helicopter electromagnetic system
TRANSCRIPT
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od/z f , C
HEMLO PROJECT
SUNEXCO ENERGY CORP
ELECTROMAGNETIC PROFILE MAP COAXIAL
SCALE 1/15,000 O K i lorn* t r*
1/2 1/2 Mil*
AERODAT LIMITED
DATE' March-June 1983
N.T.S. No'
48-45'
Marathon
86*00'
42C13SE0055 42C13SE00I2 WHITE LAKE (NORTH) 200
HELICOPTER E LECTROMAGNETIC SYSTEM
Coil Configuration -CoaxialSeparation ^7 metresFrequency - 45OO Hz.
Mean Sensor Altitude -30 metresHorizontal Positioning- MRS m radar positioning l
p.p.m. 30 i
20 -.
10 i
O
-N-In-phase
Quadrature
42 4te if
HEMLO PROJECT
SUNEXCO ENERGY CORR
ELECTROMAGNETIC PROFILE MAP COPLANAR
SCALE 1/15,000 O l Kilometre
1/2 1/2 Mil*
AERODAT LIMITED
DATE: March-June 1983
N, T. S. No '
'AP No'
86*00'
48-45'
HELICOPTER ELECTR6MAGNETIC SYSTEM
Coil Configuration -CoplflnorSeparation - 7 metresFrequency -4100 Hz.
Mean Sensor Altitude -30 metresHorizontal Positioning-MRS IE radar positioning
p.p.m. 120 q
80 :
40 \
O
-N-
In-phase
Quadrature
*2C13SEa055 4 2CI3SE0812 WHITE LAKE (NORTH)
\
HEMLO PROJECT
SUNEXCO ENERGY CORR
VLF-EM TOTAL FIELD
SCALE 1/15,000 Q Kilometre
1/2 1/2 Mile
AERODAT LIMITED
DATE' March-June 1983
N.T.S. No-'
1AP No-- 3
46*45'
86'00'
VLF-EM
Instrument 1 Herz Totem 2AStation; NAA Cutler, Maine-17.8 kHz.
Mean Sensor Altitude' 45 metresHorizontal Positioning- MRS UT radar positioning
-HJ-contour interval 2*Vo
NOTE : The total field will usually indicate a local maximum over the upper edge of a steeply dipping conductor.
42C13SEe655 42C53SE0812 WHITE LAKE (NORTH)
\
HEMLO PROJECT
SUNEXCO ENERGY CORP
TOTAL MAGNETIC FIELD
SCALE 1/15,000 1 P 1 K i lorn* t r*
1/2 0 1/2 Mil*
^ DATE; March-June
VAEROOAT LIMITED N TS No1AP No: 4
mn minium li muni minium ii m ———————————————————
1983
86-00'MAGNETOMETERInstrument -- Geometrics 6-803Mean Sensor Altitude : 45 metresHorizontal Positioning-- MRS HI radar positioning
250 gammas.
5O gammas.
10 gammas. contour interval 10 gammas
fN
42C13SE0055 4aC13SE0*12 WHITE LAKE ( NORTH) 230
HEMLO PROJECT
SUNEXCO ENERGY CORP
INTERPRETATION
SCALE 1/15,000 O Kilometre
1/2 1/2 Mile
AERODAT LIMITED
March-June 1983
IM. T. S. No :
^P No- 5
SUPERIOR
B6 0OO' INTERPRETATION
Interpreted conductive axis within bedrockPossible conductive axis within bedrock
- . Probable cultural conductor
AERODAT HEM SYSTEM RESPONSE VERTICAL HALF-PLANE
-N-
Frequency (Hf) 1 - Cooduclonce (Siemens)
100IN- PHASE (ppm]
42C13SE0055 42C13SEOai2 WHITE LAKE t NORTH) 240 r*
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LAKE (NORTH) 010
REPORT ON
COMBINED HELICOPTER-BORNE
MAGNETIC AND ELECTROMAGNETIC
SURVEY
HEMLO, ONTARIO
RECEIVED•ji-'l o 1933
MINING LANDS SECTION
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B SUNEXCO ENERGY CORPORATION
by
AERODAT LIMITED
September, 1983
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0 Q TABLE OF CONTENTS Q ———————————————————
••••••••••B
uHuMuMHHi
———— 5 1. INTRODUCTION^— — — t~——————— Of
* 2 . SURVEY AREA AND LOCATION"•""••1 Lil————. v
-' 3. AIRCRAFT EQUIPMENT AND PERSONNELz^HvZZiBM i~-
* 3.1 Aircraft•••••H ™ ~—————— 8
5 3.2 Equipment^^^^n n
2 3.2.1 Electromagnetic System*"^^"^!? LO
——— 1 3.2.2 VLF-EM System^^M-~~ 10""•^"M n
k] 3.2.3 Magnetometer
3.2.4 Magnetic Base Station
3.2.5 Radar Altimeter
3.2.6 Tracking Camera
3.2.7 7inalog Recorder
3.2.8 Digital Recorder
3.2.9 Radar Positioning System
4. DATA PRESENTATION
4.1 S'.ase Map and Flight Path Recovery
4.2 Electromagnetic Profile Maps
4.3 Magnetic Contour Maps
4.4 VLF-EM Contour Maps
5. INTERPRETATION
6. RECOMMENDATIONS
7. DISCUSSION OF RESULTS
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APPENDIX I - General Interpretive Considerations
LIST OF MAPS
l(Scale: 1:15,000)
lMaps
l ~l Airborne Electromagnetic Survey Profiles
m 4 500 Hz (coaxial)
2 Airborne Electromagnetic Survey ProfilesI 4100 Hz (coplanar)
II 3 Total Field VLF-EM
m A Total Field Magnetic Map
5 Interpretation Map
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m 1 . INTRODUCTION
lH During the period of March 2 to June 14 , 1983
Aerodat carried out an airborne geophysical survey
l of approximately 1,570 square kilometers in the Hemlo
area of Ontario. Equipment operated include a 3
l frequency HEM and VLF electromagnetic systems, a
B magnetometer and a radar positioning device. At a
nominal line spacing of 100 meters a total of
l 15,770 line kilometers of data was acquired.
M This report, on behalf of Sunexco Energy Corporation
refers to a part of the overall survey, consisting of
K 44 line; kilometers, flown during the period of April 15
to April 30, 1983.
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2.
2-1
SURVEY AREA AND LOCATIONS
The index map below outlines the overall survey and
the location of the property to which this report
refers. The property outline and related mining
claim numbers are indicated on the maps accompanying
the report.
66'OO'
*8"*5!*fK—-*
LMKf
SUFffTIOf!
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.•*, ...-.j. - ...SP. ....
3 -
ll al 3' AIRCRAFT EQUIPMENT
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3.1 Aircraft
The helicopter used for the survey was an Aerospatial
Astar 350D owned and operated by North Star Helicopters,
Installation of the geophysical and ancillary equipment
l was carried out by Aerodat. The survey aircraft was
flown at a nominal altitude at 60 meters.
3.2 Equipment
3.2.1 Electromagnetic System
* The electromagnetic system was an Aerodat/
l Geonics 3 frequency system. Two vertical
coaxial coil pairs were operated at 950 and
l 4500 Hz and a horizontal coplanar coil pair
at 4100 Hz. The transmitter-receiver separa-
* tion was 7 meters. In-phase and quadrature
M s ignals were measured simultaneously for the
3 frequencies with a time-constant, of 0.1
l seconds. The electromagnetic bird was towed
30 meters below the helicopter.
3 - 2 - 2 VLF-EM SystemaThe VLF-EM System was a Herz 1A. This instru-
I ment measures the. total field and vertical
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quadrature component of the selected frequency.
The sensor was towed in a bird 15 meters belowH
the helicopter. The station used was NAA,
l Cutler Maine, 17.8 KHz or NLK, Jim Creek
Washington, 24.8 KHz.
l3.2.3 Ma gne tome te r
l The magnetometer was a Geometrics G-803 proton
8 precession type. The sensitivity of the
instrument was l gamma at a 0.5 second sample
l rate. The sensor was towed in a bird 15 meters
— below the helicopter.
B3.2.4 Magnetic Base Stationl ————————
An IFG proton precession type "lagnetometer was
l operated at the base of operations to record
— diurnal variations of the earths magnetic
' field. The clock of the base station was
l synchronized with that of the airborne system.
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3-3
3.2.5 Radar Altimeter
A Hoffman HRA-100 radar altimeter was used to
record terrain clearance. The output from the
instrument is a linear function of altitude
for maximum accuracy.l3.2.6 Tracking Camera
A Geocam tracking camera was used to record
fi flight path on 35 mm film. The camera was
m operated in strip mode and the fiducial numbers
for cross reference to the analog and digital
l data were imprinted on the margin of the film.
B 3.2.7 Analog Recorder
M A RMS dot-matrix recorder was used to display
the data during the survey. A sample record
fi with channel identification and scales is
presented on the following page.
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ANALOG CHART
c AMP: RAFIDUCIAL ;*" .
VLF QUAD.
VLF TOTAL
1 VLF QUAD.*" ——— -™-, ____ ^
1 VLF TOTAL
|COPIJVNAR
1
1 COPLANAR . __ - —————— -^S—— , —— v-^——— ~—— ——— —— - ———
(ORTHO)^^,
1(LINE) ,.
QUA B., jt" ~~ .4
IIjj-PHASE ,,
25i
TVV,--'
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7,CX
*\MANUAL FIDUCIAL
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3.2.8 Digital Recorder
A Perle DAC/NAV data system recorded the survey
data on cassette magnetic tape. Information
recorded was as follows:
Equipment
EM
VLF-EM
magnetometer
altimeter
fiducial (time)
fiducial (manual)
Interval
0.1 second
0.5 second
0.5 second
l.O second
1.0 second
0.2 second
13-5
3.2.9 Radar Positioning System
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lA Motorola Mini-Ranger (MRS III) radar
navigation system was utilized for both
•j navigation and track recovery. Transponders
located at fixed known locations were inter-
Jj rogated several times per second and the ranges
from these points to the helicopter measured
™ to several meter accuracy. A navigational
Ij computer triangulates the position of the
helicopter and provides the pilot with naviga-
|| tion information. The range/range data was
recorded on magnetic tape for subsequent flightB" path determination.
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4-1
4. DATA PRESENTATION
4.1 Base Map and Flight Path Recovery
—
* maps
The base map, at a scale of 1/15,000 is an
enlargement of published 1/50,000 topographic
The flight path was derived from the Mini Ranger
radar positioning system. The distance from the
helicopter to two established reference locations
l was measured several times per second and the
position of the helicopter mathematically calcu-
I lated by triangulation. It is estimated that the
m flight path is generally accurate to about 30
meters, with respect to the topographic detail of
l the base map.
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l 4.2 Electromagnetic Profile Maps
l The electromagnetic data was recorded digitally at
a high sample rate of 10/second with a small time
" constant of 0.1 second. A two stage digital filtering
l process was ccirried out to reject major sferic events,
and reduce system noise.
Local atmospheric activity can produce sharp, large
H amplitude events that cannot be removed by conventional
filtering procedures. Smoothing or stacking will reduce
m their amplitude but leave a broader residual response
m that can be confused with a geological phenomenon. To
avoid this possibility, a computer algorithm searches
l out and rejects the major "sferic" events.
l The signal to noise was further enhanced by the
application of a low pass filter. The filter was
l applied digitally. It has zero phase shift which
M prevents any lag or peak displacement from occurring
and it suppresses only variation with a wavelength
l less than about 0.25 seconds. This low effective time
constant permits maximum profile shape resolution.
lFollowing the filtering processes, a base level
H correction was made. The correction applied is a linear
function of time that ensures that the corrected
™ amplitude of the various inphase and quadrature components
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4-3
is zero when no conductive or permeable source is
present. This filtered and levelled data was then—
am presented in profile map form.
The in-phase and quadrature responses of the coaxial
B 4500 Hz and the coplanar 4100 Hz configuration are
presented with flight path on the topographic base
map .lB 4.3 Magnetic Contour Maps
m The aeromagnetic data was corrected for diurnal
variations by subtraction of the digitally recorded
l base station magnetic profile. No correction for
regional variation is applied.
lThe corrected profile data was interpolated onto a
l regular grid at a 2.5 mm interval using a cubic
spline technique. The grid provided the basis for
™ threading the presented contours at a 10 gamma
M interval.
m 4 * 5 VLF-EM Contour Maps
The VLF-EM signal, was compiled in map form. The
B mean response level of the total field signal was
removed and the data was gridded and contoured at
an interval of 2?,.
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5. INTERPRETATION
B The electromagnetic profile maps and VLF contour
map were analysed and conductor axes interpreted.
The axes identified are divided into 2 classific
ations; "probable bedrock conductors" and "possible
bedrock conductors".
In the first category are those conductors that
l display relatively clear characteristics of a thin,
steeply dipping conductive source. A discussion
( of the HEM response shape is provided in the
H Appendix. Anomalies with less distinctive charac
teristics were also included in this category if
associated with a magnetic feature.
H The second category, "possible bedrock conductor"
were not adequately distinguished by HEM response
l shape or magnetic association to rule out a
conductive overburden source.
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6. RECOMMENDATIONS
l The "Hemlo" gold deposit is a very weak electro
magnetic conductor. Cultural interference along
B the road prevented reliable evaluation of electro-
m magnetic data over the main zone; however, weak
HEM and VLF-EM responses are noted along strike.
l The magnetic t-'ntour map clearly showed an assoc
iated linear magnetic anomaly of about 150 gammas
l amplitude.
l Gold mineralization, disseminated in the rock
cannot be expected to produce a measureable elect-
™ romagnetic anomaly. The associated geologic
B formation may become measureably conductive due to
accessory sulphide or graphite mineralization or
l even electrolytic conduction within faults and
shears.
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B Interpreted bedrock conductor axes indicate zones
potentially favourable to gold mineralization and
™ deserve ground follow-up investigation. Those
fl most familiar with the detailed geology of the area
can best evaluate the potential significance of the
jl conductors and magnetic features and assign relative
follow up priority.
lRespectfully submitted,
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" August. 24. 1983 R. L. Scott Flog
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7. DISCUSSION OF RESULTS
expression.
l The conductor locations are numbered for ident
ification cind discussion, cind do not imply priority.
(1) Moderate conductor, nuignetic low, vest of
l diabase dyke.
l (2) High amplitude, moderate conductor, no magnetic
l(3) Poor conductor, west of diabase dyke, on trend
l with (2).
l (4) Weak conductor, possibly surficial effect.
M ( 5) Modereite conductor, some magnetic response.
m ( 6) Weak conductor, on flank of magnetic trend.
— (7) Fair to good conductor, on trend with (2) and
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(8) Weak conductor, north contact of serpentinite.
g (9) Weak conductor, centre of serpentine body,
l (10) Fair, short conductor, south contact of serpen
tine .
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(11) Good conductor, contains associated magnetic
minerals.
(12) Weak conductor, on geological trend with (10)
Fenton Scott, P.Eng.
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APPENDIX
GENERAL INTERPRETIVE CONSIDERATIONSlE le c t r om a g n et i c
l The Aerodat 3 frequency system utilizes 2 different
g transmitter-receiver coil geometries. The traditional
coaxial coil configuration is operated at 2 widely
l separated frequencies and the horizontal coplanar coil
pair is operated at a frequency approximately aligned
l with one of the coaxial frequencies.
l The electromagnetic response measured by the helicopter
system is a function of the "electrical" and "geometrical"
B properties of the conductor. The "electrical" property
M o f a conductor is determined largely by its conductivity
and its size and shape; the "geometrical" property of the
l response is largely a function of the conductors shape and
orientation with respect to the measuring transmitter and
recever .
Electrical Considerations
l For a given conductive body the measure of its conductivity
or conductance is closely related to the measured phase
l shift between the received and transmitted electromagnetic
m f ield. A small phase shift indicates a relatively high
conductance, a large phase shift lower conductance. A
l small phase shift results in a large in-phase to quadrature
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- 2 - APPENDIX I
ratio and a large phase shift a low ratio. This relation
ship is shown quantitatively for a vertical half-plane
model on the phasor dicigram. Other physical models will
show the same trend but different quantitative relation
ships.
The conductance and depth values as determined are correct
only as far as the model approximates the real geological
situation. The actual geological source may be of limited
length, have significant dip, its conductivity and thickness
may vary with depth and/or strike and adjacent bodies and
overburden may have modified the response. In general the
conductance estimate is less affected by these limitations
than the depth estimate but both should be considered a
relative rather than absolute guide to the anomalies
properties.
AERCCAT HEM SYSTEM RESPONSE VERTICAL HALF-PLANE
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- 3 - APPENDIX
Conductance in mhos is the reciprocal of resistance in
ohms and in the case of narrow slab-like bodies is themm
product of electrical conductivity and thickness.
Most, overburden will have an indicated conductance of less
than 2 mhos; however, more conductive clays may have an
apparent conductance of say 2 to 4 mhos. Also in the low
l conductance range will be electrolytic conductors in
faults and shears.
The higher ranges of conductance, greater than 4 mhos,
indicate that a significant fraction of the electrical
n conduction is electronic rather than electrolytic in
nature. Materials that conduct electronically are limited
l to certain metallic sulphides and to graphite. High
conductance anomalies, roughly 10 mhos or greater, are
l generally limited to sulphide or graphite bearing rocks.
B Sulphide minerals with the exception of sphalerite, cinnabar
and stibnite are good conductors; however, they may occur
™ in a disseminated manner that inhibits electrical conduction
•j through the rock mass. In this case the apparent conductance
can seriously underrate the quality of the conductor in
l geological terms. In a similar sense the relatively non
conducting sulphide minerals noted above may be present in
™ significant concentration in association with minor conductive
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l sulphides, and the electromagnetic response only relate
m to the minor associated mineralization. Indicated conductance
is also of little direct significance for the identification
B of gold mineralization. Although gold is highly conductive
it would not be expected to exist in sufficient quantity
l to create a recognizable anomaly, but minor accessory sulphide
m mineralization could provide a useful indirect indication.
H In summary, the estimated conductance of a conductor can
™ provide a relatively positive identification of significant
•j sulphide or graphite mineralization; however, a moderate
to low conductance value does not rule out the possibility
J of significant economic mineralization.
Geometrical Considerations
•j Geometrical information about, the geologic conductor can
often be interpreted from the profile shape of the anomaly,
f The change in shape is primarily related to the change in
m inductive coupling among the transmitter, the target, and
* the receiver.
m In the case of a thin, steeply dipping, sheet-like conductor,
m the coaxial coil pair will yield a near symmetric peak over
the conductor. On the other hand the coplanar coil pair will
l pass through a null couple re:lationship and yield a minimum
over the conductor, flanked by positive side lobes. As the
dip of the conductor decreases from vertical, the coaxial
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l anomaly shape changes only slightly, but in the case of
the coplanar coil pair the side lobe on the down dip side
l strengthens relative to that on the up dip side.
l As the thickness of the conductor increases, induced
current flow across the thickness of the conductor becomes
™ relatively significant and complete null coupling with the
H coplanar coils is no longer possible. As a result, the
apparent minimum of the coplanar response over the conductor
l diminishes with increasing thickness, and in the limiting
case of a fully 3 dimensional body or a horizontal layer
™ or half -space, the minimum disappears completely.
l A horizontal conducting layer such as overburden will produce
. a response in the coaxial and coplanar coils that is a
function of altitude (and conductivity if not uniform) . The
B profile shape will be similar in both coil configurations
with an amplitude ratio (copl anar/coaxial) of cibout 4/1.*
lIn the case of a spherical conductor, the induced currents
l are confined to the volume of the sphere, but not relatively
restricted to any arbitrary plane as in the case of a sheet-
9 like form. The response of the coplanar coil pair directly
m over the sphere may be up to 8* times greater than that of
the coaxial coil pair.
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Jj In summary a steeply dipping, sheet-like conductor will
— display a decrease in the coplanar response coincident
* with the peak of the coaxial response. The relative
fl strength of this coplanar null is related inversely to
the thickness of the conductor; a pronounced null indicates
l a relatively thin conductor. The dip of such a conductor
— can be inferred from the relative amplitudes of the side-lobes.
Massive conductors that could be approximated by a conducting
" sphere will display a simple single peak profile form on both
B coaxial and coplanar coils, with a ratio between the coplanar
to coaxial response amplitudes as high as 8.*
Overburden anomalies often produce broad poorly defined
l anomaly profiles. In most cases the response of the coplanar
coils closely follows that of the coaxial coils with a
l relative amplitude ratio of 4.*
B Occasionally if the edge of an overburden zone is sharply
defined with some significant depth extent, an edge effect
* will occur in the coaxial coils. In the case of a horizontal
D conductive ring or ribbon, the coaxial response will consist
of two peaks, one over each edge; whereas the coplanar coil
g will yield a single peak.
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l ll * It should be noted at this point that Aerodat's definition
of the measured ppm unit is related to the primary field
l sensed in the receiving coil without normalization to the
. maximum coupled (coaxial configuration). If such normal-
ization were applied to the Aerodat units, the amplitude
l of the coplcinar coil pair would be halved.
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- 8 - APPENDIX
The Total Field Magnetic Map shows contours of thel
total magnetic field, uncorrected for regional varia-
I tion. Whether an EM anomaly with a magnetic correla
tion is more likely to be caused by a sulphide deposit
than one without depends on the type of mineralization.
An apparent coincidence between an EM and a magnetic
anomaly may be caused by a conductor which is also
l magnetic, or by a conductor which lies in close proximity
to a magnetic body. The majority of conductors which are
also magnetic are sulphides containing pyrrhotite and/or
n magnetite. Conductive and magnetic bodies in close
association can be, and often are, graphite and magnetite.
l It is often very difficult to distinguish between these
cases. If the conductor is also magnetic, it will usually
l produce an EM anomaly whose general pattern resembles
m that of the magnetics. Depending on the magnetic perme
ability of the conducting body, the amplitude of the
l inphase EM anomaly will be weakened, and if the conduc
tivity is also weak, the inphase EM anomaly may even be
l reversed in sign.
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l VLF Electromagnetics
l The VLF-EM method employs the radiation from powerful
military radio transmitters as the primary signals.
l The magnetic field associated with the primary field
M is elliptically polarized in the vicinity of electrical
conductors. The Herz Totem uses three orthogonal coils
C to measure the total field and vertical quadrature
component of the polarization ellipse.
lM The relatively high frequency of VLF 15-25 kHz provides
high response factors for bodies of low conductance.
l Relatively "disconnected" sulphide ores have been found
to produce measurable VLF signals. For the same reason,
y poor conductors such as sheared contacts, breccia zones,
I narrow faults, alteration zones and porous flow tops normally
produce VLF anomalies. The method can therefore be used
l effectively for geological mapping. The only relative dis
advantage of the method lies in its sensitivity to conductive
l overburden. In conductive ground the depth of exploration
M is severely limited.
The effect of strike direction is important in the sense
H of the relation of the conductor axis relative to the
H energizing electromagnetic field. A conductor aligned
along a radius drawn from a transmitting station will be
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l in a maximum coupled orientation and thereby produce a
stronger response than a similar conductor at a different
H strike angle. Theoretically it would be possible for a
l conductor, oriented tangentially to the transmitter to
produce no signal. The most obvious effect of the strike
l angle consideration is that conductors favourably oriented
with respect to the transmitter location and also near
" perpendicular to the flight direction are most clearly
B rendered and usually dominate the map presentation.
H The total field response is an indicator of the existence
ond position of a conductivity anomaly. The response will
l be a maximum over the conductor, without any special filtering,
and strongly favour the upper edge of the conductor even in
H the case of a relatively shallow dip.
l The vertical quadrature component over steeply dipping sheet
like conductor will be a cross-over type response with the
cross-over closely associated with the upper edge of the
conductor.
The response is a cross-over type due to the fact that it
is the vertical rather than total field quadrature component
l that is measured. The response shape is due largely to
geometrical rather than conductivity considerations and
l the distance between the maximum and minimum on either side
m of the cross-over is related to target depth. For a given
target geometry, the larger this distance the greater the
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l- 11 - APPENDIX I
I depth.
B The amplitude of the quadrature: response, as opposed
to shape, is a function of target conductance and depth
g as well as the conductivity of the overburden and host
g rock. As the primary field travels down to the conductor
through conductive material, it is both attenuated and
l phase shifted in a negative sense. The secondary field
produced by this altered field at the target also has an
l associated phase shift. This phase shift is positive and
H is larger for relatively poor conductors. This secondary
field is attenuated and phase shifted in a negative sense
B during return travel to the surface. The net effect of
these 3 phase shifts determine the phase of the secondary
l field sensed at the receiver.
l A relatively poor conductor in resistive ground will yield
a net positive phase shift. A relatively good conductor
" in more conductive ground will yield a net negative phase
fl shift. A combination is possible whereby the net phase shift
is; zero and the response is purely in-phase with no quad-
1 rature component.
l A net positive phase shift combined with the geometrical
cross-over shape will lead to a positive quadrature response
l on the side of approach and a negative on the side of
m departure. A net negative phase shift would produce the
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— change in instrument orientation as occurs on reciprocal
™ line headings. During digital processing of the quad-
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by normalizing the sign to one of the flight line headings,
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Ontario
Ministry of Natural Resources
GEOPHYSICAL - 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.
w u*—iu, u. O
Type of Survcy(s)___ALrJjor.ne Klcc.troma^netic , Fa^nctie, VLF-KK Township or Area^.^JVjn.to. .Lake, .(north part)______Claim Holder(s). . .. .. ,,-j u n c x c o K n c fly Corporation—
Survey Co.-npany- ....,..
Author of Report .. . ... ...Ke.ij ton ...Sco.t ,t.,— . -—-———-———
Address of Author ...,,...l,Z..b.albar, Place . Don Ml 11s
Covering Dates of Survey,. j'LarcJl ^ to Jubc l/i , 19.6(linrcutting to office)
Total Miles of Line Cut...... ....-......-..^.-.18.*^-. __ -.——-—
SPECIAL PROVISIONSCREDITS REQUESTED
KNTKR 40 days (includes line cutting) for first survey.
KNTKR 20 days for each additional survey using same grid.
Geophysical
-Electromagnetic
-Magnetometer
- Radiometric
- Other..
Geological.
Georhrmiral
DAYS per claim
PF^i * i* i
—— rt
MINING
CI TV
LA?AIRBORNE CRE1)1TS (Special proviiion crcditi do not apply to airborne iiirveyi)
VI. F
Magnetometer __ .Electromagnetic ^^2-~—— Radiometric(enter days per claim)
or of Report or Agent
Res. Gcol..
Previous SurveysFile No. 'I 'ype
... Qualifications . ..
Date Claim Holder
MINING CLAIMS TRAVERSED List numerically
1 e t al(prefix) (number)
A7TD'
S S ECTiOl;
TOTAL CLA1MS-
Mining Claims Traversed (List in numerical sequence)Mining Culm
Prefix Number
660671
— -74- 660679—
...——8266068^__ 88
^ ^B9-......--90.......91
92
-Y .94"-95-
.96.
.9.7
1SL
ixptnd. Days Cr.
Total numbtr of mining claim* covsf*d by thit rapOM of work.
SKI,I ..POTKNTjA.l.
Instrument^ .——.————.___-.._-._.____......-_________._________ Range.
Survey Method__.................__....—.___________________________
Corrections m ade.
RAMIOMKTRIC
Instrument............
Values measured -
Energy w indows ( levels)-.. ....^.....................,..,.__ __ ——————.^——^—^——^.^.^..
Height of i nstrument........ .... . ...........________________Background Count.
Size of detector... . ... ..........- .. ^_.______.—^.^-^^—^__.__^__________
Overburden.-- .. , _......^....___._____________________________(type, depth - include outcrop map)
01 I1KKS (SKISM1C, DRil.!. WKl.l. IXKKHNC; i.JC:.)
Type of survey. ................. ....._. _._..________..
Instrument-.^.... -.-.. ....... ., ...-.-...^-..^,..—-—
Accuracy—- .—..—. - -.-........,....... —-. ,......__—.,-——-
Parameters measured———. ^.——.... ..-^s..— .-..—.^
Additional information (for understanding results).
KlGctromagne ti c ______ VLK-EMof survey(s)- - : a^nc -?.. Instrument(s) - Gcornotroi csGK AcrodaY To t ci:. #6 2 A
(specify for each type of survey)
Accuracy-... ........... .....?..Gam(,prcifyfore.chlypcofiui*ty)
Aircraft us* d _ ...
Sensor altmulc
Navigation and night path recovery method
Aircraft altitude____...... ...?iP.OL..______.-.._______Line SpacingMiles flown over total arca..—.-jyZ2.2-..__... — ____.______Over claims only
"I he r ".inirvj Act fV["io'"sI.rvtsur '
Airborne !-:3 octroir.a^notic , 1'arnot ic , VhF - J-XClaim HoUUi(i)
Sunexco Knorgy Corporation
V.'hite Lake CO'Pti-%; i en." 5 ! -. i- -.t s No.
T /. :s/
Suite 2603 ^'9i; Burrard St. p. 0. Box/^130 Vancouvor V'/X 1JS.'K'V Coi'.|.rt!W |fl..rtu' Sjt.ty i', c ,,,, ft, iol . i ' :f ' .' './s r..* :,r. c Cut
Aorodat Liir.itcdN'*n.e ino Addrfil o* Aulho' (o( Geo Tec hn.cal t enon
18.5
Complnc ifvi-ijc si Jc and enter lotalls) here
Airborne C'.•.till
Noto S.-t-c^ 1 , '('visions i f li'LifoM,^!
credits do cot apply to Airborne Surveys.
, —QlM'Xi!?™1 jSQJLExpenditures (excludes power stripping)f ype of Wo: k Pa
R*yi |.e. C'o.'ii
26.66
26.66
126.66
M in ri g ri,"r i us Tin vi 'i'.'li ! l. lit in ni.i.'iii/i seal ','. r;:.'-, iic.el
Fenton Scott 17 Kalabar Place Don Kills Ontario K3B 1 A/ttS Rft'i'.n.'SH'ii pt-'i r.'n.li Clcdril in C'jl^nris ot i ivjht
cu " 10 '" n,.i.i.nt:t*i i r' iMS ;; Cld.iT
For dist suivcy: j
Enitr 40 days. (This : inclui!t-s l int C ulling) i. t.,. , , ,, i
For tiocli o'.iiiitlO'idl suivcy: u^ing the Sbr:it- j'id:
Enter ?0 days ((or each)
C-1-oi.lif.'iiiitjl
on Citinilt)
Toul Ei
[s n D*yf
Total O*v* C'tcl'U may Le apportioned *' .ne clairr, f.ol tnO'C* Enitf numb*' of ctayi cieu-ts j-e' t lauri veluci*d in colunini at right.
M, rung C'iiiiTi
P'o'.K \'urr.l.*r
SSM . 66067.1.
73
6606798081
\ 82l . 66063? .
88 89
9192
i . . 93.
959697
' V 98660717
18 -M 9
Dj-,-1 C'.
-
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F - c-t ix i *1 -. -,rt,[,er
S SK j 660729 .
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SAULT STE. MARIEW;f.'!NG DIV.
E C E 1 V F. f)
SEPi ^1983Oilft.11 10 i ^ o j . * vjly|JljJ^j ] 1, i-Ij'Ji ( (
i |
\ E c ^r^l i
•!. i . ' *" . .
!i?^?iJM.2ji :.:\ .;,'i "~ " — ~
ToTti* nufnt't' O mining j Ct2"nii cOvt'bO ti^ Jhil l 1 frtJO' I O* i-VO'h. 1 '
L kf.tNd.
Days O.
- - - -
-
l \
J
V)
j. ;;- j
?.4
l—————— , -^-—. ——.J ...,--—..--.-...l-- :—— ——.....^J4r--4~t-r-l^v—l *i*irtnf-i.t^Ctft'fiCct'On VcrifyinQ Rti'on of work
For Office Use- Only ""
^ i r^TJ j i ' /j
TZmrT
*/. /'-
l hereby certily O,at l h* ve n (x-rsonal and intitule knov.'li clje of the Ions se! (oil h in iht Report o* Work ir.-.e x c! hi" t lo. r;,., i r.g p^rf, r mi d the work
or rt.messed strr* dur.nj e:id,'ur Et.^r its tonu-Vnon ind tht , r . r, t j ed report is true.
mt and Post*' Aoclrest o ( Ptrfcor. Ortily np
Fenton Scott 17 Kalabar Place.....Don MlUe__K.jr.
. Geotechnicali Natural t,
*J Resources R e POrt
Dntano Approval
Filt
loMining Lends Comments
: Geophysics
j Approved Q J Wish to tee nQBin with corrections
To: Geology- Expenditures
Comment*
j j Approved j ] With to see egaln with correction!Date Signature
To: Geochemistry
Comment!
With to tee 'jaln with correction!Dete Bigxeiure
~"~To: f/'ning L.mds Section, P.oom 6462, Whitney Dlock. (Tel: 5-1380)
503 (61/10)
1983 10 13 2.5866]
Mrs. M.V. St. OulesMining RecorderMinistry of Natural Resources875 Queen Street EastP.O. Box 669Sault Ste. Marie, OntarioP6A 5N2
Dear Madam:
Ue have received reports and naps for an Airborne Geophysical (Electromagnetic, Magnetometer and YLF) survey submitted on mining claims SSM 660671 in the Area of White Lake.
This material will be examined and assessed and a statement of assessment work credits will be Issued.
Yours very truly,
E.F. AndersonDirectorLand Management Branch
Whitney Block, Room 6610Queen's Park , ~Toronto, OntarioH7A 1W3Phone: (416)965-1380 . ;;
R. P1chette:dvg
cc: Sunexco Energy Corporation Suite 2803* 595 Burrard Street P.O. Box 49130 Vancouver, B.C. V7X 105
Fenton Scott 17 Malabar Place Don MHls, Ontario M3B 1A4
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19
FOo
x01o(^
od/z
HEMLO PROJECT
SUNEXCO ENERGY CORR
ELECTROMAGNETIC PROFILE MAP COAXIAL
SCALE 1/15,0009^-—. l Kilometre
1/2 Mil*
T LIMITED
DATE: March-June 1983
N. T. S. No -
P No'
86*00'
48-45",
Marathon
HELICOPTER ELECTROMAGNETIC ;t'~j'
Coil Configuration -CoaxialSeparation " 7 m etres Frequency -43OO Hz.
Mean Sensor Altitude -30 metresHorizontal Positioning-MRS m radar positioning
p.p.m, 30 320 -
10-
0
N-In-phase
Quadrature
4aC13SE6*55 42CI3SE0812 WHITE LAKE (NORTH) 200
x
HEMLO PROJECT
SUNEXCO ENERGY CORP
ELECTROMAGNETIC PROFILE MAP COPLANAR
SCALE 1/15,000 O K i lorn* t r*
1/2 1/2 Mil*
iT LIMITED
DATE: March-June 1983
N. T. S. No :
'AP
86-OO'
48-45
HELICOPTER EL^CTf^felAGNEtlC SYSTEMCoil Configuration -CoplOnar
Septet Ion - 7 metresFrequency - 4100 Hz.
Mean Sensor Altitude - 30 metresHorizontal Positioning-MRSHE radar positioning
pp.m. 130 q
80 :
N-In-phase
Quadrature
42C13SE0eS5 42C13SE0012 WHITE LAKE (NORTH) 21O
A\\
c
HEMLO PROJECT
SUNEXCO ENERGY CORR
VLF-EM TOTAL FIELD
SCALE 1/15,000 O l K t lo m* r re
1/2 1/2 Mil*
AERODAT LIMITED
DATE' March-June 1983
N. T. S. No :
1AP N o-' 3
48*45'
86*00'
VLF-EM
Instrument: Herz Totem 2AStation^ NAA Cutler, Maine-17.8 kHz.
Mean Sensor Altitude: 45 metresHorizontal Positioning: MRS IE radar positioning
500/0........ \-N-20/0 ........
contour interval 2*VoNOTE: The total field will usually indicate
a local maximum over the upper edge of a steeply dipping conductor,
4aci3SEa055 42ci3seaai2 WHITE LAKE 230
HEMLO PROJECT
SUNEXCO ENERGY CORR
TOTAL MAGNETIC FIELD
SCALE 1/15,000 P l K i lorn* t r*
1/2 Mil*
J LIMITED
DATE' March-June 1983
N. T. S. No :
IAP
86*00'MAGNETOMETERInstrument - Geometrics Q-803Mean Sensor Altitude: 45 metresHorizontal Positioning- MRS m radar positioning
250. gammas.
50 gammas.
10 gammas, contour interval 10 gammas
fN
4SC13SE005S 42C13SE00I2 WHITE LAKE C NORTH) 230
HEMLO PROJECT
SUNEXCO ENERGY CORP
INTERPRETATION
SCALE 1/15,000 O Kilometre
1/2 1/2 Mile
AERODAT LIMITED
DATE' March-June 1983
N. T. S. No '
\P
48*45
66 INTERPRETATION
Interpreted conductive axis within bedrockPossible conductive axis within bedrockProbable cultural conductor
AERODAT HEM SYSTEM RESPONSE VERTICAL HALF-PLANE
-N-
100
IN-PHASE (ppmj
42CI3SE0B55 42C13SE00I2 WHITE LAKE (NORTH) 2-40