by - usgs · small volume percent of the total sample, was scanned visually for the presence of...

UNITED STATES DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

FINAL RESULTS AND STATISTICAL SUMMARY OF

ANALYSES OF GEOCHEMICAL SAMPLES FROM THE

MEDFRA QUADRANGLE, ALASKA

By

H. D. King, D. A. Risoli, E. F. Cooley, R. M. O'Leary,

W. A. Speckman, D. L. Spiesman, Jr., and D. W. Galland

Open-File Report 80-811 F

1980

CONTENTS

Page

Introduction————————————————————————————————— 1

Sampling and description of sample media———————————————— 2

Preparation of samples——————————————————————————— 3

Methods of analysis————————————————————————————— 5

Explanation of data——————————————————————————'—— 6

References ci ted————————————————————————————— 8

ILLUSTRATIONS

Plate 1. Map of geochemical sample localities, Medfra quadrangle,

Alaska————————————————————————————In pocket

TABLES

Table 1. Statistical summary of the analytical results for

minus-80-mesh stream sediments, Medfra quadrangle,

Alaska————————————————————————————— 9

2. Statistical summary of the analytical results for

moderately magnetic heavy-mineral concentrates,

Medfra quadrangle, Alaska—————————————————— 11


nonmagnetic heavy-mineral concentrates, Medfra

quadrangle, Alaska—————————————————————— 13


samples of ash of aquatic bryophytes, Medfra


CONTENTS—Continued

TABLES—Continued

Page

Table 5. Limits of determination used in analyses of geochenrical

samples, Medfra quadrangle, Alaska———————————— 17

6. Semiquantitative spectrographic and atomic-absorption

analyses of minus-80-mesh stream-sediment samples,

Medfra quadrangle, Alaska—————————————————— 18

7. Semiquantitative spectrographic analyses of moderately

magnetic heavy-mineral concentrate samples, Medfra


8. Semiquantitative spectrographic analyses of nonmagnetic

heavy-mineral concentrate samples, Medfra quadrangle,

Alaska—————————————————————————————— 84

9. Semiquantitative spectrographic analyses of samples of

ash of aquatic bryophytes, Medfra quadrangle, Alaska—111

Introduction

A geochemical survey was done in the Medfra quadrangle, west-central

Alaska during 1978 and 1979 as part of the Alaska Mineral Resource

Assessment Program (AMRAP). This report presents analytical data (tables

6-9) and statistical summaries of the analytical data (tables 1-4) from

this survey. Analytical results for part of the samples collected during

1978 were previously published (King and others, 1979) and are included in

this report.

This report includes analytical and statistical data for 513 <0.177 mm

(minus-80 mesh) stream-sediment samples, 370 nonmagnetic heavy-mineral

concentrate samples, 422 moderately magnetic heavy-mineral concentrate

samples, and 355 samples of ash of aquatic bryophytes (mosses).

Samples were collected from a total of 517 sites. Access to sample

sites was gained by use of a helicopter. Sample site locations are shown

on plate 1.

Sampling and description of sample media

The quadrangle is, in large part, covered by dense vegetation,

particularly along the streams. The availability of helicopter landing

sites often determined at what point along the stream the samples would

be taken. Most of the samples were taken from channels of active streams2 with upstream catchment areas averaging about nine km . Samples were

taken from first or second order streams whenever possible. Larger, or

third order, streams were sampled when landing sites along first or second

order tributary streams were not available.

Minus-2-mm stream sediment was collected for the stream sediment

samples by wet sieving at the sample sites with a stainless-steel screen.

Heavy-mineral concentrate samples were collected by panning the minus-2-mm

stream sediment to remove most of the light mineral fraction.

Samples of aquatic bryophytes (mosses) were collected from stream

channels beneath the water level mainly from the silty sides of the

stream channels but also from deadwood and boulders where they were

attached. Samples were partially washed in the stream at the sample

sites to remove large quantities of silt and sand. No attempt was made

to differentiate the various species of bryophytes which were collected.2 Lowland areas, including as much as 3,900 km , mainly in the south

and southeastern parts of the quadrangle were not sampled because they

are covered by thick unconsolidated deposits of Quaternary material

and geochemical sampling techniques that might be effective in these

areas were not within the scope of this survey.

Preparation of samples

All samples were partially dried in'the field and later completely

dried in an oven at the laboratory. After drying, the stream-sediment

samples were sieved with an 80-mesh (0.177 mm) screen and the <80-mesh

fraction was pulverized to minus 150 mesh in a vertical grinder using

ceramic grinding plates. Panned samples were sieved with a 20-mesh

(0.8 mm) screen to remove'coarse material which would not pass readily

through laboratory equipment used in the bromoform and magnetic separation

procedures. The >20 mesh fraction, which in most cases, included only a

small volume percent of the total sample, was scanned visually for the

presence of heavy minerals, and discarded. The <20-mesh fraction was

passed through bromoform (specific gravity, 2.86) to remove light-mineral

grains not removed in the panning process. Each heavy-mineral concentrate

sample was then divided into three fractions based on the magnetic

susceptibilities of the mineral grains. A fraction consisting chiefly of

magnetite was removed with the use of a- hand magnet and a Frantz—

The use of this trade name is for descriptive purposes only and

does not constitute endorsement of this product by the U.S. Geological

Survey.

Isodynamic magnetic separator. In using the separator to remove magnetite,

the samples were passed closely beneath the separator with the track

removed, the magnetic poles oriented vertically downward and covered,

and with the current set at 2 amperes. Two additional fractions were

obtained, by passing the remaining sample through the Frantz separator

at a setting of 0.6 ampere. The fraction composed of mineral grains having

no magnetic susceptibility tO'0.6 ampere is referred to in this report as

the nonmagnetic or the C-3 fraction. (The nonmagnetic fraction generally

contains most of the minerals of interest in geochemical exploration.)

Subsequent to this separation the mineralogic composition of the C-3

(nonmagnetic) fraction was determined by visual observation with a binocular

microscope. X-ray diffraction was used to verify the identification of some

mineral grains. The fraction consisting of mineral grains with magnetic

susceptibilities between 0.1 and 0.6 ampere is referred to in this report

as moderately magnetic, or the C-2 fraction. Using a microsplitter a split

of each sample of the C-2 and C-3 fraction was obtained. One split was

then pulverized to <150 mesh by hand grinding in a mortar and pestle. The

ground portion was used for spectrographic analysis.

After oven drying the samples of aquatic bryophytes most remaining silt

and sand was removed by hand and compressed air followed by several rinses

with tap water. The samples were again oven dried, pulverized in a blender,

and ashed in a muffel furnace during a 24-hour period with a maximum tempera

ture of 500 °C. The ash was passed through a 0.119 mm sieve (145 mesh) to remove

most remaining sand grains. The ash of the samples ranged from 8 to 72

percent with a mean weight of 36 percent of the dry material. The ash of

aquatic bryophytes that are free of sediment should be approximately 10

percent of the original dry weight (Brooks, 1972, p. 178). Thus, most samples

contained various undertermined amounts of sediment.

Methods of analysis

Stream-sediment and the C-2 and C-3 heavy-mineral concentrate samples

were analyzed semiquantitatively for 31 elements using a six-step emission

spectrographic method outlined by Grimes and Marranzino (1968). The

spectrographic results were reported as geometric midpoints, 1.0, 0.7, 0.5,

0.3, 0.2, 0.15, (or appropriate multiples of ten) of geometric brackets

having the boundaries 1.2, 0.83, 0.56, 0.38, 0.26, 0.18, 0.12, (or appropriate

multiples). The method was modified slightly for the concentrate samples

to eliminate spectral interferences. The modification consisted of using

half the amount of sample,. 5 mg. For samples 308-517, and 178, a 10-mg

standard was used for the 5-mg samples, and concentrations determined by

visual comparisons were doubled. Doubled values occurring between geometric

midpoints were rounded to the next higher midpoint. For samples 1-306,

except 178, half the amount of standard (5 mg) was used for the 5-mg samples

and concentrations determined by visual comparisons were reported directly.

The difference in the amount of standard used resulted in differences in

reported upper limits of determination as indicated in table 5. Stream-

sediment samples were also analyzed for gold, mercury, and zinc using

atomic-absorption (methods described by Ward and others, 1969).

Ash samples of aquatic bryophytes were analyzed for 33 elements by a

semi quantitative emission spectrographic method for plant materials

described by Mosier (1972) and modified by Curry and others (1975). These

33 elements include the elements analyzed in the sediment and concentrate

samples, with the exception of calcium, scandium, and thorium, and include

five additional elements: sodium, gallium, germanium, indium, and thallium.

Stream-sediment and heavy-mineral concentrate samples collected from

sites 1-308, except concentrate samples from site 178, and all samples of

ash of aquatic bryophytes were analyzed spectrographically by E. F. Cooley.

Sediments from sites 309-516 were analyzed spectrographically by D. A. Risoli

and J. T. Hurrell. Concentrate samples from sites 309-517, and 178 were

analyzed spectrographically by D. A. Risoli. Atomic-absorption analyses

were performed by R. M. O'Leary, A. L. Gruzensky, and G. Y. Ito.

Explanation of data

Summarized statistics based on the analytical data for stream sediments,

moderately magnetic heavy-mineral concentrates, nonmagnetic heavy-mineral

concentrates, and samples of ash of aquatic bryophytes are given in tables

1-4, respectively.

Tables 6-9 contain analytical results for <80-mesh stream-sediment,

moderately magnetic heavy-mineral concentrate, nonmagnetic heavy-mineral

concentrate, and ash of aquatic bryophytes samples, respectively. Limits

of determination are given in table 5. Symbols used in the tables are as

follows: <, an undetermined value less than the value shown was detected;

N, not detected; >, an undetermined value greater than the value shown

was detected. The symbols "S," "M," and "INST" in the element column

headings preceding the element symbols indicate the method of analysis as

follows: S, spectrographic analysis; M, INST, atomic absorption analysis.

Sample numbers, given in the tables, coincide with sample numbers

shown on the map (plate 1). The site numbers may be obtained from sample

numbers by removing the prefix M, leading zeros, and suffixes S, C2, C3,

or M. For example, the site where sample number MOOTS was collected is

indicated by a dot on the map next to the number 1.

All of the analytical data have been entered in the U.S. Geological

Survey's computerized analysis storage system (RASS).

The value of ten parts per million gold reported for semiquantitative

spectrographic analysis of sample M272S is suspect. Gold was the only

element reported in an unusual amount in this sample and gold was not

detected by atomic absorption analysis. Two additional splits of this

sample weighing 1 g and 10 g were analyzed by atomic absorption (analyses

by J. D. Sharkey) with no gold detected.

References cited

Brooks, R. R., 1972, Geobotany and biogeochemistry in mineral exploration:

New York, Harper and Row, 290 p.

Curry, K. J., Cooley, E. F., and Dietrich, J. A., 1975, An automatic filter

positioner device for emission spectroscopy: Applied Spectroscopy,

v. 29, no. 3, p. 274-275.

Grimes, D. J., and Marranzino, A. P., 1968, Direct-current arc and

alternating-current spark emission spectrographic field methods for

the semiquantitative analysis of geologic materials: U.S. Geological

Survey Circular 591, 6 p.

King, H. D., Cooley, E. F., O'Leary, R. M., Tripp, R. B., McDanal, S. K.,

and Spiesman, D. L., Jr., 1979, Spectrographic and atomic-absorption

analyses of geochemical samples from the Medfra quadrangle, Alaska:

U.S. Geological Survey Open-File Report 79-959, 43 p.

Mosier, E. L., 1972, A method for semiquantitative spectrographic analysis

of plant ash for use in biogeochemical and environmental studies;

Applied Spectroscopy, v. 26, no. 6, p. 636-641.

Ward, F. N., Nakagawa, H. M., Harms, T. F., and VanSickle, G. H., 1969,

Atomic-absorption methods of analysis useful in geochemical

exploration: U.S. Geological Survey Bulletin 1289, 45 p.

Table 1.—Statistical sumtzry of the analytical results for 513 rrrinus-QO-mesh

stream sediments, f-tedfra quadrangle> Alaska

[Qualified populacion is one in which che element concentrations are qualified by N,< , or > wherein M - not detected at lower limit of detection; <» detected-, but below lower limit of* determination; » detected, but above upper limit of determination. Unqualified population is one in which the element concentrations fall within che sensicivity limits of the method used. Leaders (—) denote no data or insufficient data. Values for Fe, Mg, Ca, and Ti are in percent; all other values are reported in parts per million. Elements analyzed by atomic absorption are identified by "AA : ' following the element symbol. All other elements analyzed by semiquancitative emission spectrographyj

Data based on the Data based on the unqualified population population

Elenent

Fe

Mg

Ca

Ti

Mn

Ag

As

Au

B

Ba

Be

Bi

Cd

Co

Cr

Cu

La

>to

Number of samples

M < >

0

0

0

0

0

490

511

511

5

0

1

5.11

513

1

0

0' 8

506

0

0

0

0

0

15

0

0

0

0

18

1

0

13

1

1

H

7

0

4

2

85

2

0

0

0'0

0

0

..0

0

0

0

0

0

0

Number of

values

513

509

511

428

511

8

2

• 2

508

513

494

1

0

499

512

512

491

0

Range of

0,7 -

0.5 -

0.2 -

0.1 -

100 -

0.5 -

200 -

10 -

20 -

50 -

1 -

700

—

5 -

10 -

5 -

20 -

_

values

20

10

20

1

5000

70

500

20

2000

2000

7

—

—

50

700

.15000

300

•_

Geontetrlc

mean

7.2

1.6

1.2 •

.8

760

3.4

320

1.4

130

940

1.3

-^

—

15

150

30

47

^^

Geometric deviation

1,5

1.6

2.2

1.4

1.7

6,8

1.9

1.6

1.7

1.5

1.4

— •

—

1,6

1,4

2.0

1,4

..

Table 1.—^Statistical summary of the analytical results for 513 minus-80-mesh

stream sediments^ Medfra quadrangle, Alaska—continued

Data b.-iycd on the Data based on Chc unqualified population

Element

Kb

Ni

Pb

Sb

Sc

Sn

Sr

V .

W

If

Zn

Zr

Th

Au-AA

H&-AA

Zu-AA

Number of dumpies

H < >

86

0

1

512

0

503

1

0

513' 1

204

0

513

503

2

0

424

0

13

0

2

2

4

0

0

1

281

0

0

5

3

0

0

0

0

0

0

10

0

0

0

0

1

0

0

0

0

Number of

values

3

513

499

1

511

7

508

513

0

511

28

512

0

5

503

513

Range of

'20 -

5 -

10 -

300

5 -

10 -

100 *

50 -

—

10 -

200 -

20 -

—

.05-

.02-

20 -

values

20

300

500

—

50

200

1500

1000

—

300

700

1000

—

20

5

500

Geonetrlc

mean

—

80

19

-*

20

29

210

270

^-»

45

260

250

—

0.6

0.08

74

Geometric deviation

—

1.5

1.6

—

1.3

3.2

1.4

1.4

— -

1.4

1.5

1.7

—

1.2

2,2.

1.4

10

Table 2.—Statistical summiry of the analytical results for 422 moderately

magnetic heavy-mineral concentrates> Medfra quadrangle3 Alaska

Data bn.sed on the Data based on the unqualified population qualified population

Element

Fe

Mg

Ca

Ti

Mn

Ag

As

Au

B

Ba

Be

Bi

Cd

Co

Cr

Cu

La

Mo

Number

N

0

0

0

0

0

383

386

420

1

0

125

405

413

1

0

0

4

374

of samples

0

0

0

- 0

0

11

11

0

23

2

160

5

2

1

1

13

21

9

,39

0

0

183

70

0

0

0

27

9

0

0

0

0

37

0

13

0

Number of

values

383

422

422

239

352

28

25

2

371

411

137

12

7

420

384

409

384

39

Range of

3 -

0.07-

0.1 -

0.1 -

150 -

1 -

500 -

20 -

20 -

50 -

2 -*

20 -

50 -

10 -

30 -

10 -

50 -

10 -

values

50

15

15

2

10000

70

5000

150

5000

10000

20 •'

200

150

300

15000

10000

2000

100

Geometric

mean

16

3.0

2.3

0.8

2600

4.4

820

55

180

3AO

3.5

41

-P

56

850

73

130

31

Geometric deviation

1.5

2.3

2.4

2.1

1.7

3.9

1.9

4.2

3.3

2.3

1.8

2.2

— .

1.5

2.9

3.0

2.6

2.0

11

Table 2.—Statistical summary of the analytical results for 422 moderately magneti*

heavy mineral concentrates, Medfra quadrangle, Alaska—continued

Data based on rho Data based on the unqualified population

Lemcnt

bl

Nb

Nl

Pb

Sb

Sc

Sn

Sr

V

W

Y

Zn

2r

Th

Number of samples Number of

values

H

72

1

3

419

0

360

118

0

400

0

172

0

402

<

254

5

26

0

1

2

128

0

12

1

113

0

5

*

0

0

0

0

4

4

0

0

0

0

0

. 22

0

96

416

393

3

417

56

176

422

10

421

137

400

15

Range

50

10

20

200

10

20

200

70

100

20

500

20

200

of values

200

- 1500

- 3000

- 1000

150

- 1500

- 1500

- 1500

1000

- 1000

- 7000

- 2000

- 3000

eometric

ean

0 0

68

110

54

340

55

130

280

350

260

85

690

230

760

eometric eviation

O T3

1.5

1.8

2.9

2.5

1,7

3.1

1.7

1.6

1.9

2.3

1.7

' 2.6

2.4

12

Table 3.—Statistical summary of-the analytical results for 370 nonmagnetic

heavy-mineral concentrates> Medfra quadrangle, Alaska

[qualified population is one in which the element concentrations are qualified by N, < , or >, wherein N * not detected at lower limit of detection; < * detected, but below lower limit of determination; > "detected, but above upper limit of determination. Unqualified population is one in which the element concentrations fall within the sensitivity limits of the method used. Leaders ( — ) denote no data or insufficient data. Values for Fe, Mg, Ca, and Ti are in percent; all other values are reported in parts per million. Analyses by semiquantitative emission spectrography]

Data based on the quail ficd population

Dnta based on the unqualified population

- Element

Fe

MSCa

Ti

Mn

Ag

As

Au

B

Ba

Be

Bi

Cd

Co

Cr

Cu

La

Mo

Number

N

0

0

0

0

0

335

357

361

2

0

10

329

365

9 .

0

16

3

352

of samples

0

1

0

>

2

0

0

0 205

0

6

3

0

16

0

305

6

2

88

1

69

8

3

1

0

0

2

35

67

0

1

0

0

0

0

11

0

Number of

values

368

369

370

165

369

29

10

7

317

303

55

34

3

273

369

285

348

15

Range of

0.2 -

0.07-

0.1 -

0. OS-

20 -

1 -

500 -

20 -

20 -

50 -

2 -

20 -

50 -

10 -

20 -

10 -

50 -

10 -

values

20

15

20

2

10000

2000

7000

200

5000

10000

300

1000

150

200

5000

20000

2000

100

Gecaetric

mean

2.5

1.2

3,8

0.5 '

600

13

1200

59

210

840

3.4

90

91

16

300

53

170

32

Geometric deviation

1.9

3,4

2.9

2.5

2.1

7.6

2.7

2,0

3.5

3.0

2.2

3.3

1.7

1.8

3.2

3.0

2.5

2.0

13

Table 3.—Statistical sumtary of the analytical results 'for 370 nonmagnetic

heavy-mineral concentrates, Medfra quadrangle, Alaska—continued

Data based on the Data based on the unqualified population qunl]_£led population

lenient

w

Nb

Hi

Pb

Sb

Sc

So

Sr

V

W

Y

Zn

Zr

Th

Number of samples

M

64

16

12

360

4

142

4

0

295

1

342

0

333

%

141

85

83

1

25

19

32

1

27

16

4

0

17

^

0

0

0

0

2

29

0

0

0

0

0

236

0

Number of

values

165

269

275 :

9

339

180

334

369

48

353

24

134

20

Rnngc

50

10

20

500

10

20

200

20

100

20

500

20

200

of values

200

- 1500

- 50000

- 15000

150

- . 1500

- 5000

- 1000

- 2000

- 2000

7000

- 2000

2000

ecraetrlc

can

o a

74

43

59

1400

31

150

470

180

220 '

150

1800

540

450

eometrlc eviaclon

0 T3

1.5

2.4

3.2

2.8

1.8

2.9

2.0

1.9

2.1

2.5

2.2

2.8

2.2

14

Table 4.—Statistical summary of the analytical results for 355 samples of

ash of aquatic bryophytes, Medfra quadrangle3 Alaska

[.Qualified population is one in which the element concentrations are qualified by N, <, or >, wherein M - not detected at lower limit of detection;<• detected, but below lower limit of determination; >- detected, but above upper limit of determination. Unqualified population is one in which the element concentrations fall within the sensitivity limits of the method used. Leaders (—) denote no data or insufficient data. Values for Fe, Mg, Ti, and Ma are in percent; all other values are reported in parts per million. Analyses by semiquantitative emission spectrography]

Data based cm the Data based on the unqualified population qualified population

•J e <y§1-1 14

Fe

«8

Tl

Mn

AS

As

Au

B

Ba

Be

Bi

C4

Co

Cr

Cu

La

Mo

Number of

H

0

0

0

0

21

322

355

0

0

0

352

51

0

0

0

0

355

samples

<

0

0

0

0

14

4

0

0

0

0

1

58

0

0

0

0

0

>

256

0

35

51

0

0

0

0

0

0

0

0

0

0

0

0

0

Numberof

values

99

355

320

304

320

29

0

355

355

355

2

246

355

355

355

355

0

Range of

3 -

1

0.1 -

500

0.1 -

200 -

—

100 -

700

2

20 -

1 -

10 -

50 -

*30 -

30 -

__

values

5-

5

1

10000

5

5000

500

7000

20

20

100

500

300

1000

200

u<*4M U41g fl§ a4) 41o a

4.3

2.1

0.3

4700

0.4

320

—

190

2300

3.3

—

2.5

45

100

125

62

— —

W G*4 OU -H 4J U«> <aa 1-1o >V 4)U TJ

1.11.3

Iv4

1.8

2.2

2.5

—

1.3

1.5

1.4

—

2.2

1.6

1.5

1.6

1.3

_

15

Table 4.—Statistical sunmary of the analytical results for 355 samples of

ash of aquatic bryophytes, Medfra quadrangle3 Alaska—continued

Data based on the Data based on the unqualified population a 1 i f I i'd i»o JM11 a l i on

«Je41

9w

Kb

Ni

Pb

Sb

So

Sr

V

V

Y

Zn

Zr

Ma

Ca

Nuraber of

N

0

0

0

355

286

0

0

355

0

0

0

0

351

samples

<

40

0

0

0

19

0

0

0

0

0

0

0

1

>

0

1

0

0

0

.0

0

0

0

0

5

0

0

Numberof

values

315

354

355

0

50

355

355

0

355

355

350

355

3

Range of

20 -

30 -

10 -

—

5 -

200

150 -

—

20 -

100 -

150 -

0.2 -

2 -

values

20

500

300

100

1000

1000

200

5000

1000

5

10

o

' *j<uS Gw ^« 4>o a

-*

79

23

—

8.3

500

410

—

56

1100

540

0.42

3.9

o ti•H 0U -H^J ^4-

ti) (96 •*0 >01 <UO 73

— »

1.5

1.3

~

2,1

1.3

1.4

—

1.4

1.4

1.5

1.7

2.3

16

Table 5.—Limits of det

ermi

nati

on used i

n analyses of

geoohemioal s

ampl

es,

Medf

ra q

uadrangle. Alaska

[upp

er limits ar

e gi

ven

In pa

rent

hese

s. Tw

o up

per

limi

ts result fr

om .di

ffer

ence

s in

techniques us

ed by

different

analysts.

Limits are

in parts

per

million

exce

pt fo

r those

given

for

Fe,

Mg,

Ca,

Tl,

and

Na,

whic

h ar

e in

pe

rcen

t. Lower

limits used in

atomlc-absorbtlon

anal

yses

: Au

, .0

5; Hg

, .02; Zn,

5. Ge

, In,

and

Tl we

re not

detected in ash

samples

of aq

uati

c br

yoph

ytes

an

d are

excluded from th

is ta

ble]

Clement

Fe Mg Ca Tl Mn Ag As Au B Ba Be 01 ca Co Cr Cu

La

> 80-mesh

stre

am

sedi

ment

.OS

.02

(10)

.05

(20)

.002

(1

)

10 (5

000)

.5

200 10 10 20

1

10 20 5 10 5 20

Ash

of

aquatic

bryo

phyt

ea

.005

(5)

.01

__ .001 (1

)

10 (10000)

.1

200 2 5

• 20 .5 1 1 5 5 1

20

Heavy-

nlae

ral

conc

entr

ates

.1 (20)

.05 .1

.005

(1,

2)

20 (5

000,

10000)

1

500 20 (5

00)

20 (2000, 50

00)

50 (5

000,

10000)

2 20 (1000)

50 10 20 (5000. 10000)

10

50 (1000, 2000)

8 9 r-i M Ho Nb Nl Pb Sb Sc Sn Sr V U Y Zn Zr Th Na Ga

> 80

-aes

h stream

sedi

ment

s

5 20 5 10 100 5 10 (1000)

100 10 50 10 200 10 (1

000)

100 -^ -,

Aah

of

aquatic

bryo

phyt

es

5 20

5 (1000)

1

50 __

5

100 5 50 10 100 10 (1000)

--

.005 2

Heavy-

nlne

ral

conc

entr

ate*

10 50 10 20

200 10 (1

00)

20 (1000,

200 20 100 20 500 20 (1000,

200 — ««•

-

2000

)

2000

)

17

Tab

le

k.—

Sem

iqu

an

tita

tive

ap

eatr

ogra

phio

an

d at

omia

-aba

orpt

ion

on

alyo

ea o

f m

inua

-80-

meo

h at

r#am

~4«

dim

ent

aam

plea

. M

edfr

a qu

adi'

angl

*.

Ala

aka

sam

ple

LA

TIT

UD

EL

ON

GIT

UO

S-f

EX

S

-MG

XS

-CA

XS

-TIX

S-M

NS

-AC

S-A

SS

-AU

$-8

S-8

AS

-8E

M001S

M002S

MOQ3S

MOOAS

MQ05S

M006S

MOQ7S

M008S

M009S

M010S

HOI IS

M012S

MOMS

MOKS

M015S

M016S

M01/S

MOI8S

MOWS

M020S

M021S

M02ZS

M02JS

M024S

M025S

M026S

M027S

M028S

M029S

MOJOS

M031S

M012S

M033S

M034S

M035S

M036S

M037S

MO IBS

NOJ9S

M040S

M041S

M042S

M043S

M044S

M045S

63

63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 6) 63 63 63 63 63 63 63 63 63

63 63 63 63 63 63 63 63 63 63 63

63 63

13 147 9

12 1 1

12 12 14 15 18 17 18 17 19

20 22 21 22

24 26 26

27

28 31 33 32 32 30 28 25 28

27

27 ** 25 26

25 2830

27 31 29 30 31

54 0 943 54

0 34 36 58 37 13 52 25 13 18 23 335

346

11 49 37 32 50 53 43 40 19 24

839 46 29 13 13 24 52 38 33

511 37 49 9

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

155

155

155

155

155

155

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

4546 54 56 55 50 51 45 40

38 32 31 28 28 24 20 26 28 20 15 531 3 6 9 3 0

56 56 52 52 45

44 38 38 39 34 30 30 17 33 23 38 30 36

49 40 46 226 516 48 45 43 49

41 52 33 55 30 19 40 50 57 30 23 56 16 17 27 30

39 45 33

145 35 142 6

37 10 35 49 246 2 9 18

10.0

15.0

7.0

7.0

7.0

7.0

5.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

5.0

5.0

5.0

7.0

7.0

5.0

2.0

10.0

10.0

7.0

5.0

7.0

7.0

7.0

5.0

7.0

7.0

10.0

10.0

10.0

10.0

10.0

20.0

10.0

15.0

10.0

10.0

10.0

1 1 1 1 1 1 1 1 1 2 5 3 5 1 1 1 7 7 5 1 1 1 1 1 1 1 1 1 1 2 1 1 1

.5 .7 .0 .0 .0 .0 .0 .0 .0 .0 .0

.0 .0 .0 .0 .5 .5 .0 .0 .0 .0 .0 .7 .5 .7 .0 .7 .5 .0 .7 .7 .7 .7 .7 .7 .0 .0 .0 .0 .5 .0 .0 .0 .5 .5

1.0

1.5 .7

1.0

1.0

1.0

1.0

1.0 .7 .7

5.0

7.0

5.0

7.0

1.0

1.0

1.5

15.0

15.0

10.0 .7 .5 .7 .7 .2 .5 .7 .7 .7 .7 .7 .7 .7 .5 .7

1.0 .7 .7 .3

1.0 .7

1.0 .7 .7 .7

1.0 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .3 .5 .3 .3 .5 .5 .3 .3 .3 .5 .5 .3 .2 .5 .7 .5 .5 .5 .5 .5 .5 .5 .5 .5 .7 .5 .5 .5 .7 .5 .7 .5 .5 .5

1/500

1/500

700

1/500

1/000

1/000

700

1/000

700

700

1/000

1.000

1/500

1/000

700

1/000

700

700

1/000

1/000

500

300

200

1/500

1/000

1/500

1/000

3/000

3/000

1/000

700

700

500

700

700

1/500

1/500

1/000

1/500

1/500

1/500

2/000

1/000

2/000

2/000

N70.0

N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N

2.0

N N N N

NSOO N N N N N N N M H N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N

N20 N N N N N N N N N N N H N N N n H H H H H H N N N N N N N N N N N N N N N N N N N N N

100

too

100

1100

1100

1

100

100

100

150

150

100

50150

170

150

1

150

1100

150 70

100

\

150

1200

150

150

150

1

150

1100

170

150

1100

300

150

150

150

150

100

200

150

200

200

200

150

150

2/000

500

700

500

/OOO

/OOO

/OOO

/OOO

/OOO

/OOO

,000

/OOO

700

300

/OOO

500

,500

/OOO

/OOO

300

300

1/000

1/500

/SOO

1/000

500

/OOO

/OOO

1/000

700

1/000

700

700

/OOO

/OOO

/OOO

/OOO

/OOO

/OOO

/OOO

,500

/OOO

/OOO

,500

/OOO

/OOO

/OOO

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.0

.5 .5 .5 .5 .5 .5< 1.0

< 1 .0

1.0

2.0

2.0

3.0

3.0

2.0

2.0

2.0

2.0

2.0

2.0 .5 .5 .5 .5 .5 ,5 .5 .5

2.0

2.0

2.0

2.0

2.0

2.0

2.0

18

Tab

le 6

.—S

emiq

uan

tita

tive

apa

otro

grap

hia

and

ato

mto

-aba

orpt

ion

an

alys

es o

f m

inua

-60-

mao

h at

reom

-aad

iman

t ao

mpl

aa,

Mad

fra

quad

ran

gle,

Ala

aka

—co

nti

nu

ed

sam

ple

M001S

H

00

2S

H

00

3S

M

004S

M

00

5S

M006S

M

007S

M

008S

H

009S

M

010S

H0

11

S

M012S

N

OU

S

NO

US

M

01

5S

M016S

M

01

7S

M

01

8S

M

01

9S

M

02

0S

M02

1S

M02

2S

M02

3S

M02

4S

M02

5S

M026S

H

02

7S

M

02

8S

M

02

9S

M

OJO

S

M03

1S

M03

2S

M03

3S

MO

US

M

035S

M056S

M

OJ7

S

HO

IBS

H

03

9S

H

OA

OS

MO

OS

M

04

2S

M

OO

S

M0

44

S

M045S

S-B

I

N700

N N N N

N

N

N

N N

N N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N .N

N

N

N

N N

N

N

N

N

S-C

Os-

coS

-CM

S-C

US

-LA

S-M

OS

-NB

S-N

Is-

sc

N N N N N N N N N N N N N N N N N N N N

•

N N N N N N N N N N N N N N N N N N N N N N N N N

20

SO 30 30 20 20 20 20 30 20 20 20 20 20 20 20 20 <S <s <5 20 30 10 <5 20 SO 30 10 20 IS 20 10 10 IS IS 20 10 20 10 20 10 20 10 20 20

ISO

100

1SO

200

150

200

ISO

ISO

ISO

1SO

ISO

ISO

ISO

ISO

ISO

ISO

ISO

150

ISO

ISO

ISO

200

100 so

150

200

ISO

100

1SO

100

ISO

ISO

ISO

ISO

200

200

ISO

200

200

200

ISO

ISO

ISO

100

ISO

100

15/000 70 70 SO SO 30 30 30 SO 30 20 20 20 20 SO 30 20 30 20 100

ISO 70 20 70

100 30

ISO

ISO SO

100 SO 20 SO 30 30

100

100

100

100 70

100 70

300

ISO

70 70 SO SO SO SO SO SO so so so so so so so so so so so so so so so30

0100 so

100 so so

100 50 so so 50 so so so so 50 so so

100 70 70 70

N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N Kl N N N N N N N N N N N N

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

SO 2010

010

0 70 70 70 7010

010

0

100 70

100 70

100

100

too 70 SO 50 ^

ISO

100 SO 20 100

ISO

100

too

ISO so ISO

100

100

100

100

100

100

ISO

1SO

ISO

ISO

100

100

too

150

200

200 30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 30 20 30 20 20 SO 30 20 30

v20 20 20 20 20 20 20 30 20 20 30

ISO SO SO SO SO

N300 N N N N N N N N N N N N N N N N N N N N N N N N N N N Kl N N N N N N N N N N N N N N N

30

20

20 20 20 20 20 20 30 20 20 10 20 IS 10 20 207 7 7

30 307 7

30 30 20 20 20 20 20 20 20 20 20 20 20 20 20 30 20 20 20 20 20

S-S

N

N100

N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

M N

N

N

N

N N

N

N

N

N N

N

N

N

N N

N

N M

N N

N

N

N

N

19

Tab

le

6.—

Sam

-qu

an

tita

tive

ap

eotr

ogra

phio

an

d at

ondo

-aba

orpt

ion

an

alya

ea o

f m

inuo

-40-

mea

h at

ream

~ae

dim

ent

sam

ples

, U

edfr

a qu

adra

ngl

e,

Ala

ska

—co

nti

nu

ed

•••pie

H001S

N002S

M003S

HOCUS

M005S

H006S

HQQ7S

P008S

M009S

M01QS

M011S

M012S

nous

HO US

noiss

nous

M017S

MOia

sMOI9S

M020S

M021S

K022S

H021S

H025S

H026S

MQ27S

n028S

H029S

M030S

M031S

H032S

n033S

M03

5S

MOJ6S

MOJ7S

M038S

M039S

M040S

M041S

MO

OS

M

044S

S-S

R

20

0

200

2CO

2

00

20

0

200

2CO

200

2 CO

200

2 CO

200

200

200

2CO

200

2CO

200

2 CO

200

200

200

200

200

200

200

2CO

200

2CO

200

200

200

200

200

2CO

200

2 CO

200

2CO

300

2 CO

SO

O

20

0

20

0

20

0

S-V 200

200

200

200

200

200

200

200

300

300

300

200

300

200

300

300

300

200

200

200

300

300

ISO

50

300

300

300

200

300

200

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

S-U

N

N N

N N N N N

N N N N N

N N N N N N N N N N

N N N N N N N N N

• N N N N

N N N N N N

N N N

70

70

SO

SO

SO

SO

SO

70

70

SO

SO

SO

SO

SO

30

30

SO

20

20

20

50

70

SO

20

SO

SO

SO

SO

SO

SO

50

50

30

SO

SO

SO

SO

SO so

so so

so

so

so

so

S-ZN

<200

SOO

<200

<200

<200

<200

<200

<200

<200

<200

<200

<200

<200

700

<200

<200

<200 N

300

<200

<200

200

<200

<200

<200

<200

<200

<20Q

<200

<200

<200

<200

<200

<200

<200

<200

200

<200

200

<200

500

200

<200

<200

<200

S-1H

1/000

1,000

300

300

300

300

200

SOO

300

300

300

200

ISO

200

1SO

300

300 50

100

100

300

200

300

300

300

300

300

200

300

300

300

300

300

300

300

500

500

300

300

SOO

200

1/000

300

200

300

S-T

H N

N

N

N

N N

N

N

N N N

N

N

N

N N

N N

N

N N N

N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N N

N

N N

N

AA

-AU

-P

.20

26

.00

N N N N

N

N

N

N N

N

N N N N

N

N

N

N N .O

SN

N

N N

N

N N

N N

N

N

N

N

*

N

N

N

N

N N

N

N2.0

0

N

INST

-MG

1.0

04.0

0.1

0.1

0.1

0

.08

.0

8

.10

.2

0

.20

.06

.0

6

.10

.5

5

.20

.06

.1

2

.08

.0

4

.10

.06

.0

6

.06

.1

2

.06

.06

.0

8

.20

.3

0

.30

.16

.2

0

.22

.1

0

.18

.12

.22

.U

.0

8

.08

.16

.1

6

.26

.0

6

.20

AA

-1N

-P

17

0

290 70 80

6S 6S

80

6S

10

0

70 80

80

70

SS

O

65 as 7S

3S

SS

O as

130

uo 90 so 95

10

0 60

120

ISO ss

100

9S

SS110 60 SS

290 90

1

60

9S

SOO 70 90

90

12

0

20

Tab

le 6

.^~

Sjm

iqnanti

tati

va o

peot

rogr

aphi

o an

d at

omio

-abo

orpt

icm

ana

lyae

a of

min

us *

SO-m

eah

atre

am-a

edim

ent

aam

plea

, H

edfr

a qu

adra

ngle

, A

laak

a

—co

nti

nu

ed

saap

l*L

AT

ITU

DE

ION

G1T

UD

S-f

EX

S

-MG

XS

-CA

XS

-TU

S-M

NS

-AG

S-A

$S

-AU

S-B

$-8

As-

ae

M046S

M047S

H04BS

H049S

HOSOS

HOS1S

MOS2S

M053S

M054S

H055S

H056S

M057S

HOSBS

M059S

MQ60S

H061S

HQ62S

M063S

M064S

H06SS

M066S

M067S

H068S

M069S

H070S

M071S

M072S

M073S

H074S

M075S

H076S

H077S

M078S

M079S

M080S

M081S

H082S

H083S

M08AS

noas

sM086S

M087S

H088S

H089S

M090S

63 32

963 33 37

63 35

34

63 33

43

63 31

58

63 34 54

63 35 10

63 34

5

63 35

14

63 34 58

63 37 43

63 37

2

63 39 53

63 39 54

63 40 18

63 41

39

63 40 32

63 39

463 43

263 37

38

63 42 48

63

5 28

63

3 48

63

6 2

63

6 0

63

2 57

63

5 29

63

3 8

63

1 31

63

0 17

63

2 29

63

0 8

63

1 15

63

2 12

63 22 16

63 24

11

63 24 46

63 27 42

63 28

763 28 15

63 24 23

63 28

163 23

8

63 23 31

63 22 23

154 42

41S4

38 11

154 38 36

154 39

1

154 26 20

154

28 22

154 21 13

154 29 12

154

16 18

154 21 18

154

12 46

154 14 32

154

9 14

154 12

28

154

20

1

154

14 42

154 26 34

154

25 43

154 33 19

154

29 28

154

29 SO

154 47 28

154 49 38

154 53

9154

51 24

1S4 55

16

154

56

0155

3 47

154 58

32

155 15 14

155

6 20

155

26

0155 19 34

155 28 26

155 26 26

155 25 54

155 23 34

155 24

9155

28 SO

155 31 43

155 35

19

155 35

6

155 34

29

155 38 24

155 38 16

7.0

1.0

7.0

1.0

7.0

1.0

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M220S

M221S

M222S

M223S

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M225S

H226S

M227S

H228S

S-S

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200

200

300

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20

0

200

200

200

200

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200

2CO

200

200

200

300

200

200

300

200

200

300

300

300

200

200

200

200

300

300

300

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300

300

300

3CO

300

3CO

300

3CO

300

3CO

300

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300

S-V 300

300

300

300

300

300

300

300

300

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300

300

300

300

200

300

300

300

300

300

200

300

300

300

300

200

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

S-W N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N

50

70

50

SO

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70

70

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300

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S-IM N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N

AA-AU-P


INST-MG

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90

80

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80 95 60110 70 80 55 9090 80 55 45 55 75 70

60

60

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65

65

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65 60 45 60 60 55 65 70 65 80

32

Tab

le d

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H240S

M241S

H242S

M243S

M244S

M245S

M246S

M247S

M248S

H249S

M250S

M2S1S

H252S

M253S

M254S

M255S

N2S6S

M257S

M258S

M2S9S

M260S

M261S

M262S

H263S

M264S

H265S

M266S

M26/S

M268S

M269S

M2/OS

M2MS

M2/2S

H273S

6363 63 63 63

63 63 63 63

63 63 63

63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 6363

63 63

63 63

63 63 63

63

63 63 63 63 63 63

63 63

S3 S3 SO

48 28

29 30

28 29

25 28

27 27

25

25

24 22

26 26

26

24

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55 55 SS SB

57

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44 12 35 12 13

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153

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154

154

154

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154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

154

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154

154

154

154

154

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154

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317

26

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369

51 29 20

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7.0

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7.0

7.0

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10.0

10.0

5.0

10.0

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7.0

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10.0

10.0

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10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

10.0

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7.0

7.0

7.0

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1.5

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3.0

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1.0

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2.0

2.0

2.0

2.0

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2.0

2.0

2.0

2.0

2.0

2.0

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1.5

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20.0

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1.5

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700

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N N N N N N N N N N N N N N N N N N N M N N N N N N N N N N N N N N N N N N N N N N N N N

S-A

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N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N M N N N M N N N N N N

N M M N M N N N N N N N N N N N N N N N N N N N M N N N N N N N N N N N N N N N N N N10 N

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300

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200

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100

200

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100

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200

200

100

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33

Tab

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6.~

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1

N

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N

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N

N

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20 30 20 20

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20

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20

20 IS 10 20 20

20 <5 20 20 <5 30

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20 20 20 30 30

30 30

30 30

30 30 30 20 20 20 20 20 20 10 20 20

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200

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100

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30 SO 30 30 10 20 20 SO 20 30 70 SO 30 SO SO SO SO 10 SO 20 20 SO 20 SO 30 30 SO SO 30 30 30 SO SO SO 20 20 SO SO SO SO SO 30 30 20 SO

SO 70 70 70 so SO SO so SO SO SO SO so so so so 70 SO so so so so SO

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100

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100

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20 20 20 20 20 20 20 SO 30 20 SO 30 30 30 30 30 30 20 30 30 20 SO 20 30 20 20 20 20 20 20 10 20 30 30 20 30 30 20 20 20 30 SO 20 20 30

N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N M N N N

20 20 20 20S

20 20 20S

20 20 20 IS IS IS 20 20 <S 20 20 10 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 IS 20 30 20

34

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200

100

100

700

150 70

100 20

100

100

100

,000

.0

,000

.0

,000

.0,000

.0

,000

.0

,500

.0

,500

.0

,500

.0

,500

.0,500

.0

1,500

.0

2,000

.02,000

.0

2,000

.0

2,000

.0

1,500

.0

2,000

.0,000

.0

,000

.5,000

.0

,000

.0,000

.0,500

.0

,500

.0

,000

.0

,000

.0

,000

.5,000

2.0

,000

2.0

,000

2.0

1,000

2.0

2,000

2.0

1,500

1.5

2,000

2.0

2,000

2.0

700

1.5

700

1.0

700

2.0

500

1.0

300

1.0

700

1.0

300

<1.0

1*000

1.0

1*000

1.0

1,00

0 1.

S

36

Tab

le 6

.—S

emiq

uan

tita

tiva

epa

otro

grap

hio

an

d at

omio

-abs

orpt

ion

an

aly

ses

of

min

ua-Q

O~m

aah

atre

om^

aadi

men

t ao

mpl

aa,

Kad

fra

quad

ron

ala,

A

lask

a

•—co

nti

nu

ed

SA

*p

l*

M27

4S

M2/

5S

M27

6S

M27

7S

M27

8S

M27

9S

N23

1S

M28

2S

M28

3S

M28

4S

M28

5S

M2S

6J

M28

7S

M28

8S

M28

9S

M29

0S

M29

1S

M29

2S

M29

3S

M29

4S

M29

5S

M29

6S

M29

7S

M29

8S

M29

9S

HJO

OS

H30

1S

M30

2S

M3Q

3S

M30

4S

H30

5S

M30

6S

M30

7S

M30

8S

M30

9S

M31

0S

M31

1S

M31

2S

M31

3S

M3U

S

M31

5S

M31

6S

M31

7S

M31

8S

s-ei N

N

N N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N N

N

<10

N

N N

N

N N

N

S-C

BS

-CO

S-C

HS

-CU

S-L

AS

-HO

S-N

BS

-NI

S-P

BS

-SB

S-S

CS

-SN


20 20

2020

20 20

20 15 20 20 2020

20

20 20

20 30 20 20 15 20 20 20 20

15 15 20 20

SO 20 30 30 20 SO 50 107

IS 157

107

10 10 10

soo

150

ISO

ISO

150

300

ISO

150

ISO

ISO

150

ISO

150

150

150

150

200

150

150

200

200

150

200

150

100

150

150

150

200

150

200

200

150

ISO

150

150

200

150

500

100

ISO

100

200

ISO

ISO

20 20

2020

20 SO 50 20 SO 30

100

100

100 70 SO SO

100 SO 30 30 20 30

30 30 20

20 30 30 30 30 30

100 SO

ISO

150

200 IS

300

'70 20

307

SO SO 30

SO 50 50 SO

SO 50

SO SO SO SO SO 50 50SO SO SO

50 SO SO SO SOSO so 50

^SO SO SO 50 SO SO SO SO so so 50 30 20 SO 30 20 SO N 30 SO 30

N N H H N H H N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N<5N N N N N N N

<20

.<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20

<20 N N N N N

<20

<20

<20

30 SO 70 SO SO

100

100 70 70

100

100

100

100

100

100

100

100

100

100

100

100

100

100 70 so 50

100 70

100 70

100

100 SO

150

150

200

100

200

200 70

150 30

100

150

100

IS IS 20 20 IS 20 20

• 15 20 20 50 30 20 20 30 20 SO 20 30 IS 20

20

20 20 15 20

20 30

20 20 20 50 20

30 30

100 IS 20

SO 30 20 10 30 20

20


30

20

20 20

20 20

20 20

20 20

20 20 2020 20 20

20 20

30

20

20 20

IS 20

20

20 20 20

30

20 20 30 20

20 20 30 20

20 30 IS 20 10 30 20 20

37

Tab

le t

.—S

emiq

uan

tita

tive

ape

otro

grap

hta

an

d at

omio

-rto

oi-p

tion

an

alye

e* of

min

ua-

SO

^aa

h e

trea

m-a

edim

ent

ean

flee

. M

edfr

a qu

adra

ngl

a.

Ala

aka

—co

nti

nu

ed

s*«

ple

H274S

M275S

H276S

N277S

N278S

H279S

H280S

H2S1S

M282S

M28JS

M2S4S

M285S

N286S

N237S

H283S

H289S

H290S

M2V1S

M292S

H293S

N294S

H295S

N296S

M297S

M298S

M299S

M300S

HJ01S

M302S

M303S

HJ04S

MJ05S

MJ06S

MJ07S

H308S

M309S

MHOS

N311S

N312S

H313S

M314S

M315S

HJ16S

M317S

H318S

S-SR

300

300

3CO

300

3CO

300

3 CO

300

3CO

300

3CO

300

300

300

300

300

3CO

300

300

200

2CO

300

200

300

2CO

300

300

300

2CO

300

200

1*500

3 CO

200

2 CO

150

ICO

150

150

150

300

200

3CO

200

200

S-V

300

300

300

300

300

SOO

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

300

SOO

300

SOO

SOO

300

SOO

200

700

200

300

ISO

SOO

300

200

S-U

N

N

N N N N

N

N

N N N N N N N N M

N N N N

N

N

N

N N N

N N

N N N N

N

N N

N N N

N N

N

N

N N

S-V

SO so

so

so

so so

so

so 70 so so

so

so

so

so so

so

so 70 so so

so 20 70 so 50 so

so 50 so so

so

so

so

so so 20 so 30

20

SO

IS SO so

so

S-1N M

N N

N N N N N N N N N

N M N N N

N<200

<200 N

<200

<200

<200

<200

<200

<200 N

<200

<200

<200 N

<200

200

<200

700

<200 N

<200

<200

<200

N<200

<200

<200

S-1H

1/000

700

300

SOO

SOO

300

300

500

500

SOO

300

300

200

200

300

300

200

200

200

200

200

200

- 300

500

150

200

200

300

200

200

300

700

200

200

200

200

150

150

200

150

300 20

200

200

200

S-IH

M N

N

N M N N

N N

N N N N

N N N N

N N N N

N N

N M N N N N

N N

N

M

N N N N N N N N

N N N M

AA-AU-P

N N

M

N

M N

N

N N

N M

N

N

N

N N

N

N

N

N N N N

VM N N N

N N

N .16

N

N

N N N

N

N N

N N

N N N N

INSI-H6

.06

.02

.06

.06

.36

.U

.12

.06

.06

.0*

.22

.10

.18

.12

.12

.08

.16

.04

.20

.24

.12

.22

.16

.10

.26

.22

.U

.26

.35

.18

.08

.18

.32

.zo

.20

.08

.06

.12

.06

.06

.10

.02

.10

.20

.10

AA-1N-P

15 SO so 45.

60

95

7S

SS 60

65 60

60 as 00 70 80

100 75 75

.80 6S 00 ao 70

7S 60

80

60

95

SS 80

40 7S

120

140

SSO

100

9S 90

65 75

35

70 7S

. 70

38

Tab

le

6.—

Sem

i quanti

tati

ve a

pea

trogra

ph

io a

nd a

tom

ic-a

bvo

rpti

on

an

aly

se a

of

min

us-S

O-m

e ah

atre

om-a

edim

ant

sam

ple a

t H

adfr

a quadra

ngle

, A

lask

a

—co

nti

nu

ed

LA

TIT

UD

EL

ON

GIT

UD

S-f

EX

S

-NG

X

N319S

H320S

H321S

H322S

M323S

M324S

M325S

M326S

M327S

M328S

H329S

H330S

M33IS

M332S

H333S

H334S

M335S

MJ16S

M337S

M333S

M339S

M340S

M34IS

M342S

H343S

H344S

M345S

M346S

H347S

H348S

M349S

H350S

MJ51S

H352S

H353S

MJ54S

M3S5S

M56S

HJ57S

HJ58S

M359S

H360S

H361S

H362S

H363S

63 63 63 63 63 63 63 63 6363 63 63 63 63 63 63 63 63 63

63 63

63 63

63 63 63 63 63 63

63 63 63 63

63 63 63 63

63 63

63 63

63 63

63 63

40

42

44 43 46

47 48

47

41 39 42

43

42 41 39 38 36 34 30

32 33 34 36 36 39 42 31 31 30

2ft

29 21 23

23 26

25 25 25 30 32 34 32 464648

23 28 20

41 23 40 490 12 21 23 20 334

15 58 352

56 32 29 40 17 5 13 25 411 8

20 32 342 0

39 13 55 13 124

34 SI5 0

49

15S

155

155

155

155

155

155

155

155

155

155

155

155

155

155

155

155

155

155

153

153

153

153

153

153

153

153

153

153

153

153

1 54

154

154

154

154

155

155

154

154

154

154

153

153

153

23 20 17 14 12 4

11 150 5 5 7 9

13 16 17 17 15 24 14 13 126 7 7 6 2 3 6 a

13 47 51 52 57 573 8

48

49 49 58 35

41 39

48 37 49

57 51 46 39 52 41 44 37 56

428

47 47 21 15 11 9

53 17 594

22 302

31 47 11 42 14 53 15 42 50 24 53 15 11 57 31 32 47 45

10. 7. 7. 7. 5. 5.

10.

10.

10. 5.

10. 5. 3. 5.

10.

10. 5. 5.

10. 7. 5. 5. 3. 5. 5. 7. 5. 5. 5.

10. 5.

15.

10.

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 010.0

5. 5. 7. 5. 5.10

.

10.

10. 7. 5. 5.

0 0 0 0 0 0 0 0 0 0 0

2 1 3 2 1 2 1 2 1 1 2 1 1 2 2 2 1 2 1 1 1 1 1 1 1 2 1 2 1 1 1 2. 1 2 1 . 1 1 1 2 1 1 2 1 1

.0 .5 .0 .0 .5 .0 .5 .0 .5 .5 .0 .5 .5 .0 .0 .0 .5 .0 .5 .5 .5 .0 .5 .5 .5 .0 .5 .0 .5 .5 .0 .0 .5 .0 .5 .0 .5 .0 .5 .0 .5 .5 .0 .5 .5

CAX

1.5 .0 .5 .0 .0 .0 .0 .5 .0 .0 .0 .0 .0 .0 .5 .5 .0 .0 .7 .0 .s .0 .5 .5 .0 .0 .5 .5 .0 .0 .7 .5 .5 .7 .7 .3 .S .7 .7

1.0 .0 .5 .5 .5 .5

S-TIX

>1.0

i.'o

>1.0

>1 .0

1.0

1.0

>1 .0

>1 .0

1.0

1.0

>1.0

i.'o

1.0

>1.0

>1.0

>1.0

i!o

1.0

1.0 .7

>1.0

> 1 .0

>1 .0

1.0

1 .0

>1.0

ilo

>1.0

>1 .0

1.0 .7

>1 .0

1.0

1.0

>1.0

1.0

>1 .0

1.0

>1 .0

>1.0

1.0

1.0

>1 .0

>1 .0

>1 .0

S-MN 500

500

700

500

500

700

1,000

1,500

700

1,000

700

500

500

500

700

700

500

500

500

1,000

700

1,000

700

1,000

700

700

700

700

1,000

1,000

700

700

3,000

>5,000

500

1,500

2,000

500

1,000

700

700

>5,000

1,000

500

500

S-AC

N .

N N N N N N N N N N N N N N N N N N .

.7 N<. 5 N N

<.5

, N N N N N N N N N N N N

<.S

N N N N N N N

S-AS N N N N N N N

•N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N

S-AU

N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N M N N N N N N N N N N N N N

s-a 70 70 70 70 70 70 50

50

100 70

150

100

100

100

100

100

100

100 70

300

150

150 70

70 70

100 50 70 N N

300

700

200

150

100

150

500

100

100

100

100

150 70 70

100

S-BA

S-BE

1,000

700

1,000

700

700

700

1,000

700

700

700

1,000

700

700

,000

,000

,000

,000

,000

,000

700

700

700

700

700

700

700

<700

700

700

700

700

1,000

1,000

1,000

700

700

1,000

700

700

700

700

1,000

700

700

700

.0

.S .0.0 .0

.0.0.0 .0 .0 .0 .0 .0

.0 .0 .0 .0

.0 .0

.0 .5 .s .0

.0 .0

.0

.0

.0 .0 .0 .0

.0 .0 .5 .0 .0 .5 .0 .0 .0

.0

.5 .0

.0

.0

39

Tab

le

6.—

Sem

iqu

a>it

itat

iv#

apeo

trog

raph

io a

nd a

tom

io-a

baor

ptio

n o

nal

yaea

of

min

ua-8

0-m

eah

atr*

tom

~4ed

imen

t ao

mpl

ea,

Hfd

fra

quad

i-an

yla

t A

lask

a

•—co

nti

nu

ed

sa*pl«

M319S

M320S

M321S

H322S

M323S

H324S

M325S

M326S

H32/S

N328S

H329S

M330S

M331S

M332S

M333S

H334S

N3J5S

N336S

M337S

M338S

H33

VS

M

34Q

S

HlU

S

HU

2S

H

343S

H344S

H345S

H346S

M347S

H348S

S-BI

S-CO

S-CO

S-CR

s-cu

S-LA

S-HO

S-NB

S-NI

S-PB

S-SB

S-SC

H350S

M

351S

H

352S

M

353S

H35

4S

H355S

M

356S

H

357S

H

358S

M35

VS

M

360S

H

361S

M

362S

H

363S



10 10 10 10 10 10 10 10 10

10

10 7 7

1010

10 7

15 IS 10 7 5 s 710 10 10 10 10 10

715 IS 15 10 10 107

10 10 710 10 7 7

ISO

100

ISO

too

100

ISO 70

100

ISO

100

200

100

ISO

ISO

150

200

200

100

150

100

100 70

100

150

ISO

ISO

100

300

200

200

100

300

150

150

ISO

ISO

100 70

150

200

150

100

100

150

ISO

SO 20 20 50 JO 30 IS 20 30 30 30 20 20 SO 20 30 20 30 30 20 IS 107 10 IS 20 IS IS 20 IS 10

100 30

ISO 10 15 50 20 30 30 20

100 30 20 20

SO 30 30 SO SO SO SO SO SO SO 50 20 50 SO 30 50 30 SO SO 70 2010

010

0 20 30 30 20 30 50 70 SO SO SO 70 SO

200 30 20 30 SO

100 SO 30 SO 30

N N N<S N N

<5 N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N

<20

<20 N

<20 N N

<20

<20

<20

<20

<20

<20 M

<20

<20

<20

<20

<20

<20

<20

<20 20

<20

<20

<20 N N

<20

<20

<20

<20

<20

<20

<20

<20 N

<20 N N

<20 N N N N

<20

100 70

100 70 70 70 SO 50 100 70

100 70 SO

100

100

100 70 70 100 SO SO 30 30

i SO 70 SO 70 70 70 70 SO

200

ISO

200 70

100

ISO

100

ISO

100

100

ISO

100 70 70

10 10 20 20 10 15 30 20 IS 20 20 IS 10 20 IS 10 10 20 10 IS 10 10 10<10 20 20 10 IS 20 IS 20 20 IS 20 10

00 10 20 20 20 IS 20 15 1S 10

N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N M N N N N N N N N N

SO

20 20 20 20 20 20 20 20 20 30 20 20 20 20 20 IS IS 20 IS IS IS 20 20 20 20 20 20 20 20 20 30 JO 10 20 20 20 20 20 20 20 20 20 20 20

S-SN

N

N

N

M

N N N N

N

N N N N

N

N N N

N N

N N10 N N N N M

N N N

N

N

N N N

N

N

N N IS N

N

N

40

Tab

le

6.

apeo

trog

raph

ia a

nd a

tom

io~<

ibao

rptio

ti at

ialy

aaa

of

—'C

onti

nued

atre

om-a

edim

ent

aoin

plea

, H

edfr

a qu

adrc

otjl

a,

H319S

M320S

N321S

M322S

M323S

M324S

M325S

M326S

M327S

MJ28S

MS29S

M330S

M331S

M332S

H333S

M334S

H3J5S

H336S

M3J7S

M318S

M339S

M340S

M341S

M342S

M343S

N344S

M345S

M346S

M348S

N349S

H3SQS

MJ51S

MJ52S

MS53S

M35<.S

N3SSS

H3S6S

M357S

M358S

H359S

. M360S

M361S

M362S

M363S

S-S

R

300

200

300

200

200

2CO

3

00

500

ISO

150

200

200

20

01

50

20

0

150

100

2CQ

1

50

150

150

2 CO

30

0 30

0 2

00

15

030

0 3C

O

20

0

300

150

100

100

15

01

00

100

100

ICO

1

50

150

10

0

150

200

2CO

2

00

S-V 20

0200

300

30

02

00

20

03

00

30

030

02

00

50

02

00

30

03

00

30

0

30

02

00

30

03

00

150

150

150

15

02

00

20

0

20

02

00

20

0150

200

15

01

,00

030

03

00

20

0

20

03

00

20

030

030

0

30

03

00

200

200

20

0

S-U N

N

N

N

N N

N

N

N N N

N N

N

N N

N

N

N

N N

N

N

N

N N

N

N

S-l 50 50 30 50 50 50

30

50

50

SO 50 30 50 50 50 50 30 30 50

100 70

100 30 30 50 30 30 50 50 30 50 30

30

0 50 30 50 30 30 50 30 30 50

50

50

50

S-1

N N

N

N N

<2

00

<2

00

<

20

0

<200

<2

00

<

200

<2

00

<

20

0

<2

00

<

20

0

<2

00 N

N

<200

N<

20

0

<20

0 <

20

0 N

<200 N

<2

00

<2

00 N N N

<2

00

<200

200

30

0<

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500

300 70

1,000

500

200

300

300

200 50

200

1,500

1,500

2,000

>2,000

>2,000

S-B

A 200

$00

700

500

1x000

300

SO

300

300

300

500

300

1,000

SOO

500

SOO

500

700

300

700

SOO

300

SOO

500

500

300

300

500

SOO

70

0

SOO

30

0 20

0 300

SOO

1,0

00

SO

O

700

300

500

200

500

300

300

200

57

Table 7.—Semiquantitativa spectrographic a

nalyses of moderately

magnetic h

eavy

-min

eral

co

ncen

trat

e samples, Medfra q

uadrangle, Alaska

—continued

s*»ple

M04

6C2

M04

7C2

M04

8C2

M04

9C2

M05

0C2

H05

1C2

M05

2C2

MO

SJC

2 H

054C

2 M

055C

2

M05

6C2

H05

7C2

M05

8C2

M05

9C2

M06

0C2

M0

6U

2

H06

2C2

M06

JC2

M06

4C2

H06

5C'2

M06

6C2

M06

7C2

M06

8C2

M04

9C2

MQ

70C

2

H07

1C2

M07

2C2

H07

4C2

M07

5C2

M07

6C2

H07

7C2

M07

8C2

M08

0C2

M03

1C2

M08

2C?

M08

JC2

MO

84C

2 M

085C

2 M

086C

2 M

087C

2

N08

8C2

M08

9C2

M09

0C2

M09

1C2

M09

2C2

S-8

C 5 7 3 3 <2 <2 N N 2 N 5 <2

5 3 <2 <2 <2

<2 N 2 N

N

N

N

N 2 N N

<2N N

N

N

N N N N N

<2

<2

7 S 5 2 2

s-ei N N N N M N

N

N

N

N N

M

N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N N

N

N

N

N

$-co

s-co

\N N N N N N N N N N N N N N N N N N N M N N N N N N N N N N N N N N N N N N N N N N N N N

70 70 70 70

70 SO

70 70 70 70

100

100

100 70 SO

70

SO70

IS 70 SO SO

70 70 70 SO 70 70

70 70 70 70

70 70 70 70

70 70

70 70 SO 70 SO 70 SO

S-C

R

3,0

00

700

1,0

00

S,0

00

>S

,000

1,5

00

70

03

,00

0

SOO

2,0

00

SOO

700

200

700

SOO

2,0

00

70

0 70

0 SO

O

700

SOO

1

,00

0

700

700

SOO

70

01,0

00

70

07

00

700

700

700

3,0

00

2,0

00

>S

,000

>S

,000

>S

,000

3,0

00

1,5

00

5,0

00

1,5

00

3,0

00

2,0

00

2,0

00

2,0

00

S-C

U SO

200

100

10

0

300 20

10

01

00 70

10

0

700

SOO

SOO

200

100 70 10 20 20

300

too

100

100

100 SO

100

100

100

100

100

100

ISO

200

100

100

ISO so

100

100 70 too

100 so

100

100

S-LA

S-MO

S-NB

SOO

ISO

200

200

300

100 SO

200

ISO

too

SO70

0 SOSOO

1,000

700

SOO

300 50

~1,000 SO

700

700

200

ISO

200

300

200

100

200

300

200

200 SO

200

200

ISO SO SO SO

100 SO SO SO so

N M N N to•

N<10 N N N

30 N

20

00 N

10 N N N N' N N N N N N N N N N N N N N N N N N N N N N N N N

<SO

<SO

<SO

<SO SO

<50

200

100

<SO SO

<SO SO

<50 SO

<50

<SO

<50

<50

<SO

<SO

<50 SO

<SO SO

<SO SO SO 50

<50

<SO

<SO

<SO

100

100

<so

<so

<so

<so so <so

<so

<so

<so

<so

<so

S-NI 70

ISO

ISO

ISO

200

100

100

100

100

ISO

200

200

200

ISO

100

100 SO

70

30ISO SO

100

1SO

100

100 70

100

100

100

100 70 SO

ISO

too

ISO

ISO

100

100

100

200

100

ISO

ISO

ISO

100

S-P8

100

200 70 SO

200

20 20 20 20 20

SOO

,000

700

ISO

100

100 SO

SO

3010

0 SO

20

20

20

<20 20 100 30 20 20 20 20

100 20 20 20 20 20 20 20 30 20 20 30 20

33X33 Z33XZ XXXZX XXXXZ X3ZX3 3 Z X 3 Z XZXXX Z X X X X ZX3Z3OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO I*

IV iv rv iv rv rwrvrvrvrv rvruivrvrv iv iv M iv »v rv rv iv rv fv rv' »v iv rv IV IV rv fw iv rv rvrvrwiviv rvtvrvrvrv <~

ZZZZZ ZZZZZ ZZZZZ ZZZZZ ZZZZZ ZZZZZ

O O O O O w* O ^" w* *^ O *^ *^ w* *^ w1 M^ *^ wi \A i/rf f* wi w U4 W4 wi O vt O OOOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO o

O1 ID

OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO

OOOOO OOOOO OOOOO OOOO O O O O OOOOO OOOOO OOOOO Mooooo ooooo ooooo zoooo zozzo ozzzo ooooo ooooo ooooo z

OvxOOO OOOOO OOOOO OOOOO ODODO OOOOO OOOOO O O O O -J ODOOO OOODO ODOOO OODOO OOOOO OOODO OOOOO OOODO OOOOO DOOOO

ZZZZZ ZZZZZ ZZZZZ ZZZZZ ZZZZZ ZZZZZ ZZZZZ ZZZZZ ZZOZZ

»A AA A AAAAAAA •*£!.MMfvt/iO fv iv iwrv Mivfwrwktf lv^>>bnlwu• tvN»fv fv rv^fw «wiv «w«wfv »v fwivwi I g"ooooo o o oo ooooo ooooo ooo o bo oo ooo o ooo tf> 5 ooooo zozzz z o z o o ooooo ooooo poozo oozoo ooozo ooozz « c

OOOOO OOOOO OOOOO OODOO OOOOO OOODO OOOOvt OOOOO OOOOO <: O OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO ._

ZZZZZ ZZZZZ ZZZZZ ZZZZZ ZZZZZ ZZZZZ 0s5

ZZZZZ ZZZZZ ZZZZZ ZZZZZ ZZZZZ OZZZZ ZZZZZ ZZZZZ

Tab

le

7.—

Scm

iquanti

tati

ve

apea

trog

raph

ia a

naly

aea

of

mod

erat

ely

mag

neti

c he

avy-

min

eral

co

ncen

trat

e oa

mpl

ea,

Med

fra

quad

rang

le,

Ala

aka—

cont

inue

d

sa

mp

leL

AT

ITU

DE

LO

NG

ITU

DS

-FE

XS

-HG

XS

-MN

S-A

GS

-AS

S-A

US

-BS

-BA

M093C2

H094C2

H095C2

H096C2

M097C2

MQ98C2

M099C2

M100C2

H101C2

M02C2

M103C2

Ml(HC2

H105C2

N106C2

M107C2

H1Q9C2

HI 1U2

HI 12C2

K1 ISC^

M1UC2

M115C2

H116C2

M118C2

M1 1VC2

H121C2

M122C2

H123C2

H12CC2

M125C2

N126C2

M127C2

H128C2

H129C*

HUOC2

H131C2

M132C2

H153C2

HI HC2

H155C2

H136C2

H137C2

N138C2

HHOC2

H141C2

NI42C2

63 18 10

63 19 35

63 17

263 21 41

63 16 56

63

1 50

63

0 47

63

0 40

63

3 1

63

2 59

63

5 20

63

5 3

63

4 53

63

7 24

63

9 17

63 12 44

63 13 13

63 13 48

63 12

56

63 20 24

63 16 49

63 20 41

6} 20 23

63 17

47

63 22

36

63 23 48

63 26 43

63 26 23

63 28 13

63 26 13

63 29

963 26 10

63 29 42

63 25

52

63 52

47

63 29

663 51

50

63 29 18

63 51 36

63 29 14

63 54 26

63 29 26

63 56 17

63 59 IS

63 52

26

155

30 40

155

22 26

155

37 50

155

21 13

155 42 IS

155 31

44

155

40 25

155 49 28

155

51 42

155

54 52

155

48

8155 56

8155

52 12

155 57 52

155

57 18

155

49 28

155 59

44

155

45 16

155 42 29

155

55 46

155

58 22

155 46 43

155

46 33

155

40 55

155

49 39

155

45 45

155

47 12

155

42 31

155 44

59

155 42

31

155

57 50

155

59 34

155

46 23

155

59 37

155

9 15

155

S3 23

15S

7 54

1SS S3

52

1SS

3 28

1SS

37

S

1SS

3 S

155 37 10

1SS

3 32

155

S 7

1SS

16 46

20

20 20 20 20

20 20S

IS 20

2020

2020

20

20

2020

' 20 20

20

20

20 20

20 15 20 IS 20

20 15 20

20

20

IS 15 20

20

20

20

20 20

20 IS 20

S.OO

3.00

S.OO

S.OO

S.OO

5.00

5.00

1.00

S.OO

S.OO

S.OO

5.00

7.00

7.00

S.OO

S.OO

S.OO

3.00

7.00

3.00

5.00

1.50

3.00

3.00

S.OO

5.00

3.00

.S.OO

2.00

S.OO

2.00

7.00

S.OO

5.00

7.00

3.00

S.OO

7.00

3.00

1.SO

S.OO

2.00

S.OO

S.OO

S.OO

3.0

1.0

3.0

2.0

1.0

3.0

2.0 .7

2.0

3.0

2.0

S.O

7.0

7.0

7.0

S.O

7.0

2.0

3.0 .7

S.O .1

2.0

1.5 .2

3.0

2.0 .2

3.0

2.0

2.0

2.0

1.0

10.0 .S

2.0 .S

S.O

2.0 .2

2.0

1.5

S.O

S.O

2.0

>t.OO

>1.00

>1.00

>1 .00

1.00

1.00

.50

>1.00

>1.00

>1.00

>1.00

>1.00

>1.00

1.00

>1.00

1.00

>1.00

1.00

1.00

>1.00

>1.00

.70

.50

>1.00

>1.00

>1.00

>t.o

o.70

>1.00

.50

1.00

.20

.70

>t.OO

1.00

>1.00

>1.00

>1.00

>1.00

.30

^~ >1.00

.50

>1.00

>1.00

>t.OO

5/000

3/000

3/000

>S/000

2/000

5/000

5,000

1/000

5,000

>S/000

>S/000

>5/000

>S/000

5,000

>S/000

>5/000

5,000

5,000

5,000

5,000

3/000

1/500

1/500

5,000

1/500

3/000

>S/000

5,000

5/000

3/000

3/000

1/500

>S/000

3/000

2/000

>S/000

3/000

5,000

>5/000

1/500

5/000

5,000

S/000

2/000

2/000


S.O

N N N N N N N N N N N N N1.0

N N N N N N N N N30.0

N1.0

N N N


N N N M N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N

1/500

500

700

1*000

1*000

100

too 50

100

100

100 70

70 too

2,000

>2/000

1,000

700

200

1/000

SOO

500

300

SOO

SOO

1/000

SOO

200

300

200

200

200

SOO

300

<20

1/000

SO

SOO SO

>2/000

200

SOO SO 20

20

200

200

SOO

300

SOO

300

700

300

300

300

SOO

300

300

200

200

SOO

200

300

200

1/000

200

SOO

700

300

SOO

200

700

300

300

SOO

200

SOO

300

700

100

300

200

200

SOO

200

200

300

300

100

300

60

Tab

le

7,—

Sam

iquanti

tati

ve

apeo

trogra

phio

an

alyi

teft

of

mo

der

ate

ly m

agne

tia

hea

vy-m

iner

al

aonoen

trate

oa

nple

*,

Med

fra

quad

i'ang

le.

Ala

eka

—co

ntin

ued

saap

t«

M093C2

M094C2

M095C2

M096C2

M097C2

M098C2

M099C2

M100C2

M1Q1C2

M102C2

M1Q3C2

M104C2

M105C2

M106C2

M107C2

M109C2

M111C2

M112C2

Ml 13C2

M1 UC2

H115C2

NI16C2

Ml 18C2

Ml19C2

MI21C2

M122C2

M123C2

MI2CC2

M125C2

M126C2

M127C2

M128C2

M129C2

M130C2"

M131C2

M132C2

MlJJC2

MI34C2

MlJ5C2

M136C2

M137C2

MI38C2

HUOC2

MUIC2

M142C2

S-BE

<2N N N N

20 2

<2N

N N N N N N S N N<2N

<22 3

<2

<2

2 <2N

<2

<2

3<2N 2 N

<2 N 2 N 2 N 2 M N N

S-BI N

N

N N N N

N N

N

N N N N N N

100 N N N N N N N

N N N N N N N N

N N N N N

N

N

N

N N

N N N N

S-CO

S-CO

S-CU

S-LA

S-MO

S-NB

S-NI

S-PB

N N N N N N N N N N N N N N N N N N M N N N N N N N N N N N H N N N N N H N N N N N N N N

70 70 70 70

100 SO70

20 70

70 70

SO 70 70 70 50 70

70 70

70 70

SO 70

7070

50 50 70 70 70 50 50 .70

70

100

70 70 70

70

20

70

SO70

70 70

1/500

1/000

5/000

1,500

>S/000

500

700

100

700

3/000

1/000

>S/QOO

5,000

>S/000

>S/QOO

1/500

>s/ono

2/000

2/000

5/000

>s/ooo

>s/ooo

5/000

>S/QOO

>s/ooo

3/000

5/000

5/000

>S/000

3/000

700

1/000

5,000

2/000

1/SOO

700

SOO

SOO

SOO

SOO

1/000

5/000

700

700

700

100 SO

ISO

1SO

ISO 10

100 20 SO SO

100

100 30 30

ISO

ISO

100

100

100

150 70

ISO

150 SO

100

100 30 30

200

100 50 SO SO 70 20 SO SO SO 70

200 SO

ISO

100 20

100

100

200

200

ISO

SOO

SOO

200 SO

100

200

200 SO

ISO SO SO

200 SO

SOO

300

300

500 SO

100

1/000

>1/000 SO

300

70

200 70

200 SO

ISO 70SO

ISO SO

100

100

100

100 so so so so

N N N N N N N N N N M N N N N N N N N N •N N N N N N N N N N N N N N N N N N N N N N N N N

<50

<SO

<50 SO

<SO

<SO

<SO

<SO

<SO

<SO

<50

<SO

<50

<SO SO

00 SO

<SO

<so

<so

00 <so

<50

00

<50

00

00

00

<so

00

<so

<50

<50

<SO

00

<50

00

<so

00

00

<so

<so

<50

oo

00

100

70100 70

200

20

100 30

100

100 70

100

150

200

200

100

200

1SO

100

ISO

100

200

150

100

200

ISO 70 70

ISO

100 SO

200 70

200

200 SO SO

7070

100

100

100

ISO

100

200

20

20

20

20

20

20 20

<2020

20

2020

20

20

100

1*000

ISO

700 20SO

20 SOSO

<20 30

2020

<20

200 SO 20

30

SO

SO

20

2020

20SO

200

20

10020

20 SO

61

XXXXXX X X X 2X X X X X

c o o o oXXXXX X X X X X— — -o o ooooo o o o •* o <e«-o<e<of\j — O O OC -g O- k/> /^ t"

rv iv iv ivIV IV «V «V IViv iv *v »v »v iv iv iv fv fw iv rv fv «v «v iv iv rv iv fv rw iv >v rv iv iv >v rv iv iv iv iv rv rv rv *•

z z z z z z z z z z z z z zz z z z z

O O O t" O fu -w O O O •* w> ««i w O ts> i» «S> U» «•! «s> O M btf *w -J O -w O O OOOOO o ** •* ** ->J «J O O *» «J VI OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO «"»

oo

z o zo02o x x x o

o o o z o z z

IV IV IV IV

o o o o ooozo

o o z o z z o

A AIV IV

o o z z z o o

(Arvrwo o

z z z o o

rv rv rv rv tv iviv rvivOOOOO OO OOOOOOO OOZOO

A Arv rv rv IO O O

X O O X Ov>

.2ro

OOOOO OOOOO

OOOOO OOOOO

OOOOO OOOOO

OOOOO OOOOO

o o o ooOOOOO

OOOOO OOOOO

OOOOO OOOOO

OOOOO OOOOO

«S> V •«•» IV l* OOOOO OOOOO

OX X XXX X X X XXXXXXXXXX

O -4 »/l O V OOOOO

-»-».*.• IV —OOOfvO rvkMOivOOOOOO OOOOO

W* O O f O O w* ^ O OOOOO OOOOO

IV IV -» -»

OOOOO OOOOOO O rv O O OOOOO

o o f> -X -w

V OO OOX X OX

oO Z Z X Z

o oX O O Z Z

IV% A AO *» V>o o o

z o o o zOOOOO OOOOOOOOOO

o o o oOOZOO

OOOOO *• OOOOO X

OOOOO OOOOO

-*«^lOMO M tX O IVVXW>«XOOOOO -w O O -w O O O O O *JOOOOO OOOOO OOOOO

O O -w w> O OOOOO

OOOOO OOOOO

OOOOO OOOOO

OOOOO OOOOO

-W -J m O »V OOOOO OOOOO

XXXXXxxxx xxzxzXXXXX

X 3 X X X X X X X X X Z X X Z X X X X X X X X X X X X X X X X X X X X X X X X

^ OD OD OP OD OB Oft Co Ct ^ *v "^ ^ ^ ••»( o* O* O* O* 0* O* ^ 0* ^ ^ \t ^ fc

>v fv rv rv fv rw iv M fv iv iv isJ iv r« iv r\» iv iv iv iv iv iv rw iv iv iv iv iv >v iv iv iv iv iv iv iv iv iv rv *v M iv iv iv M *•

Q*^^^^ Ô^ÔÔ^ O^Ô^Ô^ OÔÔÔ'^ O'OÔÔ1^ ^^0*0*0* Ô^ÔÔ^ OÔÔÔ^^ OÔÔÔ^^

O

U)

O«S>OOk/i O O O O O O O O O O O O O O O O O O O O O O O O O fWtri«s>W<O O O O O O O O O O O •- O O O O O O O O O O OOOOO OOOOO O O O O O O O O O O O O O O O O O O O O O OO O O X

V V

OOOOO OOOOO OOOOO OVQOO OOOOO OOOOO O O vn l/i O VÔOOO OOOOOOOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOOOOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO

Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z

o >Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z O Z Z Z Z Z Z Z Z Z Z Z Z Z tA

ZZZ Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z

OOOOO O O O iv O Ot*ODt* OOOOO vOOO«w O O O -rf «w Otfl*wt* O*wv»«wN> fvfvOtAt* OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO OOOOO

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63 41

63 27

63 38

63 36

63 40

63 40

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200

200

500

300

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150

100

500

300

150

200

200

Tab

le 7

.-- S

cmiq

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tita

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tp

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an

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100

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200 30 SO SO SO 20 30 20 20 100 30 SO

ISO 30 30

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3/000

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70

Tab

le

7. —

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M279C2

M280C2

H281C2

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M295C2

M296C2

M300C2

M302C2

M303C2

M304C2

M305C2

M306C2

M309C2

M310C2

M311C2

M312C2

M313C2

M3UC2

M315C2

M316C2

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S-SB N N

N N N N

N N N N N N N

N N N N N N N N N N N N N N N N N N N

N200 N N N N N N N N N N N

s-sc 20 50

70

50 50 50 70 70 70

100

100 50

30

70 70 70 70 50 50

100

100 70 70 50 50

30 30100 70 70 too

too

100 15 50 30 70 50 50 50 50 70 30 30 30

S-SN

S-SR

N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N200 N

100 N N N N N N N N N

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200

300

300

300

300

300

300

200

200

200

200

200

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200

200

200

300

200

300

300

200

200

1,000

200

300

300

500

300

300

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300

500

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300

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300

300

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500

300

200

500

500

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300

300

500

500

500

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300

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500

500

300

100

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300

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N N N N

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100 70 70 70

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. N N N

N

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7\

Tab

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7.—

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an

tita

tiva

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an

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H326C2

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M342C2

M343C2

M344C2

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M350C2

M35U2

H352C2

MJ53C2

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M355C2

M356C2

M357C2

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H360C2

H364C2

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63 44

63 43

63 46

63 48

63 47

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63 39

63 42

63 42

63 32

63 33

63 34

63 36

63 36

63 39

63 42

63 31

63 31

63 30

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63 47

63 47

63 50

63 50

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63 56

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0

500

300

500

200

300

300

300

15

0500

200

72

Tab

le

7.—

S&

riq

ua

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tati

ve

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hio

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alye

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M3OC2

M342C2

H3A3C2

H344C2

M345C2

M346C2

M3C7C2

M348C2

M349C2

M550C2

M35U2

H3S2C2

M3S3C?

M354C2

M355C2

H3S6C2

M357C2

M359C2

M360C2

H36CC2

M365C2

M366C2

M367C2

M368C2

H369C2

M370C2

M371C2

M372C2

M373C2

M374C2

H37SC2

M376C2

M377C2

S-BE

S-B1

S-CO

S-CO

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2<22 <2 20 20 to 2 3 <2

S<2 <2 N <2 <2 <23 2 3

<27 2 <2 <2

2 7 S S<2 202 3 S 2 <2 3 <2 2 <2

N N N N N N N N N<20 30 N N N N N N H N N N H N N H H N N

<20

<20 H H N N N

- N H N H N H H H

. N N

N N N N N N N N N N N<SO N N N N N N N N N N " N N N N N N N N N N N N N N N N N H N N N N

70 SO

100 so 100 so so so 30 N 10 20 20 SO SO 30 SO SO SO SO IS 70 70 30 30 20 SO SO IS 10 30 too 70 SO 30 30 SO so 30 SO SO 70 70 70 70

s-c«

1/000

700

1/500

ISO

700

200

1/500

7/000

7/000

150

150

700

1/000

2/000

t/SOO

1/000

1/500

1/000

700

1/000

150

3/000

7/000

I/ 500 300

2/000

700

10/000

1/000

300

500

500

1/500

10/000

1/000

700

300

1/000

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ISO

200

200

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1/000

SOO

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to 10 10<1

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0 SO 1S 20 20 20 SO 20 10 SO20

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too SO 20 too

150 SO too 70 20 SO 20

200

ISO

N 70<SO SO SO

200

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100

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700

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, 1/

500

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200

300

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000

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200 SO SO 70 SO SO

200 SO SO SO

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70 70

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too N N

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100

200

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S-N1

200 70

300 20

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100

100 10 30

SO

100

100 70

ISO

100

ISO

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ISO

200

ISO

ISO 70

ISO

300 70

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ISO

SOO

200

ISO

SO

ISO

200

ISO

200

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ISO

200

200

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100

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100

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200 20 30SO

300

30

30

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30

SO

30

70

20

50

20

SO

SOO

70

100

SO

300

70

10020

SOO

100

SO

300 70 20

100

20

ISO

100

73

Tab

le

7.—

Sem

iqu

an

tita

tive

spe

otro

grap

hio

an

aly

ses

of

mod

erat

ely

mag

nati

o he

avy-

min

eral

oon

oent

rate

sa

mpl

es,

t<ed

fra

quad

rang

le.

Ala

ska—

cont

inue

d

sam

ple

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M322C2

M323C2

M325C2

M326C2

M327C2

M32BC2

H329C2

M331C2

M33BC2

MJ39C2

M3<,OC2

H3UC2

M3A2C2

N343C2

H344C2

M34SC2

M346C2

H347C2

H34BC2

M349C2

M350C2

M351C2

M352C2

M353C2

MJ5AC2

M35SC2

(135

6C2

M357C2

M359C2

M360C2

M364C2

H365C2

M366C2

H367C2

H368C2

M369C2

H370C2

M371C2

H372C2

M373C2

M37AC2

M375C2

M37&C2

M377C2

S-S8 N N N

N N N

N N N N N N N N

N N N

N


N N N N N N N N N

s-sc

S-SN

S-SR

S-V

30 70 SOSO

SO IS 70 30

30 30 30 30 3030

SO

SO

70 SO

30 SO

.

30 70

30

SO

30 SO 30 SO 30 70 70 30

30 SO 70 SO 70

100

20 30

30 30

ISO 30

70

N N N N N N N N100

100

ISO

ISO N N N

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70N

100 N

SQO N N N N N N N N N N N N N N N N

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N<200 N N N

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<200

700

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200

300

300

200

300

200 N

200 N

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200

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300 N

300

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150

1,000

300

1,000

200

100

200

300

ISO 70

100

ISO

ISO

300

200

200

300

200

200

200

100

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300

300

200

300

200

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200

200

300

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300

300

200

300

700

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SOO

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200

SQO

SOO

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200 N N N N N N N N N N N N N N N N

S-2N

S-JH

20 70

20

100

20 SO 70 50 SO

700

500

700 70

100

100 70

200

JSO

700

100

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SO500

200

200

ISO

200

300

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100

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100

300 70

100 30

100

30

100 70

20

30

N N N N N N N700 N N N N N N N N N N N N N N

1,000

SOO

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700

700 N N N

700

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1,SOO

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200

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100

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100 70 70

200

200

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300

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300

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SO SO

N N N N N N N N N<200

1*000

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1,000

700 N N N N N N N N N N N N N N N

74

Tab

le

7.—

Sem

i qu

an

tita

tive

ap

eotr

OQ

raph

io a

nal

yaea

of

mod

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ely

mag

net

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oon

aen

trat

a oa

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a,

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ska~

con

tin

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ple

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ON

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S-A

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M379C2

N380C2

H38U2

M382C2

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M334C2

M385C2

M386C2

M387C2

M388C2

M389C2

M390C2

H391C2

N392C2

H395C2

M394C2

H395C2

M396C2

M3V7C2

H39CC2

M3V9C2

M405C2

H413C2

M415C2

H416C2

M417C2

H418C2

N419C2

M420C2

N42U2

N422C2

M423C2

M426C2

M427C2

M428C2

N429C2

M430C2

M432C2

N433C2

H4S5C2

M436C2

M437C2

N438C2

N439C2

A3 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63

63 63 63 63 63 63

63 63 63 63 63 63 63 63 63 63 63 63 63

63 63 63 63 63

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54 42

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56 24

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51 52

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47 17

47 37

48 44

50 23

49 26

49 20

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49

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56 21

58 44

48 47

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58

559 42

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549 56

52 29

52 29

54 34

56 10

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558 44

56 52

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54 12

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153

153

153

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153

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154

154

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154

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154

154

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154

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155

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155

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28 45

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20

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20

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1/000

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2/000

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Tab

le

1.—

Sem

iqit

nn

tita

tivo

ape

atro

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anal

yooa

of

mod

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mag

neti

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fra

qua

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gle

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ntin

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staple

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7. —

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ua

nti

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63 57 58

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Tab

le 9

.—S

emiq

uan

tita

tiva

ape

otro

grop

hio

ana

lyae

a of

aam

plea

of

aah

of

aqu

atia

bry

oph

ytea

, M

edfv

a qu

adra

ngl

e,

Ala

aka

sta

ple

LA

TIT

UD

EL

ON

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EX

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63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63

63 63 63 63 63

63 63 63 63

63 63 63

63 63 63 63 63 63 63 63 63 63 63 63 63

9 12 11 12 12 U 15 18 17 18 17 20 22 22 26 26 27 28 31 33 32 30 28 25 27 27 25 26 25 28 27 31 29 30 31 32 33 35 33 31 3* 34 35 34 37

43 54 0 34 36 58 37 13 52 25 13 23 33 34 11 49 37 32 50 53 43 19 24 S46 29 13 24 52 38 5 11 37 499 9

37 34 43 58 545 U 5S 43

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35 14 637 10 35 246 2 9 18

411 36

120

22 12 18 18 46

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$ S 5

111

Tab

le 9

.— S

emiq

uan

tita

tlve

epe

otro

grap

Mo

anal

yses

of

sam

ples

of

aah

of

aqu

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s-sa N

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112

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Tab

le

9.—

Sf-

napeotrographio

analyaea of aamplea of aah of aquatic br

yoph

ytae

, Me

dfra

qua

dran

gle,

Alaska- -continued

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12:

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