GEO-TECHNICAL DEVELOPMENT CO, LTD, ^WELLINGTON STREET … · ^WELLINGTON STREET WEST TO/ONTO,...

52BieSE01S6 63.480 MOSS010

RliTORT ON

REPI,8TIVITY SURVEY

OK PROPERTY OP

NfiWKJRK HIKING CORPORATION LIMITED

Under Optior). ^frprn

GRliAT LAKES COPl'ER MINiiS LIKITKD

AT

FOUNTAIN LAKE, MOSS TOWNSHIP

DISTRICT OF THUNDiiK BAY

ONTARIO

Prepared by:

E, P. Sheppard, Geologist for

GEO-TECHNICAL DEVELOPMENT CO, LTD, ^WELLINGTON STREET WEST TO/ONTO, ONTARIO

BED -TECHNICAL DEVELOPMENT COMPANY LIMITED

52B10SE81S6 63.480 MOSS 010C

R 1C F O R T 11, y\.

Introduction ...,........................,...... Page l, 2

Sumnury and Recommendations *.........**........ , 3

Location, Access, Topography . * *.......... *... *. Page 3i k

General Geology ..................*............. Page !|

Explanation of Resistivity Method ....,......... Page l {. t 5, 6

Geology arid Structure .......... *......,.....,.. Page 6

Resistivity Results ...............,..,,........ Page 6 to 1^

Survey Data ......*...*...............,,...*.... Page 1,5, 16

is- -;i- ir vi- -ir X i f

PLANS NOS. l, 2, 3 ......, Resistivity Contoursand Geology,

(Drawinc Ref. Plan No. l llf-U-^lj.

Plan No.2 15-k-Zk

Plan No,3 16-1|-51|.)

6ED- TECHNICAL DEVELOPMENT COMPANY LIMITED

SWewklrk Mlnlnf, Corporation Limited, 100 Adelaide Street West, Toronto, Ontario

Gentlemon:

The following report describes the electrical

resistivity survey conducted over ^2 mining claims of the

Fountain Jjake property, optioned from Great Lakes Copper

Minos Limited, 1^ miles south of Kashabowie, Ontario.

Tho survey wan conducted by Geo-Technical

Development Company Limited during the period from February

17th to March 26, 195H* under the direct supervision of

E'. B. NichollH, B.Se, who completed most of the active work,

The vrrlter spent the period of March 22nd to March 2^th,

on the property. The bulk of this period war, spent in re-

logRinft core from 10 diamond drill holes at Fountain Lake

and collecting samples from trenches and rock exposures,

The writer wan conducted over the property by Mr, Caesar

Grammetto, prospector in the employ of Great Lakes Copper

Mines Llrolted,

Tho claims covered by the survey are as follows:

Unpatented claims T.B. 31788, 31832* 31836, 3183.7, 31838,

31839, 318140, 32138, 3211*1, 3211j2, 3211+3, 3211)1), 321l#,

3211)6, 3211+7, 3211|0, 3211|9, 3215,'Q, 3235'!, 321^2, 32270,

32271, 32272, 32273, 32271;, 32275, 32276, 32277, 32278,

32279, 32280, 32281, 32282, ^2522, 1)2^23, \ \1#8\ 9 k&tt,

1|23'26, (42^27, 1)2^28, 1|2529, 1|2530, U337S, 1^3376, 1+3377,

143378, 1)3379, Ip38o, l)338l, 1)3382, ^3383, 1|3381|.


-2-

The reaults of the survey are shown on the accom-

punylnp, plans Hos. l, 2 and 3 (Hef.' Nos. Ii|-l.j-5l4-, 15-^-5*1

and l6--;i.-0)j respectively) ,

^umj r.i ary and^ JR a commend atjU) n s

The resistivity survey checks the geological

informs f'on fairly closely, except in the northwest portion

of the property (claims T,B. 32202, 32272, 32275, 32281,

32?73, 3183^, 32280, 3227)1, 31837).

Some 18 p;eod conducting aones are shown by the

electrical survey. Of these, 9 are considered to be of

primary importance, but strength of all the anomalies suggests

the presoneo of sulphides.

The structural picture, while complicated, is

encouraging and with the number of good conductors found

makes the area an extremely interesting one In which to search

for sulphide ore shoots.

Surface exploration is recommended on all the surface

anomalies, followed by diamond drilling on the primary

anomalies where surface work cannot eliminate them.

Geological information gathered from relogging core

of 10 holes showed that Hole #3 intersected an andesite granite

contact and showed It to be a shattered contact but unmineral-

Izod, Holes //l and j/2 wore lost. Holes #i| to #9 were drilled

from the same setup on the main trench and showed chalcopyrite,

The drilling program did not supply much .Information on the

property and appears to have missed its main objectives.

GEO -TECHNICAL DEVELOPMENT COMPANY LIMITED

-3-

drilling is recommended on "A" and "B"

zones. Careful selection of the drilling sites with regard

to topography should avoid the difficulties encountered by

the original drilling program.

Surface work is recommended on the remaining zones

in the form of detailed geological mapping and sampling where

mineralization shows, followed by diamond drilling where pre

liminary follow-up work substantiate F. the conclusions of this

report.

The L̂ 2 mining claims covered by the survey lie some

13' miles south of Kashabowie Station on the Canadian National

Railway and about 80 miles by road from Kashabowie to Port

Arthur, Ontario. Land route is from Kashabowie Station by

road to Goldstream Copper Minos Limited on Burchell Lake, a

distance of 9 miles, thence by canoe south to portage on

Burchell Lakes, down Squeers Creek to Twin Lake and into Fountain

Lake, approximately 6 miles. The total distance is 1^ miles,

The most direct route is by air from Port Arthur direct to

Fountain Lake, or from Kashabowie Lake to Fountain Lake.

Fountain Luke occupies the central portion of the property.

The area has fairly rugged topography, with rocky

hills rising to over 1,^0 feet above Fountain Lake. The inter

vening valleys are composed of swamp areas and occasional

small ponds. The area is thickly forested with first-growth

spruce, jackpine, birch and poplar, the low areas being


-k-

cove3-0(1 with thick growths of alder and willow. Alluvial

tf'Od, lacustrine deposits und glacial till make up the

overburden In tho aroa,

(TO ri oi* ul. r Gt)ol oj^y

Detailed geological mapping was carried out by

L. Ferris Kendall-Leicestor in 193^2. The areu is the

southern part of an extensive belt of Precambrian volcanic

rocks which follows an axial direction, extends we-l^r-ly

through Shebandowan and Burchell Lakes, then swings eouth-

westerly through Fountain Lake and I;Joss Lake* This series

of volcanics is Invaded by peridotite^ amphibolites, diorites

and quar t a diorites of Hailoyburian age, and syenite, syenite

porphyry, etc. of Algoman age, Pyritiferous copper, nickel

and irjolybdonite mineralization occurred during Keweenawan

UC6J glacial and recent deposits of boulder till, clay and

gravel, alluvial oand and lacustrine deposits of Pleistocene

age. The general strike of the formations is northeast,

The aroa has been strongly sheared and faulted.

The geology has been described in detail by

Kendall-Leicester in his report on Fountain Lake property

and is appended.

Ex pjL an a t i on ̂ of m HO sj. st i vi t y Method

The) method used by Oeo-Technical Development Company

Limited is a form of the early resistivity methods modified

by some seven consecutive yeurs experience in tho field. In

essence, a known current is put into tho ground and readings


are taken at 50 foot intervals along the picket lines by

sensitive vacaxum tube voltmeters measuring the voltage drop

across this Interval, Calculations translate these voltage

readings into resistance values in terms of ohm-centimeters.

These are plotted on the accompanying plans Nos. l, 2 and 3*

Due to the inhomogeneity of the medium being

examined, the complexity of the geology and structure,

mathematical formulae can seldom be used to interpret the

results of a reconnaissance survey. Interpretations are

based on experience and a knowledge of the geological condi

tions in the urea being tested. Where the latter are unknown,

the interpretation mast, of necessity, be limited or very

tentative. However, without any geological information it is

generally possible to differentiate between banded rocks such

as volcanic s, sediments or gneiss and largo bodies of massive

intrusive s, due to the difference in electrical conductivity

between the various flows or beds. Strike trends, folding,

etc, are therefore readily picked up. In some cases the

presence of rock contacts may be inferred.

Shear or fracture zones are relatively better con

ductors due to their high water content. Where extreme low

resistivity values arc found, graphite or sulphides are

indicated. Graphite is found in schist or shear zones which

are shown by electrical methods-as, generally, narrow low

linear trends. Unfortunately, from the point of view of


-6-

iriterpretation, sulphides may be present with the graphite

or may occur 1n shear zones giving similar low linears.

Prom t ho geological data available to the writer on this

property, the odds are in favour of the presence of sulphides

r o t h or than graphite.

Detailed geological maps made over the land areas

of tho claims group by L. Kendall-Lelcester have assisted

the writer in the interpretation of the survey results. At

the same time, the geophysical data does not agree in all

cases with the previously gathered geological data. Lack

of outcrops in drift- covered areas loaves the geological

datu interpretation opon to change. In other words, dikes

and minor intrusions may bo parallel to general trends of

tho r-tjfij i*tiv3 i. y survey and not as shown on the detailed

go o l o i ;i c a l pi an ,

H os i. st 3 y 5. ty Jje su l ts

The various zones of considered primary importance

arc discussed in tho following paragraphs under their

designated letters.

"A" zone commences on the east side of Fountain Lake

and runs northeast for approximately 1^00 feet. This area had

boon previously diamond drilled by two holes, Nos, l and l\.,

//l Hole was drilled to a depth of ?.QB feot whero it broke

through the edge of the hill. Cementing was attempted but

the hole was finally abandoned. The log of this hole is


-7-

appended. Hole //lj. was driven from north of #1 towards, the

bottom of //l In order to explore the ground that the first

hole failed to reach. The hole was cased to 1E# feet;

bedrock was not reached and the hole was abandoned. The

results of those holes are Inconclusive. The resistivity

survey indicates that the drilling did not reach its

objective.

Field observations made by the writer on March 2lj.th

showed heavily sheared granitised greenstone with a strike of

N l|50# and a dip of 650E. At the nose of the outcrop trenching

had been carried out. Grab sample #2 was taken from material

dug out of the snow by Mr. Craiwiette and presumably comes from

the trench blasted there. This sample was heavily mineralized

granitised greenstone. Visible minerals were chalcopyrite and

pyrite.

Assay results are j Cu 3.270

ZnNil

Ni Nil

Further surface investigation of this area was

hampered by deep snow and a three-foot depth of ice which had

built up at the base of the cliff. The good conducting zone

outlined by the resistivity survey corresponds very closely

with the contact of quartz feldspar prophyry mass and volcanics

outlined on Kendall-Leicester's map. Previous sampling from

this area gave results of 10# Molybdenite and 10^ chalcopyrite,

"B" zone occurs 300 feet south of the "A" zone, has

a length of approximately f&O feet, trends N i|^0E or parallel


-8-

to "A" zone. Keferring to Kendall-Leioester's geological

map, the "B" zone appears to show the south contact of the

feldspar porphyry mass with volcanics. The zone also corres

ponds closely with shearing indicated on the map. This area

does not appear to have been investigated. The "B" zone

therefore warrants the same amount of investigation as "A"

zone, as their relative positions geologically appear to be

of equal significance.

"C" zone, 1|.00 feet south of "B", has a length of

lj.00 foot, with strike approximately northeast, and appears

to correspond with a quarts, porphyry dike indicated on the

map. Outcrops are few In this area and the strike, width and

extent of dikes and dacite flows are-open'to question,

The slight bend in the "C" zone at its western end

may indicate the position of a south-eaet striking fault.

The strike of the fault is not clear. This "C" zone may be

of secondary importance.

"D" zone has a strike parallel to "O" with a length

of approximately 700 feet and corresponds to an indicated

dacite flow. The greater width of the good conducting zone

than that of the indicated dacite flow may be a better

indication of actual width of the flow than the geological

picture which was outlined from a few outcrops. The small

conducting zone to the south of "D" may be the expression

of small intrusions of diorite, ^ither of these formations

may be favourable host rock for sulphide replacements.


-9-

"E" IB a linear zone of good conductance with

N ^00E strike and corresponds to part of the dacite flow

outlined in this area or, more specifically, a band of

andesite in the dacite, ^his andesite may be heavily sheared.

Diamond drill holes Nos. 2 and 3 were drilled north of and

away from this z one. Investigation of "E" Bone should be

contingent on results from "C" and "D",

"G" zone of good conductivity has an approximate

length of 1000 feet, atr-lko N 1|50S, irregular width, varying

from 100 foot on the wost end to 300 feet on the east end.

This zone conforms to indicated dacite flows. Two drill

holes are shown on the geological map, intersecting the west

ond of "(r 11 zone. The core from these holes was not available.

It I B u nderstood that those holes were drilled prior to the

10-hole program mentioned in this roport, fJold was reported

from these holes.

"H" zone of good conductivity conforms with rhyolite,

dacite contact indicated on the geological map, location (6).

Earlier \tfork showed the presence of chalcopyrite, zinc blende

and pyrite. Surface investigation le warranted along this

zone; i.e. trenching and detailed geological mapping. Prom

this work some idea may be obtained as to size and extent of

the chalcopyrite mineralization.

The general structure along this northeast strike

indicates a fold or series of folds, with fold axis generally

northeast. The whole series of flows is intersected by quartz


-10-

porphyry dikes and broken by numerous faults and shears.

"I", "J" and "K" zones of good conductivity appear

to have the same geological setting as "H". "K" Is a narrow

j?0 foot zone of good conductivity with strike of 300 feet*

"J" zone is parallel In strike with a width of 100 feet f

length of 700 feet, general strike of northeast.

These zones of good conductivity may represent

shear zones in the volcanics. The presence of pyrrhotite in

some of these shears is a possibility not to be overlooked.

"L" zone of good conductivity conforms fairly

accurately with Zone (13) on the geological map. Three

diamond drill holes are shown but core is not available. A

re-examination of the cores, should they become available,

would be of interest and might give the key to the cause of

the good conductive zone outlined by the resistivity survey.

In the event that these cores are required, Mr. Craramette

(Caesar Crammette, Fort William, Ontario) should be able to

locate any cores not stored at Fountain Lake.

"M" zone of good conductivity is narrow, linear,

and extends for a distance of 1^00 feet in a northeast

direction. The eastern end coincides with the site of two

drill holes put down on a surface showing reported to carry

gold. The core from these holes was not available and Mr.

Crammette reported that they had been taken to Port Arthur.

The strike of this conducting zone does not coincide

with the strike of geological formations as shown on the


-11-

geological map. This is an area of few outcrops and the

formations may be found to have a Strike more nearly north

east than the interpretation shown on the geological map*

Relogging of core and detailed surface mapping should be

carried out before further and more expensive work Is under

taken on this gone.

"N" zone of good conductivity outlined by the

resistivity survey is approximately 1600 feet in length, has

a northeast strike and a width of ^0 feet on the west end,

300 feet in the central portion and tapers down to 100 feet

on the east end. The major portion of this zone is under

the surface of Fountain Lake. The western end coincide? with

a series of felsite dikes and rhyolite flows. The area to

the west is swampy with few outcrops. It is suggested that

the strike of the formations lie more nearly east than the

geological map Indicates,

"O" zone is a narrow, linear conductor approximately

900 feet long with a strike of approximately east-west and

slightly curving to southeast. The eastern end of the zone

corresponds with outcrops of diorite which shows on the

geological map as a narrow curving dike. A few isolated

diorite outcrops occur to the west. The zone of good con

ductivity outlined by the resistivity survey shows a definite

east-west zone which could possibly be a mineralized diorite

intrusion.


-12-

The area warrants Investigation starting with a

search for additional outcrops followed by trenching and/or

diamond drilling.

"P" zone is a narrowi linear conducting zone*

trending oast-west approximately parallel to "O" zone,

coincides with outcrops of lumprophyr dike. The remainder

of the area Is drift-covered. Investigation of this area

could be conducted In conjunction with that of zone "O",

"X" is a narrow, linear curving conducting zone,

general strike north-east, coincides with syenite mass which

intrudes volcanics. The zone is interpreted as a shear zone*

Presence of sulphide mineralization in this shear zone is a

possibility; it should be investigated,

"P" zone, located In the north-west corner of

claim 32130* The resistivity survey showed a weak zone of

good conductivity. This zone coincides with the location of

a chalcopyrite showing on the above claim and designated on

Flan No. l as #3* This showing is described by Kendall-

Loicester as a well mineralized strike fault breccia zone,

containing 10' to 12' widths of lenses of mass sulphides,

expoBed by stripping. The general outlines of the showing

are reported as 10' - 12* widths, siliceous breccia, length

2? feet. Rock trenched to depth of 3 feet to ^ feet. The

vein gangue consists of sugary quartz well mineralized by

locally massive lenses and clusters of chalcopyrite and

pyrrhotite-pentlandite. Disseminated pyrite occur across


-13-

an additional width of V - 10' to the north in fractured

andesite. Magnetite le also present and encrustations of

corelllte*

This area was visited by the writer in March. A

grab sample was taken from rock pile and assayed* the results

being as follows:

Sample Cu 9782J5

2nnil

Ml nil

Diamond drill holes Wos, f? to 9 were drilled in

November 19^2 from the same setup on top of the main trenched

zone # (3). The following samples were taken from these

holes:

Sample No. D.P.Hoie Depth of Sample Cu Zn Hi

Tracel

k

6

l68*19'90'

These samples were grab samples selected from what

appeared to be tho best minei'alized lengths found in the core*

The logs of the holes are appended.

The drilling from this location showed that an

Irregular wedge-shaped plug of chert touches the surface

at this point. It strikes west and plunges west, widening

out in depth. The chalcopyrite mineralization appears to

decrease rapidly with depth.

#12 Showing, described in Kendall-Leicoster's report

as a 6' wide strike fault, shear zone, characterized by red

fault gouge and much chlorite schist, 50 feet to the south


-34-

a parallel strike fault was reported. It is a graphitic

shear zone,

This occurrence did not show up on the resistivity

survey results. It is thought that the location of the show

ing is somewhat farther north, possibly just beyond the north

boundary of the property, hence it was not surveyed.

drab sample No. 6 given to the writer by Mr, C.

Crammettei is presumed to have been taken from this showing*

The results of assaying this specimen are as follows:

Copper - 3.22?o,

A possibility also arises that this showing fell

between two of the survey lines and is less than Ij.00 feet

in length, thus it would not appear in the resistivity

results.

This area, especially that adjacent to the north

boundary of the property, should be Investigated further

and extent, direction and size of the shotting established.

To generalise} Prom the study of individual zones

a general picture emerges: i.e., the zones "A" and "B"

appear to occur on contacts of a granite or quartz porphyry

mass. The resistivity survey outlines the granite as more

boss-shaped than the Geological Map indicates. Taking these

zones as "types", "O" and "P" appear to occupy the same

relative positions.

Nine good conducting zones appear to warrant

immediate investigation, In order of importance they may


be placed as follows? "A", "B", "C", "F", "O", "M", "O",

"K", "L". Many of tho so-called secondary anomalies, however,

may be found to have equal importance as all may contain

sulphides.

It is recommended that all the anomalies be

investigated by surface examination if possible. Where

direct evidence cannot be obtained, drilling is recommended

on primary anomalies. Depending on the results, the secondary

anomalies may warrant further investigation.

Survey Data

The electrical resistivity survey was carried out

over f?2 raining claims of the Fountain Lake property optioned

from Great Lake E Copper Mines Limited, located in Thunder Bay

District, Port Arthur Mining Division, Ontario,

The survey was conducted by Geo-Technical Development

Company Limited during the period from February 17th to March

26th, 195'1|* Two major base lines were established, one

traversing the northern and one the southern sections of the

property. The base lines were established in N i?J?QE direction

and N lj.0 0 W-8 1|0OE. Picket linea were turned off at right

angles to the Base lines at lj.00 foot intervals.

Plan No. l (Resistivity Contours and Geology)

depicts the results of the electrical resistivity survey and

superimposed geology compiled from Kendall-Leioester's map.

The electrical readings were taken at 50 foot intervals along


-16-

traverse lines and the results plotted on Plan No. l3

expressed in ohm-centimeters x 10 ,

A total of 1^7 miles of lines were surveyed by the

electrical resistivity method which required ^013 station

readings.

The total area covered by the survey was approxi

mately 2,080 acres.

The number of eight-hour man-days required to

complete this work is as follows:

(8-hour) Attributable to Assessment Work

960

GO

276

Line cutting and chaining 2l|0 x 1|

Laying spread wire 20 x 1+

Operating Resistivity survey 69 x ?j.

Calculation fc Interpretation 20 x l±

Drafting l|8 x k

Office typing 6c Supervision ^28 x ij.

, **.t TOTALS

192

112

l700

r 0 ~i, v l'' -*

)Respectfully submitted,

QEO-TECHNICAL DEVELOPMENT COMPANY LTD.

April 23, Toronto, Ontario

K. P. Sheppard, Geologist


LEGEND

i LINES CUT AND CHAINED, RESISTIVITV READINGS OBSERVED

TV fT"'TruiD

ELECTRICAL RESISTIVITY ANOMALY

PROPOSED DRILL HOLE

OUTLINE OF HIGH GROUND

25 OHM - CM x 10

32 146-- "' A LOW GROUND 8. SWAMP AREA

CLAIM BOUNDARY AND C LA l M POST LO C A T l ON

DATA FROM GEOLOGICAL MAP BY ; KENDALL - LEICESTERMAPPED IN 1953

GEOLOGICAL CONTACT FROM GEOLOGICAL MAP

SHEAR ZONE FROM GEOLOGICAL MAP

FAULT ZONE " " "

GREATLAKES COPPERw* 32 147

LOCATION 8, IDENTIFICATION NUMBER OF TRENCH OR M l M ERA L SHOWING FROM GEOLOGICAL MAP

\ D RILL HOLE C LOCATION FROM GEOLOGICAL

STRIKE * DIP FROM GEOLOGICAL MAP

ELECTRICAL RESISTIVITY SURVEY OVER FOUNTAIN LAKE PROPERTY OF

MINES LIMITEDRESISTIVITY CONTOURS AND GEOLOGY

MOSS TOWNSHIP

DISTRICT OF THUNDER BAY

PORT ARTHUR MINING DIVISION

ONTARIO

GEOPHYSICAL SURVEY BY:

-TECHNICAL DEVELOPMENT COMPANY LIMITEDPLAN- NO.-lCENTER SECTION PART OF PROPERTY

MARCH-APRIL- 1954

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GEO-TECHNICAL DEVELOPMENT CO, LTD, ^WELLINGTON STREET … · ^WELLINGTON STREET WEST TO/ONTO,...

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