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52G14NE8866 52GI4NE8e51 PENASSI LAKE 010
REPORT
O N
MOUNTAIN ISLAND BAY CLAIMS PATRICIA MINING DIVISION
ONTARIO
June 12, 1970 W. G. Wahl Limited
Suite 1101, 302 Bay Street, Toronto 105, Ontario
June 12, 1970.
Mr. A. C. Mosher, President, Chimo Gold Mines Limited, Suite 1000, 11 Kinj Street West, Toronto l, Ontario.
Dear Mr Mosher:
Submitted herewith is a report on;
MOUNTAIN ISLAND BAY CLAIMS PATRICIA MINING DIVISION
ONTARIO
Ground geophysical surveys mapped two anomalous zones which are thought to be caused by infolded bands of conductive sediments. It is recom mended that the geophysical reports be filed for assessment credit.
2.
GENERAL
The Mountain Island Bay area of Sturgeon Lake is
located approximately 45 miles north of Ignace on Highway 599.
The survey was run over the following mineral claims:
218537^21854^ 218551- 218554'^ ^ ^
218541^ 2185.49' 218552 218555'
218545^ 218550 , 218553
which are held under option by Chimo Gold Mines Limited with
Mr. J. McNeil.
The geology of this area is shown as Geological Map
No. 2169 "Sioux-Lookout - Armstrong Sheet" by the Ontario
Department of Mines. Airborne magnetometer data covering this
'area is published in Geophysical Paper 1127-G "Witcomb" by the
Geological Survey of Canada. This area is coded under the
National Topograph Series 52-G-14.
A grid system comprising of 54,000 feet including tie
lines was carried out under the supervision of Mr. K. Kuhner
of Thunder Bay, Ontario, during the first week of May, 1970.
The baseline trends east-west with picket lines trending
north-south at 400 foot intervals. One hundred foot stations
were established on all lines.
3.
MAGNETOMETER SURVEY
The ground magnetometer survey was completed under
the direct supervision of D. G. Wahl, P.Eng., during the period
of May 18 to May 20, 1970. A Barringer GM 102 Magnetometer with
a sensitivity of 10 gammas recorded the total field magnetic
intensities at fifty foot intervals on all lines, in excess
of 900 stations were occupied.
The magnetic data was reduced to a local datum and
adjusted for magnetic diurnal. The data is presented on the
enclosed maps as corrected station values and as a contoured
interpretation of thece data.
The andesite flows have a low magnetic susceptibility
but are characterized by linear, trending anomalies marking
individual flows.
The pyroclastic rocks have a moderate magnetic
susceptibility in the range from 400 gammas to 800 gammas.
Associated with the pyroclastic rocks are strong
elongate units having a magnetic susceptibility range from 1000
to 1500 gammas. These elongate units are thought to be tuffs.
The syenite intrusive is characterized by very low
uniform magnetic susceptibility.
'"I
EM SURVEY
The electromagnetic survey was conducted by D. G. Wahl,
P.Eng., during the period from May 18 to May 20, 1970, employing
a Crone Radam VLF EM Survey Unit. This unit measured the
inclination or dip and the total field intensity with a sen
sitivity of l 0 of dip and 196 field intensity. The VLF station
used is located at Seattle, Washington, having a frequency of
18.6 KHz- All observations were taken facing w^st. Stations
were occupied at 50 foot intervals on the established grid.
Two conductive zoner. were mapped lying within the
andesitic flows. These anomalous areas will be discussed in
detail in a following section of this report.
GEOLOGY
The geology as published by the Ontario Department
of Mines was extended and defined by the geophysical surveys
and a compilation of the data is appended.
The property occupies a portion of the north limb
of an easterly plunging syncline of intercalated flows and
pyroclastic rocks. The rocks dip gently into the syncline but
the symmetry of the syncline is interrupted by an anticlinal
roll trending approximately east-west. This anticlinal roll
* l
e
it is felt might be the surface expression of the syenite
intrusive in the Mountain Island Bay area. 7* portion of
syenite intrusive outcrops on the shore of Mountain Island
Bay. This intrusive is also defined by the magnetometer survey.
The attached map shows the rocks and rock structures
as inferred from the field surveys.
ANOMALY l
This anomaly is located approximately 1000 feet
south of the baseline roughly paralleling the contact between
the andesite flow and pyroclastic rocks. It is characterized
by an increasing field strength accompanied with a strong dip
reversal. Anomaly l exhibits a very low magnetic susceptibility.
Attached is a section showing the inferred geology. This
anomalous zone is thought to be caused by an in-fold of con
ductive sediments.
ANOMALY 2
In general an increase in field strength is directly
related to an increase in the conductivity of the underlying
surficial debris and bedrock and is inversely related to the
resistivity of the causative body. It is felt that the clay
filled valley of Ethlouise Lake causes the increasing field
strength in the area of Anomaly 2. The possibility also exists
fi
i l
6.
~
that this anomalous zone could be similar in structure to that
of Anomaly l, representing the southern infold of the conductive
sedimentp flanking the anticline.
All of which is respectfully submitted.
Sincerely yours,
W. G. WAHL L
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SPEQAL PRO 52GMNEee66 ssGHNEeesi PENASSI LAKE
ASSESSMENT WORK DETAILS
Type of Survey.
Chief Line Cutter orA M^nU form li required for *och typ* ol *unr*y
Mr. K* Kuhner __ Thunder BayNome Addr***
Party Chief
Consultant.
D. Q. Wahl. P.Eng. Toronto OntarioNom* Addrett
W. O. Wahl, T. -TorontoCOVERING DATES Line Cutting.
Addr**iMay 8 to May 14. 1970
Field Geology or Geophysic, May 18 to May 20.1970
Office Juna A to June 6 P 1970^---——.^^
900
' INSTRUMENT DATA Make, Model and Type G. M. 102-A
Scale Constant or Sensitivity 10 qnnunaaOr provide copy of instrument data from Manufacturer's brochure.
Total Number of Stations Within Claim Group . 050 -Number of Miles of Line cut Within Claim o* J. o
ASSESSMENT WORK CREDITS REQUESTED Geological Survey. .Days per Claim
Geophysical Survey—-*.::!— Days per Clnim
MINING CLAIMS TRAVERSED
218537 218546
218541 2 J P54Q
218545 218550
218551 218554
?1855? 210555
218553
DATE- June 23. 1970.
TfTTAl. 1]
f /' i / ' '.SIGNED t \ . f. ( ' '
Special provision credits do not apply to ftadiometric Surveys.
IP-Typo of Survey.
SPECIAL PROVISION
ASSESSMENT WORK DETAILS
GEOPHYSICAL - ELECTROMAGNETICA ••potato fotm l* required for •ocl, /p* of *urv*y
Chief Line Cutter or r. nr* T.*tnf Mr. K. Kuhner___________ThunderNorn.
Party Chief. D, Q. Wahl,P.Eng Toronto OntarioNorn* Addr*ti
Consultant. u. n. ar
COVERING DATES Line Cutting.Nan*
May 8 to May 14, 1970Addrci*
Field Geology or Geophysics .
Office Juno 4 to June 6, 1970
May 18 to May 20, 1970
INSTRUMENT DATA Make, Model and Type . Crone VLF - EM Radem
Scale Constant or s^.i.iv;.,, l* of dip and 1*4 of total field strengthOf provide copy of instrument data from Manufactnur's brochure.
850 8.16 Total Number of Stations Within Claim Croup ———————Number of Miles of Line cut Within Claim Group—————.
ASSESSMENT WORK CREDITS REQUESTED
MINING CLAIMS TRAVERSED
218537 218546
Geological Survey. .D ay B per Claim
Geophysical Survey——20— Days per Claim
218551 218554
218541 218549 218552 218555
218545 218550 218553
DATE June 23. 1970
TOTAL
SIGNED ^f y \ x
Special provision credits do not apply to Radiometric Surveys.
63.2359
:- 416 f:^ TEirPHOriE- 365-691*
ON
MlUilir. (Mil) ; I-II.MI. .11
February 5th, 1971.
Mr. W.A. Buchan, Mining Recorder, Court House, Sioux Lookout, Ontario.
Re: Mining Claim No. PA. 2185^5 et al,South-West Part of Sturgeon Lake Area
Dear Sir:
The Geophysical (Kagnetometer and Electromagnetic) assessment work credits as listed with my Notice of Intent dated January 20th, 1971, have been approved as of the date above. Please inform the recorded holder and so indicate on your records.
Yours very truly,
Fred W. Matthews, Supervisor, Projects Section.
c * c. Chimo Go3.d Mines Ltd., 1000 - 11 King St., W., Toronto, Ontario.
c. c, W. G. Ytahl Ltd., Suite 1101, 302 Bay Street, Toronto, Ontario.
c. c, Mr. H. L. King,Resident Geologist, ^08 Robertson Street Kenora, Ontario.
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SEE ACCOMPANYING MAP(S) IDENTIFIED AS
LOCATED IN THE MAP CHANNEL IN THEFOLLOWING SEQUENCE
(X)
t*''y. . ^
I^te^xsafe ,;: ," ;.:. -. -;... ••• i A--V- . ,: mm- ; —^ -K&*?--'.-
k, FOR ADDITIONALE
H-.1 -.'' INFORMATION
SEE MAPS:
6 1 A/ Mt- 00 5
212845
218555
2.18553
2\855218552
218550
--No 3 of
1855
No ^ fcrei8549
218546
218545
MOUNTAIN ISLANDBAY
STURGEON LAKE
2.18541
LEGEND
SrENlTE
PYROCLASTIC ROCKS
FLOW
SYMBOLSETHLOUISE LAKENFERRED CoNTACT
FOLD
CoMoucT\vE ZONE
c- -0051 *l
-v Si Sr S?CHIMO GOLD MINES LIMITED
GEOLOGYMOUNTAIN ISLAND PROJECT
WGWAHL LTD JUNE 4 197052G14NEW66 52G14hEe051 PENASSI LAKE
MOUNTAIN ISLANDBAY
STURGEON LAKE
ETHLOUiSE LAKE
CHIMO GOLD MINES LIMITEDMAGNETOMETER SURVEY
MOUNTAIN ISLAND BAY PROJECT5CAL E : l INCH TOEOOFfET FIELD VALUES JNGAMWA5
WGWAHL LTD. JUNE 4,1970S2G14NE8666 S2GI4NE8051 PENASSI LAKE
MOUNTAIN ISLANDBAY
STURGEON LAKE
ETHLOUISE LAKE
CHIMO GOLD MINES LIMITEDMAGNETOMETER SURVEY
MOUNTAIN ISLAND BAY PROJECTSCALE : l INCH TO SOD FEET CONTOUR INTERVAL IOO
WGWAHL LTD. JUNE 4.197052G14NE0866 52G14NE8851 PENASSI LAKE
MOUNTAIN ISLANDBAY
STURGEON LAKE
ETHLOUISE LAKE
DIP NCH TO ao DEGREES
CONTOUR INTERVAL: SS'/oNORMAL FIELD STRENGTH
CHIMO GOLD MINES L MITEDE M
MOUNTAIN ISLAND P
vV.GVVAHL LTD Mf 4I9?052G14NE0966 52G14NE*a5t PENASSI LAKE