corresponding resistivities in ohm-meters.

5. A log-log plot of the results of the automatic interpretation program. The circles represent the shifted-digitized field data, the continuous curve represents the sounding curve calculated from the interpreted layering, and the step-function curve represents the interpreted layering.

RESISTIVITY CROSS SECTIONS

Resistivity cross sections are generated from individual sounding interpretations. Each sounding interpretation is sampled in a manner to approximate a continuous vertical distribution of resistivity with depth (Bisdorf, 1982). This vertical data is then horizontally interpolated to create a grid. Gray scale or color values are assigned based on the interpolated resistivity values and the desired contour levels. Triangles on the upper surface of the cross section designate the sounding locations. Topographic information, input as sounding elevations, is represented by connecting the surface location of the soundings by straight lines. The bottom edge of the cross sections will be variable and the elevation of the bottom is determined by the depth of useable data as determined by a percentage of the deepest interpreted layer depth. The variable bottom of the cross sections is used to discourage making interpretations not justified by the data.

Figure 2 shows the location map for the Virginia City area. Soundings were made in Alder Gulch and Browns Gulch. Figure 3 shows a geoelectrical cross section made from the interpretation of the soundings made in Alder Gulch. The green and yellow colors under soundings 38, 39, and 40 indicate resistivities from 10 to 100 ohm-m and are typical for unconsolidated sediments in an alluvial environment. The higher resistivities seen under the soundings in the gulch represent either gravels or the gneissic bedrock (Van Gosen and others, 1998). The high resistivity (150 to 300 ohm-m) tongue under soundings 37 and 38 could represent gravels with the potential for mining impact. Similarly the near surface

Page 5: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

(upper 20 meters) high resistivity zone throughout the canyon could indicate gravels, although we would be surprised to find 25 meters of gravel as far up the canyon as soundings 33 and 34.

Figure 4 shows a geoelectrical cross section made from the interpretation of the soundings in Browns Gulch. The green and yellow colors under soundings 41, and 46 indicate resistivities from 10 to 100 ohm-m and are typical for unconsolidated sediments in an alluvial environment. The higher resistivities seen under the soundings in the gulch represent either gravels or gneissic bedrock. The near surface (upper 20 meters) high resistivity material seen under soundings 45, 42 and 46 could possibly represent mineable gravels up to 30 meters thick. There is placer activity between sounding 46 and sounding 41. In general the rocks in this gulch are not as resistive as those in Alder Gulch, possibly indicating that these rocks are somewhat less competent.

Figure 5 shows a location map for the Dyce Creek area. Figures 6 and 7 show the geoelectrical cross sections made from the interpretation of the soundings in the east fork and west fork of Dyce Creek respectively. Generally speaking, high resistivities dominate the cross section indicating that the creek is very close to the Hornblende gabbro that is the predominate basement rock (Pearson and Zen, 1985). If any placer gravels exist their presence is masked by the high resistivity basement materials. On figure 6 under sounding 20, the resistivities are somewhat lower than the rest of the cross section. This probably represents a unit described by Pearson and Zen (1985) as conglomerate, tuffaceous sandstone and tuff. On figure 7 under soundings 14 and 21 a lower resistivity layer may indicate the same unit. Out of the canyon (soundings 47 and 48) the resistivity structure is representative of unconsolidated fine grained material. The upper 1 to 5 meters is high resistivity material and could represent gravels.

Figure 8 shows a location map for the Grasshopper Creek area. Figure 9 shows a geoelectrical cross section made from the interpretation of the soundings made in this area. The greater than 100 ohm-m material under soundings 28 and 60 probably represent the basalt that outcrops on the nearby hills along the canyon of the Beaverhead River. In the canyon of Grasshopper Creek the near surface greater than 100 ohm-m material may represent gravels. Near surface gravels are indicated from sounding 30 to sounding 23. The proposed gravels are less than 10 meters thick under sounding 30 to greater than 50 meters thick under sounding 22. This deposit is laid down in a westerly dipping wedge of material. Beneath the proposed gravels is a less than 20 ohm-m layer that may represent some finer grained material. Some possibilities include siltstone, tuff, or any porous media

Page 6: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

saturated with poor quality water. Greater than 100 ohm-m material exists under soundings 25, 26, and 27. This zone ranges in thickness from less than 10 meters to greater than 60 meters and is dipping to the east. This zone could represent gravels. The dips seen west of sounding 30 are consistent with information given verbally by R.C. Pearson on the results of his preliminary geologic mapping of the area that indicates a synclinal structure in this area.

Figure 10 shows a location map for the China Town area. Figure 11 shows a geoelectrical cross section made from the interpretation of the soundings made in this area. The greater than 150 ohm-m material present under soundings 1 and 2 represent the basement rocks. The greater than 70 ohm-m material in the upper 50 meters is presumed to represent gravel deposits. The placer gravels in the China Town area were actively worked and piles of material can still be seen. This made access to the center of Jeff Davis Creek difficult and as a consequence many of the soundings were located on the sides of the valley. This is not ideal for determining the presence and thickness of gravels. The greater than 70 ohm-m material present in the upper 50 meters of the cross section is presumed to represent the gravels. The cross section indicates a low resistivity structure under sounding 55 that divides the valley. Gravels thicken to the east and west from this divide. This low resistivity body is probably a clay rich rock such as a siltstone, mudstone, or tuff. A less likely possibility for the composition of this low resistivity material is rhyolite (in a previous survey (Zohdy and Bisdorf, 1994 p 23-24) measurements were made on a competent gray rhyolite that had similarly low resistivities (i.e. <15 ohm-m)), although it was questioned whether the sounding in question was actually measuring the resistivity of the rhyolite. M'Gonigle and Mortimer (1997) show an anticline with both flanks faulted just north of this low resistivity zone. Extending the mapped faults and anticlinal crest south to Jeff Davis Creek matches the low resistivity zone. It isn't known if this low resistivity divide is related to the source of gold in Jeff Davis Creek.

The transition from high resistivities to low resistivities between soundings 1 and 2 represents the Maiden Peak fault designated MP on M'Gonigle and Mortimer (1997). The transition from moderate resistivities to low resistivity near sounding 56 represents the Horse Prairie Basin fault designated as HPB on M'Gonigle and Mortimer (1997). The cross section has faults represented as dipping lines. The fault dips are determined by those that are visually pleasing since the soundings are not typically closely enough spaced to determine dip.

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REFERENCES

Bisdorf, R.J., 1982, Schlumberger sounding investigations in the Date CreekBasin, Arizona: U.S. Geological Survey Open-File Report 82-953, 55 p.

_, 1985, Electrical techniques for engineering applications: Bulletin of theAssociation of Engineering Geologists, v. XXII, no. 4, p. 421-433.

M'Gonigle, J.W., and Mortimer, H.H. Jr., 1997, Geologic map of the Jeff DavisPeak quadrangle and the eastern part of the Everson Creek quadrangle,Beaverhead County, southwest Montana: Geologic Investigations map I-2604.

Pearson, R.C., and Zen, E-An, 1985, Geologic map of the Eastern PioneerMountains, Beaverhead County, Montana: U.S. Geological SurveyMiscellaneous Field Studies Map MF-1806-A.

Van Gosen, B.S., Hammarstrom, J.M., Kellogg, K.S., and Berg, R.B., 1998, Mapshowing areas with potential for garnet resources in bedrock and placer inthe Blacktail Mountains and the Gravelly, Greenhorn, Ruby, and SnowcrestRanges of southwest Montana: U.S. Geological Survey Open-File Report(in press), Iplate.

Zohdy, A.A.R., and Bisdorf, RJ.,1989, Programs for the automatic processing andinterpretation of Schlumberger sounding curves in QuickBASIC 4.0: U.S.Geological Survey Open-File Report, 89-137 A&B, 64 p. + diskette.

__, 1994, A direct current resistivity survey near the marine corps logistics basesat Nebo and Yermo, Barstow, California: U.S. Geological Survey Open-FileReport 94-202, 155 p.

Page 8: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

Sounding number

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

X (km)

329.37

328.54

325.74

326.46

327.69

327.81

325.26

324.23

339.71

339.77

339.63

339.16

339.45

339.57

340.61

340.93

340.95

340.84

340.76

340.81

340.18

356.62

355.81

354.88

354.00

353.21

352.27

360.74

359.10

358.87

Y (km)

4972.07

4972.06

4972.82

4972.13

4972.28

4972.09

4973.21

4973.45

5020.21

5019.72

5018.98

5018.38

5017.66

5017.08

5015.72

5016.40

5016.93

5017.66

5018.43

5019.06

5016.40

4996.86

4996.64

4996.56

4996.45

4996.83

4996.77

4996.72

4996.19

4996.39

Elevation (meters)

2371.7

2257.0

2118.4

2141.2

2188.5

2203.7

2100.0

2078.7

2329.3

2240.8

2190.5

2140.2

2097.6

2064.0

1971.0

1998.6

2024.4

2067.1

2129.6

2176.8

2012.2

1667.3

1652.4

1667.7

1667.7

1679.9

1652.4

1623.5

1631.1

1626.5

Sounding number

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

X (km)

357.87

427.07

427.39

427.80

427.86

426.87

426.64

426.42

425.98

425.29

423.46

423.28

423.51

423.15

423.15

423.34

340.59

340.52

322.98

321.86

327.26

326.89

327.58

326.99

326.23

323.83

358.29

359.40

360.13

359.95

Y (km)

4996.77

5008.05

5008.54

5009.94

5011.61

5012.68

5013.40

5014.49

5015.41

5016.20

5017.03

5015.27

5012.62

5013.42

5014.25

5016.36

5014.92

5013.34

4973.78

4973.97

4972.32

4972.27

4971.65

4971.93

4972.51

4973.51

4996.70

4995.92

4995.79

4995.59

Elevation (meters)

1631.1

2118.9

2109.7

1997.0

1896.3

1852.1

1823.2

1780.5

1768.3

1740.8

1725.6

1774.7

1884.1

1850.6

1817.1

1773.9

1946.6

1905.5

2061.0

2007.6

2167.1

2168.7

2206.8

2164.1

2142.7

2050.4

1639.8

1630.7

1615.4

1618.5

Table 1. Schlumberger sounding coordinates. Horizontal coordinates (x and y) are in kilometers UTM zone 12 using the North American horizontal datum of 1927. Elevations are in meters using the North American vertical datum of 1929.

Page 9: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

32 Schlumberger Sounding 0 Location and Number

Contour interval 50 meters

Figure 2. Map showing Schlumberger sounding locations near Virginia City, Montana.

Page 10: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

32 Schlumberger Sounding 0 Location and Number

Contour Interval 50 meters

Figure 5. Map showing the Schlumberger sounding locations in the Dyce Creek Area, west of Dillon, Montana.

Page 11: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

Vertical Exaggeration KlO

3km

Interpreted Resistivity in Ohm-m

Figure 3. Geoelectrical cross section of the Schlumberger soundings along Alder Gulch near Virginia City, Montana.

South 43 44

O* I.

1QO

45I

42-J-

North 46 41

__I____

Vertical Exaggeration xlO

Interpreted Resistivity in Ohm m

Figure 4. Geoelectrical cross section of the Schlumberger soundings made along Browns Gulch near Virginia City, Montana.

C 10Q

+J

I

3km »-i i latsa i i i i i i i i naInterpreted Resistivity in Ohm xn

Figure 6. Geoelectrical cross section of the Schlumbergersoundings along the east fork of Dyce Creek, Montana.

Inferred fault 15 21

North 1Q 9

Interpreted Resistivity in Ohm

Figure 7. Geoelectrical cross section of the Schlumberger soundings along the west fork of Dyce Creek, Montana.

10

Page 12: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

32 Schlumberger Sounding 0 Location and Number

Contour Interval 50 meters

Figure 8. Map showing the location of the Schlumberger soundings made along Grasshopper Creek, Montana.

11

Page 13: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

32 Schlumberger Sounding Location and Number

Contour interval 40 meters

Figure 10. Map showing the location of the Schlumberger soundings made along Jeff Davis Creek, Montana.

12

Page 14: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

g 100

Vertical Exaggeration xlO

012 3km

Interpreted Resistivity in Ohm m

Figure 9. Geoelectrical cross section of the Schlumberger soundings made along Grasshopper Creek, Montana.

Vertical Exaggeration aclO

012 3km

Interpreted Resistivity in Ohm m

Figure 11. Geoelectrical cross section from the interpretation of Schlumberger soundings made along Jeff Davis Creek, Montana.

APPENDIX

13

Page 15: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

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Page 16: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

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Page 17: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

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0.61

0.90

1.32

1.93

2.84

4.16

6.11

2.01

2.94

4.32

6.34

9.31

13.66

20.05

RESI

S.

576.14

825.86

937.08

782.26

501.

23272.76

137.10

DEPT

H, m

(

8.97

13.17

19.33

28.3

741

.64

61.1

289.71

9999

9.00

ft

)

29.4

343.20

63.4

193

.07

136.

6120

0.52

294.

3299999.00

RESI

S.

76.56

64.54

61.27

48.5

637.05

29.6

724

.42

21.9

8

Page 18: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e-o FI

ELD

CURV

E

ID

LLJ o:

DILLON 4

o o o DI

GITI

ZED

CALCULATED

DIL

LON

4

1 10

10

0

ELEC

TRO

DE

SP

AC

ING

CA

B/2

) IN

MET

ERS

en

LU

a:

1000

1 10

10

0 10

00

ELEC

TRO

DE

SPAC

ING

C

AB

/2)

OR

DEP

TH

IN

MET

ERS

AB/2

, m

( ft

) App. Re

s.AB

/2,

m

( ft

)

App.

Res.

DEPTH, m

( ft

RESIS.

DEPTH, m

( ft

0.9

1.2

21.8

32

.44

3.0

54.2

73

.05

4.2

76.1

09.1

4

3.0

04

.00

6.0

08

.00

10.0

014.0

010.0

014.0

020.0

030.0

0

66.0

06

4.0

07

8.0

084.0

086.0

09

9.0

09

3.5

01

05

.00

92.0

080.0

0

12.1

918.2

92

4.3

830.4

830.4

842.6

760.9

691.4

41

21

.92

182.8

8243.8

4

40.00)

60.00

80.00

100.00

100.00

140.00

200.00

300.00

400.00

600.00

800.00

63.00

35.00

20.40

13.50

13.00 00 00 80 00 80

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.29

18.05

53.82

77.06

105.36

129.41

134.36

114.12

77.79

8.07

11.85

17.39

25.53

37.47

55.01

80.74

99999.00

26.49

38.88

57.07

83.76

122.95

180.47

264.89

99999.00

RESIS.

40.34

17.46

10.24

6.80

4.35

5.24

7.31

7.71

7.00

Page 19: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

go-e

-o F

IELD

CU

RVE

DIL

LON

5

2

o in

LLJ

DC

go

o

o D

IGIT

IZE

Ds

CALCULATED

DIL

LON

5

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETER

S1000

1 10

100

1000

ELECTRODE

SPACING

CAB/

2) OR D

EPTH IN

METERS

AB/2

, m

( ft

) Ap

p. Res.

AB/2,

m

( ft

) Ap

p. Res.

DEPT

H, m

( ft

RESIS.

DEPT

H, m

( ft

)

0.91

1.22

1.83

2.44

3.05

4.27

3.05

4.27

6.10

9.14

3.00

4.00

6.00

8.00

10.00

14.0

010.0

014.00

20.00

30.00

2900.00

2000.00

1500.00

1275.00

1180.00

1045.00

1000.00

885.00

730.

0041

0.00

12.

18.

24.

30.

42.

30.

42.

60.

91.

121.

182.

40.00

60.00

80.0

0100.00

140.

00100.00

140.00

200.

0030

0.00

400.

00600.00

210.00

78.00

42.00

29.00

17.50

39.00

23.00

15.60

15.30

15.00

16.10

0.67

0.99

1.45

2.13

3.12

4.58

6.73

2.21

3.24

4.76

6.98

10.25

15.0

422.07

2743.06

1360.17

991.

561295.28

1560.53

917.

2523

2.23

9.88

14.5

021.28

31.23

45.84

67.2

899

999.

00

32.40

47.5

669.80

102.46

150.

3922

0.74

9999

9.00

RESI

S.

54.5

952.32

35.62

12.92

10.86

13.19

16.87

Page 20: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

§&-&-Q FIELD CURVE

DILL

ON 6

o o DI

GITI

ZED

CALCULATED

DIL

LON

6

CD

LL

Jo

:

1010

010

00EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETER

S1

10

100

1000

EL

ECTR

OD

E SP

ACIN

G

CA

B/2

) O

R D

EPTH

IN

M

ETER

S

AB/2,

m

( ft

) Ap

p. Re

s.AB

/2,

m

( ft

) Ap

p. Res.

DEPTH, m

( ft

)

0.91

1. 1. 2. 3.

3.

.22

,83

.44

.05

.05

4.27

6.10

9.14

12.1

9

3.00

4.00

6.00

8.00

10.00

10.00

14.00

20.00

30.00

40.00

1270

.00

1135

.00

910.00

860.00

800.00

820.

00750.00

645.00

415.00

242.00

18.29

24.38

30.48

30.48

42.67

60.96

91.4

4121.92

182.88

243.84

60.0

080.00

100.

00100.00

140.00

200.

0030

0.00

400.

00600.00

800.

00

87.00

40.00

34.00

35.00

33.00

30.50

29.00

31.00

36.00

51.00

0.61

0.90

1.32

1.93

2.84

4.16

6.11

2.01

2.94

4.32

6.34

9.31

13.66

20.05

RESIS.

DEPTH, m

( ft

) RESIS.

1523.79

8.97

29.43

67.7

182

7.31

13

.17

43.20

12.9

9659.82

19.33

63.4

1 25

.43

800.

11

28.3

7 93.07

45.7

9991.73

41.6

4 13

6.61

30

.15

831.

11

61.12

200.52

17.1

8353.95

89.7

1 29

4.32

24.33

999

99.0

0 99

999.

00

96.7

7

Page 21: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

sio-e

-o F

IELD

CU

RVE

in UJ cr

.110

DIL

LON

7

o o

o D

IGIT

IZED

100

in UJ cr

1000

CALCULATED

DILL

ON 7

ELEC

TROD

E SPACING

CAB/

2)

IN METERS

.1

1 10

100

1000

ELECTRODE

SPAC

ING

CAB/

2) OR

DEPTH IN

MET

ERS

AB

/2,

m

( ft

)

App

. R

es.

AB

/2,

m

( ft

)

App

. R

es.

DE

PT

H,

m

( ft

)

0.9

1

1. 1. 2. 3.

3. 4. 6..2

2.8

3.4

4.0

5.0

5.2

7.1

09

.14

12.1

9

3.0

04

.00

6.0

08.0

010.0

010.0

014.0

02

0.0

03

0.0

04

0.0

0

16

.00

16.8

01

6.7

01

7.8

01

7.0

01

7.3

018.8

022.0

029.0

034.0

0

18.2

924.3

83

0.4

83

0.4

842.6

760.9

691.4

41

21

.92

182.8

8243.8

4

60.0

08

0.0

0100.0

0100.0

01

40

.00

200.0

0300.0

0400.0

06

00

.00

800.0

0

37.5

040.5

03

9.0

041.0

039.5

02

8.5

019.8

016.0

016.0

017.5

0

0.5

00.7

31.0

71.5

72.3

03

.37

4.9

5

1.6

22

.38

3.5

05.1

47.5

411.0

716.2

4

RE

SIS

. D

EPT

H,

m

( ft

)

RE

SIS

.

17.6

9

7.2

7

23

.84

57.3

320.2

0

10.6

7

34

.99

7

2.0

11

7.1

8

15

.65

51.3

6

70

.34

13

.65

22.9

8

75

.39

44.6

91

6.1

5

33.7

3

110.6

5

17

.42

25.7

6

49.5

1

16

2.4

2

7.5

94

0.2

7

72.6

6

238.4

0

9.6

89

99

99

.00

99999.0

0

21.4

0

Page 22: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

&-&

-*>

FIE

LD

CURV

E

LJJ

cr

.110

DIL

LON

8

o

o

o D

IGIT

IZE

D

LU

DC

100

1000

CALCULATED

DILL

ON 8

ELECTRODE

SPACING

CAB/

2}

IN METERS

.1

1 10

100

1000

ELEC

TROD

E SPACING

CAB/

2} OR D

EPTH IN

MET

ERS

AB/2,

m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

) Ap

p. Res.

DEPT

H, m

( ft

)RESIS.

DEPTH, m

( ft

0.9

1 22

1.8

32

.44

3.

3..0

5.0

54.2

76.1

09.1

412.1

9

3.0

04.0

06.0

08.0

010.0

010.0

014.0

02

0.0

03

0.0

04

0.0

0

21

3.0

0235.0

0212.0

01

65

.00

10

6.0

01

10

.00

58.0

02

7.9

021.0

02

3.0

0

18.2

92

4.3

83

0.4

842.6

73

0.4

84

2.6

760.9

691.4

41

21

.92

18

2.8

8

60.0

080.0

0100.0

0140.0

0100.0

0140.0

02

00

.00

300.0

04

00

.00

600.0

0

25

.50

28

.00

27

.50

30.5

02

4.0

025.5

026.5

02

4.0

019.9

016.8

0

0.6

10

.89

1.3

01.9

12.8

14

.13

6.0

6

1.9

92.9

24

.28

6.2

89

.22

13.5

319.8

7

228.2

52

71

.64

19

2.8

764.3

113.6

59.7

115.8

7

8.8

913.0

519.1

528.1

141.2

560.5

599999.0

0

29.1

642.8

062.8

292.2

11

35

.35

19

8.6

699999.0

0

RE

SIS

.

20.6

024.6

031.0

637.0

933.3

021.1

012.0

1

Page 23: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

e-a

-e F

IELD

CU

RVE

1/3

LLJ

o:

DIL

LON

9

o o

o D

IGIT

IZE

D

LLJ a:

1 10

10

0 EL

ECTR

ODE

SP

ACIN

G C

AB

/2}

IN M

ETER

S1000

CALCULATED

DILL

ON 9

.1

1 10

100

1000

ELEC

TROD

E SP

ACIN

G CAB/2} OR D

EPTH IN

MET

ERS

AB/2,

m

( ft

) App. Res.

KB/2

, m

{ ft

) App. Re

s.DE

PTH,

m

{ ft

0.91

1.22

1.83

2.44

3.05

3.05

4.27

6.10

9.14

12.19

3.00

4.00

6.00

8.00

10.00

10.00

14.00

20.00

30.00

40.00

25.00

25.00

25.50

31.50

37.00

35.00

45.50

63.00

90.0

010

9.00

18.2

924.38

30.48

42.67

30.48

42.67

60.96

91.44

121.

92182.88

243.84

60.00

80.00

100.

0014

0.00

100.

0014

0.00

200.00

300.

00400.00

600.00

800.00

134.

0016

2.00

165.

0018

7.00

180.

00203.00

220.00

235.00

258.00

320.00

245.00

0.45

0.65

0.96

1.41

2.07

3.04

4.46

1.46

2.15

3.15

4.62

6.78

9.96

14.62)

RESI

S.

30.80

12.8

916

.53

34.39

74.97

145.

8124

3.50

DEPT

H, m

{ ft

)

6.54

9.60

14.0

920

.68

30.3

544.55

65.4

099999.00

21.4

631.49

46.23

67.85

99.59

146.

18214.56

99999.00

RESIS.

335.

9535

6.23

285.

2320

7.93

210.74

349.

7749

1.06

226.70

Page 24: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

§o-e

-G F

IELD

CU

RVE

in

LJJ

cr

.1

DIL

LON

10

oo

o D

IGIT

IZE

D

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2}

IN M

ETER

S

§

I? te CD

LL

J cr

1000

CALCULATED

DILL

ON 10

.1

1 10

10

0 10

00

ELEC

TROD

E SP

ACIN

G CAB/2) OR

DEPTH IN

MET

ERS

AB/2,

m

{ ft

) Ap

p. Re

s.KB/2,

m

{ ft

)

App.

Res.

DEPTH, m

{ ft

)

0.91

1. 1. 2. 3.

3,

.22

.83

.44

.05

.05

4.27

6.10

9.14

12.1

9

3.00

4.00

6.00

8.00

10.00

10.00

14.00

20.00

30.00

40.00

260.00

240.00

200.00

200.00

199.

0019

5.00

190.00

170.

0017

5.00

166.

00

18.2

924.38

30.48

30.48

42.6

760.96

91.44

121.92

182.88

243.84

60.00

80.00

100.

00100.00

140.00

200.

0030

0.00

400.

0060

0.00

800.

00

170.

0017

5.00

180.

0020

5.00

195.

0019

5.00

210.50

225.

00240.00

242.00

0.50

0.73 .07

.57

.30

1. 1. 2. 3.37

4.95

1.62

2.38

3.50

5.14

7.54

11.07

16.2

4

RESIS.

DEPTH, m

{

299.32

241.42

219.

2620

9.01

197.

4318

8.50

186.54

ft

7.27

10

.67

15.65

22.98

33.73

49.51

72.6

6 99

999.

00

23.8

4 34

.99

51.3

6 75

.39

110.65

162.

42

238.

40

9999

9.00

RESI

S.

190.87

193.37

188.79

187.

08199.09

221.

40242.35

255.43

Page 25: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

§o-B

-e F

IELD

CU

RVE

C/3

UJ

CC

.110

DIL

LON

11

§o

o

o

DIG

ITIZ

ED

C/3

UJ

CC

100

1000

CALCULATED

DILL

ON 1

1

ELEC

TROD

E SP

ACIN

G CAB/2}

IN METERS

.1

1 10

100

1000

EL

ECTROD

E SP

ACIN

G CAB/2} OR D

EPTH IN

MET

ERS

AB/2,

m

( ft

) App. Res.

AB/2,

m

( ft

) Ap

p. Re

s.DEPTH, m

( ft

)RESIS.

DEPTH, m

( ft

)

0.91

l!.2

2.8

32.44

3.05

3.05

4.27

6.10

9.14

12.1

9

3.00

4.00

6.00

8.00

10.0

010

.00

14.0

020.00

30.00

40.00

320.00

325.00

348.00

400.00

420.00

379.00

375.00

345.00

282.00

302.00

18.2

924.38

30.48

30.48

42.67

60.96

91.4

4121.92

182.88

243.

84

60.00

80.00

100.

00

100.

00

140.

00

200.00

300.00)

400.00)

600.

00

800.00)

318.00

363.00

410.00

420.00

523.00

640.

0060

2.00

460.00

220.00

141.

00

0.50

0.73

1.07

1.57

2.30

3.37

4.95

1.62

2.38

3.50

5.14

7.54

11.0

716

.24

250.78

326.

07

443.

34

503.

55

425.43

294.

10

218.

80

7.27

10

.67

15.6

5 22

.98

33.73

49.5

1 72

.66

9999

9.00

23.8

4 34.99

51.36

75.39

110.65

162.42

238.

40

9999

9.00

RESI

S.

220.72

315.

2454

7.56

900.89

1142.76

933.76

381.47

57.6

0

Page 26: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

Q-e

-o F

IELD

CU

RVE

in

LU

cr

.110

DIL

LON

12

o

o o

DIG

ITIZ

ED

LU cr

100

1000

CALCULATED

DILL

ON 12

t I i

ELECTRODE

SPACING

CAB/

2)

IN METERS

.1

1 10

100

1000

ELECTRODE

SPAC

ING

CAB/

2} OR D

EPTH IN M

ETERS

AB/2

, m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

) Ap

p. Re

s.DEPTH, m

( ft

) RESIS.

DEPTH, m

( ft

0.9

1.2

21

.83

2.4

43.

3..0

5.0

54

.27

6.1

09.1

412.1

9

3.0

0)

4.0

0)

6.0

0)

8.0

0)

10.0

0

10.0

0

14.0

0

20.0

0

30.0

0

40.0

0

475.00

360.00

290.00

255.00

235.00

255.00

278.00

310.00

360.00

375.00

18 24 30 30 42 60 91121

182

243

.29

,38

,48

.48

.67

.96

.44

.92

.88

.84

60.00

80.00

100.

0010

0.00

140.

00200.00

300.

00400.00

600.

00800.00

419.

0048

0.00

465.

0050

0.00

520.

0052

5.00

560.

0060

0.00

595.

0060

0.00

0.50

0.73

1.07

1.57

2.30

3.37

4.95

1.62

2.38

3.50

5.14

7.54

11.07

16.24

613.

82350.61

222.23

213.59

266.

6633

7.71

422.42

7.27

10.6

7 15.65

22.9

8 33

.73

49.5

1 72.66

99999.00

23.8

4 34

.99

51.3

6 75

.39

110.

65

162.

42

238.40

99999.00

RESI

S.

514.06

562.77

547.27

525.

7155

0.80

603.

82628.54

611.51

Page 27: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

Q-B-O FIELD

CURVE

in

LU DC

DILL

ON 1

3

1 10

10

0ELECTRODE

SPAC

ING

CAB/2)

IN MET

ERS

8o

oo

DIG

ITIZ

ED

ii; tn LU cr

1000

CAL

CU

LATE

DDILLON 1

3

.1

1 10

10

0 1000

ELEC

TROD

E SPACING

CAB/

2} OR D

EPTH IN

MET

ERS

KB/2,

m

( ft

0.91

1. 1. 2. 3. 4.27

3.

.22

.83

.44

.05

.05

4.27

6.10

9.14

3.00

4.00

6.00

8.00

10.0

014.00

10.00

14.00

20.00

30.00

App.

Re

s.

155.00

145.

0013

3.00

129.

0012

3.00

140.00

105.00

113.00

132.00

160.

00

AB/2,

m

( ft

) App. Re

s.DE

PTH,

m

( ft

)

12.

18.

24.

30.

30.

42.

60.

91.

121.

182.

243.

19 29 38 48 48 67 96 44 92 88 84

40.00

60.0

080.00

100.

0010

0.00

140.

00200.00

300.

00400.00

600.

0080

0.00

174.00

203.

0023

3.00

245.

0025

8.00

293.

00305.00

267.

00290.00

285.

00330.00

0.50

0.73

1.07 57 30 37

4.95

1 2 3 5 711 16.24

RESI

S.

DEPT

H, m

( ft

)

RESI

S.

148.

63

7.27

( 23

.84

227.

88109.82

10.6

7 (

34.99

307.23

83.23

15.65

( 51

.36

382.

2187.14

22.98

( 75.39

377.

61115.45

33.73

( 110.65

297.07

147.34

49.5

1 16

2.42

23

7.70

178.34

72.6

6 (

238.

40

256.96

999

99.0

0 (99999.00

361.39

Page 28: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

0-e

-e F

I ELD

CU

RVE

DIL

LON

14

o

o o

DIG

ITIZ

ED

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2}

IN M

ETER

S10

00

CALCULATED

DIL

LON

14

1 10

10

0 10

00

ELEC

TRO

DE

SPAC

ING

C

AB

/2}

OR

DEP

TH

IN

MET

ERS

KB/2,

m

( ft

) Ap

p. Res.

AB/2,

m

( ft

)

App.

Res.

DEPT

H, m

( ft

RESI

S.DE

PTH,

m

( ft

)

0.91

1.22

1.83

2.44 .05

.05

4.27

6.10

9.14

12.1

9

3.00

4.00

6.00

8.00

10.00

10.0

014

.00

20.00

30.00

40.00

235.

0019

0.00

124.00

100.

0090

.00

96.00

93.0

094.00

92.00

91.00

18.

24.

30.

42.

30.

42.

60.

91.

121.

182.

243.

60.0

080.00

100.00

140.00

100.

0014

0.00

200.00

300.

0040

0.00

600.

0080

0.00

92.00

95.00

100.00

118.00

115.00

130.

0013

7.00

160.

0019

0.00

235.00

275.00

0.50

0.73

1.07

4.95

1.62

2.38

3.50

5.14

7.54

11.07

16.24

390.42

163.

56

88.43

74.21

100.

91

121.12

105.83

7.27

10.6

7 15.65

22.9

8 33

.73

49.51

72.6

6 99

999.

00

23.84

34.99

51.36

75.3

9 110.65

162.42

238.

40

9999

9.00

RESI

S.

84.62

84.93

114.17

148.78

100.41

178.56

265.45

433.04

Page 29: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

FIE

LD

CURV

E

in LLJ

CC

.110

DIL

LON

15

o

o o

DIG

ITIZ

ED

100

LD

LU

CC

1000

CAL

CU

LATE

DDI

LLON

15

ELEC

TROD

E SP

ACIN

G CA

B/2}

IN

MET

ERS

.1

1 10

100

1000

ELECTRODE

SPAC

ING

CAB/

2} OR

DEPTH IN

MET

ERS

AB/2,

m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

)

App.

Re

s.DE

PTH,

m

( ft

)RESIS.

DEPTH, m

( ft

)

0.91

1. 1. 2. 3.

.22

.83

.44

.05

4.27

3.05

4.27

6.10

9.14

3.00)

4.00

6.00

8.00

10.00

14.00

10.00

14.00

20.00

30.00

355.00

380.00

406.00

403.00

430.00

510.00

395.00

440.00

450.00

475.00

12 18,

24 30 30,

42,

60,

91.

121.

182,

243.

19 29 38 48 48 67 96 44 92 88 84

40.00

60.0

080.00

100.00

100.00

140.00

200.

00300.00

400.

00600.00

800.00

490.

0047

5.00

425.

00395.00

390.

0038

0.00

340.

0027

2.00

280.00

305.

0029

0.00

0.50

0.73 07 57

2.30

3.37

4.95

1.62

2.38

3.50

5.14

7.54

11.0

716

.24

299.12

312.17

341.04

392.

43

457.

28

520.12

556.54

7.27

10

.67

15.6

5 22

.98

33.73

49.51

72.66

9999

9.00

23.84

34.99

51.3

6 75.39

110.

65

162.

42

238.40

99999.00

RESI

S.

540.86

482.

3140

9.07

332.63

277.

0226

4.55

277.

6928

9.97

Page 30: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

e-e-o

FI ELD C

URVE

J/_l_ ^3

l" en LU

OL.

.110

DILLON 16

§ooo DIGITIZ

ED

en LU

CC

100

1000

CALCULATED

DILL

ON 1

6

ELEC

TROD

E SP

ACIN

G CA

B/2)

IN MET

ERS

.1 1

10

100

1000

EL

ECTR

ODE

SPAC

ING

CAB/2) OR

DEP

TH IN M

ETERS

AB/2,

m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

) Ap

p. Res.

DEPT

H, m

( ft

)RESIS.

DEPTH, m

( ft

)

0.91

1.'

2. 3.

3.

.22

.83

.44

.05

.05

4.27

6.10

9.14

12.19

3.00

4.00

6.00

8.00

10.00

10.00

14.00

20.00

30.00

40.0

0

480.00

520.

0058

0.00

670.

0069

0.00

720.00

740.00

680.00

657.

00500.00

18.29

24.38

30.48

42.67

30.48

42.67

60.96

91.44

121.92

182.88

243.84

60.00

80.00

100.

00

140.

00

100.

00

140.

00

200.00

300.

00

400.

00

600.00)

800.

00

480.

0050

0.00

520.

0057

0.00

560.

0062

0.00

616.

00575.00

570.00

545.00

490.00

0.50

0.73

1.07

1.57

2.30

3.37

4.95

1.62

2.38

3.50

5.14

7.54

11.07

16.24

468.

85

654.

06

878.83

1063

.21

1107.43

881.

16

527.

47

7.27

10

.67

15.6

5 22.98

33.73

49.5

1 72.66

9999

9.00

23.8

4)

34.9

9]

51.36

75.3

9 11

0.65

16

2.42

238.40

99999.00

RESI

S.

364.

2642

3.85

588.03

698.

8170

9.18

653.35

552.

2644

1.81

Page 31: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

FIE

LD

CURV

E

in LLJ

GC

.110

DIL

LON

17

o

o D

IGIT

IZE

D

100

1000

CALC

ULAT

EDDI

LLON

17

ELEC

TROD

E SPACING

CAB/

2}

IN METERS

1 10

100

1000

ELECTRODE

SPAC

ING

CAB/

2) OR D

EPTH IN

MET

ERS

KB/2

, m

( ft

) Ap

p. Re

s.KB/2,

m

( ft

)

App.

Res.

DEPTH, m

( ft

)

RESIS.

DEPTH, m

( ft

)

0.91

.22

832.44

3.05

4.27

3.05

4.27

6.10

9.14

12.1

9

3.00

).00

6.00

8.00

10.0

014.00

10.00

14.00

20.00

30.00

40.00

425.00

340.00

280.00

208.00

171.

0019

5.00

202.00

210.00

290.00

420.00

510.00

18 24 30 42 30 42 60 9112

118

224

3

.29

.38

.48

.67

.48

.67

.96

.44

.92

.88

.84

60.00)

80.00

100.

00

140.00

100.00

140.00

200.

00

300.

00,

400.

00

600.

00

800.00)

665.00

780.

0081

5.00

920.

0076

0.00

870.

0088

5.00

920.

0090

0.00

830.00

730.

00

0.50

0.73

1.07 57

2.30

3.37

4.95

1.62

2.38

3.50

5.14

7.54

11.0

716.24

499.12

478.

96

167.

91

73.0

2 13

2.00

333.55

701.

66

7.27

10.6

7 15.65

22.98

33.73

49.51

72.6

6 99

999.

00

23.84

34.9

9 51

.36

75.39

110.65

162.42

238.

40

9999

9.00

RESI

S.

1173

.95

1525.16

1561.46

1359.88

1132.41

976.97

822.89

592.99

Page 32: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-o F

IELD

CU

RVE

in

ULJ

cc

.1

DIL

LON

18

o o

o D

IGIT

IZE

D

ULJ

CC

1 10

1Q

QEL

ECTR

ODE

SP

ACIN

G C

AB

/2)

IN M

ETER

S1Q

QQ

CALCULATED

DIL

LON

18

1 10

1Q

Q 1Q

QQEL

ECTR

ODE

SP

ACIN

G C

AB

/2)

OR D

EPTH

IN

MET

ERS

AB/2,

m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

) Ap

p. Res.

DEPT

H, m

( ft

)

0.91 22 83 44 05 05 27 10 14

12.19

3.00

4.00

6.00

8.00

10.00

10.00

14.0

020

.00

30.00

40.00

64.00

49.00

40.00

40.20

46.00

43.00

55.00

77.00

112.00

143.00

18.2

924.38

30.48

42.67

30.4

842.67

60.9

691.44

121.92

182.88

243.84

60.00

80.00

100.00

140.00

100.00

140.00

200.00

300.00

400.00

600.00)

800.00)

195.

00233.00

247.00

273.00

295.00

325.

0036

0.00

435.00

467.00

500.00

535.00

0.45

0.65

0.96

1.41

2.07

3.04

4.46

1.46

2.15

3.15

4.62

6.78

9.96

14.62

RESIS.

118.10

30.03

17.3

230.23

73.06

169.04

339.09

DEPT

H, m

( ft

6.54

9.

60

14.09

20.6

8 30

.35

44.5

5 65

.40

9999

9.00

21.46

31.4

9 46

.23

67.8

5 99

.59

146.18

214.

56

99999.00

RESIS.

552.04

688.34

662.14

548.

4146

4.06

449.

9149

9.29

596.

65

Page 33: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

e-e

-o F

IELD

CU

RVE

in UJ cr

.110

DIL

LON

19

oo

o D

IGIT

IZE

D

to UJ cr

100

1000

CALC

ULAT

EDDILLON 19

ELEC

TROD

E SP

ACIN

G CA

B/2}

IN

METERS

.1

1 10

100

1000

ELECTRODE

SPAC

ING

CAB/2} OR D

EPTH IN

METERS

AB/2,

m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

) Ap

p. Re

s.DEPTH, m

( ft

)RESTS.

DEPTH, m

( ft

)

0.91

1. 1. 2. 3.

.22

.83

.44

, .05

4.27

6.10

9.14

12.1

918

.29

3.00

4.00

6.00

8.00

10.0

014

.00

20.00

30.0

040.00

60.00

1400.00

900.

0035

5.00

229.00

157.

0013

2.00

147.

00177.00

190.00

200.00

24.38

30.48

42.6

730.48

42.6

760

.96

91.44

121.92

182.88

243.

84

80.0

0100.00

140.00

100.00

140.00

200.

00300.00

400.

00600.00

800.00

223.00

252.00

300.

00270.00

330.

0030

0.00

323.

00275.00

180.

0016

0.00

0.50

0.73 .07

.57

.30

1. 1. 2. 3.37

4.95

1.62

2.38 .50

5.14

7.54

11.0

716.24

2396

.10

676.77

164.04

95.10

123.

45158.48

181.08

7.27

10.6

715.65

22.9

833

.73

49.5

172.66

99999.00

23.84

34.9

951.36

75.3

9110.65

162.

4223

8.40

9999

9.00

RESI

S.

210.86

267.

5034

6.91

424.

9545

2.99

371.59

222.

07117.44

Page 34: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-s F

IELD

CU

RVE

in

cr

DIL

LON

20

oo

o D

IGIT

IZE

DC

ALC

ULA

TED

DILL

ON 2

0

1 10

10

0EL

ECTR

ODE

SPAC

ING

CAB/

2}

IN METERS

LU cr

1000

.1

1 10

10

0 10

00

ELEC

TRO

DE

SP

AC

ING

C

AB

/2)

OR

DEP

TH

IN

MET

ERS

AB/2,

m

( ft

) Ap

p. Re

s.AB

/2,

m

( ft

)

App.

Res.

DEPTH, m

( ft

) RESIS.

DEPT

H, m

( ft

0.91

1. 1. 2.

.22

.83

.44

3.05

4.27 05

27 10 14

12.1

9

3.00

4.00

6.00

8.00

10.00

14.00

10.0

014.00

20.00

30.00

40.00

440.00

390.00

228.00

133.00

90.00

53.00

103.

0057.00

39.00

40.00

39.00

18.

24.

30.

42.

30.

42.

60.

91.

121.

182.

243.

29 38 48 67 48 67 96 44 92 88 84

60.00

80.00

100.

0014

0.00

100.

0014

0.00

200.00

300.

0040

0.00

600.

0080

0.00

51.00

58.00

67.00

85.00

60.00

72.00

89.00

90.00

105.

0011

5.00

115.

00

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.29

18.0

5

568.

46299.04

129.

0761

.04

33.87

22.60

22.94

8.07

11

.85

17.39

25.5

3 37.47

55.01

80.7

4 99

999.

00

26.4

9 38

.88

57.0

7 83

.76

122.95

180.47

264.

89

9999

9.00

RESIS.

31.9

751

.04

80.92

112.11

131.

8813

8.08

133.

75121.41

Page 35: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

&-e-o FIELD

CURVE

DILLON 2

1

§ .1

§o

o o DI

GITI

ZED

CALCULATED

DIL

LON

21

t/3

LU a:

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2}

IN M

ETER

S10

00.1

1

10

100

1000

EL

ECTR

OD

E S

PA

CIN

G C

AB

/23

OR

DEP

TH

IN

MET

ERS

AB/2, m

( ft

) App. Res.

AB/2, m

( ft

) App. Res.

DEPTH, m

( ft

)

0.91

1. 1. 2. 3.

3.

.22

.83

.44

.05

.05

4.27

6.10

9.14

12.19

3.00

4.00

6.00

8.00

10.00

10.00

14.00

20.00

30.00

40.00

115.00

110.00

97.00

95.00

97.00

93.00

102.00

104.00

103.00

103.00

18.29

24.38

30.48

30.48

42.67

60.96

91.44

121.92

182.88

243.84

60.00

80.00

100.00

100.00

140.00

200.00

300.00

400.00

600.00

800.00

106.00

115.00

121.00

117.00

132.00

137.00

160.00

187.00

213.00

238.00

0.50

0.73

1.07

1.57

2.30

3.37

4.95

1.62

2.38

3.50

5.14

7.54

11.07

16.24

RESIS.

DEPTH, m

( ft

)

RESIS.

127.73

7.27

23.84

88.16

72.48

10.67

34.99

105.33

67.96

15.65

51.36

120.43

91.49

22.98

75.39

122.92

113.99

33.73

110.65

135.18

109.08

49.51

162.42

175.14

90.60

72.66

238.40

239.40

99999.00 99999.00

314.90

Page 36: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

!o-e

-o F

IELD

CU

RVE

lte LL

J cr

.1

DIL

LON

22

o o o

DIG

ITIZ

ED

LU cr

1 10

10

0 EL

ECTR

ODE

SP

ACIN

G C

AB

/2}

IN M

ETER

S10

00

CALCULATED

DILL

ON 2

2

.1 1

10

100

ELEC

TROD

E SP

ACIN

G CA

B/2}

OR D

EPTH IN

MET

ERS

1000

KB/2, m

( ft

) Ap

p. Res.

KB/2

, m

( ft

) App. Res.

DEPTH, m

( ft

)RESIS.

DEPTH, m

{ ft

)

0.91

1 1 2 3 4.27

3.0

54.27

6.10

9.14

12.19

3.00

4.00

6.00

8.00

10.0

014.00

10.0

014.0

020.00

30.0

040.00

48.00

34.5

024.30

15.5

013

.50

14.50

18.00

18.00

19.50

25.60

33.30

18.

24.

30.

42.

30.

42.

60.

91.

121.

182.

243.

60.00

80.00

100.

0014

0.00

100.

0014

0.00

200.00

300.00

400.00

600.

00800.00

49.00

64.0

049.00

51.00

41.00

41.00

35.0

025.00

23.00

14.40

16.0

0

0.50

0.73

1.07

1.57

2.30

3.37

4.95

1.62)

2.38)

3.50

5.14

7.54

11.0

7 16.24

58.9

8

34.7

4

14.3

0

7.8

0

8.3

8

14.1

1

28

.25

7.2

7

10.6

7

15

.65

2

2.9

8

33

.73

4

9.5

1

72

.66

99999.0

0

23.8

4

34.9

9

51

.36

75.3

9

11

0.6

5

16

2.4

2

23

8.4

0

99999.0

0

RESIS.

52.3

275

.90

80.9

262

.38

35.55

17.3

211.17

14.11

Page 37: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-e F

IELD

CUR

VE

CO

LLJ cr

.110

DIL

LON

23

o

o o

DIG

ITIZ

ED

100

LO

LU cr

1000

CALCULATED

DILL

ON 2

3

ELEC

TROD

E SPACING

CAB/2}

IN MET

ERS

.1

1 10

100

1000

ELEC

TROD

E SPACING

CAB/2) OR

DEPTH IN M

ETER

S

AB/2,

m

( ft

) Ap

p. Re

s.KB/2,

m

( ft

)

App.

Re

s.DE

PTH,

m

( ft

)

RESIS.

DEPTH, m

( ft

)

0.9

11

.22

1.8

32.4

43

.05

4.2

73.0

54.2

76.1

09

.14

12.1

9

3.0

0)

4.0

06

.00

8.0

010.0

01

4.0

01

0.0

01

4.0

02

0.0

03

0.0

040.0

0

40

.00

34

.50

26.2

020.0

016.0

017.5

021.0

021.5

024.0

030.0

02

6.3

0

18 24 30 42 30 42 60 9112

118

224

3

.29

.38

.48

.67

.48

.67

.96

.44

.92

.88

.84

60.0

080.0

0100.0

0140.0

0100.0

0140.0

02

00

.00

30

0.0

04

00

.00

600.0

0800.0

0

26.5

026.0

025.0

025.2

030.0

031.0

030.5

033.0

02

7.0

01

8.5

015.0

0

0.5

00.7

31.0

71.5

72.3

03.3

74.9

5

1.6

22.3

83

.50

5.1

47

.54

11.0

71

6.2

4

79.7

7

60.1

5

22

.42

12.7

7

22

.44

4

0.1

0

47

.21

7.2

7

10.6

7

15.6

5

22

.98

33.7

3

49.5

1

72.6

6

99

99

9.0

0

23.8

4

34.9

9

51.3

6

75.3

9

11

0.6

5

16

2.4

2

238.4

0

99999.0

0

RE

SIS

.

39.4

627.9

123.3

629.9

544.2

44

6.4

227.2

710.0

2

Page 38: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-e F

IELD

CU

RVE

in

LU

cr

10

DIL

LON

2

4ooo D

IGIT

IZE

D

en LU cr

100

1000

CAL

CU

LATE

DDI

LLON

24

ELEC

TROD

E SP

ACIN

G CAB/23

IN MET

ERS

.1

1 10

100

1000

ELEC

TROD

E SPACING

CAB/23 OR

DEPTH IN

MET

ERS

KB

/2,

m

( ft

)

App

. R

es.

KB

/2,

m

( ft

)

App

. R

es.

DEP

TH,

m

( ft

)

RESIS.

DEPTH, m

( ft

)

0.9

11.2

2 83 44 05

1 2 4.2

73

.05

4.2

76.1

09.1

412.1

9

3.0

04

.00

6.0

08

.00

10.0

014.0

010.0

014.0

02

0.0

03

0.0

040.0

0)

22.0

01

7.5

01

5.5

01

6.3

01

6.5

01

8.3

02

2.3

02

5.2

02

6.3

02

8.8

030.2

0

18

.29

24.3

830.4

84

2.6

730.4

84

2.6

76

0.9

69

1.4

41

21

.92

182.8

8243.8

4

60.0

08

0.0

01

00

.00

14

0.0

01

00

.00

14

0.0

0200.0

03

00

.00

400.0

06

00

.00

800.0

0

32.1

033.3

031.8

02

6.0

036.0

030.0

02

6.0

02

2.0

02

2.0

02

5.5

03

0.0

0

0.5

50.8

11.1

91.7

42.5

53.7

55.5

0

1.8

02.6

53.8

95.7

18.3

812.2

91

8.0

5

35.2

6

19.2

1

19.2

1

25.5

2

30

.03

3

2.1

7

37

.02

8.0

7

11.8

5

17.3

9

25.5

3

37.4

7

55

.01

80.7

4

99999.0

0

26

.49

3

8.8

8

57.0

7 83.7

6

12

2.9

5

180.

47

26

4.8

9

9999

9.00

RE

SIS

.

46.0

551.3

942.7

826.2

315.1

513.3

22

1.0

541.6

3

Page 39: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-o F

IELD

CU

RVE

o

z >-

>

.110

DIL

LON

25

oo

o D

IGIT

IZE

D

o

z LU

cr

100

1000

CAL

CU

LATE

DD

ILLO

N 2

5

ELECTRODE

SPAC

ING

CAB/ 2}

IN METERS

.1

1 10

10

0 10

00

ELEC

TRO

DE

SPAC

ING

CA

B/2

3 OR

DEP

TH

IN M

ETER

S

AB/2, m

( ft

) App. Res.

KB/2, m

( ft

) App. Re

s.DEPTH, m

( ft

RESIS.

DEPTH, m

( ft

)

0.91

1.22

1. 2. 3. 4.27

3.

.83

.44

.05

.05

4.27

6.10

9.14

12.19

3.00)

.00)

6.00

8.00

10.00

14.00

10.00

14.00

20.00

30.00

40.00

28.00

19.80

19.00

21.30

23.00

28.00

28.50

35.00

43.00

57.80

67.50

18 24 30 42 30 42 60 91121

182

243

.29

.38

.48

.67

.48

.67

.96

.44

,92

.88

.84

60.00

80.00

100.00

140.00

100.00

140.00

200.00

300.00

400.00

600.00

800.00

74.00

76.00

79.50

77.00

97.00

54.00

70.00

64.00

60.00

58.50

53.00

0.50

0.73

1.07

1.57

2.30

3.37

4.95

1.62

2.38

3.50

5.14

7.54

11.07

16.24

21.73

11.38

11.51

17.38

29.72

48.63

66.05

7.27

10.67

15.65

22.98

33.73

49.51

72.66

99999.00

23.84

34.99

51.36

75.39

110.65

162.

42]

238.40!

99999.00]

RESIS.

69.91

62.82

60.12

68.86

79.18

76.78

62.78

45.95

Page 40: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

FIE

LD

CURV

E

en

LU

cr

.110

DIL

LON

26

o o

o D

IGIT

IZE

DCALCULATED

DIL

LON

26

en

LU

cr

100

1000

ELEC

TRO

DE

SPAC

ING

CA

B/2

) IN

MET

ERS

.1

1 10

10

0 10

00

ELEC

TRO

DE

SPAC

ING

CA

B/2

) OR

DEP

TH

IN M

ETER

S

KB/2,

m

( ft

)

0.91

1.22

1.83

2.44

3.05

4.27

3.05

4.27

6.10

9.14

12.19

3.00

4.00

6.00

8.00

10.00

14.00

10.00

14.00

20.00

30.00

40.00

App.

Res.

350.

00230.00

117.

0075.00

54.00

42.00

49.50

39.00

42.00

51.00

55.00

AB/2,

m

( ft

) Ap

p. Res.

DEPTH, m

( ft

)

18.

24.

30.

42.

30.

42.

60.

91.

121.

182.

243.

29 38 48 67 48 67 96 44 92 88 84

60.0

080.00

100.

0014

0.00

100.

0014

0.00

200.

0030

0.00

400.

0060

0.00

800.

00

65.00

74.00

73.00

66.00

82.00

75.00

64.00

47.00

30.00

18.00

14.00

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.29

18.0

5

RESTS.

DEPTH, m

( ft

) RESTS.

44

8.9

8

8.0

7

26.4

9

85

.51

178.08

11.85

38.88

107.23

55.36

17.39

57.07

113.

502

7.6

5

25

.53

83.7

6

98

.11

32.0

4

37

.47

122.9

5

66.5

545.2

9

55.0

1

18

0.4

7

33

.92

62.6

1 80.74

264.

89

15.50

99999.00 99

999.

00

10.34

Page 41: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-e F

IELD

CU

RVE

in LJU

cr

.110

DIL

LON

27

oo

o D

IGIT

IZE

D

8

LU cr

100

1000

CAL

CU

LATE

DDI

LLON

27

ELECTRODE

SPAC

ING

CAB/

2)

IN METERS

.1

1 10

10

0 10

00ELECTRODE

SPAC

ING

CAB/

2) OR D

EPTH IN

MET

ERS

AB

/2,

m

( ft

)

App

. R

es.

AB

/2,

m

( ft

)

App

. R

es.

DE

PTH

, m

(

ft

)R

ES

IS.

DE

PTH

, m

(

ft

)

0.9

11

.22

1.8

32

.44

3.0

53.0

54.2

76.1

09.1

412.1

9

3.0

04

.00

6.0

08

.00

10.0

010.0

014.0

02

0.0

030.0

040.0

0

70.0

043.0

040.6

039.0

037.5

03

6.5

039.5

04

2.5

049.5

05

3.5

0

18.2

92

4.3

830.4

830.4

84

2.6

76

0.9

691.4

41

21

.92

18

2.8

8243.8

4

60

.00

80

.00

10

0.0

0100.0

0140.0

0200.0

03

00

.00

400.0

06

00

.00

800.0

0

55

.00

55

.00

56

.00

58

.00

60

.60

50

.00

48

.00

45

.50

40.0

04

1.0

0

0.5

00.7

31.0

71.5

72

.30

3.3

74.9

5

1.6

22

.38

3.5

05.1

47.5

41

1.0

716.2

4

53.8

1 39.02

32.43

32.7

9 38

.56

47.2

6 55

.59

7.27

10.67

15.6

5 22.98

33.73

49.51

72.6

6 99

999.

00

23.8

4)

34.9

9 51.36

75.3

9 11

0.65

162.42

238.40

99999.00

RE

SIS

.

62.5

067.7

067.5

660.0

95

0.2

44

2.7

139.0

53

9.0

6

Page 42: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

: o-e-o F

I EL

D CURVE

DILLON 2

8ooo DIGITIZED

te in LLJ

cc

.1

1/3

LLJ

CC

1 10

10

0EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETER

S10

00

CALCULATED

DIL

LON

28

.1

1 10

10

0 10

00EL

ECTR

OD

E SP

ACIN

G C

AB

/2)

OR

DEP

TH

IN M

ETER

S

AB/2,

m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

)

0.91 22 83 44 05 27 05 27

6.10

9.14

3.00

4.00

6.00

8.00

10.00

14.00

10.0

014.00

20.0

030.0

0

8.50

9.70

10.3

012

.10

14.9

020.80

16.60

23.00

33.0

050.00

12.1

918.29

24.38

30.48

30.48

42.6

760.96

91.44

121.

9218

2.88

243.84

40.00

60.0

080.00

100.

00100.00

140.

00200.00

300.

0040

0.00

600.

0080

0.00

App.

Re

s.

62.00

74.0

082

.00

75.00

76.0

066

.00

50.0

050.00

47.00

50.0

048

.00

DEPT

H, m

( ft

)RE

SIS.

DE

PTH,

m

( ft

)

0.45

0.65

0.96

1.41

2.07

3.04

4.46

1.46

2.15

3.15

4.62

6.78

9.96

14.6

2

10.0

46.

468.59

17.73

39.15

78.9

3136.92

6.54

9.60

14.09

20.6

830.35

44.55

65.40

9999

9.00

21.4

631

.49

46.2

367

.85

99.59

146.

18214.56

99999.00

RESI

S.

191.55

195.09

132.

1562.30

30.33

28.5

142.58

50.5

8

Page 43: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e-e FIELD

CURVE

in LU a:

DILL

ON 2

9ooo DIG

ITIZ

ED

fe

in UJ a:

1 10

100

ELEC

TROD

E SP

ACIN

G CAB/2)

IN MET

ERS

1000

CAL

CU

LATE

DD

ILLO

N

29

1 10

100

1000

ELEC

TROD

E SP

ACIN

G CA

B/2)

OR D

EPTH IN

METERS

AB

/2,

m

( ft

)

App

. R

es.

AB

/2,

m

( ft

)

App

. R

es.

0.9

11.2

21

.83

2.4

43.0

54.2

73.0

54.2

76

.10

9.1

412.1

9

3.0

04

.00

6.0

08

.00

10.0

014.0

010.0

014.0

02

0.0

03

0.0

04

0.0

0

29.0

021.0

017.3

018.0

019.0

020.0

021.5

022.3

021.8

02

3.0

02

3.8

0

18.2

92

4.3

83

0.4

84

2.6

730.4

84

2.6

760.9

691.4

4121.9

21

82

.88

243.8

4

60.0

08

0.0

0100.0

0140.0

0100.0

0140.0

02

00

.00

300.0

0400.0

0600.0

0800.0

0

23

.50

24

.90

22

.50

19.0

02

8.5

02

3.0

02

4.0

02

7.0

02

2.0

010.0

011.2

0

DE

PT

H,

m

(

0.5

00.7

3 07

ft

)RESIS.

DEPTH, m

( ft

)

,57

2.30

3.37

4.95

1.62

2.38

3.50

5.14

7.54

11.07

16.24

33.0

3

22

.93

21.6

6

23.9

4

26.2

5

28.4

7

30

.61

7.2

7

10

.67

15.6

5

22

.98

3

3.7

3

49

.51

72.6

6

9999

9.00

23

.84

) 34.9

9

51.3

6

75.3

9

110.6

5

162.4

2

23

8.4

0

99

99

9.0

0

RESIS.

30.68

27.51

25.43

28.83

33.45

27.68

15.54

9.04

Page 44: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

&-&

- >

FI E

LD

CURV

E

in LLJ cr

.1

DIL

LON

30

o

o

o D

IGIT

IZE

D

o z UJ cc

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETER

S10

00

CALCULATED

DIL

LON

3D

.1

1 10

10

0 10

00

ELEC

TRO

DE

SPAC

ING

C

AB

/2)

OR

DEP

TH

IN

MET

ERS

AB

/2,

m

( ft

)

App

. R

es.

AB

/2,

m

( ft

)

App

. R

es.

0.9

11

.22

.83

.44

.05

.27

.05

1.

2 3 4.

3 4.2

76.1

09.1

41

2.1

9

3.0

04.0

06

.00

8.0

01

0.0

014.0

01

0.0

01

4.0

020.0

03

0.0

04

0.0

0

34

.50

24

.20

30

.00

37

.70

42

.00

50

.00

46.0

054.0

058.0

05

2.0

03

8.0

0

18.

24.

30.

42.

30.

42

.60

.91

.121.

182.

24

3.

60.0

080.0

01

00

.00

140.0

0100.0

01

40

.00

20

0.0

03

00

.00

40

0.0

0600.0

0800.0

0

21.5

014.0

010.0

09.3

011.8

010.5

011.5

013.8

01

4.5

021.0

026.0

0

DE

PTH

, m

(

0.5

0

(0.7

3

(1.0

71.5

72

.30

3.3

74.9

5

ft

)

1.6

22.3

83.5

05.1

47.5

41

1.0

716.2

4

RE

SIS

.

24

.14

25.9

34

6.8

085.7

31

23

.98

122.8

273.0

9

DE

PTH

, m

(

ft

)

7.2

710.6

71

5.6

52

2.9

833.7

349.5

17

2.6

699999.0

0

23.8

4)

34.9

95

1.3

6)

75.3

9)

110.6

5)

162.4

2)

23

8.4

0)

99999.0

0)

RE

SIS

.

24

.23

6.4

35.5

29

.53

9.2

51

0.4

81

9.9

249.4

6

Page 45: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

!o-e

-o FIELD CURVE

DILL

ON 3

1go o o DI

GITI

ZED

CALCULATED

DIL

LON

31

in LU cr

.11

10

100

ELEC

TRO

DE

SP

AC

ING

CA

B/2

) IN

MET

ERS

to

LU

a:

1000

.1

1 10

10

0 10

00

ELEC

TRO

DE

SP

AC

ING

CA

B/2

) O

R D

EPTH

IN

M

ETER

S

KB/2

, m

( ft

) Ap

p. Re

s.KB/2, m

( ft

) Ap

p. Re

s.DEPTH, m

( ft

)RESIS.

DEPTH, m

( ft

)

0.9

1,2

2

1.8

3

2.4

4

3.

3.

4..0

5.0

5.2

76.1

09.1

412.1

9

3.0

04.0

06

.00

8.0

010

.00

10.0

014.0

020.0

03

0.0

04

0.0

0

87

.00

92.0

0100.0

01

05

.00

11

4.0

01

13

.00

112.0

01

06

.00

92.0

067.0

0

18.2

924.3

830.4

830.4

842.6

760.9

691.4

41

21

.92

182.8

8243.8

4

60.0

0 80.00

100.

00

100.

00

140.

00

200.00

300.00

400.00

600.

00

800.

00)

40.0

028.5

022.5

026.0

021.0

014.2

014.0

014.4

015.0

014.7

0

0.5

50

.81

1.

1..1

9.7

42

.55

3.7

55.5

0

1.8

02.6

53.8

95

.71

8.3

812.2

918.0

5

95.6

5 105.77

129.80

159.51

176.

38

156.51

97.5

5

8.07

11.8

5 17

.39

25.5

3 37

.47

55.01

80.7

4 99999.00

26.4

9 38

.88

57.07

83.7

6 12

2.95

18

0.47

26

4.89

99

999.

00

RE

SIS

.

46.9

529.9

726.7

315.4

610.3

912.9

815.8

815.0

9

Page 46: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

Q-&

-B F

IELD

CU

RVE

t/3

LJJ cr

DIL

LON

32

o

o

o D

IGIT

IZE

DCA

LCUL

ATED

DIL

LON

32

t/3

LU cr

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETER

S10

00

t i

.1

1 10

10

0 10

00EL

ECTR

OD

E SP

ACIN

G

CA

B/2

) O

R D

EPTH

IN

M

ETER

S

AB/2,

m

( ft

) Ap

p. Re

s.AB

/2, m

( ft

) Ap

p. Res.

DEPTH, m

( ft

)RESIS.

DEPTH, m

( ft

)

0.91

1.22

1.83

2.44

3.05

4.27

3.05

4.27

6.10

9.14

12.19

3.00

) 4.

00)

6.00

) 8.

00

10.00

14.0

0 10.00

14.00

20.00

30.0

0 40.00

255.00

315.00

245.00

235.00

253.00

293.00

310.00

350.00

460.00

530.00

488.00

18 24 30 42 30 42 60 91121

182

243

.29

.38

.48

.67

.48

.67

.96

.44

.92

.88

.84

60.00)

80.00

100.

00

140.

00

100.00

140.

00

200.

00

300.00

400.

00

600.

00

800.

00

520.

0050

5.00

483.

0054

5.00

565.00

645.

0063

0.00

670.

00690.00

650.

0057

0.00

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.29

18.05

588.03

260.

17

179.33

289.

77

598.

46

925.

18

966.49

8.07

11

.85

17.39

25.5

3 37.47

55.0

1 80.74

9999

9.00

26.49

38.88

57.0

7 83.76

122.

95

180.47

264.

89

9999

9.00

RESIS.

745.41

531.

3547

3.21

567.

3575

2.07

897.97

787.97

472.

63

Page 47: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-e F

IELD

CU

RVE

If te in

LU

a:

.110

DIL

LON

33

100

§o

o

o

DIG

ITIZ

ED

en

LU

cr

1000

CALCULATED

DILLON 3

3

ELEC

TROD

E SP

ACIN

G CA

B/2)

IN METERS

1 10

100

ELEC

TROD

E SP

ACIN

G CA

B/2)

OR

DEPTH IN

MET

ERS

1000

AB/2,

m (

ft

) App. Re

s.AB/2,

m

( ft

) Ap

p. Re

s.DEPTH, m

( ft

)

0.91

2.44

3.05

4.27

3.05

4.27

6.10

9.14

12.1

9

3.00

4.00

6.00

8.00

10.0

014.00

10.00

14.00

20.00

30.00

40.00

590.

00460.00

360.00

310.

0026

0.00

300.

0018

0.00

210.00

280.

0037

0.00

440.00

18.

24,

30,

42,

30.

42.

60.

91.

121.

182.

243.

60.0

080.00

100.

0014

0.00

100.

0014

0.00

200.

0030

0.00

400.

0060

0.00

800.

00

533.

00540.00

565.00

565.00

655.

0064

0.00

515.00

510.00

560.00

600.

00720.00

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.2

918.05

RESIS.

523.

5435

4.56

155.77

103.67

193.57

442.

6282

4.61

DEPT

H, m

( ft

)

8.07

(

11.85

17.39

25.53

37.4

7 55.01

80.74

9999

9.00

i

26.49

38.88

57.07

83.76

122.

95

180.47

264.

89

9999

9.00

RESI

S.

1189.97

1280.08

966.

48517.13

280.

9829

0.05

541.

061124.41

Page 48: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-e F

IELD

CU

RVE

in

LU

cc

.1

DIL

LON

34

o

o o

DIG

ITIZ

ED

LU

cc

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETE

RS

1000

CALC

ULAT

EDD

ILLO

N 3

4

1 10

10

0 10

00

ELEC

TRO

DE

SPAC

ING

CA

B/2

) OR

DEP

TH

IN M

ETER

S

AB/2, m

( ft

) App. Res.

KB/2,

m

( ft

) Ap

p. Res.

DEPTH, m

( ft

)RESIS.

DEPTH, m

( ft

)

.91

.22

.83

.44

.05

.05

4.27

6.10

9.14

12.19

3.00

4.00

6.00

8.00

10.00

10.00

14.00

20.00

30.00

40.00

600.00

660.00

780.00

805.00

800.00

820.00

660.00

520.00

450.00

435.00

18.29

24.38

30.48

30.48

42.67

60.96

91.44

121.92

182.88

243.84

60.00)

80.00

100.00)

100.00)

140.00

200.00

300.00

400.00

600.00

800.00

390.00

375.00

365.00

350.00

325.00

312.00

290.00

315.00

363.00

450.00

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.29

18.05

522.28

910.38

1236.28

1054.93

574.84

314.57

294.22

8.07

11.85

17.39

25.53

37.47

55.01

80.74

99999.00

99999.00)

26.49

38.88

57.07

83.76

122.95

180.47

264.89

RESIS.

361.36

404.36

397.48

316.06

215.61

197.11

316.89

676.54

Page 49: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

'o-e

-o F

IELD

CU

RVE

in

LU

a:

DIL

LON

35

o o

o D

IGIT

IZE

D

LLJ

a:

1 10

10

0 EL

ECTR

ODE

SP

ACIN

G C

AB

/2)

IN M

ETER

S10

00

CALCULATED

DIL

LON

35

.1

1 10

10

0 10

00EL

ECTR

ODE

SP

ACIN

G C

AB/2

) OR

DEP

TH

IN M

ETER

S

KB/2

, m

( ft

) Ap

p. Re

s.KB/2,

m

( ft

)

App.

Res.

DEPT

H, m

( ft

)

RESIS.

DEPT

H, m

( ft

)

0.91

1.22 .83

1.

2.44

3.

3..05

.05

4.27

6.10

9.14

12.1

9

3.00)

4.00

6.00

8.00

10.00

10.00

14.00

20.00

30.00

40.00

122.00

132.00

177.00

205.00

206.00

205.00

187.00

170.00

160.00

156.00

18.

24.

30.

42.

30.

42.

60.

91.

121.

182.

243.

29 38 48 67 48 67 96 44 92 88 84

60.00

80.0

0100.00

140.

00100.00

140.

0020

0.00

300.

00400.00

600.00

800.00

152.

0013

0.00

110.

0010

7.00

140.

0013

7.00

120.

0017

5.00

210.

00205.00

180.

00

0.55

0.81

1.19 74 55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.29

18.0

5

120.68

270.77

426.18

403.

02

254.11

162.68

172.

51

8.07

11

.85

17.39

25.53

37.4

7 55

.01

80.7

4 99

999.

00

26.4

9 38.88

57.07

83.76

122.

95

180.

47

264.

89

99999.00

RESIS.

243.95

215.35

100.

8065

.47

123.

53286.58

354.70

179.

69

Page 50: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-«

-0 F

I ELD

CU

RVE

I

in

LLJ

cc

.1

DIL

LON

36

o o

o D

IGIT

IZED

in ULJ

cc

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN

MET

ERS

1000

CALC

ULAT

EDD

ILLO

N

36

t I I i i

1 10

10

0EL

ECTR

OD

E S

PA

CIN

G

CA

B/2

) O

R D

EPTH

IN

M

ETER

S10

00

KB/2, m

( ft

) Ap

p. Re

s.KB/2,

m

( ft

) Ap

p. Res.

DEPT

H, m

( ft

)

0.91

12.1

9

3.00

4.00

6.00

8.00

10.0

010

.00

14.0

020.00

30.00

40.00

1400.00

1500.00

1700

.00

1750

.00

1700.00

1550.00

1270.00

850.00

593.

00460.00

18.

24.

30.

42.

30.

42.

60.

91.

121.

182.

243.

60.0

080.00

100.

0014

0.00

100.

0014

0.00

200.

0030

0.00

400.

0060

0.00

800.

00

280.00

255.00

269.00

295.00

247.00

280.00

290.

00300.00

300.

00290.00

280.00

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.29

18.0

5

RESI

S.

DEPT

H, m

( ft

1138.00

1632.43

2007.96

1855.45

1251.18

703.32

391.

18

8.07

11

.85

17.3

9 25.53

37.4

7 55

.01

80.7

4 99999.00

26.4

9 38

.88

57.07

83.76

122.95

180.47

264.

89

9999

9.00

RESI

S.

225.

27187.48

233.

4128

8.96

324.

4133

5.86

313.54

266.

75

Page 51: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-o F

IELD

CU

RVE

in

LU

cr.

10

DIL

LON

37

100

C/3

LU a:

1000

CALCULATED

DILL

ON 3

7

ELEC

TROD

E SP

ACIN

G CA

B/2)

IN METERS

.1

1 10

100

1000

EL

ECTROD

E SPACING

CAB/

2) OR

DEPTH IN

MET

ERS

AB/2,

m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

)

App.

Re

s.DE

PTH,

m

( ft

)RESIS.

DEPTH, m

( ft

)

0.91

,22

,83

2.44

.05

.27

.05

.27

,10

9.14

3.00

4.00

6.00

8.00

10.00

14.00

10.00

14.00

20.00

30.00

150.

0016

1.00

177.00

194.00

213.00

228.00

180.

00192.00

205.00

233.00

12.

18.

24.

30.

30.

42.

60.

91.

121.

182.

243.

40.00

60.0

080.00

100.

0010

0.00

140.

00200.00

300.

0040

0.00

600.

0080

0.00

240.00

200.

0019

0.00

185.

0019

7.00

178.

0016

6.00

165.

0017

3.00

200.

0021

7.00

0.50

0.73

1.07

1.57

2.30

3.37

4.95

1.62

2.38

3 5.5

0.14

7.54

11.0

716

.24

125.76

141.78

167.30

201.71

246.53

288.

61

296.

59

7.27

10.67

15.65

22.9

8 33.73

49.5

1 72

.66

99999.00

23.8

4 34.99

51.36

75.39

110.

65

162.42

238.40

99999.00

RESI

S.

264.

1621

8.46

177.

10145.04

132.

96149.34

190.94

245.62

Page 52: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

!o-e

-e F

IELD

CU

RVE

in

LLI

cc

.110

100

DIL

LON

38

o o

o D

IGIT

IZE

DCALCULATED

DIL

LON

38

in UJ

cc

1000

ELEC

TRO

DE

SPAC

ING

CA

B/2

} IN

MET

ERS

.1

1 10

100

1000

ELECTRODE

SPACING

CAB/2} OR

DEPTH IN

METERS

AB/2,

m

( ft

) Ap

p. Res.

AB/2,

m

( ft

) Ap

p. Re

s.DE

PTH,

m

( ft

RESI

S.DE

PTH,

m

( ft

)

0.91

1.22

1.83

2.44

3.05

3.05

4.27

6.10

9.14

12.1

9

3.00

4.00

6.00

8.00

10.00

10.0

014.00

20.00

30.00

40.00

150.

0014

0.00

153.

0015

3.00

156.00

150.

0014

5.00

117.

0097.00

92.00

18.2

924.38

30.48

42.67

30.48

42.67

60.96

91.44

121.92

182.

8824

3.84

60.0

080.00

100.

0014

0.00

100.

0014

0.00

200.

0030

0.00

400.

00600.00

800.

00

107.00

122.00

131.00

124.00

145.

0012

7.00

116.

0010

2.00

100.

0091.00

116.00

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.2

918.05

12

3.8

0

14

7.9

2

19

6.1

5

222.6

0

15

8.7

2

74.8

2

50.6

6

8.0

7

11

.85

17.3

9

25

.53

3

7.4

7

55.0

1

80.7

4

99

99

9.0

0

26

.49

38.8

8

57

.07

83.7

6

122.9

5

180.4

7

264.8

9

99999.0

0

RESI

S.

83.0

9163.73

217.

1817

6.41

97.8

554.56

60.73

152.99

Page 53: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

go

-e-o

FIE

LD

CURV

E

in

LLJ

cr

.110

DIL

LON

39

o o

o D

IGIT

IZED

CALCULATED

DIL

LON

39

in

LU

cr

100

1000

ELEC

TRO

DE -

SPAC

ING

CA

B/2

) IN

MET

ERS

.1

1 10

10

0 10

00EL

ECTR

ODE

SPAC

ING

CAB/

2) OR

DEPTH IN M

ETERS

KB/2,

m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

) App. Res.

DEPT

H, m

( ft

)RESTS.

DEPTH, m

( ft

)

0.9

11.2

21.8

32.4

43

.05

4.2

73.0

54

.27

6.1

09

.14

3.0

04.0

06.0

08.0

010.0

014.0

010.0

014.0

02

0.0

03

0.0

0

15

2.0

01

20

.00

12

0.0

01

37

.00

92.0

02

3.0

01

78

.00

42

.00

14.8

013.0

0

12.1

918.2

92

4.3

830.4

84

2.6

730.4

842.6

76

0.9

691.4

4121.9

2

40.0

060.0

080.0

0100.0

0140.0

0100.0

0140.0

0200.0

03

00

.00

40

0.0

0

12.7

014.0

015.2

015.1

014.8

019.0

016.5

019.0

015.6

015.0

0

0.4

80.7

01.0

31

.52

2.2

33

.27

1.5

72.3

13.3

94.9

87.3

110.7

3

25

0.4

22

68

.12

208.4

588.5

92

4.8

313.8

4

4.8

07.0

410.3

415.1

82

2.2

832.7

099999.0

0

15.7

523.1

133.9

249.7

973.0

91

07

.28

99999.0

0

RE

SIS

.

13.8

815.2

416.7

517.7

617.5

416.3

515.1

2

Page 54: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

O-B

-O F

IELD

CU

RVE

.1

DIL

LON

40

o

o

o D

IGIT

IZE

D

LU DC

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETER

S10

00

CALCULATED

DIL

LON

40

1 10

10

0 10

00

ELEC

TRO

DE

SPAC

ING

C

AB

/2)

OR

DEP

TH

IN

MET

ERS

AB/2,

m

( ft

) Ap

p. Res.

AB/2,

m

( ft

) Ap

p. Res.

DEPTH, m

( ft

)RESIS.

DEPTH, m

( ft

0.91

1.22

1.83

2.44

3.05

3.05

4.27

6.10

9.14

12.19

3.00

4.00

6.00

8.00

10.0

010.00

14.00

20.00

30.00

40.00

435.00

335.00

250.00

191.00

145.00

157.00

104.00

73.00

46.00

40.00

18.

24.

30.

42.

30.

42.

60.

91.

121.

182.

243.

60.0

080.00

100.

00140.00

100.

0014

0.00

200.00

300.00

400.

0060

0.00

800.

00

39.50

36.50

34.00

27.00

31.00

26.50

21.50

24.60

32.0

051

.00

60.00

0.61

0.90 .32

.93

.84

.16

1. 1. 2.

4.

6.11

2.01

2.94

4.32

6.34

9.31

13.6

620.05

488.48

299.00

175.58

122.

8794.64

47.16

27.6

5

8.97

13.1

719

.33

28.3

741.64

61.1

289

.71

99999.00

29.43

43.2

063

.41

93.07

136.

6120

0.52

294.

3299999.00

RESI

S.

38.6

653.03

37.2

014.19

9.79

22.59

69.95

204.

46

Page 55: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-e F

IELD

CU

RVE

in

LU

ac

.1

t i

DIL

LON

41

oo

o D

IGIT

IZE

D

CO

LU

DC

CALC

ULAT

EDD

ILLO

N 4

1

t i

1 10

10

0EL

ECTR

ODE

SP

ACIN

G C

AB

/2}

IN M

ETER

S1000

1 10

100

1000

ELECTRODE

SPAC

ING

CAB/

2} OR

DEPTH IN

METERS

KB/2

, m

( ft

)

App. Re

s.KB/2,

m

( ft

)

App.

Res.

DEPT

H, m

( ft

RESIS.

DEPTH, m

(

.91

.22

,83

.44

.05

.05

4.27

6.10

9.14

12.19

3.00

4.00

6.00

8.00

10.0

010.0

014.0

020

.00

30.0

040

.00

9.70

6.20

4.30

4.40

9.10

18.2

924.38

30.48

.30.48

(42

.67

60.9

691.44

121.

92182.88

243.84

60.0

0)

80.0

0)

100.00

100.00

140.00

200.00

300.00

400.00

600.00

800.00

11.4

014.3

014.8

016.0

015.0

016.0

023.4

027.5

030.0

02

7.0

0

0.5

00

.73

1.0

71.5

72.3

03.3

74.9

5

1.6

22

.38

3.5

05.1

47

.54

11

.07

16.2

4)

11.3

83

.73

2.4

12.8

24.4

27.5

312.6

0

7.2

710.6

715.6

52

2.9

83

3.7

349.5

172.6

6

ft

)

23.84

34.99

51.36

75.39

110.65

162.42

238.40)

99999.00

99999.00)

RESIS.

18.99

22.0

018

.80

15.6

918

.80

29.5

538

.09

31.2

0

Page 56: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

e-e-o FIELD

CURVE

DILLON 4

2o o o DIGITIZED

CALCULATED

DIL

LON

42

in

LJU

cr

.1

uu

cr

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETER

S1000

1 10

10

0 10

00

ELECTRODE

SPAC

ING

CAB/

2) OR

DEPTH IN

MET

ERS

AB/2,

m

( ft

) App. Re

s.KB/2,

m

( ft

) Ap

p. Re

s.DE

PTH,

m

( ft

)RESIS.

DEPTH, m

( ft

)

0-91

2'.

3,

3,

.22

.83

.44

.05

.05

4.27

6.10

9.14

12.1

9

3.00

)4.00

)6.

008.

0010.00

10.0

014.00

20.00

30.00

40.00

780.00

680.00

700.00

670.

0068

0.00

690.

00560.00

375.00

178.

0012

2.00

18.2

924.38

30.4a

42.6

730.48

42.6

760

.96

91.44

121.92

182.

88243.84

60.00

80.00

100.

0014

0.00

100.

0014

0.00

200.00

300.00

400.

0060

0.00

800.

00

101.00

110.00

118.00

117.00

137.00

133.00

122.00

112.

00130.00

160.00

183.00

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.29

18.05

773.52

722.63

935.

47

1180

.44

865.45

268.

56

54.81

8.07

11.85

17.3

9 25

.53

37.4

7 55

.01

80.7

4 99999.00

26.49

38.88

57.07

83.76

122.

95

180.47

26.4.89

99999.00

RESI

S.

54.8

414

8.23

224.

10160.52

81.19

70.7

213

2.34

299.

63

Page 57: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-e F

IELD

CU

RVE

g

en UJ cr

DIL

LON

4

3o

o o

DIG

ITIZ

ED

in

LU

en

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETE

RS

1000

CALCULATED

DILL

ON 43

.1

1 10

10

0 1000

ELEC

TROD

E SP

ACIN

G CA

B/2)

OR D

EPTH IN

METERS

AB/2,

m

( ft

) App. Res.

KB/2,

m

( ft

) Ap

p. Res.

DEPT

H, m

( ft

)

0.91

1.22

1.83

2.44

3.05 .05

4.27

6.10

9.14

12.1

9

3.00

4.00

6.00

8.00

10.00

10.0

014.0

020

.00

30.00

40.00}

285.

00200.00

190.00

190.00

181.00

206.

00187.00

145.00

113.00

94.0

0

18,

24.

30.

42.

30.

42.

60.

91.

121.

182.

243.

60.0

080.00

100.

0014

0.00

100.

0014

0.00

200.00

300.

0040

0.00

600.

0080

0.00

93.0

011

0.00

105.

0012

0.00

123.

00141.00

150.

00142.00

185.00

122.50

140.

00

0.55

0.81 ,19

.74

1. 1. 2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.2

918.05

RESIS.

DEPTH, m

( ft

) RESIS.

293.

60

8.07

26

.49

87.62

266.

39

11.8

5 38.88

109.20

271.

34

17.3

9 57.07

133.88

267.

27

25.53

83.7

6 154.08

215.

45

37.4

7 122.95

170.

39138.23

55.01

180.47

173.65

90.81

80.74

264.89

155.11

999

99.0

0 99

999.

00

131.

77

Page 58: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

:o-e

-G F

IELD

CU

RVE

in

LLJ

cc

.110

DIL

LON

44

oo

o D

IGIT

IZE

DC

ALC

ULA

TED

DIL

LON

44

t/D

LJJ

CC

100

1000

ELEC

TROD

E SPACING

CAB/2)

IN METERS

.1

1 10

100

1000

ELECTR

ODE

SPAC

ING

CAB/2) OR DEPTH IN

METERS

KB/2,

m

( ft

) App. Res.

AB/2,

m

( ft

)

App.

Res.

DEPTH, m

( ft

)

0.91

1.22

1.83

2.44

3.05

4.27

3.05

4.27

6.10

9.14

3.00

4.00

6.00

8.00

10.0

014

.00

10.00

14.00

20.00

30.00

590.00

670.00

590.00

500.00

385.00

275.00

480.00

330.00

190.00

130.00

12.

18.

24.

30.

30.

42.

60.

91.

121.

182.

243.

40.00

60.00

80.00

100.

0010

0.00

140.

00200.00

300.

0040

0.00

600.

0080

0.00

122.

0012

1.00

113.

0010

8.00

113.

0011

3.00

130.

0014

0.00

148.

0016

0.00

170.

00

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.29

18.05

RESIS.

DEPTH, m

( ft

) RESIS.

886.20

8.07

26

.49

136.

86

967.57

11.85

38.8

8 11

3.21

858.87

17.39

57.0

7 95

.72

532.60

25.53

83.7

6 108.72

221.

31

37.4

7 12

2.95

13

4.75

10

3.94

55.01

180.

47

154.

20

113.67

80.7

4 264.89

169.

90

999

99.0

0 (99999.00

190.

58

Page 59: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e-G FIELD

CURVE

in

LU

cr

.110

DILLON 4

5o o o DI

GITI

ZED

CALCULATED

100

C/3

LU cr

DIL

LON

45

1000

ELEC

TRO

DE

SP

AC

ING

CA

B/2

} IN

M

ETE

RS

.1

1 10

10

0 10

00

ELE

CTR

OD

E

SP

AC

ING

C

AB

/2)

OR

D

EP

TH

IN

MET

ERS

AB/2, m

( ft

) App. Res.

AB/2, m

( ft

) App. Re

s.

0.91

.22

,83

1.

1.

2.44

3. 3. 4.

6.

.05

.05

.27

.10

9.14

12.19

3.00

4.00

6.00

8.00

10.00

10.00

14.00

20.00

30.00

40.00

105.00

85.00

59.00

47.00

40.00

43.00

37.00

44.00

66.00

86.00

18.

24.

30.

42.

30.

42.

60.

91.

121.

182.

243.

29 38 48 67 48 67 96 44 92 88 84

60.00

80.00

100.00

140.00

100.00

140.00

200.00

300.00

400.00

600.00

800.00

101.00

112.00

120.00

134.00

155.00

170.00

133.00

115.00

100.00

84.00

78.00

DEPTH, m

0.55

0.81

1.19

1.74

2.55

3.75

5.50

ft

)RESIS.

DEPTH, m

( ft

)

1.80

2.65

3.89

5.71

8.38

12.29

18.05

169.88

110.11

54.25

24.07

27.83

64.78

135.65

8.07

11.85

17.39

25.53

37.47

55.01

80.74

99999.00

26.49

38.88

57.07

83.76

122.95

180.47

264.89

99999.00

RESIS.

226.21

305.81

315.43

226.11

116.66

61.63

55.49

73.54

Page 60: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

FIE

LD

CURV

E

o z LLJ

DC

.110

DIL

LON

46

o o

o D

IGIT

IZE

D

C/3

LU

DC

10

010

00

CALC

ULAT

EDDI

LLON

46

ELEC

TROD

E SP

ACIN

G CA

B/2)

IN

MET

ERS

.1

1 10

100

1000

ELEC

TROD

E SP

ACIN

G CA

B/2}

OR D

EPTH IN

MET

ERS

KB/2,

m

( ft

) App. Re

s.KB/2,

m

( ft

) Ap

p. Res.

DEPT

H, m

( ft

)RE

SIS.

DEPTH, m

( ft

)

0.91 .22

.83

2.44 .05

.05

4.27

6.10

9.14

12.1

9

3.00

)4.00

6.00

)8.00

10.00

10.00

14.00

20.00

30.00

40.00

285.00

333.00

335.00

316.00

307.00

302.00

280.00

230.00

169.00

128.00

18.29

24.38

30.48

42.67

30.48

42.67

60.9

691.44

121.

92182.88

243.84

60.00

80.00

100.

0014

0.00

100.

0014

0.00

200.00

300.00

400.

0060

0.00

800.

00

90.0

077.00

62.00

60.0

073.00

67.0

060.00

64.00

60.00

65.00

87.0

0

0.55

0.81 .19

.74

1. 1. 2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.29)

18.05

338.23

393.

35

402.

21

379.

64

330.

40

244.39

155.19

8.07

11

.85

17.39

25.53

37.4

7 55

.01

80.74

9999

9.00

26.4

9 38.88

57.0

7 83

.76

122.

95

180.47

264.

89

9999

9.00

RESI

S.

103.49

77.0

065.69

66.39

54.05

39.62

51.36

116.93

Page 61: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

Q-e

- >

FIE

LD

CURV

E

in LLI

cr

.110

DIL

LON

47

o

o

o D

IGIT

IZE

D

en LLI

GC

100

1000

CAL

CU

LATE

DDILLON 4

7

ELECTRODE

SPAC

ING

CAB/2)

IN METERS

.1

1 10

100

1000

ELECTRODE

SPAC

ING

CAB/2) OR D

EPTH IN M

ETER

S

AB/2,

m

( ft

) Ap

p. Res.

AB/2,

m

( ft

)

App.

Res.

DEPT

H, m

( ft

)

0.91

1.22

1.83

2.44 .05

,05

4.27

6.10

9.14

12.1

9

3.00)

.00

.00

8.0

01

0.0

01

0.0

01

4.0

02

0.0

03

0.0

04

0.0

0

172.00

115.00

92.00

90.00

87.0

082

.00

70.00

55.00

40.00

29.00

18.2

924

.38

30.48

30.48

42.67

60.9

691

.44

121.

92182.88

243.

84

60.0

080.00

100.

0010

0.00

140.

00200.00

300.

00400.00

600.

0080

0.00

17.30

14.20

12.30

11.70

11.00

10.20

11.80

12.70

18.30

28.50

0.61

0.90

1.32

1.93

2.84

4.16

6.11

2.01

2.94

4.32

6.34

9.31

13.66

20.05

RESIS.

DEPTH, m

( ft

) RESIS.

140.37

8.97

29.43

14.9

166.2

2

13.1

7

43

.20

1

1.2

761.0

9

19.3

3

63.4

1

11.3

08

0.9

2

28.3

7

93.0

7

9.4

57

7.8

5

41

.64

1

36

.61

6

.82

52.7

3

61.1

2

200.5

2

7.7

72

8.5

9

89.7

1

294.3

2

19.5

89

9999.0

0

99999.0

0

79.0

3

Page 62: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

go

-s-o

FIE

LD

CURV

Eo

o

in LLJ cr

DIL

LON

4

8o

o

o D

IGIT

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D

.1

in LLJ cr

1010

010

00

CALC

ULAT

EDDI

LLON

48

ELEC

TROD

E SP

ACIN

G CA

B/2)

IN

METERS

.1

1 10

10

0 10

00

ELEC

TROD

E SP

ACIN

G CA

B/2)

OR D

EPTH IN

MET

ERS

KB/2,

m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

)

App.

Res.

DEPTH, m

( ft

)RESIS.

DEPTH, m

( ft

)

0.91

2.44

3.05

4.27

3.05

4.27

6.10

9.14

3.00

4.00

6.00

8.00

10.0

014

.00

10.0

014

.00

20.00

30.0

0

400.00

420.00

460.00

440.00

420.00

373.00

463.00

390.00

269.00

173.00

12,

18,

24,

30.

30.

42.

60.

91.

121.

182,

243,

40.00

60.0

0 80

.00

100.00

100.

00

140.00

200.

00

300.00

400.

00

600.00)

800.

00)

96.0

036.0

02

5.0

01

8.4

021.5

01

7.5

01

6.6

01

5.6

01

5.0

01

3.0

01

2.5

0

0.6

10

.90

.32

.93

.84

.16

1. 1. 2.

4. 6.1

1

2.0

12.9

44.3

26.3

49.3

113.6

62

0.0

5

474.8

1586.9

96

61

.60

622.0

44

64

.32

270.4

61

18

.64

8.9

71

3.1

71

9.3

328.3

741.6

461.1

289.7

199999.0

0

29

.43

43

.20

63

.41

93

.07

136.6

1200.5

22

94

.32

99999.0

0

RE

SIS

.

42

.40

21.6

51

7.3

31

6.1

31

6.4

115.6

01

3.3

51

1.2

3

Page 63: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-G F

I ELD

CU

RVE

^§ C/J

LU cr

DIL

LON

49

o

o

o D

IGIT

IZE

D

in

LU

a:

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETER

S10

00

CALCULATED

DIL

LON

49

.1

1 10

10

0 10

00EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

OR

DEP

TH

IN

MET

ERS

AB/2,

m

( ft

) Ap

p. Re

s.AB/2,

m

( ft

)

App. Res.

DEPTH, m

( ft

RESIS.

DEPTH, m

(

0.91

.22

.83

2.44

3. 3..05

.05

4.27

6.10

9.14

12.19

3.00

4.00

6.00

8.00

10.00

10.0

014.00

20.00

30.00

40.00

101.

0075.00

45.50

30.00

20.50

21.00

13.3

011

.40

10.00

10.00

18.2

924.38

30.4

842

.67

30.4

842

.67

60.96

91.44

121.92

182.88

243.

84

60.00)

80.00)

100.00

140.00

100.00

140.00

200.

00

300.

00

400.

00

600.00

800.00

9.5

09.4

08.0

07

.70

11.0

09.5

09.3

09.5

010.4

010.0

09.8

0

0.5

50.8

11.1

91.7

42.5

53.7

55.5

0

1.8

02.6

53.8

95

.71

8.3

812.2

918.0

5

15

2.1

28

3.7

436.7

21

6.8

512.0

812.0

112.6

8

8.0

71

1.8

51

7.3

925.5

337.4

755.0

180.7

499999.0

0

ft

)

26.4

93

8.8

85

7.0

78

3.7

6122.9

5)

18

0.4

7264.8

999999.0

0

RE

SIS

.

12.6

911.2

39.3

28.5

29.0

19.8

910.1

99.9

0

Page 64: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

0-e

-o F

IELD

CU

RVE

DIL

LON

50

oo

o D

IGIT

IZE

DC

ALC

ULA

TED

DIL

LON

50

in

LU QC

.11

10

100

ELEC

TRO

DE

SP

AC

ING

CA

B/2

3 IN

MET

ERS

I? te in

LU

QC

1000

1 10

10

0 10

00

ELEC

TRO

DE

SPAC

ING

C

AB

/23

OR

DEP

TH

IN

MET

ERS

KB/2, m

( ft

) Ap

p. Re

s.AS

/2,

m

( ft

) Ap

p. Res.

DEPT

H, m

( ft

)

0.91

1.22

1.83

2.44

3.05

3.05

4.27

6.10

9.14

12.19

3.00

)4.00)

6.00

8.00

10.00

10.00

14.00

20.00

30.00

40.00

64.0

060

.00

72.00

83.00

92.00

93.00

102.00

103.

0095.00

65.00

18.29

24.38

30.48

30.48

42.67

60.96

91.44

121.92

182.88

243.84

60.0

080.00

100.

0010

0.00

140.

00200.00

300.

00400.00

600.00

800.

00

32.00

22.50

16.50

16.0

016.00

17.80

18.2

018

.50

18.00

18.0

0

0.50

0.73

1.07

1.57

2.30

3.37

4.95

1.62

2.38

3.50

5.14

7.54

11.0

716

.24

RESI

S.

45.9

061

.85

89.32

129.47

171.

45173.33

107.73

DEPT

H, m

( ft

7.27

10

.67

15.6

5 22

.98

33.7

3 49.51

72.66

9999

9.00

23.84

34.9

9 51

.36

75.39

110.65

162.42

238.40

9999

9.00

RESIS.

36.17

9.79

8.30

14.5

319

.78

21.60

20.35

17.55

Page 65: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

gle-e

-o F

IELD

CU

RVE

in

LJJ

a:

.110

DIL

LON

51

oo

o D

IGIT

IZE

D

LJJ a:

100

1000

CALCULATED

DILL

ON 5

1

ELECTRODE

SPAC

ING

CAB/2}

IN METERS

.1

1 10

10

0 10

00ELECTRODE

SPACING

CAB/

2) OR D

EPTH IN

MET

ERS

AB/2,

m

( ft

)

App. Re

s.AB

/2,

m

( ft

)

App.

Re

s.DEPTH, m

( ft

)

RESIS.

DEPTH, m

( ft

)

0.9

11.2

21

.83

2.4

43.0

53

.05

4.2

76.1

09

.14

12.1

9

3.0

04.0

06.0

08.0

01

0.0

01

0.0

01

4.0

020.0

03

0.0

040.0

0

53

.20

44

.80

46

.80

53

.60

60.7

064.2

07

6.0

07

9.2

084.7

080.6

0

18

.29

24

.38

30.4

84

2.6

730.4

842.6

76

0.9

691.4

4121.9

2182.8

8

60

.00

80.0

0100.0

01

40

.00

100.0

0140.0

0200.0

0300.0

0400.0

06

00

.00

68.7

05

5.2

04

6.0

025.1

052.2

027.8

01

7.6

01

8.7

01

8.8

023.1

0

0.5

40.8

01.1

71.7

22.5

33.7

15.4

5

1.7

9)

2.6

23.8

55

.65

8.3

01

2.1

817.8

8

44.0

74

8.8

665.5

589.0

81

10

.56

123.4

2125.5

2

8.0

01

1.7

417.2

325.3

037.1

354.5

099999.0

0

26

.24

38

.52

56

.54

82.9

91

21

.81

178.8

09

99

99

.00

RE

SIS

.

113.0

777.1

632.2

41

1.5

910.0

41

6.1

327.8

6

Page 66: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

e-e

-£>

FI E

LD

CURV

E

in UJ cc

10

DIL

LON

52

oo

o D

IGIT

IZE

D

CD

UJ cr

100

1000

CALCULATED

DILL

ON 5

2

ELEC

TROD

E SP

ACIN

G CA

B/2)

IN

MET

ERS

.1

1 10

100

1000

ELECTRODE

SPAC

ING

CAB/

2) OR

DEPTH IN

MET

ERS

AB

/2,

m

( ft

)

App

. R

es.

AB

/2,

m

( ft

)

App

. R

es.

DEP

TH,

m

( ft

)

RE

SIS

. D

EPT

H,

m

(

0.9

1

2.4

43

.05

4.2

73

.05 27 10

9.1

4

3.0

04

.00

6.0

08

.00

10.0

014.0

010.0

014.0

02

0.0

03

0.0

0

55.8

039.4

029.7

02

7.2

02

8.3

03

3.2

03

2.2

03

8.0

04

7.7

059.9

0

12

.19

18

.29

24

.38

30

.48

30

.48

42.6

760.9

691.4

41

21

.92

18

2.8

8

40

.00

60.0

08

0.0

01

00

.00

10

0.0

01

40

.00

200.0

03

00

.00

40

0.0

06

00

.00

65

.50

67

.50

58

.60

48.3

05

4.3

03

2.2

01

8.4

01

4.5

01

6.9

02

5.1

0

0.5

40.8

01.1

71.7

22

.53

3.7

15.4

5

1.7

92.6

23.8

55.6

58.3

01

2.1

817.8

8

81.4

129.1

716.7

42

3.9

85

0.3

2100.0

81

59

.01

8.0

011.7

417.2

32

5.3

03

7.1

354.5

099999.0

0

ft

)

26

.24

38

.52

56.5

482.9

9121.8

1178.8

099

999.

00

RE

SIS

.

17

0.9

31

01

.50

27.3

64.3

43.3

818.0

61

07

.15

Page 67: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-o F

IELD

CU

RVE

in

LLJ

a:

.110

DIL

LON

53

oo

o D

IGIT

IZE

D

in

LU

a:

100

1000

CAL

CU

LATE

DDI

LLON

53

ELEC

TROD

E SP

ACIN

G CA

B/2)

IN M

ETER

S.1

1 10

10

0 10

00

ELECTRODE

SPAC

ING

CAB/

2) OR

DEPTH IN

MET

ERS

AB/2, m

( ft

)

App. Res.

AB/2, m

( ft

) App. Res.

0.91

1.22

.83

1.

2.44

3. 4.05 27 05

4.27

6.10

9.14

3.00

4.00

6.00

8.00

10.00

14.00

10.00

14.00

20.00

30.00

160.00

188.00

210.00

230.00

250.00

260.00

276.00

294.00

346.00

432.00

12.19

18.29

24.38

30.48

42.67

30.48

42.67

60.96

91.44

121.92

40.00)

60.00

80.00

100.00

140.00

100.00

140.00

200.00

300.00

400.00

490.00

521.00

517.00

514.00

532.00

545.00

556.00

583.00

531.00

548.00

DEPTH, m

(

0.53

0.78

1.15

3.63

ft

)

1.75

2.57

3.77

5.53

8.12

11.92

RESIS.

201.29

230.94

257.94

297.33

370.75

477.65

DEPTH, m

( ft

)

5.33

7.83

11.49

16.86

24.75

36.33

99999.00

17.50

25.68

37.69

55.33

81.21

119.20

99999.00

RESIS.

580.15

634.17

638.16

620.88

594.72

560.84

530.39

Page 68: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

FIELD

CURVE

DILLON 5

4

g

fc in

LU DC

.1

gooo DIG

ITIZ

ED

t/3

LU

OC

CALCULATED

DIL

LON

54

5

1 10

10

0 EL

ECTR

OD

E S

PA

CIN

G C

AB

/2}

IN M

ETER

S10

00.1

1

10

100

1000

EL

ECTR

OD

E SP

ACIN

G

CA

B/2

) O

R D

EPTH

IN

M

ETER

S

AB/2,

m

( ft

0.91 22 83 44 05 05 27 10

9.14

3.00 .00

6.00

8.00

10.0

010

.00

14.00

20.00

30.00

App.

Re

s.

47.30

18.20

15.10

14.40

13.30

13.8

014.10

13.80

11.80

AB/2,

m

( ft

) Ap

p. Res.

DEPT

H, m

( ft

RESI

S.

DEPT

H, m

( ft

)

12.1

918.2

924.3

830.4

830.4

842.6

760.9

69

1.4

41

21

.92

182.8

8

40.0

06

0.0

08

0.0

0100.0

0100.0

0140.0

02

00

.00

30

0.0

0400.0

0600.0

0

11.2

010.1

09.7

99.8

510.1

010.6

09.9

117.0

016.7

013.4

0

0.6

1

0.8

9

1.3

0

r.91

2.8

1

4.1

3

6.0

6

1.9

92.9

24.2

86.2

89.2

213.5

319.8

7

22.0

014.1

51

1.7

613.8

516.3

515.0

711.7

2

8.8

913.0

519.1

528.1

141.2

560.5

59

99

99

.00

29.1

6)

42.8

06

2.8

29

2.2

11

35

.35

19

8.6

699999.0

0

RE

SIS

.

8.9

07.5

08.2

512.0

51

7.8

219.2

013.1

5

Page 69: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

!e-e

-o F

IELD

CU

RVE

te LLJ

cr

10

DIL

LON

55

o o

o D

IGIT

IZE

D

100

ELEC

TRO

DE

SPAC

ING

CA

B/2

} IN

MET

ERS

LLJ

DC

1000

CALCULATED

DIL

LON

55

.1

1 10

10

0 10

00

ELEC

TRO

DE

SPAC

ING

CA

B/2

} OR

DEP

TH

IN M

ETER

S

KB/2

, m

( ft

) Ap

p. Re

s.AB/2, m

( ft

) Ap

p. Res.

DEPTH, m

( ft

)

0.91

.22

1.83

2.44

3.

3..05

.05

4.27

6.10

9.14

3.00

4.00

6.00

8.00

10.0

010.00

14.00

20.00

30.0

0

187.00

151.00

121.00

92.20

70.10

76.40

51.70

31.50

18.50

12.1

918

.29

24.3

830.48

42.6

730

.48

42.6

760

.96

91.4

4121.92

40.00

60.00

80.00

100.

0014

0.00

100.

0014

0.00

200.00

300.

0040

0.00

12.00

8.17

6.21

6.60

6.50

7.02

6.75

6.37

6.08

4.00

0.66

0.97

1.42

2.08

3.06

4.49

2.16

3.17

4.65

6.83

10.03

14.7

2

REST

S.

207.92

157.62

95.4

853.67

36.6

026.91

DEPT

H, m

( ft

)

6.58

9.66

14.18

20.82

30.5

644

.85

9999

9.00

21.60

31.70

46.54

68.31

100.

2614

7.16

99999.00

REST

S.

14.80

6.92

4.79

6.42

9.34

8.33

2.78

Page 70: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o

z i in

LU

cc

.1

FIE

LD

CURV

E

10

DIL

LON

56

o o

o

DIG

ITIZ

ED

CAL

CU

LATE

DD

ILLO

N

56

o

z in UJ cc.

100

1000

ELEC

TRO

DE

SP

AC

ING

CA

B/2

} IN

MET

ERS

.1

1 10

10

0 10

00

ELEC

TRO

DE

SPAC

ING

CA

B/2

) O

R D

EPTH

IN

M

ETER

S

AB/2,

m

( ft

) Ap

p. Res.

AB/2

, m

( ft

) Ap

p. Re

s.DE

PTH,

m

( ft

)RE

SIS.

DE

PTH,

m

( ft

)

0.9

11

.22

1.8

32

.44

3.0

54.2

73.0

54.2

76.1

09.1

4

3.0

0.0

0.0

08.0

010.0

014.0

010.0

014.0

02

0.0

030.0

0

56.8

057.8

061.6

065.0

068.1

06

2.2

08

1.0

07

5.0

05

8.5

04

2.8

0

12.1

91

8.2

924.3

83

0.4

84

2.6

730.4

84

2.6

76

0.9

69

1.4

4121.9

2

40

.00

60.0

08

0.0

01

00

.00

140.0

0100.0

0140.0

02

00

.00

300.0

0400.0

0

33.7

024.2

016.5

09.6

87.9

013.9

011.4

011.1

08.3

88.2

1

0.6

60.9

71.4

22.0

83.0

64.4

9

2.1

63.1

74

.65

6.8

310.0

314.7

2

95.0

41

14

.75

13

4.0

7134.5

9107.8

572.1

5

6.5

89.6

614.1

820.8

23

0.5

644.8

599999.0

0

21.6

031.7

04

6.5

468.3

1100.2

6147.1

699999.0

0

RE

SIS

.

47.2

431.8

318.2

71

0.9

89.9

09.0

07.5

3

Page 71: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-o F

IELD

CU

RVE

in

LLJ

cr

DIL

LON

57

oo

o D

IGIT

IZE

D

S fc in

LU DC

CALCULATED

DIL

LON

57

1 10

10

0EL

ECTR

OD

E S

PA

CIN

G C

AB

/2)

IN M

ETER

S10

001

10

100

1000

EL

ECTR

OD

E SP

ACIN

G

CA

B/2

) O

R D

EPTH

IN

M

ETER

S

AB/2,

m

( ft

) Ap

p. Res.

KB/2,

m

(ft

) Ap

p. Res.

DEPT

H, m

( ft

)RE

SIS.

DE

PTH,

m

( ft

)

0.91 .22

1.83

2.44

3.

3..05

,05

4.27

6.10

9.14

12.1

9

3.00

4.00

6.00

8.00

10.0

010.0

014.00

20.00

30.00

40.00

100.00

88.00

75.30

68.50

59.50

61.00

49.60

52.30

52.40

55.40

18.

24.

30.

42.

30.

42.

60,

91,

121.

182.

243.

29 38 48 67 48 67 96 44 92 88 84

60.00

80.00

100.

0014

0.00

100.

0014

0.00

200.

0030

0.00

400.00

600.

0080

0.00

61.00

45.40

35.30

22.50

31.70

21.30

16.6

013

.80

15.2

015

.60

12.4

0

0.55

0.81

1.19

1.74

2.55

3.75

5.50

1.80

2.65

3.89

5.71

8.38

12.2

918

.05

99.1

9

91

.38

6

8.3

5

41.8

5

32.2

5

41

.20

67.2

2

8.0

7

11.8

5

17.3

9

25.5

3

37

.47

55.0

1

80

.74

99999.0

0

26.4

9

38.8

8

57

.07

8

3.7

6

122.9

5

180.4

7

264.8

9

99999.0

0

RESI

S.

89.58

69.7

428

.56

9.48

8.58

16.8

120

.07

11.2

2

Page 72: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

o-e

-o F

IELD

CU

RVE

t/3

LU cr

DIL

LON

58

goo o

DIG

ITIZ

ED

75 CD

LU cr

1 10

10

0 EL

ECTR

ODE

SP

ACIN

G C

AB

/2)

IN M

ETER

S10

00

CALC

ULAT

EDDI

LLON

58

1 10

100

1000

EL

ECTR

ODE

SPACING

CAB/

2) OR D

EPTH IN M

ETER

S

AB/2, m

(

0.91

1. 1..22

.83

2.44

3.05

4.27

6.10

9.14

12.19

3.05

(

App. Res.

10.30

11.20

11.60

11.90

13.20

13.00

14.30

15.50

17.60

18.60

AB/2, m

( ft

)

App. Res.

DEPTH, m

( ft

RESIS.

DEPTH, m

( ft

)

18.29

24.38

30.48

30.48

42.67

60.96

91.44

121.92

182.88

243.84

60.00)

80.00

100.00

100.00

140.00

200.00

300.00)

400.00

600.00

800.00

15.0

014.1

016.2

017.0

016.7

016.5

018.9

019.5

024.3

020.7

0

0.5

00.7

31

.07

1.5

72

.30

3.3

74

.95

1.6

2)

2.3

8)

3.5

0)

5.1

4)

7.5

41

1.0

7)

16.2

4)

10.6

4

10.2

9

11.1

9

13.6

8

17.9

7

22.4

3

22.7

0

7.2

7

10.6

7

15.6

5

22.9

8

33.7

3

49.5

1

72.6

6

99999.0

0

23.8

4

34.9

9

51.3

6

75.3

9

110.6

5

16

2.4

2

23

8.4

0

99999.0

0

RE

SIS

.

18.4

714.7

713.6

414.4

117.3

221.9

124.2

921.8

4

Page 73: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

DIL

LON

59

LJJ

ac

.11

10

100

ELEC

TRO

DE

SP

AC

ING

CA

B/2

) IN

MET

ERS

1000

KB/2,

m

( ft

) App. Res.

AB/2,

m

( ft

) Ap

p. Re

s.

0.91

6.10

3.00

4.00

6.00

8.00

10.0

010

.00

14.0

020

.00

109.00

109.

00121.00

127.

0011

3.00

127.

0092.00

75.00

9.14

12.1

918

.29

24.38

30.4

842

.67

30.4

842.67

60.96

30.00

40.00

60.00

80.00

100.

0014

0.00

100.

00140.001

200.

00)

67.6

064

.30

70.00

72.70

65.2

054.90

74.80

53.90

26.30

Page 74: By - USGS · varies due to of rock type, clay content, porosity and the quantity and quality of the water contained in the rock. Resistivity is normally expressed in ohm-m. Within

1 Q-B

-O F

I ELD

CU

RVE

§

ll te en

LLJ

cr

.110

DIL

LON

60

o

o o

DIG

ITIZ

ED

CALC

ULAT

EDD

ILLO

N

60

en

LLJ

a:

100

1000

ELEC

TRO

DE

SP

AC

ING

CA

B/2

) IN

MET

ERS

.1

1 10

10

0 10

00EL

ECTROD

E SPACING

CAB/

2) OR D

EPTH IN

MET

ERS

AB/2,

m

( ft

) App. Res.

AB/2,

m

( ft

) Ap

p. Res.

DEPTH, m

( ft

)RESIS.

DEPTH, m

( ft

)

0.9

1.2

21.8

32

.44

3.0

53

.05

4.2

76.1

09

.14

3.0

04.0

06.0

08.0

010.0

010.0

014.0

02

0.0

030.0

0

86.3

07

5.2

07

7.0

07

9.5

07

7.8

07

7.3

07

8.3

07

8.7

077.3

0

12.1

918.2

92

4.3

830.4

830.4

842.6

76

0.9

691.4

4121.9

21

82

.88

40.0

060.0

080.0

0100.0

0100.0

0140.0

02

00

.00

300.0

0400.0

06

00

.00

82.1

089.9

091.0

087.7

092.2

072.2

056.5

041.2

040.9

034.0

0

0.6

10

.89

1.3

01

.91

2.8

14

.13

6.0

6

1.9

92

.92

4.2

86

.28

9.2

213.5

319.8

7

75.9

1

83.6

5

86.4

7

81.7

5

74.2

0

73.9

8

89.6

0

8.8

9

13.0

5

19.1

5

28.1

1

41.2

5

60.5

5

99999.0

0

29.1

6

42.8

0

62.8

2

92.2

1

13

5.3

5

19

8.6

6

99999.0

0

RE

SIS

.

115.9

1124.9

196.7

757.5

237.6

934.2

731.0

5