report on the magnetic and electromagnetic surveys … · 2017. 1. 17. · 4acessw0ie7 e04s...
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4acessw0ie7 e04s JACOBSON ,, 010
REPORT ON THE
MAGNETIC AND ELECTROMAGNETIC SURVEYS
MEATH PROJECT, GROUP C
JACOBSON TOWNSHIP
MISSANABIE AREA, ONTARIO
FOR
AU6 2 6 1983
MINING LANDS SECTION
MATTAGAMI LAKE EXPLORATION LIMITED
MAY, 1982 BY: D.B. SUTHERLANDCONSULTING GEOPHYSICIST
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42C88SW0ie7 eC45 JACOBSON
INDEX
INTRODUCTION l
LOCATION S ACCESS l
GENERAL GEOLOGY 2
SURVEY INSTRUMENTS 3
DISCUSSION OF RESULTS 4
SUMMARY S RECOMMENDATIONS 4
POCKET l - MAGNETIC COMPILATION Scale: l" = 2 00'
2 - ELECTROMAGNETIC MAP
400' SEPARATION, 1777 Hz l" = 200'
3 - ELECTROMAGNETIC MAP
400' SEPARATION, 444 Hz l" = 200'
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- l -
INTRODUCTION
Group C is a 4 claim group staked to investigate
an isolated, 4 channel, Airborne response. A grid of N-S
lines, spaced at 400 foot intervals, has been cut over the
claims. Surveying has been carried out with magnetics and
electromagnetics over approximately 1.8 line miles of picket
line. The surveying was carried out by the crews of Mattagami
Lake Exploration Limited on March 25th, 1982.
LOCATION AND ACCESS
The Missanabie area, which for the purpose of this
study, covers thirteen townships, is located about 40 kilo
meters northeast of Wawa and about 208 kilomters' north of
Sault Ste. Marie. The area is readily accessible by road
and rail. The town of Missanabie is accessible by Highway
651 which joins Highway 101 to the south, about 65 km east
of Wawa. The town of Goudreau is accessible from Wawa, via
an indirect route from the north which connects to Highway 11.
Gravel surfaced roads or more commonly rough lumber
ing roads provide access to much of the area from the town of
Missanabie and Goudreau which themselves are not connected.
Missanabie in West township and Lochalsh in the
northwest part of Riggs township, are on the Canadian Pacific
Railway. In the western part of the Missanabie area, the
Algoma Central Railway services Goudreau and Dubreuilville.
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Group C lies in the SE corner of Jacobson Township
about 4 miles south of the Goudreau Highway.
GENERAL GEOLOGY
The Missanabie area is predominantly underlain by
rocks of early Precambrian age. Thick and complex volcano
genic accumulations of subaqueous mafic flows and pyroclastic
rocks, felsic to intermediate pyroclastic rocks, and locally
derived metasediments underlie most of the area. This meta-
volcanic belt is a part of the northeastern extension of the
Michopicoten metavolcanic-metasedimentary belt. Minor iron
formations are present at the top of the mafic metavolcanic
sequence.
Complex grantic batholiths consisting predominantly
of folidated to gneissic granodiorite and trondhjemite, border
and intrude the metavolcanics on the north, northwest and
central south regions of the Missanabie area. Small stocks
and sills of quartz-feldspar porphry and granite, and several
large granodiorite stocks also intrude the metavolcanic units.
A single hornblende syenite stock intrudes the metavolcanics
at the border of Meath and West townships. Probable sills
occur as elongated masses of dioritic rocks in the meta
volcanics of the southwest townships.
Both the metavolcanic-metasedimentary sequence and
the granitic batholiths are cut by abundant north to north
west trending diabase dikes, a few northeast trending diabase
dikes a prominent northeast trending quartz diorite dike, a
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fairly large olivine-rich gabbro stock in Riggs Township, as
well as several small ultramafic stocks and sills.
Unconsolidated Pleistocene sediments, consisting
of ground and terminal moraine and glaciofluvial and glacio
lacustrine deposits are extensive.
The metavolcanic-metasedimentary rocks are metamor
phosed to lower greenschist facies in the interior of the belt
and to high greenschist-lower almancine-amphibolite facies
near felsic intrusive rocks.
Structural information in the mafic and felsic meta-
volcanic and metasedimentary belt is sufficient for structural
interpretation in only some regions of the Missanabie area.
The identifiable fold pattern appears consistent with the
general folding of the whole Michipicoten belt, however,
locally fold trends have been controlled by and certainly
complicated by the intrusion of granitic rocks.
SURVEY INSTRUMENTS
A direct reading McPhar Fluxgate instrument was
used to measure the vertical field to an accuracy of 10
gammas.
An apex MaxMin II electromagnetic unit was used
for the horizontal loop survey. Operating frequencies were
444 and 1777 Hz with a coil separation of 400 feet. The in-
phase and quadrature components were measured to an accuracy
of l \ o f the primary field.
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DISCUSSION OF RESULTS -
A single, short conductor, Zone A has been inter
preted from the electromagnetic data. It displays a depth
of 220 feet at the high frequency, but only 160 feet at the
low. The indicated conductance is 30 mhos at 1777 Hz, but
only 12 mhos at 444 Hz. This may be due to overburden inter
ference but in any case, the lower frequency estimate of 12
mhos is considered the more reliable.
Zone A appears to terminate near 12E where a 1000
gamma magnetic high trends NNW across the grid. The magnetic
high probably indicates a diabase dike and Zone A may term
inate at this structural feature.
Because of its low conductance and short strike,
Zone A is considered a second priority target.
SUMMARY S RECOMMENDATIONS
Zone A is a short, E-W trending conductor that
correlates closely with an isolated Airborne Anomaly 710-C.
It does not correlate with any strong magnetic features, but
the west end of Zone A appears to terminate near a strong NNW
magnetic high which probably represents a dike.
Zone A displays a conductance of only 12 mhos and
a strike length of 400 to 600 feet. Consequently, it is regarded
as a second priority target.
Respectfully submitted
X
D. B. SUTHERLAND CONSULTING GEOPHYSICIST
x
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MAY, 1982 .
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Ministry ofNaturalResources
Ontario
GeotechnicalReportApproval
File
Mining Lands Comments
To: Geophvsto -AComment!
[IjfApproved With to tee again with correction*Slgnatu
DTo: Geology - ExpendituresComm*nti
fj Approved Q W ith lo M* again with corrtctlontSignature
To: Geochemistry
Comment!
Approved [J W ith to lee again with correction*Signature
-: f|To! Mining Lands Section, Room 6462, Whitney Block. (Tel: 5-1380)
( ; 1693(81/10)
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Ontario
Ministry of Natural ResourcesGEOPHYSICAL - GEOLOGICAL - GEOCHEMICAL
TECHNICAL DATA STATEMENT
File.
TO BE ATTACHED AS AN APPENDIX TO TECHNICAL REPORTFACTS SHOWN HERE NEED NOT BE REPEATED IN REPORT
TECHNICAL REPORT MUST CONTAIN INTERPRETATION, CONCLUSIONS ETC.
GeophysicalType of Survcy(s) - Township or Area . Claim Ilolder(s) _ Mattagami Lake Exploration Limited
Jacobson
Mattagami Lake Exploration Limited Author of Report , D - B - Sutherland -——————————— Address of A..trmr 9?5 Mt. Pleasant Road. TorontoCovering Dates of Survey.
Total Miles of Line
March 2 5 t O 1982(lineculting to office)
2.5
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———Other—.————
DAYSper dura
40
20
Geological.Geochemical.
AIRBORNE CREDITS (Special pioviiion credit* do not apply to airborne lurvcyi)
Magnetometer. .Electromagnetic . Radiometric
DATE:
(enter daft per claim)
SIGNATURESAuthor of Report or Agent
Res. Gcol.. Qualifications o
Previous Surveys File No. Type Date Qaim Holder
GROUP C
MINING CLAIMS TRAVERSED List numerically
SSM .63.5.84.9...(number)
633849
633850
633851
.RECEIYI.D
TOTAL CLAIMS.
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GEOPHYSICAL TECHNICAL DATA
GROUND SURVEYS — H more than one survey, specify data for each type of survey
Number of Stations M a S- Station interval. 1 00 ' ' 5 0 '
Profile scale ______ Ll
^ E- M - 99 .Number of Readings ,Mag. 169; E.M. 596 ^Line spacing___^00 —-^.-——^________
Contour interval 2 SO gamma^
OH W 23 C
S
McPhar Gluxgate
10 gammasGraphical
Instrument .—- Accuracy — Scale constant Diurnal correction method Base Station check-in interval (hours)———T.^f?————————-—.——--———-——-—-———--.- Base Station location and value Readings were tied in to predetermined,
base line stations
oSzo <5 O t*
w*m
Instrument Apex MaxMin IICoil configuration Coil separation — Accuracy ____. Method: Frequency___~.
Horizontal Loop _____ - -400
i nD Fixed transmitter
444 and 1777 HzD Shoot back In line D Parallel line
Parameters measured_.(ipccify V.I.F. station)
aturc
c*d
Instrument m
Scale constantCorrections made _._.__.._____—
Base station value and location
Elevation accuracy—
H
UJf at
InstrumentMethod D Time Domain Parameters - On time __ ——— ..
~ O ff time- Delay time .-.—-
- Integration time
PowerElectrode array Elcctrodle
D Frequency Domain
Frequency ———— , .,
— _ . _ Range
Type of electrode ~ _ —
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lift
1982 09 24 2.3021
Mining RecorderMinistry of Natural Resources75 Elgin StraatBox 669Sault Sta Maria, OntarioP6A SK2
Dear Madam:
We have received reports and maps for a Geophysical (Electromagnetic and Magnetometer) Survey submitted under Special Provisions (credit for Performance and Coverage) on Mining Claims SSM 633848 at al in the Township of Jacobson.
This materiel will be examined and assessed and a statement of assessment work credits will beissued.
Tours very truly
E.F. AndersonDirectorLand Management Branch
Whitney Block, Room 6450Queen's PsrkToronto, OntarioM7A 1W3Phone: 416/965-1316
J. Skuraisc
cci Mattagami Lake Exploration Limited Toronto, Ontario
cct Mattagami Lake Exploration Limited Timmins, Ontario
ccl D.B. Sutherland Toronto, Ontario
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H N
6 N
4 N
2 N
B L 00
2 S
4 S
6 S
8 S
10 S
o
1 'V
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42C08S*eie7 C945 JACOBSON 200
D
GENERAL LEGEND
\ A IRBORNE ANOMALY
CLAIM POST (NOT LOCATEL
CLAIM POST ( LOCATED)
WITNESS POST
SHORELINE
MATTAGAMI LAKE
7/MMIN.
MEATH PRO
ATION LTD
OUP 'C'
JACOBSON Twp
MAGNETOMETER SURVEY
OPERATOR: D. MELANSON
INSTRUMENT' McPHAR M-700
DATE ' MARCH 1982
DRAWN' R KRUSE
SCALE' l" s 200'
DATE' MAY 1982
J). f
-
CO? f
8 N
6 N
4 N
2 N
BL 00
^ s
4 s
6 S
8 S
10 S
O l.
/\ f . N i NX\ Mui*p*if.*
—D
LEGEND
IN PHASE - -"' 1--' OUT PHASE -. .---'""~"---
VERTICAL SCALE -- l ": 2 0 0X0
COIL SEPARATION ; 4 00'
FREQUENCY : 444 HzOP
CONDUCTOR TRACE
Q
,w P
CONDUCTIVITY JHJCKNESSDE"PTH"{ feet)
GENERAL LEGEND
- AIRBORNE A NOMALY
•- C LAIM POST (NOT LOCATED
: CLAIM POST ( LOCATED)
; WITNESS POST
SHORELINE
MATTAGAMI LAK
'/MM/,
MEATH PRO
ATION LTD
ROUP 'C'
JACOBSON TwpHORIZONTAL LOOP SURVEY
444 Hz 400' COIL SEP.SURVEY BY; D. MACLEAN
INSTRUMENT ' APEX MAX-MIN I
DATE' MARCH 1982
DRAWN' R K RUSE
SCALE' l": 200'
DATE' APRIL 1982
42C08S*ai87 B*45 JACOBSON 210
-
Q rf co*f o"
8 N
6 N
4 N
2 N
BL'OO'
2 S
4 S
6 S
8 S
10 S
r
O
633851 633850
i i . -..^—
LU
633848 633849
NOtX MAC
m les
LJO COt,
LEGEND
IN PHASE -"-"^" ~~"^-.
OUT PHASE : -----•••""•^.
VERTICAL SCALE l'^ 20 0Xo
COIL SEPARATION ^ 400'
FREQUENCY - 1 777 Hz
--t-
IP OP '
CONDUCTOR TRACE
THICKNESS (mhos) DEPTH ffeel)"
D
GENERAL LEGEND
AIRBORNE ANOMALY
CLAIM POST (NOT LOCATED
- CLAIM POST { LOCATED)
WITNESS POST
SHORELINE
MATTAGAMI LAKE
7MM/M
MEATH PRO
ATION LTD
UP 'C'
JACOBSON iwpHORIZONTAL LOOP SURVEY
1777 Hz 400'COIL SEP.SURVEY BY' D MACLEAN DRAWN' R KRUSE
INSTRUMENT APEX MAX-MINU SCALE' l" * 200'
DATE' MARCH 1982 ' DATE' APRIL 1982
42C08SW0I07 C045 JACOBSON 220