42LMNE0222 2.2572 METCALFE LAKE 010

RADIOMETRIC SURVEY REPORT

Walter Yzerdraat

LOCATION AMP ACCESS

The property surveyed is in the Metcalfe Lake Area, District of

Thunder Bay, Mining Map area M 1408. It is located 8 km south of a

point on the CNR transcontinental line at mileage 176 west of Horne

payne, and one mile east of the former station of Tashota. A winter

road connects the Metcalfe Lake area with Tashota in the north and

Onaman Lake in the south. Two creeks must be crossed when walking in

from Tashota; these crossings are hazardous. Alternatives are flying

in from Jellicoe, which lies 56 km to the south along Ontario Highway

11, or from Nakina, which lies 72 km to the east on the CNR line.

All pontoon-equipped airplanes can land on, and take off from, Metcalfe

Lake, which normally does not freeze over until mid-December.

GEOLOGY

The Metcalfe Lake Area has been described in several OBM and ODM

annual reports published since 1909 notably by P.E. Hopkins (1916-17),

T.E. Gledhill (1925), and L.F. Kindle (1931). Recent mapping was done

by S.E. Amukun (1973-74).

The area is part of a northeasterly-trending greenstone belt, bound

ed by batholiths in the southeast (Onaman granite) and in the northwest

(Auden granite). A smaller felsic intrusion is found near Redmond, to

the northeast of the area.

Archean volcanic rocks, of felsic as well as of intermediate and

mafic compositions, cover most of the area. These formations are inter

spersed with metasediments (mainly derived from the volcanics) and cut by

diabase dikes of various ages. Small gabbro plugs have been identified

in the area; their effusive equivalent, basalt, is rare, but pillow lavas

of andesitic composition are widespread. Deformation, metamorphism, car

bonaceous and siliceous alteration, and extensive overburden, make it

difficult to determine age relationships in the field.

ECONOMIC SIGNIFICANCE

The area has never seen major-scale exploitation of mineral resources

so far. Modest undertakings, mainly in gold extraction, were conducted

southeast of Tashota and north of Onaman Lake in the twenties and thir

ties. Evidence of mineralization, however, is widespread, and recent

years have witnessed a revival of exploration activity.

TIME AND EXTENT OF PRESENT WORK

This report deals with results of a radiometric survey on claims

TB 434053, 434054, and 434056, all located at the western end of Metcalfe

Lake. The three claims form part of a larger group, held by Walter Yzer-

draat of Ottawa. The group covers a roughly triangular area extending

from the Oboshkegan Township Line in the east, to McDonough Lake in the

west, and to the vicinity of North Brennan Lake in the southwest.

Most of the survey was carried out on a pre-existin- grid, described

in earlier magnetometer reports. Only line 60 of this grid had to be ex

tended for a few hundred metres in a southeasterly direction to provide

complete coverage of the three claims. This work was done in October of

1977.

The scintillometer measurements were performed on the 17th and 18th

of that month. Notes for the compilation of the outcrop map were taken

between early October 1976 and the dates of the present survey.

Data evaluation, plotting and drafting were done in Ottawa between

the completion of the field work and the writing of this report.

PRELIMINARY CONCLUSIONS

The three claims in question do not reveal any potential for discov

eries of radioactive deposits. The highest readings are recorded over

areas of deep glacial overburden, apparently consisting of sands and

gravels derived from more felsic areas to the northeast.

Wherever bedrock is exposed, the broadband readings and the thorium,

uranium and potassium responses indicate that there are only mafic and

sodic (i.e. low-potassium) rock types throughout the surveyed area,

with the exception of narrow metasedinentary bands and some scattered

erratic boulders.

THE SURVEY GRID

A DKM-1 theodolite was used to ensure the proper alignment of

all baselines, and to set up all wing lines. Fifty-metre metallic

measuring tape was used to establish the proper line spacing and

station intervals, taking into account the corrections required to

compensate for terrain slope. Trueness of the entire grid was veri

fied by measurements on control lines, outside the area shown in the

survey plan.

The numbering system is based on a unit of 25 metres. Line

numbers ascend from east to west, and station numbers from south to

north, analogous to the meridians and parallels of the geographical

coordinate system internationally used. The line spacing is four units

(i.e. 100 metres), and the station interval is one unit.

As the magnetic trends are between northeast and east-northeast,

a strike of N 54O E was chosen for the main baseline. The orientation

of the east-west topographical baseline is : erived from the township

line badering the claim group in the east.

INSTRUMENT AND MEASURING METHOD

The survey was conducted with a Scintrex GIS-3 (gamma-ray inte

grating spectrometer), an instrument designed to distinguish between

various energy levels of gamma radiation. The instrument was calibrated

in the field, at the start of each working period, with the help of the

manufacturer-provided standard thorium sample. It is left "on" in the

broadband short-period mode during tr/ -erses between stations. At the

station markers, the instrument was placed on the ground and switched to

the "long time constant" mode to obtain the broadband reading. The

energy-threshold switch was then set in the K-HJ+Th position to obtain the

combined reading for these three elements; subsequently, a reading would

be taken for U+Th, and finally, for Th only.

Despite the 3-second "long time constant", intended to smooth out

the natural random fluctuations of the gamma-ray flux, radiation levels

in the range of zero to about ten counts per second require a consider

able observation time to be established with any degree of reliability

and reproducibility. This technique was followed during the first day-

and-a-half, then, when the work moved to areas with lower broadband

counts, and the results of K-U-Th spectroscopy became less and less sig

nificant, further attempts at separate recording were abandoned and only

the broadband values taken.

PLOTTING

In the survey plan, the grid is very accurately represented. Actual

line spacings and station intervals have been established to well within

one metre. It will be noted that lines 56 and 60 are shifted northeast

ward by ten metres over part of their length; the reasons for this shift

are not related to the radiometric survey.

The position of the shoreline is generally accurate within one or two

metres, but in certain places this positic depends on the criteria one

wants to apply to distinguish between land and water. The north shore of

the west arm of the lake is occupied by a zone of muskeg with waterholes,

grading into a zone of bullrushes with occasional tufts of grass; parts of

the southwestern shore are sandy and the lake bottom deepens only very

slowly; elsewhere in the same area, certain rock formations are above the

waterline and connected to the rest of the land during much of the year,

but under water at other times. It seemed therefore appropriate to re

present the shoreline by a bold line indicating a "grey area".

The numbers along the survey lines represent the recorded broadband

readings; in order to keep clutter to a minimum, the spectral readings,

where taken, were converted into percentages of each of the three measured

elements, and these are shown in symbols except where all three ele

ments appeared to be below the limit of detection. The broadband values

are contoured on the 10 and 15 cps levels.

For processing, a background value for each mode of reading is

derived from the most prevalent minimum reading for that element, or that

combination of elements. These background levels are subtracted from t.he

recorded readings before computation. Only the broadband values are given

as recorded.

DISCUSSION OF RESULTS

The highest values for K and U (and even these are seldom much above

the detection threshold) are recorded on the esker ridge covering most of

claim TB 434056, and the southern half of TB 434053. The provenance of

this material is uncertain, but ~-e may assume that much of it originated

in the Redmond area to the northeast, where a medium-sized felsic pluton

is exposed over an area of several square miles. Striae found on bedrock

in the Metcalfe Lake Area indicate that the ice sheet was moving in from

that direction during the last stages of glaciation. It seems desirable

to explore this possible source area in more detail than has been done so

far.

FURTHER RECOMMENDATIONS

The lithology of the area covered by the claim group changes toward

the west and northwest, where considerably more abundant outcrop occurs.

It appears therefore advisable to extend the radiometric survey in this

direction in the near future.

QUALIFICATIONS

The author of this report has a theoretical background in geology

and geophysics, and has accumulated a wide range of field experience in

various parts of the province over the past ten years.

He has supervised and/or executed all the preparations and operations

needed to conduct the present survey and to evaluate the results.

Ottawa, 20 December 1977

42L*4NE*222 2.2572 METCALFE LAKE OSO

GROUND-MAGNETOMETER SURVEY REPORT

Walter Yzerdraat

LOCATION AND ACCESS

The three claims surveyed are part of a claim group held by Walter

Yzerdraat in the Metcalfe Lake Area, Mining Map M 1408, Mining Division

of Thunder Bay. They lie some seven kilometres south of the CNR trans

continental line, reckoned from a point 176 miles west of Hornepayne and

one mile east of Tashota. Apart from the possibility of walking in from

that point, one can fly in i om either Nakina on the CNR line, or Jellicoe

on Ontario Highway 11, which lie 72 km to the east, and 56 km to the

south, respectively.

GEOLOGY

The main features of geological importance have been described at

some length in previous reports of magnetic surveys on the same claim

group. The Metcalfe Lake Area is at the southwestern end of a northeast-

trending greenstone belt which pinches out in this locality between the

large batholiths south and west of Metcalfe Lake. Archean volcanic rocks

are the predominant type in the area; mafic dikes and small mafic intru

sions are found cutting and invading the volcanics. Sediments are inter

calated with the volcanics. Shearing is evident in many localities, but

the evidence for major fault movements is not strong. Local structural

trends are northeasterly, with conspicuous deviations in the vicinity of

the plut cms.

ECONOMIC SIGNIFICANCE

The exploration of the area presents some challenge. The contact

between intermediate and more felsic volcanics is known as a favourable

target in the vicinity of plutons. In the Metcalfe Lake area this zone

is largely covered by the lake and by an esker, although there is consider

able outcrop away from these. Exploration in the twenties, when geo

physical instruments were less developed and less generally available for

field use, turned to the numerous unexplored areas with better exposure.

In course of time, small-scale mining sprang up in two localities; the

main value of the extracted ore was in gold. Base metal deposits of suf-

fiecient size to warrant exploitation were not found.

TIME AND EXTENT OF PRESENT WORK

Recent work was done on claims TB 458685 to 458687; it forms another

extension of a long-term program to map and evaluate the ground-magnetic

features of the claim group. The existing grid was expanded considerably

in July-August and October of this year, to provide complete coverage of

the three claims surveyed, and substantial coverage of some other claims

as well. Most unfortunately, an instrument malfunction prevented com

pletion of the survey, and invalidated part of the results already obtained

at the time when the malfunction became evident. The accompanying survey

plans shows only those reading about which no reasonable doubt exists.

As only a few days of field work are needed to repeat the spoiled work

and to complete the coverage of the claims affected, it is hoped that an

extension of time can be obtained for this purpose.

Ottawa, 20 December 1977

GI 42L04NE8222 2.2572 METCALFE LAKE 90©Ontario

TO BE ATTACHED AS AN APPENDIX TO TECHNICAL REPORTFACTS SHOWN HERE NEED NOT BE REPEATED IN REPORT

TECHNICAL REPORT MUST CONTAIN INTERPRETATION, CONCLUSIONS ETC.

Type of Survey(s) —CTQPHYSTfM

Township or Area.

Claim Holder(s)—-

T .air o Ar**a M14Q8 HTSA2T./4

Survey Company—

Author of Report —

Address of Author.

Itoltw Yzgrdraat, Lie. A38149 Box 4225, Station E Ottawa, Ontario K1S 5B2

Covering Dates of Survey.

Total Miles of Line Cut —

IS Oot-nhgr-20 rtofornhgr 1977 (aT\ (Enecutting to office) typeB of

n.is—^-^^^—^^^^—^—

SPECIAL PROVISIONS CREDITS REQUESTED

ENTER 40 days (includes line cutting) for first survey.

ENTER 20 days for each additional survey using same grid.

Geophysical

—Electromagnetic———

—Magnetometer____

—Radiometric———20.

—Other-^^———^——

DAYS per **Janr*

Geological.

Geochemical.

AIRBORNE CREDITS (Special provision credits do not apply to airborne surveys)

Magnetometer. .Electromagnetic. . Radiometric(enter days per claim)

HATF- 2? n^c. 1Q77 SIGNATURE:.Author of RcpOfTor Agent

Res. Geol.. Qualifications.

Previous Surveys File No. Type Date Claim Holder

MINING CLAIMS TRAVERSED List numerically

TB"(pVefix)

.....TB...

.434053.........(number)

..434054..........

.TJ..............A3AQ56.

lus

TOTAL CLALMS-

SELF POTENTIAL

Instrument^—^^^^^—^^^^^———^—————————^^^^^^^—^^^^^^^— Range.

Survey Method .^^——^^^^^^^^^^^^^^-^^—^^^^^—^^^^^—^—^——————

Corrections made.

RADIOMETRIC

ca.nma-1-ay Integra t ing spectrometer. GIS-3. Scintrex

Values measured Pi-oa^h?"^ g4ff-t-Th, n+Th, Th

Energy windows (levels) aa aft- hy the

Height of instrument plarpH on the grniind for r^ad^ngs BarkgroiinH Cnnntl^Sfor K+U+Th; 1.2 U+Th.8 for Th Size of detector___?-int*h

Overburden glacial aanHg ant! aya^rela "In gnurh; nroanlt* or organ^fc/glacial elsewhere! Very variable depths: (type, depth - include outcrop map)

from less than 4 inches to over 3 metresOTHERS (SEISMIC, DRILL WELL LOGGING ETC.)

Type of survey_________________________________________________________

Instrument ̂ ^^——^^^-^^^^^^^^^^^^^^^^^^^——^^^^———^^^^^^^^^^-^^^^^^^^^—

Accuracy_____________________________________________________________

Parameters measured_____________________________________________________

Additional information (for understanding results)___________________________________

AIRBORNE SURVEYS

Type of survey(s) ̂ —^—

Instrument(s) ——————(specify for each type of survey)

Accuracy_________________(specify for each type of survey)

Aircraft

Sensor altitude.

Navigation and flight path recovery method.

Aircraft altitude__________________________________Line Sparing

Miles flown over total area___________________________Over claims only.

GEOCHEMICAL SURVEY - PROCEDURE RECORD

Numbers of claims from which samples taken.

Total Number of Samples. Type of Sample.

(Nature of Material)

Average Sample Weight————————

Method of Collection_________

Soil Horizon Sampled.

Horizon Development.

Sample Depth^—^—.

Terrain_________

ANALYTICAL METHODS

Values expressed in: per centp. p. m. p. p. b.

n n n

Cu, Pb,

Others—

Zn, Ni, Co, Ag, Mo, As.-(circle)

Field Analysis (.

Drainage Development____________

Estimated Range of Overburden Thickness-

Extraction Method,

Analytical Method-

Reagents Used———

Field Laboratory Analysis

No.(-^————^—

SAMPLE PREPARATION(Includes drying, screening, crushing, ashing)

Mesh size of fraction used for analysis____

Extraction Method.

Analytical Method -

Reagents Used ——

Commercial Laboratory (.

Name of Laboratory-—

Extraction Method——

Analytical Method __

Reagents Used _____

.tests)

.tests)

.tests)

GeneraL General -

GEOPHYSICAL TECHNICAL DATA

(iKOL.Nl) SL'RVF.VS It more than one survey, specify data for each type of survey

Number of StationsStation interval ?S mof-roa

Profile scale—^—————^^——

—^^-—^——^^—^^— Number of Readings .

t 1O m oorao-f Anal Line spacing TOO m

Contour interval fnnfr"irs a f ifl anH IS c

Instrument.Accuracy — Scale constant. Diurnal correction method.Base Station check-in interval (hours). Base Station location and value ^——-

InstrumentCoil configuration

^i Coil separation ———l .—'! Accuracy ̂ ^—^^2!—i Method:^^^! Frequency_____

Parameters measured.

CH Fixed transmitter O Shoot back O In line O Parallel line

(specify V.L.F. station)

InstrumentScale constant __ Corrections made.

Base station value and location .

Elevation accuracy.

Instrument -—^——^^——— Method l l Time Domain

Parameters — On time —— - Off time ___— Delay time ___— Integration time.

Power.

r~l Frequency Domain _ Frequency ^^.^.^ — Range ________

Electrode array _ Electrode spacing . Type of electrode .

(itario

Ministry of Natural Resources

GEOPHYSICAL - GEOLOGICAL - GEOCHEMICAL TECHNICAL DATA STATEMENT

Fill- .x. -l'j~}

TO BE ATTACHED AS AN APPENDIX TO TECHNICAL REPORTFACTS SHOWN HERE NEED NOT BE REPEATED IN REPORT

TECHNICAL REPORT MUST CONTAIN INTERPRETATION. CONCLUSIONS ETC.

phvs i*Type of Suryey(s) .Township or Area MetcalfClaim Holder(s)

M1&Q8 NTS &2T.4

Box 4225, Station E, Ottawa K1S 5B2

Survey Company-

Author of Report.Address of Author.Covering Dates of Survey 26 July - 20 Dec 1977—^^-——^—

(linecutting to office) (including both

Total Miles of Line Cut 1. S________________________

SPECIAL PROVISIONS CREDITS REQUESTED

ENTER 40 days (includes line cutting) for first survey.ENTER 20 days for each additional survey using same grid.

— i-iGeophysicalDAYS

per claim

40

-Other.

AIRBORNE CREDITS (Special provision credits do not apply to airborne surveys)

Magnetometer. .Electromagnetic. . Radiometric

71

(enter days per claim)

SIGNATURE:1977 Author of Report or Agent

Res. Geol.. .Qualifications.Previous Surveys

File No. Type Date Claim Holder

MINING CLAIMS TRAVERSED List numerically

TB 458685"(prefix) ""

...TB..4.58686..(number)

.TB..4JJ8687..

v

l

TOTAL CLAIMS.

GEOPHYSICAL TECHNICAL DATA

GROUND SURVEYS — If more than one sun-ey, specify data for each type of survey

Number of Stations—220_______________________Number of Readings 505

Station interval 25 metres regular; 2.5 m for detail Line spacing_______100 metres^^_____

Profile scale_______________________________________________________________ Contour interval contours at -6QQQ -4000 -2000 —1000 -400 O 200 400 600 1000

1500 2500 5000 10,000 20,000 40,000 60,000 100,000 above datum

Instrument Fluxgate, vertical force t Scintrex MF-2_________' —-^^^^——-—.^——

U

g Zo

oad

Accuracy — Scale constant S gamma g uhpn on Iflflfl gamma gfalf * seal** divisions 20 gaimnag

U Diurnal correction method ohprk loops on an auxiliary hasel-ine; regular

Base Station check-in interval (Hours) awragp; 7 hours-——^^-^——^-^——^—

Base Station location and value a,t ngf-//^ nf TR ASRftftfi — ahgrtlnf-o •^Tf>T•r^ra^ rmnonoTil- Sft^PfiO

InstrumentCoil configuration ^^^^-^————^^^^^^^———^^^——^—.^^—^—.^——^^-^——.^—^———^—-^—

Coil separation ______________________________________________________________

Accuracy _______________________________________________________________ Method: d Fixed transmitter d Shoot back d In line d Parallel line

Frequency_______________________________________________________________(specify V.L.F. station)

Parameters measured^———.^^-^——————.^^^^———.^^^—^^——-^^^——.^—^^^-———^^^——^—

Instrument ____

Scale constant —. ?- b; Corrections made.< ___________

Base station value and location.

Elevation accuracy-

Instrument -^——-——^^^^^^——-^^^.^^—^^-——^^^——..—^^.^^^^-^——^^^^ Method d Time Domain l~~l Frequency Domain

Parameters — On time ____________________________ Frequency ̂ -——^— Off time ____________________________ Range ^--————-— Delay time ̂ ^—^-^^-^^^^—.—^.—^-^——^^—

— Integration time ^^^-—^—^——^-^..^——^..^-—-—.

Power———^———-—^^—————-^-^—^^—^^^^—.—.^-^—^——-^^^^——.^-—

Electrode arrav______________________________________________

Electrode spacing. Type of electrode.

800 I6'—l

870 30

——l 500 15STfTJKK i044j KK 376? V K * f tj

'4716181471831

604824'2576 --—U 8046S9

GZOWSKI f 1 TWPo)

FOR STATUS REFER f TO TWP PLAN

i i 3,33 v 417 i r r r96'"41,8048 2B |6046Z7^80J9,7?. l ' 'l , ' l t

436260 t 4)Bt89 141 8161 . ,, ——l—— —— J- —— -J--

471476 j 471483 |4i 1484 J47I48BI

47,474 Vl 47 ,47rj47.4p

OBOSHKEGAN

FOR STATUS REFER TO

7r TYF—m~T-'

487188 J4B4 80S 4MB04| 467I68

487164 (467149

—.-.. — ___LI™50C O7' 30' --600 07' 30'

870 4b' H7 0 30'

LAKE 200

AREA

METCALFE LAKE

DISTRICT OFTHUNDER BAY

THUNDER BAY MINING DIVISION

SCALE: 1-INCH 4O CHAINS

LEGEND

PATENTED LANDCROWN LAND SALELEASESLOCATED LANDLICENSE OF OCCUPATIONMINING RIGHTS ONLYSURFACE RIGHTS ONLYROADSIMPROVED ROADSKING'S HIGHWAYSRAILWAYS POWER LINES MARSH OR MUSKEG MINES

NOTES

400' surface rights rfttervotion uruunu oil lakes S nvert.

NATIONAL TOPOGRAPHIC SERIES 42 L

PLAN NO

ONTARIO

MINISTRY OF NATURAL RESOURCESSURVEYS AND MAPPING BRANCH

MAGNETOMETER SJRVEY PLAN Metcalfe Lake Area M 1408

Recorded holder W Yzerdraat- Licence A 38149

Instrument Scmtrex MF-2

220 regular stations, 505 readi ng, - July - Oc tober 1977

0-level represents 58,885 gammts vertical force

Base station, z-component 58,260

D Claimpost

: Onaman

lake Nipigon

1*4***". f* 4*40*-* SCAL E l . iOOO

50 75 100Metres Key Map

Lake Superior

Metcalfe Lake

Walter Yzerdraat Dec 1977

42U94NE0222 2.2572 METCALFE LAKE 210

t K7

RADIOMETRIC SURVEY PLAN M1408 Metcalfe Lake Area

Recorded holder. Walter Y/erdraat, Licence A 38149

Instrument Scintrex GIS 3

250 stations 550 readings October 1977

Readings shown incps, brodband mode

Ta.holo Kowko.h

; M uo8si Onaman AREA * S L a k e

SYMBOLS

UTB 434054. GO-04%O O 5 - ) 4

9 l 5 -3 096

. DO-00004% . O O-O 0004P O 0005-0 0014 % A O 0005-0 0014"HiB O 0015-0 0024"*) A O 0015-0 002456

A O 0025-0 003496Claim post A O 0035-0 004496

SCALE l 200050 /5 100

Lake Superior

Walter Yiftrdraat t)aC 1077.

eeo