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42D16NW8826 6 3.558 MARTINET LAKE 010 REPORT ON MAGNETIC, ELECTRICAL RESISTIVITY and GEOLOGICAL JiECONKXJSSANCE SURVEYS C OK DUCT ISO OVER TWO GROUPS OP CLAIMS OP C ARAL MINING COM'ANY LIMITED TOWNSHIP 79 PORT ARTHUR MINING DIVISION ONTARIO Prepared by: J. D. McCannell, Geologist GEO-TECHNICAL DEVELOPMENT CO. LTD. 2)4 Wellington Street West, Toronto, Ontario. BED - TECHNICAt E:V E l,"P ;:P
Transcript
Page 1: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

42D16NW8826 63.558 MARTINET LAKE 010

REPORT ON

MAGNETIC, ELECTRICAL RESISTIVITY

and GEOLOGICAL JiECONKXJSSANCE SURVEYS

C OK DUCT ISO OVER TWO GROUPS OP CLAIMS OP

C ARAL MINING COM'ANY LIMITED

TOWNSHIP 79

PORT ARTHUR MINING DIVISION

ONTARIO

Prepared by:

J. D. McCannell, Geologist

GEO-TECHNICAL DEVELOPMENT CO. LTD. 2)4 Wellington Street West, Toronto, Ontario.

BED - TECHNICAt E:V E l,"P ;:P

Page 2: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

4aDi6Nwaeae ea.ssa MARTINET LAKE010C

R E P O K T INDEX

Introduction . . . . . . . . . . . . . . . . . . . . . . . . Page l .

Summary and Recommendations . ........ Page 1,2,3

Property . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3 ,k

Location and Access.................* Page [j.

Topography .......................... Page !|, 5

General Geology ....................* Page 5 to 9

General Discussion . . . . . . . . . . . . . . . . . . Page 9,10,11

Interpretation of the GeophysicalResults .....................* Page 11 to 15

Survey Data .......................o. Page 15 to l?

* # tt tt -x tt tt tt

PLAN NO. l ...,. Magnetic Survey data on WesternClaim Group. I so -dynamic contours of vertical magnetic intensities* (Drawing Ref. No. 5l-ll-#j.)

PLAN NO. 2 . .... Magnetic Survey data on EasternClaim Group. I so-dynamic contours of vertical magretic intensities. (Drawing Ref. No. 52-11-51+)

•li- tt tt X X X X tt

GEO - TECHNICAL DEVELOP M EN T C .O M f A NY .L l M 4 T*. D.

Page 3: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

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The Directors,Caral Mining Company Limited, 'Room 3Q1, l King Street''West,' \^^4^'^--^:: '-'-:-^ TORONTO, Ontario,

Gentlemen:

The following repbrt

surveys conducted over two

Company and located about

Marathon, Port Arthur Mining ]

amount of electrical resistiviljy;;'6il(

out in conjunction ^i^h tlie ̂

surveys were conducted

during the period September t

the result s are depld1bed'.'t)n,.F^ai^]^s^:'; :^

this report,

Summary and Recommendations

Due to the encoUragiJigj|^

•"^r

Several mining companies have

exploring known base metal occu

and in the vicinity of Bamoos g

The two groups of

Company Limited and discussed in 1|'

B e o - TECHNICAL D E V E L O P .JMJI *|T,

.. - 1 ' -.-: ' ' ;-ftli^'

Page 4: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

The West Group is located in Township 79 'and'the' "E'fit'Ssfi' "Grbup ; ";' : ' ! ' ;r

in unsurveyed territory immediately to the east. These

claims are further described as follows:

GROUP

Claim Nos. T. B. ^06l to 5^08? inclusive - 2? claims

EAST GROUP

Claim Nos. T. Bo 5503^ to 55060 inclusive - 2? claims

Lo c a t ion m and ̂ A c c e s s

The properties described in this report are located

approximately sixteen mi!b s northwest of the Town of Marathon,

which in turn is located on the north shore of Lake Superior

and 3 s a regular stop on the main line of the Canadian

Pacific Railroad. The most direct means of access to the

claims groups is by helicopter and Kenting Aviation Company

bases helicopters at Marathon for servicing the immediate

area. An alternate route is via Highway 17 west from

Marathon to Neys and then north over a road maintained by

the Ontario Paper Company to a point on the Little Pic

River approximately five miles north of Highway 17o About

four miles farther upstream a trail extends east from the

Little Pic River to the camp on the West Claims Group. The

distance from the Little Pic River to this camp is approx

imately three and one-half miles.

Topography

The topography of the general area is typical of

the Lake Superior north shore region and is characterized

G E O -TECHNICAL DEVELOPMENT COMPANY LIMITED

Page 5: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

- 5 .

by quite rugged relief. Some of the hills 6n the claims

Croups r:'se to elevations of five hundred feet above the

surrounding terrain. Most of the area is very heavily

timbered but there are sufficient rock exposures to permit

fairly detailed geological mapping. The entire area is

dotted with numerous small lakes and ponds connected by

a network of small streams and creeks.

General Geology

No detailed geological information has been

published covering this immediate area. Map No. Ij-lj,

Heron Bay-White Lake Area sheet, published by the Ontario

Department of Mines in 1932, shows the geology of the area

adjoining to the east in considerable detail. There is a

gap of eight townships between this map sheet and the

Schreiber Sheet, also published by the Ontario Department

of Mines.

Geological reconnaissance work was carried out by

Geo-'I'echnical Development Company Limited over the two

groups of claims described in this report. Considerable

geological information was acquired on the West Group, but

the lateness of the season only permitted an examination

of the rocks along the base line on the East Group*

Basic volcanics and what are believed to be

recrystallized arkosic sediments appear to be the oldest

rock types on the West Claims Group. These rocks have been

intruded by gabbro which is the most predominant formation

outcropping on this property. Red and pink syenite was

GEO -TECHNICAL DEVELOPMENT COMPANY LIMITED

Page 6: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

- 6 -

observed to cut all three above mentioned formations*

The volcanic rocks consisting largely of '

basalt flows predominate in the extreme northeast corner

of the West Claims Group, They are for the most part

quite magnetic and in places contain considerable finely

disseminated magnetite*

A rock type, believed to be recrystallized arkosic

sediments, contacts the basalt lavas on the West and under

lies most of the area north of the base line between lines

8-fOO E and 16*00 W. In places this rock is quite well banded

and somewhat gneissic. Although highly altered .and re

crystallized, there is still evidence of grain gradation

and much of vdiat appears to be gneissic banding probably

represents original bedding. This rock is largely composed

of feldspathic material with some quartz and minor ferro-

magnesium minerals.

The gabbroic rocks, by far the most extensive

formations outcropping on the West Claims Group, vary from

very coarse-grained almost pegmatitic gabbro to a medium-

grained diabasic type. This gabbro, especially the coarse-

grained variety, contains a considerable amount of coarse

magnetite and locally was sometimes found to contain over

fjO/'o magnetite. Where the gabbro is coarse-grained and

contains a high percentage of magnetite, the surface of the

rock is usually highly weathered and decomposed.

The finer-grained diabasic type is usually quite

fresh looking and In places suggests two periods of gabbro

intrusion. However, no actual contacts between the fine and

B E O - T E C H N l C A t DEVELOPMENT COMPANY LIMITED

Page 7: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

coarse-grained types were observed so it cannot be

definitely assumed that this condition is true.

Where there are no heavy concentrations of

magnetite, the coarse-grained gabbro is quite normal in

appearance and varies from low feldspar, high pyroxene

to almost pure anorthosite*

The gabbro formations underlie the south half

as well as the west portion of the West Claims group*

vScattered outcrops of this rock were also observed along

the north boundary suggesting small dikes of this formation

cut the basic volcanics and recrystallized arkosic sediments,.

Contacts between the gabbro and basalt lava were observed

along the base line east from line 8-rOO E to line 20-rOO E.

An outcrop of arkosic sediments 800' north md about 50'

east on line 21+00 W includes dikelets of gabbro indicating

the gabbro to be later than the recrystallized sediments*

This condition is also evident in numerous outcrops on

line 28+00 W north of the base line. The contact between

the sediments ar. d gabbro intrusive probably occurs in the

vicinity of this line as there is considerable contamination

of the sediments by the gabbro in this area,

Red and pink syenite, for the most part quite

coarse-grained, was observed to cut all three above

mentioned rock types* Although this syenite predominates

in the area north of the base line between lines 2i(.*00 W

and 16+00 W, isolated occurrences probably representing

dikes wore observed throughout the claims group.

GEO -TECHNICAL DEVELOPMENT COMPANY LIMITED

Page 8: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

\ - . . -. '.' v ..^ : *; - r, 1 , 11 .' 1 '-', 4* *.v * y* 1 " ..'--.^ n-T'.:f*f-v,3.^v- av-,. v :- * * vrf VV'--VA --' - 1 .! f/v-*''v". J' i ! ' ta' 'fi v'i ' ?;v ' :- -^V* l- : - -''" : ; i 1-^^^V'^s^v^^^r^^ v^;^:J:j

. At . . , .At a point

fifteen foot red

well exposed in a re

and dips vertical."

at 16?5 feet south on line

south. These two outcrops

striking in a northeast ;i

south on line 2lj*,pO W,

red syenite is exposed in a

:wera observed as no outerops^;w||eg^p||||i^

^•^^^^M^iK^ii^i^^^^^mmm•- 'A W'*{j-^ *!.' '/-.'.'r i 'j

., .,...... ........... .. ,...iWl!Mllsize which possibly follows ^^

immediately south of the

Numerous outcrops bf

near the base line iri the vioijllS

211+00 W. Syenite is also

as far as the north tie line*''

suggest adike several hundred

to northeast direction

arkosic sediments. A large

cutting the arkosic

1^+00 W.

Dikelets and

in the gabbro indicate the

Q E O

Page 9: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

- 9 -

An indication of intrusive action later than the

syenite was observed lj.0 feet east of 12*00 N on line 20+00 W

where a lamprophyre dike, several feet wide and showing a

perfect chilled contact, cuts the syenite.

Adverse weather conditions prevented a geological

reconnaissance survey over the entire East Group. However,

a traverse was made along the base line and this part of the

claims group was found to be largely underlain by sedimentary

formations with considerable basic and siliceous lavas

especially in the area between lines 21^00 E and 32*00 E.

Both the volcanic and sedimentary rocks have been intruded

by coarse-grained gabbro similar to that found in the West

Group as well as by minor aplite and lamprophyre dikes. It

is possible that the aplite dikes are related to the syenite

intrusive which is quite prevalent in the area of the West

Claims Group 0 The gabbro observed on the East Group also

contains a considerable amount of disseminated magnetite.

G ene ral Di s cu s s i on

Formerly there has been very little prospecting

activity in the area in which the claims groups discussed in

this report is located. However, the development of the

Manitouwadge area situated about forty miles to the no? theast

has attracted considerable attention to the general area aid

the known mineral occurrences have been staked and many are

presently being explored by diamond drilling arid geophysical

methods.

GEO -TECHNICAL DEVELOPMENT COMPANY LIMITED

Page 10: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

- 10 ~

The Pic River area located about eight miles to

the southeast of the Caral Mining Company Limited claims

and where sulphide occurrences have been known for several

years is presently being actively explored. This activity

has attracted considerable mining interest and claims have

now been staked within a radius of several miles and include

the area where the Garal Mining Company Limited groups are

located.

The chief mineralized showing observed on the

claims groups discussed herein is massive magnetite occurring

in well-weathered, coarse-grained gabbro. This showing is

located at the north end of the "A" anomaly on the West

Group and immediately south of the small lake. Trenching

alone the foot of a steep hill at this point has exposed

a seam of almost massive magnetite about three feet wide

carrying a small amount of pyrite and chalcopyrite. A

sample of this material is reported to have assayed i}.?.67^

iron, Q .Qltft copper and 6.9l|-/^ titanium,, A second and somewhat

similar showing has been trenched about 600 feet to the

northitfest just south of the base line and about midway

between lines 00+00 and 1^+00 IV. Other magnetite occur

rences were observed during the geological examination

conducted by Geo-Technical Development Company Limited. One

of these is located about 75 feet north of the base line at

15*00 W and another 21^30 feet south on line 12+00 W.

Heavy pyrite mineralization was observed near the

contact of the syenite and gabbro a few feet north of the base

line at 25+00 W. At this point a limited amount of stripping

ED - T E C H N l C A t D E V E t O P M E N T C O M P A N V U l M l ,T E,D

Page 11: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

- 11 -

exposed pyrite gossan over a width of three feeto The

outcrop dips under a deep draw and it was not possible to

determine the limits of the pyrite mineralization by surface

stripping. Pyrite mineralization was also observed immedi

ately west of 1^*00 N on line 8*00 E e At this point the

mineralization occurs in a syenite or aplite dike which

contacts the recrystallized arkosic sediments.

Interpretation of the Geophysical Results

The results of the magnetometer survey and electrical

resistivity check work conducted over the West Claims Group

are depicted on Plan No* l accompanying this report. The

magnetometer readings, expressed in gammas, are shown to the

oast of the traverse lines and the resistivity readings,

expressed in ohm-centimeters x 10^, are shown to the west.

The magnetic readings over the entire claims group

are quite high suggesting the presence of appreciable

magnetite occurring as a constituent mineral in the under

lying formations. This condition is especially true over

the areas underlain by gabbro and basaltic lavas. Although

the arkosic sediments and syenite are much more magnetic

than might normally be expected, they stand out as magnetic

"lows" relative to the readings over the gabbro and basalt

rocks. Small isolated highs within the areas observed to

be underlain by the sediments and syenite probably

represent small dikes or fingers of the gabbro intrusions.

The areas over which very high positive as well as

high negative magnetometer-readings were obtained were

GEO- TECHNICAL DEVELOPMENT COMPANY LIMITED

Page 12: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

- 12 -

examined in detail in an effort to determine the reason for

the high magnetic reaction* In all cases high percentages

of magnetite were observed in the underlying formations.

It was found that high negative magnetic readings were as

important as high positive magnetic readings as indications

of the presence of magnetite* The high negative readings

are apparently the result of di-polar effects.

The magnetite concentrations occurring on the

property appear to be small, lenticular masses confined to

fracture and shear zones. In the majority of magnetic

anomalies, such as the ones occurring near the south ends

of lines 20*00 W and 32400 W, where negative readings of

over 20,000 gammas were obtained, considerable magnetite

was observed but the mineralization is too finely dissemin

ated to constitute ore material. This same condition exists

1000 feet north on line 12*00 W and in the vicinity of the

base line at 2l|400 E.

The most significant anomalous zone outlined by

the magnetometer survey occurs south of the base line between

lines 1|-400 W aid 12+00 E, In this section the magnetometer

survey indicated a northwest-trending anomaly identified on

Plan No. l as the "A" anomaly and showing readings in excess

of 18,000 gammas. High negative readings were obtained

in this section indicating considerable di-polar effectso

The main showing observed on the property to date

is located near the northwest end of this anomaly. The topo

graphy in this section is rugged and cut by a series of deep

draws believed to represent fault or shear zones. The area

GEQ - TECHNICAL DEVELOPMENT COMPANY L, M, TED

Page 13: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

~ 13 -

is underlain by highly magnetic gabbroic rocks and it is

quite possible that some of the assumed shear or fault

structures could provide favourable conditions for the

concentration of magnetite. The magnetometer results and

the geological examination suggest however that any magnetite

deposits in this section will occur as small lenticular

masses,.

From the geological investigation conducted in

conjunction with the geophysical work, it was found that

10 or 13/0 magnetite in the underlying formations could

produce high magnetic readings but would not necessarily

suggest the presence of ore material. This condition is-*"'

especially true where the concentration of magnetite is

confined to a small area. Several of these small anomalies,

often only indicated by one high magnetic reading, occur

throughout the surveyed area.

The electrical resistivity survey conducted over

the West Group was confined to limited areas in an effort to

provide further geophysical data to aid the interpretation

of the magnetometer results. A small amount of resistivity

work was conducted in the vicinity of line 23.j.tOO in an effort

to determine the extent of the sulphide mineralization

observed immediately north of the base line at 25rOO W.

The readings obtained in this section were for the most part

quite high and did not suggest any appreciable extent to

the observed sulphide mineralization. Similar conditions

were indicated in the vicinity of the sulphides observed at

llj.00 feet north on line 8+00 E.

BED - TECHNICAL DEVELOPMENT COMPANY LIMITED

Page 14: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

The entire area south of the base line and lying

between line Ij.-tOO M and the east boundary of the claims

group was surveyed by the electric resistivity method. The

readings over- this section especially those in the vicinity

of the "A" anomaly located south of the lake, indicate

several local conducting trends interpreted as representing

shearing or faulting. The topography in this immediate

section is characterized by numerous deep ravines and gulleys

conforming to no particular strike but believed to represent

fax It or shear lineaments. In several cases highly weathered

and decomposed coarse gabbro carrying a high percentage of

magnetite was observed along the slopes of these depressions.

The presence of this highly weathered gabbro is further

evidence suggesting the presence of faulting or shearing.

No resistivity readings were observed that could bo con

sidered as indicative of heavy sulphide mineralization.

The results of the magnetometer survey conducted

over the Fiast Group are depicted on Plan No. 2 accompanying

this report. No resistivity surveying was carried out in

conjunction with the magnetic work over this group. The mag

netometer readings obtained over this claims group were for

the most part considerably lower than those obtained over

the West Group, although several small isolated anomalies

showing quite high readings were observed. These anomalies

are largely confined to one or two high readings such as the

ones observed at 1700 and 2000 feet south on line 16400 E,

Two high anomalies with a di-polar effect between them were

observed at the south end of line 1(41-00 E. A strong di-pole.'

BED- TECHNICAL D E V E L O P M E N T COMPANY LIMITED

Page 15: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

- 15' -

was also observed at 2200 feet SDUth on line 52+00 E.

The geological reconnaissance work conducted along

the base line on this claims group indicated the underlying

rocks to be largely sediments Intercalated with basic to

acidic lavas. These formations have been intruded by gabbro

similar to that found on the West Claims Group. The presence

of magnetite as a constituent mineral in the gabbro could

have caused the high isolated anomalies mentioned above.

No magnetic anomalies were observed throughout this claim

group suggesting the presence of appreciable concentrations

of magnetite.

The wide difference in the magnetic properties of

the underlying rocks on the i^ast ClaimsG-roup in all proba

bility reflects the variation in the amount of magnetite

present. The magneti te content varies considerably with the

different rock types and even in the same rock there is often

a marked difference in the amount of this mineral present.

This latter condition often makes it very difficult to

establish geological contacts from magnetometer readings

unless considerable geological information is available.

Survey Data

Magnetometer surveys were conducted over two groups

of claims held by Caral Mining Company Limited and located

in the Port Arthur Mining Division, Ontario. The West Group

of claims i s located at the extreme northeast corner of

Township 79 and the ttast Group, one half mile to the east in

unsurveyed territory,, A small amount of resistivity work was

GEO -TECHNICAL DEVELOPMENT COMPANY LIMITED

Page 16: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

conducted with the magnetometer survey on the West Claims

Groupe Geological reconnaissance surveys were conducted

over both claims groups during the course of the geophysical

work.

All the above mentioned surveys were conducted by

Goo-Technical Development Company Limited during the period

from September 8th, 19^1- to November Jj.th, 195^ and the

results are shown on Plans No. l and 2 accompanying this

report. Plan No. l shows the results of work conducted over

the West Claims Group and Plan No. 2 the work over the East

Group. Both claims groups include twenty-seven claims each,

comprising approximately 1080 acres in each group.

An east-west base line established through the

West Claims Group was extended across the iiast Group.

Traverse lines were turned off this base line at ij.00 foot

Intervals. Magnetometer readings were taken at 100 foot

intervals along these north-south traverse lines. These

readings expressed in gammas are plotted to the east of the

traverse lines on the accompanying plans. Where electrical

resistivity surveying was carried out the readings were taken

at 50 foot intervals and,expressed in ohm-centimeter s x 10^,

are plotted to the west of the traverse lines.

On the West Claims Group 20.72 miles of line were

surveyed by the magnetometer method and )|..^9 miles by the

resistivity method. The magnetometer work required 10^!|

station readings and the resistivity work l \.Q^ station

readings. On the East Claims Group 19.39 miles of line were

surveyed by the magnetometer method requiring lOOlj. station

BED -TECHNICAL DEVELOPMENT COMPANY LIMITED

Page 17: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

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Page 18: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

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TOWNSHIP - 79

DISTRICT OF THUNDER - BAY

ONTARIO

MAGNETIC SURVEY BY

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—l

LEGEND

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*| BASALT L AVA

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Page 19: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

LEGEND

MAGNETIC BASE: CONTROL STATION

LINES CUT AND CHAINED MAGNETIC READINGS OBSERVED

MAGNETIC CONTOUR

READINGS PLOTTED ON WEST SIDE OF LINE GRID

RESISTIVITY CONTOUR

GEOLOGICAL CONTACT INFERRED AND OBSERVED

B ' T.fc i T. 6T-6 T. os Tft T.& 55081

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Page 20: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

LEGEND

MAGNETIC BASE CONTROL STATION

LINE5 CUT AND CHAINED M AGNETIC R EADINGS OBSERVED

MAGNETIC CONTOUR

WfSMfTWtTY READINGS PLOTTED ON WEST SIDE OF LfNE GRID

RESISTIVITY CONTOUR

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42DI6N#e026 63.550 MARTINET LAKE

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Page 21: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

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Page 22: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

LEGEND55o5l i 55051;

MAGNETIC BASE CONTROL -STATION

LINES CUT AND CHAINED MAGNETIC READINGS OBSERVED

MAGNETIC CONTOUR

MMTtVtTY R EADINGS PLOTTED ON WEST SIDE OF LINE GRID

RESISTIVITY CONTOUR

GEOLOGICAL CONTACT INFERRED AND OBSERVED

FAULT OR SHEAR

ARKOSE C RECRYSTALLIZED SEDIMENTSSORtVEYED

C PLA^ NO.2])

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HEADS OF THE LAKES l RON

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500 - !000

1000 - 20OO

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5072

55074

CARALMAGNETIC SURVEY DATA ON WESTERN CLAIM GROUP OF PROPERTY OF

MINING COMPANY LIMITEISO-DYNAMIC CONTOURS OF VERTICAL MAGNETIC INTENSITIES

AND IN PART ELECTRICAL RESISITIVITY SURVEY DATA AND GEOLOGY

"rf lTOWNSHIP - 79

DISTRICT OF THUNDER- BAY

ONTARIO

GEOPHYSICAL AND GEOLOGICAL SURVEY BY ;

GEO-TECHNICAL DEVELOPMENT COMPANY LIMITEDPLAN NO- OCT. - 1954

SCALE: T- 200'200 loo' So' Apo Soo 800' tcoo

Page 23: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

LEGEND55o5l l 55051-,

MAGNETIC BASE CONTROL STATION

LINES CUT AND CHAINED MAGNETIC READINGS OBSERVED

MAGNETIC CONTOUR

READINGS PLOTTED ON WEST SIDE OF LINE GRID

RESISTIVITY CONTOUR

GEOLOGICAL CONTACT INFERRED AND OBSERVED

FAULT OR SHEAR

C RECRYSTALLIZED SEDIMENTSSUREYED

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N PART ELECTRICAL RESISITIVITY SURVEY DATA AND GEOLOGYAN D

0

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DISTRICT OF THUNDER-BAY

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GEOPHYSICAL AMD GEOLOGICAL SURVEY BY

GEO-TECHNICAL DEVELOPMENT COMPANY LIMITEDPLAN NO- OCT. - 1954

SCALE: i"- 200'So' toe' So' T ill

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SI -1 I-S4

Page 24: Prepared by: J. D. McCannell, Geologist · of feldspathic material with some quartz and minor ferro- magnesium minerals. The gabbroic rocks, by far the most extensive formations outcropping

LEGEND

f r i i w - t r i f * f T r r M ir r

55o5^i 55 058- MAGNETIC BASE CONTROL STATION

LINES CUT AND CHAINED M AGNETIC R EADINGS OBSERVED

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TOWNSHIP - 79

DISTRICT O F THUNDER- BAY

ONTARIO

GEOPHYSICAL AND GEOLOGICAL SURVEY BY :

UP GEO-TECHNICAL DEVELOPMENT COMPANY LIMITEDPLAN NO-l OCT. - 1954

SCALE: T'- 200'toco


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