32D85SW8124 2.9622 BISLEY 010

REPORT ON AN

AIRBORNE MAGNETIC AND VLF-EM SURVEY

BISLEY TOWNSHIP

LARDER LAKE MINING DIVISION, ONTARIO

for

MR. F. TAGLIAMONTE

by

RECEIVEDBE;c 11 1986

MINING UNDS SECTION

TERRAQUEST LTD. Toronto, Canada

December 5, 1986

TERRAQUEST LTD.

010C

1. INTRODUCTION l

2. THE PROPERTY l

3. GEOLOGY l

4. SURVEY SPECIFICATIONS 2

4.1 Instruments 24.2 Lines and Data 34.3 Tolerances 34.4 Photomosaics 3

5. DATA PROCESSING . 4

6. INTERPRETATION 5

6.1 General Approach 56.2 Interpretation 5

7. SUMMARY 6

LIST OF FIGURES

Figure l - General Location MapFigure 2 - Survey Area MapFigure 3 - Sample RecordFigure 4 - Terraquest Classification of VLF-EM Conductor Axes

LIST OF MAPS IN JACKET

No. A-649-1, Total Magnetic FieldNo. A-649-2, Vertical Magnetic GradientNo. A-649-3, VLF-EM SurveyNo. A-649-4, Interpretation

TERRAQUEST LTD.

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1. INTRODUCTION

This report describes the specifications and results of a geophysical survey carried out for Mr. F. Tagliamonte of 29 Beaver Crescent, North Bay, Ontario, PlA 3N1 by Terraquest Ltd., 905 - 121 Richmond St. W., Toronto, Canada. The field work was performed on October 18, 1986 and the data processing, interpretation and reporting from October 19 to December 5, 1986.

The purpose of a survey of this type is two-fold. One is to prospect directly for anomalously conductive and magnetic areas in the earth's crust which may be caused by, or at least related to, mineral deposits. A second is to use the magnetic and conductivity patterns derived from the survey results to assist in mapping geology, and to indicate the presence of faults, shear zones, folding, alteration zones and other structures potentially favourable to the presence of gold and base-metal concentration. To achieve this purpose the survey area was systematically traversed by an aircraft carrying geophysical instruments along parallel flight lines spaced at even intervals, 100 metres above the terrain surface, and aligned so as to intersect the regional geology in a way to provide the optimum contour patterns of geophysical data.

2. THE PROPERTY

The property is located in Bisley township, in the Larder Lake Mining Division of Ontario about 20 kilometres north of the town of Kirkland Lake. The claims lie in the centre of the northwest quadrant of the township and can be reached by bush roads.

The latitude and longitude are 48 degrees 21 minutes, and 80 degrees 00 minutes respectively, and the N.T.S. reference is 32D/5 and 42A/8.

The claim numbers are shown in figure 2 and listed below: L 842940-842946.....total 7 claims

3. GEOLOGY

Map References

1. Map 2205: Timmins-Kirkland Lake, scale 1:253,440. O.D.M. 19732. Map 2252: Melba and Bisley Townships, scale 1:31,680.O.D.M.19723. Map P.2434: Magusi River Area - Precambrian Geology, scale

1:63,360. O.G.S. 19824. Map P.2483: Magusi River Area. Quaternary Geology, scale

1:63,360. O.G.S. 1982

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FIGURE 1.

General Location Map

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The property is covered by a discontinuous layer of stoney to sandy till. Topographic depressions contain swamps and Pleistocene deep water lacustrine clays.

The property is underlain by an east trending volcanic-sedimentary suite of rocks. These include iron-rich and magnesium-rich mafic volcanics, felsic and intermediate volcanics with associated sediments and minor mafic intrusives. Regional faults trend to the northwest andnortheast. ss a

Gold and base metal mineralization occurs in similar rocks to thewest in Melba township and to the north in Thackery township.

l 4. SURVEY SPECIFICATIONS

4.1 Instruments

The survey was carried out using a Cessna 182 aircraft, registration C-FAKK, which carries a magnetometer and a VLF electromagnetic detector.

The magnetometer is a proton precession type based on the Overhauser effect. The Overhauser effect allows for polarization of a proton rich liquid of the sensor by adding a "free radical" to it and irradiating it by RF magnetic field. Strong precession signals are generated with modest RF power. The sensor element is mounted in an extension of the right wing tip. It's specifications are as follows:

Resolution: 0.5 gammaAccuracy: 0.5 gammaCycle time: 0.5 secondRange: 20,000 - 100,000 gammas in 23 overlapping stepsGradient tolerance: Up to 5000 gammas per metreModel: GSM-9BAManufacturer: GEM Systems Inc., 105 Scarsdale Rd.,

Don Mills, Ontario, MSB 2R5

The VLF-EM unit uses three orthoganol detector coils to measure (a) the total field strength of the time-varying EM field and (b) the phase relationship between the vertical coil and both the "along line" coil (LINE) and the "cross-line" coil (ORTHO). The LINE coil is tuned to a transmitter station that is ideally positioned at right angles to the flight lines, while the ORTHO coil transmitter should be in line with the flight lines. It's specifications are:

Accuracy: 'i.%Reading interval: 1/2 secondModel: TOTEM 2AManufacturer: Herz Industries, Toronto

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FIGURE 3. Sample of analogue data

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The VLF sensor is mounted in the left wing tip extension.

Other instruments are:

King KRA-10A Radar altimeterUDAS-100 data processor with Digidata nine track tape recorder,

manufactured by Urtec Ltd., Markham, Ontario.Geocam video camera and recorder for flight path recovery,

manufactured by Geotech Ltd., Markham, Ontario.

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4.2 Lines and Data

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Line spacing: Line direction: Terrain clearance: Average ground speed: Data point interval:

Magnetic: VLF-EM:

Tie Line interval:Channel Channel Line km Line km

12

{LINE}: (ORTHO):

100 metres 360 degrees 100 metres 156 km/hr.

27 metres 27 metres 2 kilometres NAA Cutler, 24 NSS Annapolis.

O kHz 21.4 kHz

over total survey area including overrun: 60 line kmover claim group: Magnetic survey totals....

VLF-EM survey totals,3030

line km line km

4.3 Tolerances

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a) Line spacing: Any gaps wider than twice the line spacing and longer than 10 times the line spacing were filled in by a new line.b) Terrain clearance: Portions of line which were flown above 125 metres for more than one km were reflown if safety considerations were acceptable.c) Diurnal magnetic variation: Less than twenty gammas deviation from a smooth background over a period of two minutes or less as seen on the base station analogue record.d) Manoeuvre noise: Approximately +/-S gammas.

4.4 Photomosaics

For navigating the aircraft and recovering the flight path, mosaics of aerial photographs were made from existing air photos.

5. DATA PROCESSING

Flight path recovery was carried out in the field using a video tape viewer to observe the flight path as recorded by the Geocam video

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camera system. The flight path recovery was completed daily to enable reflights to be selected where needed for the following day.

The magnetic data was levelled in the standard manner by tying survey lines to the tie lines. The IGRF has not been removed. The total field was contoured by computer using a program provided by Dataplotting Services Inc. To do this the final levelled data set is gridded at a grid cell spacing of 1/lOth of an inch at map scale.

The vertical magnetic gradient is computed from the total field data using a method of transforming the data set into the frequency domain, applying a transfer function to calculate the gradient, and then transforming back into the spatial domain. The method is described by a number of authors including Grant, 1972 and Spector, 1968. The computer program for this purpose is provided by Paterson, Grant and Watson Ltd. of Toronto

The VLF data was treated automatically so as to normalize the non conductive background areas to 100 (total field strength) and zero (quadrature). The algorithms to do this were developed by Terraquest and will be provided to anyone interested by application to the company.

All of these dataprocessing calculations and map contouring were carried out by Dataplotting Services Inc. of Toronto.

INTERPRETATION

6.1 General Approach

To satisfy the purpose of the survey as stated in theintroduction, the interpretation procedure was carried out on both the magnetic and VLF data. On a local scale the magnetic gradient contour patterns were used to outline geological units which have different magnetic intensity and patterns or "signatures". Where possible these are related to existing geology to provide a geological identity to the units. On a regional scale the total field contour patterns were used in the same way.

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Grant, F.S. and Spector A., 1970: Statistical Models for InterpretingAeromagnetic Data; Geophysics, Vol 35

Grant, F.S., 1972: Review of Data Processing and InterpretationMethods in Gravity and Magnetics; Geophysics Vol 37-4

Spector, A., 1968: Spectral Analysis of Aeromagnetic maps;unpublished thesis; University of Toronto

TERRAQUESTLTD.

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Faults and shear zones are interpreted mainly from lateral | displacements of otherwise linear magnetic anomalies but also from long narrow "lows". The direction of regional faulting in the general area is taken into account when selecting faults. Folding is usually seen as curved regional patterns. Alteration zones can show up as anomalously quiet areas, often adjacent to strong, circular anomalies that represent intrusives. Magnetic anomalies that are caused by iron deposits of ore quality are usually obvious owing to their high amplitude, often in tens of thousands of gammas. s

acVLF anomalies are categorized according to whether the phase

response is normal, reverse, or no phase at all. The significance of the differing phase responses is not completely understood although in f general reverse phase indicates either overburden as the source or a conductor with considerable depth extent, or both. Normal phase response is theoretically caused by surface conductors with limited depth extent.

Areas showing a smooth response somewhat above background {ie. 110 or so) are likely caused by overburden which is thick enough and conductive enough to saturate at these frequencies. In this case no response from bedrock is seen.

6.2 Interpretation

The total magnetic field has a relief of approximately 320 gammas and is dominated by a strong anomaly to the northeast. The vertical magnetic gradient data enhances secondary trends across the northern part of the survey area. The following notes supplement the accompanying data and interpretation maps which represent the objective of the survey.

The strong magnetic responses are interpreted to be iron-rich mafic volcanics (Unit 1m). The responses from this unit dominate the entire magnetic pattern. The actual correlations between mapped exposures and the magnetic outlines are not totally consistent suggesting a high degree of lithological complexity, possibly as interfingering of various rock types.

The remaining mapped lithologies all possess moderate to low magnetic activity and in general are not resolvable by magnetic techniques. The inclusion of these units on the interpretation map is based on the O.G.S. geological map. The intermediate volcanics and associated sediments to the southwest correlate with the lowest magnetic response. The responses across the centre of the survey area are overwhelmed by the magnetic field from the iron-rich mafic volcanics.

The regional northwest trending fault with several similar faults

TERRAQUESTLTD.

Suite 905, 121 Richmond Street West, Toronto, Canada, M5H 2K1, Telephone (416) 869-0010

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and at least one northeast trending fault have been interpreted from the magnetic data.

Numerous moderate to strong VLF-EM conductor axes have been identified and evaluated according to the Terraquest classification system (Figure 4). This system correlates the nature and orientation of the conductor axes with stratigraphic, structural and topographic features to obtain an association from which one or more origins may be selected. Alternate associations are indicated in parentheses.

Conductivity related to faulting may possess mineralogic sources (including graphite, sulphides or fault gouge) or ionic sources (porosity in the bedrock or overburden). Faults identified by magnetic or VLF-EM techniques may provide structural control for epithermal mineralization.

Several conductor axes conform to stratigraphic trends, both magnetic and nonmagnetic horizons. These possess potential for stratabound bedrock sources and are recommended for further work by ground EM or IP methods.

7. SUMMARY

An airborne combined magnetic and VLF-EM survey has been done on the property at line intervals of 100 metres. The total field and vertical gradient magnetic data, VLF-EM data and interpretation maps are produced at a scale of 1:10,000.

The magnetic data has been used to modify and update the existing geology and has shown a number of new contacts and faults. A number of VLF-EM conductor axes were found of which some are believed to have potential sulphide origins and have been recommended for additional investigation.

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Charles Q. Barrie, M.Se Geologist

TERRAQUEST LTD.

32D05SWat24 2.9622 BISLEY 900

Mining Act

Note: — Only any.- cream ea ^j.atec^ m -r "Expenditures" sect so^ "".sv bf; on ter- in the " Exnend. Davs C'." coium Do not use jnaoea areas c-:.ow.

A l le fee S. SOCL (JNArea

Prospector's Licence No.

fceat'rtQt(z.Survey Company

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Date of Survey (from Si to) .Total Miles of line Cut

Day l Mo. ' Yr. J Day | Mo. | Yr. -——-————————^-^

Ci'ecit: ~eauesiec oer Each Claim in Columns at riant

ror rirst survey:

Enter 40 riays. {This includes line cutting)

For eacn additional survey: usmg :ne same grin:

Enter 20 days (for each)

Geophysical

- Electromagnetic

- Magnetometer

- RadiOmetric

- Other

Geological

1 Geochemical

Days oer Claim

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ExoenaituresTotai

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•Viinincj Claims Traversed (List in numerical sequence)Mining Claim

Prefix Number

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Expend. Davs Cr.

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Total numoer of mining claims covered by this report of work.

For Office Use Only

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ays Cr. Date ReyCO.raed

Date Approved as Recorded

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LEGENDTerrain Clearance Line Spacing .....

100 meters 10O meters

10OO gammas25O gammas

50 gam mas1O gammas

MR. F. TAGLIAMONTE

AIRBORNE MAGNETIC SURVEYTOTAL MAGNETIC FIELD

BISLEY TOWNSHIP. ONTARIO

N.T.S. MO. 320/5, 42A/8

SCALE: 1:10,000

DRAWING NO. A~649- 1

DATE: December 1986

TERRAQUEST LTD.TORONTO, CANADA

32D05SW0124 2.9S22 BISLEY 210

1003

4-

LEGENDTerrain Clearance Line Spacing .....

100 meters 10O meters

2.5OO gammas i meter .500 gammas l meter .1OO gammas l meter .025 gammas l meter

MR. F. TAGLIAMONTE

AIRBORNE MAGNETIC SURVEYVERTICAL MAGNETIC GRADIENT

Calculated From Total Field

BISLEY TOWNSHIP, ONTARIO

N.T.S.NO. 32D/5. 42A/8

SCALE: 1:10,000

DRAWING NO. A~649~2

DATE: December 1986

TERRAQUEST LTD. ®TORONTO. CANADA

32D05SW0124 2.9622 BISLEY 220

03

iVLF Transmitter

NAA Cutler

24.0 kHz

Azimuth 108

LEGENDTerrain Clearance Line Spacing .....

100 meters 1OO meters

Field Strength 50"*) 1O9b

QUADRATURE Normal Slope Reverse Slope

MR. F. TAGLIAMONTE

AIRBORNE VLF-EM SURVEYCONTOURS OF TOTAL FIELD STRENGTH

PROFILES OF QUADRATURE

BISLEY TOWNSHIP. ONTARIO

N.TS.NO 32D/5, 42A/8

SCALE: 1:10,000

DRAWING NO. A~649~3

DATE: December 1986

TERRAQUEST LTD.TORONTO. CANADA

320855*8124 2.9622 BISLEY 230

-_____LEGEND_______INTERPRETATION

——————— Contact——————— Fault ^^——^^— Property Boundary

VLF-EM Conductor Axes9*9 normal quadrature

K M reverse quadrature l l l l l total field only

See text for classification of conductors.Terrain Clearance .......... 10O metersLine Spacing ............... 100 meters

LITHOLOGY

1m

Mafic Intrusives

Magnesium-rich Mafic Volcanics

Iron-rich Mafic Volcanics

Intermediate Volcanics

Felsic Volcanics

VLF Transmitter NAA Cutler

24.0 kHz Azimuth 108

MR. F. TAGLIAMONTE

INTERPRETATION

BISLEY TOWNSHIP. ONTARIO

N.T.S.MO. 32D/5, 42A/8

SCALE: 1:10,000

DRAWING NO A~649~4

DATE: December 1986

TERRAQUEST LTD. ®TORONTO. CANADA

32D85SW3124 2.9622 S lSLEY 240