RPT ON AGEOPH SUR
Transcript of RPT ON AGEOPH SUR
S- 3 /7-2
31C1SNWM08 2.3173 PALMERSTON
REPORT ON
AIRBORNE GEOPHYSICAL SURVEY
IN THE
CROTCH LAKE AREA OF ONTARIO
FOR
AGNES AND JENNIE MINING CO.
BY
KENTING EARTH SCIENCES LIMITED, OTTAWA
PROJECT NO. 79097
010
OTTAWA, CANADA, NOVEMBER 26TH, 1979.
D.M. DARBHA, M.Se., GEOPHYSICIST.
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REPORT ONAIRBORNE GEOPHYSICAL SURVEY
IN THECROTCH LAKE AREA OF ONTARIO
FOR AGNES AND JENNIE MINING CO.
1. INTRODUCTION
This report pertains to the combined airborne radiometric and
magnetic survey carried out in the Crotch Lake area (also called Cross
Lake) of Ontario for Agnes and Jennie Mining Co. The survey was
conducted on November 6th, 1979 by Kenting Earth Sciences Limited
geophysically equipped Britten-Norman Islander aircraft (registration
C-FY2T) based at Ottawa.
A mean terrain clearance of 150 feet was maintained throughout
the survey at an average aircraft speed of 110 miles per hour. Flight
lines were spaced at 1/8 mile intervals and oriented N 20 W.
The geophysical data acquired totalled approximately 90 line
mi les.
The following Kenting personnel were associated with this
project:
N. Fjell
K. Hall
H. Davidson
G. Wes ton
Pilot
Electronic Operator
Navigator
Data Compiler
D. Fitzsimmons - Data Chief
D. M. Darbha Geophysicist
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2. INSTRUMENTATION
A multi-channel differential gamma ray spectrometer (KDSS)
manufactured by Kenting Earth Sciences Limited was employed for this
survey. A technical description of specifications of this unit is
appended to this report. A sensor array of thallium activated sodium
iodide crystals was used providing a detector volume of approximately
1,500 cubic inches. All detectors were held at constant temperature
throughout the survey to minimize drifting in the gain of the photo
multiplier tubes.
The airborne magnetometer was a model G-803 proton precession
instrument manufactured by Geometrics of California.
A Honeywell radar altimeter provided terrain clearance
measurements.
An AS-5 35mm. continuous strip camera recorded the flight
path.
As an aid to navigation, the aircraft was fitted with a Sperry
C-ll gyro stabilized compass and a Bendix doppler navigation system.
A six channel Brush 260 unit recorded four radiometric channels,
the altimeter and magnetic data in analogue form. All of the above
data were recorded digitally on magnetic tape by the KDSS.
The quantities measured, format and scales used on the six
channel analogue recording are as follows, with the chart oriented such
that fiducial numbers increase to the left:
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1p1p-
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P1'"-'t- -ttlil
17,.'.,
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Channel
Top of Chart 6
5
4
3
2
1
No. Parameter
Altimeter
Magnetometer
Thorium (Tl-208) 2.42 - 2.82 Mev
Uranium (Bi-214)1.66 - 1.86 Mev
Potassium (K-40)1.36 - 1.56 Mev
Total Count0.4 - 2.82 Mev
All quantities increase upwards. Any chan
format are indicated on the
Analnmjp rAr.orrlirms
records.
Hinital rftr.ordina andllIIlF*
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Scale
O - 1000 feet
O - 1000 gammas
O - 200 counts/sec.
O - 200 counts/sec.
O - 400 counts/sec.
O - 4000 counts/sec.
numbered fiducial marks every 10 seconds to facilitate correlation.
Digital sampling is at 1.0 second intervals.
3. PRESENTATION OF RESULTS
One plan map sheet at a scale of l Inch to i-mile covers the survey
area. An uncontrolled air photo mosaic provided the base for this map.
The magnetic and radiometric results are each presented on separate map
sheets using the same base.
The magnetic results have been manually levelled, computer
processed and machine contoured using a 25 gamma contour interval where
gradients permit.
The radiometric plan map is a combination of corrected total
count contours and significant anomaly peak values. The anomaly peaks
list the total count, potassium, uranium and thorium values beside each
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anomaly. As well, the uranium to thorium ratio Is indicated by the
degree to which the anomaly symbol is shaded in (see map legend). The
total count contour interval is 200 counts per second and the contours
are computer generated.
The radiometric results have been corrected for atmospheric
background, terrain clearance and Compton scattering.
Atmospheric background readings were determined by flying over
a large body of water at survey altitude before and after the survey flight.
The following average backgrounds (in counts/second) were recorded and used
In the computations:
Flight Total Count Potassium U ran i urn Tho ri urn
1 No Survey
2 271 28 l? 6
All count rates were normalized to an altitude of 150 feet using
the following formula:
-M. HN . N e ^ M
o
Where N is the observed count rate
N is the normalized count rate at 150 feet o
/4. is the attenuation coefficient
H is the elevation difference from 150 feet
The attenuation coefficients (/^ ) used are as listed below:
TOTAL COUNT - 2.0 x 10~ 3
POTASSIUM - 2.3 x 10" 3
URANIUM - 1.7 x 10" 3
THORIUM - 1.7 x 10" 3
The Compton scattering coefficients were determined prior to the
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survey using the special pads set up for this purpose by the Geological
Survey of Canada at the Ottawa International Airport. The following
results were obtained:
ot - 0.48
[i -0.52
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S.
k. GEOLOGY
M The geological circular no. 12 by Ontario Department of Mines,
entitled "Geological notes for Maps Nos. 2053 and 205** Madoc-Gananoque
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Area by D.F. Hewitt, 19&A" was used as a reference In this report. The
survey area lies in the north-east corner of the map 2053 (scale l" - 2
miles). The Precambrian Plutonic rocks are predominant in the area, with
Cross'Lake gneiss on the west side in contact with the granitic gneiss,in
the southern section. Marble and Lime Silicate rocks are reported in the
central portions of the area along with the meta-volcanic rocks. Map 2053
also shows two lineaments (or faults) running approximately E-W in the area.
5. DISCUSSION OF RESULTS
The main magnetic picture of the area shows low magnetic gradients,
Indicative of weakly magnetic granite gneisses predominant in the area.
On the west side of the area, the Cross Lake gneiss appears to be least magnetic
of all lithological units. N-E magnetic trend dominates the area. A
N-S trend in the central section appears to be associated with the formations l
boundary between two types of Precambrian Plutonic rocks. The most striking
magnetic feature in the northern part of the area, striking E-W, indicates
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high intensity magnetic units. This linear magnetic feature can be
interpreted to be due to intrusives. We can also observe the reported
(Map 2053) lineament (such as a fault), in NW - SE direction, intersecting
the above mentioned magnetic feature.
The total count radiometric map shows specific contour trends in
NE to N direction conforming with the magnetic and geological (reported)
trends. In the northern corner of the survey area the total count
contour trends seem to be associated with the combined structural and
lithological features.
All the high total count areas contain excellent contributions
from Uranium sources. The survey was very successful in detecting a
large number of top priority Uranium prospects within the area. Alli anomalies with high uranium count rates and/or high Uranium to Thorium
ratios should be considered significant. The strongest airborne
Uranium responses were observed in the marked Zones l, 2 and 3. Zones
4 and 5 contain good uranium signatures, probably along the intrusive
contact between Precambrian Plutonic and Metavolcanics. The highest total
counts were recorded at the anomaly 18A, with excellent Uranium content.
The high Uranium signatures ^SOcps) noted in the area appear similar to those
observed in the Bancroft Uranium district. The anomalous zones l, 2 and 3
appear to correlate well with the magnetic features such as appreciable
changes in the magnetic gradients, representative of formational contacts and
fault zones.
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6. RECOMMENDATIONS AND CONCLUSIONS
Although many good uranium anomalies were detected by the
airborne survey, these should be carefully analyzed to determine the
significance of the prospects. A detailed ground follow up is
recommended In the Zones l - 5 to assess and delineate the Uranium
mineralisation. In areas of special interest, the magnetic data used in
conjunction with the detailed geological knowledge should provide
Information on the important lithological and structural associations
of Uranium mineralisation.
Respectfully submitted,
OTTAWA, Canada, D.M. Darbha, M.Se., November 26, 1979- Geophysicist.
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430533 — ——— -l-i 430530521237 '—.- - -
521229 , 5 21234
COUNTY OF FRONTENAC
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527175 '527180 . l- J EO EO 1*13649
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COUNTY OF FRONTENAC
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5272
Y l f -INCHs4OCHAINS
ntario
Ministry t
GEOPHYSICAL - G TECHNICAI
File.
PALMERSTON•—"—~^— 3ici5Kiweeea TO BE ATTACHED AS A!
FACTS SHOWN HERE NEED NOT BE REPEATED IN REPORT TECHNICAL REPORT MUST CONTAIN INTERPRETATION, CONCLUSIONS ETC.
900
Type of Survey (s) ftirbOrng. fZnrl \
Township or Area .4A ero
Claim Holder(s) C l \ *\ .-y^ k P koftddeit
Survey Company K
Author of Report Address nf Author 3 &O
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Covering Dates of Survey
Total Miles of Line Cut
863 .(linecutting to office)
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______
DAYS per claim
Geological.Geochemical.
AIRBORNE CREDITS (Special provision credits do not apply to airborne lurveyi)
Magnetometer
/* f
Electromagnetic Radiometric(enter days per claim)
SIGNATURE
Res. Geol.. .QualificationsPrevious Surveys
File No. Type Date Claim Holder
MINING CLAIMS TRAVERSED List numerically
,,(prefix) (number)
go I
fi!
TOTAL ri. A IMS 21 -r 31 c ^Z
837 (5/79)
GEOPHYSICAL TECHNICAL DATA
GROUND SURVEYS — If more than one survey, specify data for each type of survey
Number of Stations. Station interval -—— Profile scale ————
.Number of Readings
.Line spacing —.—.—
Contour interval.
uhttzC
Instrument.Accuracy — Scale constant. Diurnal correction method.Base Station check-in interval (hours). Base Station location and value ___
ELECTROMAGNETIC P.nil rrmfifniratinn
Toil separation
Amirary
Method: Q Fixed transmitter D Shoot back CU In lineFreniienry
(specify V.L.F. station)
D Parallel line
Parameters measured.
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Instrument.Scale constantCorrections made.
Base station value and location.
Elevation accuracy.
Instrument ^—^————— Method CD Time Domain Parameters — On time ———
- Off time -——— Delay time —-——
— Integration time.
Frequency Domain Frequency _____Range .^_^__^__
Power.Electrode array — Electrode spacing . Type of electrode
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f SELF POTENTIALInstrument^^——————————^——-———-———-———————————— Range.Survey Method .—--—————--———.—^^————————-————-—————-————
Corrections made.
RADIOMETRICInstrument——Values measured.
Energy windows (levels)———-——-—^—^—-—————————————.^.—.——^^—Height of instrument______________________________Background Count. Size of detector-———^———————^-^-—————-——^—^,—...———--——...—Overburden —^———^-———————-—^^^-————————-—.—.———.....—
(type, depth — include outcrop map)
OTHERS (SEISMIC, DRILL WELL LOGGING ETC.) Type of survey^————————.—.—--———————.Instrument ———————————^-——————..——Accuracy__________________________Parameters measured.
Additional information (for understanding results).
AIRBORNE SURVEYS Type of survey(s)-.. nInstrument(s) V1/K) J **-*** ay Q*cWvcr
u (specify for each type of survey)Amirary Pflfr-tor KCScMJCVS i < V'S Ve S yftW. -' > \?^io_____________O'/ ?*
(specify for each type of survey) "lAircraft n^H fefVH*X-f\)ori^vs^ J ctcv/ic/ry ( fe^^ati^ -ft- C-JP/^T/Sensor alHtnHp /^Q - ZOO
Navigation and flight path recovery method. S "
Aircraft altitude___(SO - 2OO '________________Line Spacing_____/P A^il^ Miles flown over total area____"O_________________Over claims only " ^ ^ /)QJ
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———,—————
Drainage Development——————————— Estimated Range of Overburden Thickness.
ANALYTICAL METHODSValues expressed in: per cent
p. p. m. p. p. b.
D O d
Cu, Pb, Zn, Ni, Co, Ag, Mo, As,-{circle)
Others—-—-—.————---—-..—.-—--—-.—-—Field Analysis (.
Extraction Method. Analytical Method- Reagents Used——
Field Laboratory AnalysisNo. ——————^——
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.
Clarendon
32
Clarendon Twp. (M.77)
IV V..-' VI
31
30
28
26
25
24
23
22
Palmerston Twp.(M.I39)
NALJfl SLiBM COBl E 9/9 PILF "2^76 l
-f 55.75ac
5575oc
5/ George
- vy l 102.5oc.
102.Sac, l
Hinchinbrooke Twp.(M.104)
THE TOWNSHIPOF
OLDENCOUNTY OF FRONTENAC
EASTERN ONTARIO MINING DIVISION
SCALD I-INC^4QCHA]NSLEGEND
PATENTED LAND
CROWN LAND SALE LEASELOCATED LAND LICENSE OF OCCUPATION
MINING RIGHTS ONLY
SURFACE RIGHTS ONLY
ROADS
IMPROVED ROADSKINGS HIGHWAYSRAILWAYS
POWER LINESMARSH OR MUSKEG
MINESCANCELLEDTRAILSPATENTED for S.RO
NOTES This Map Is Not To Be UsedFOR SURVEY PURPOSES
Let And Concession Lines Shown Hereon Are
Projected From The Best Information Available,
But Their True Position Is Not Guaranteed.
For Official Survey Purposes Consult The
Original Survey Plans And Field Notes Of Records In the Ministry of Natural Resources
400 surface rights reservation along the shores of all lakes and rivers
The Acreages Shown Are The Amounts
That Were Patented And Do Not Necessarily Represent The True Surveyed Area Of The Parcel.
RKSERVES
Crown Reserve File .36526
withdrawn from staking " 7(2^6
Area* wit^Hnwn from staking under Section -3 of l he Mining Act. * - .j' t - . r *?, * s r. K* t*.
,-IHI- .) File n.-* 0 P'*pos'tion
OF
OEC201979
SURVEYS AND MAPPING!
Bedford Twp.( M.52)
PLAN NO.-M.I36ONTARIO
31Ct5NWB0*8 2 .3172 PALMERSTON
MINISTRY OF NATURAL RESOURCESSURVEYS AND MAPPING BRANCH
South Canonto Twp. (M.68)
CROSS
9^ -^^~~^*^~* ^frferr^^ ,\. i
s.'R O Rapids 460126
Millers \ L oke460123
460260 46026 l 460278 \ f
460291 l 46D29S
LAKE
r " T * H
430538 4 ' 3 F 5 -l L" j /4136
81, 5271 l 8
l Jtl 5 27I22W 527119 5 2 7 '^ t.
^-0~ . E0~ EO 1EO
V V 521228 X 1 521235V
\ Dlden Twp.lM. 1 36) Oso Twp (M. 138)
Q.
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O.CC/)
THE TOWNSHIP OF
PALMERSTON
COUNTY OF FRONTENAC
E ASTERN ONTARIO MINING DIVISION
SCALE' 1-INCH * 40 CHAINS
LEGEND
PATENTED LAND
CROWN LAND SALELEASES
LOCATED LAND
LICENSE OF OCCUPATION
MINING RIGHTS ONLY
SURFACE RIGHTS ONLYROADS
IMPROVED ROADS
KING'S HIGHWAYS
RAILWAYS
POWER LINESMARSH OR MUSKEGMINESCANCELLEDPATENTED S.R.O.
C. S. O
Loc.
L.O.
M.R.O.
S, R.O
c.e
NOTES
ThisMap Is Not To Be Used FOR SURVEY PURPOSES.
Lot And Concession Lines Shown Hereon Are Projected From The Best Information Available. Bul Their True Position Is Not Guaranteed. For Official Survey Purposes Consult The Original Survey Plans And ri5ld Notes Of Records In the Ministry of Natural Resources
400 surface rights reservation a lor g the shores of a.! lakes and rivers
"[he A^rsages Shown Are The Amounr That Were Patented And Do Not Necessarily Represent The True Surveyed Area Of The Parcel
Flooding Rights to 1105 elevation of
Cross Lake. File I26il3
RESERVES
(5) S R.O. Reserved for public use .Fiie5i9ia
(S) M N R Reserve
(S) SRO Reserved sect39(d)of Mining Act (R.S.o'60)
060201979
SURVEYS AND MAPPING
PLAN NO-M. |39
31C15N*W68 2.3172 PALMERSTON S10
ONTARKJ
MINISTRY OF NATURAL RESOURCESSURVEYS AND MAPPING BRANCH
(APPROX.)
HORIZONTAL CONTROL . . . . . . . . .BASED ON
PHOTO LAYDOWN
LEGEND
25 GAMMA CONTOUR
100 GAMMA CONTOUR.
500 GAMMA CONTOUR .
MAGNETIC LOW . . . .
CONTOUR INTERVAL . . . .
MEAN TERRAIN CLEARANCE
TRAVERSE INTERVAL . . . . .
. . . 25 GAMMA
150-200 FEET
. . .660 FEET
AIRBORNE M AGNETOMETER S URVEY
CROTCH LAKE AREAONTARIO
AGNES and JENNIE MINING CO.
SCALE l " : 1320'
KENTING EARTH SCIENCES L l WITED , OT T AWA
31C15NW000B 2.3172 PALMERSTON 221
K E.S.L. 79097
(APPROX.)
HORIZONTAL CONTROL . . . . . . . . .BASED ON
PHOTO LAYDOWN
LEGEND
VALUES CORRECTED FOR
ATMOSPHERIC BACKGROUND
ALTITUDE NORMALIZED TO 150 FEET
TERRAIN CLEARANCE
CCMPTON E FFECT
TC K U
Th
U Th
> 15
RATIO
MEAN TERRAIN CLEARANCE. . . .150-200 FEET
TRAVERSE INTERVAL . . . . . . . . . . .660 FEET
( TOTAL COUNT CONTOUR )
AIRBORNE RADIOMETRIC SURVEY
CROTCH LAKE AREAONTARIO
AGNES and JENNIE MINING CO.
SCALE l " ^ 1320'
KENTING EARTH SCIENCES LIMITED , OTTAWA , ^
31CI5NK0808 2 .3172 PALMERSTON
K.E.S.L. 79097