By: David R. Bell, B. Se., Consulting Geologist.

17
l l l l l l l l l l l l l l l l l l l 42C12NWG137 2 .5274 MOLSON LAKE 010 REPORT ON EM-l6 (VLF) AND MAGNETOMETER SURVEYS ON THE BRIDGE RESOURCES LTD. HEMLO AREA THUNDER BAY MINING DIVISION ONTARIO Tiiranins, Ontario October l, 1982 By: David R. Bell, B. Se., Consulting Geologist.

Transcript of By: David R. Bell, B. Se., Consulting Geologist.

Page 1: By: David R. Bell, B. Se., Consulting Geologist.

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42C12NWG137 2 .5274 MOLSON LAKE 010

REPORT ON EM-l6 (VLF) AND

MAGNETOMETER SURVEYS

ON THE

BRIDGE RESOURCES LTD.

HEMLO AREA

THUNDER BAY MINING DIVISION ONTARIO

Tiiranins, Ontario October l, 1982

By: David R. Bell, B. Se., Consulting Geologist.

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INTRODUCTION

A control grid was cut over the entire Bridge Resources Ltd,

property in November 1981 and subsequently magnetometer and EM16 (VLF)

surveys were carried out to aid in geological interpretation of the area.

PROPERTY LOCATION AND ACCESS

The Bridge Resources Ltd. property consists of seventeen contiguous unpatented mining claims located near Hemlo in the Thunder

Bay Mining Division. The claim group lies approximately 2.8 miles

(4.6 Km) north of the Corona Resources Ltd. gold discovery.

The claims are numbered TB393009-TB393023 inclusive, TB622789, and TB 622790.

Access to the property is via a gravel road which leaves Highway 614 at a point 2.3 miles (3.8 Km) north of the Highway 17

junction. This gravel road ends in a gravel pit 0.6 miles (l Km)

west of Highway 614. From there it is necessary to walk cross country approximately 0.8 miles (1.3 Km) to reach the southeast corner of the property.

GEOLOGY

Ontario Geological Survey Map 2452 shows only very minor

outcrop to occur over the entire property. With the exception of one

outcrop of biotite hornblende granodiorite in the southwest corner of

the property and one outcrop of intermediate to felsic volcanic or

tuff e. 1 1 outcrops were mapped as sediments.

SURVEY INSTRUMENTS AND PROCEDURE

One mile of baseline and 1600 feet of tie line wereestablished at an azimuth of 230 0 . Cross lines were cut at right angles to the baseline at 400' intervals. A total of 15.75 miles of line

were cut.

1. Muir, T.L. 1980: Ontario Geological Survey Map 2452Precambrian Geology Series Scale l inch ^ % mile Geology 1978.

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Remote Sensing and Interpretation

PORTABLE PROTON MAGNETOMETER MODEL G-816

Data/Price Sheet

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June 1 974

* KXMXXcomplete S2600

* 1 gamma sensitivity and repeatability

Very small size and weight: less than 12 Ibs complete with battery and sensor

Over 10,000 readings per set of alkaline "D" cell (flashlight) batteries

Simplified operation numeric display directly in gammas

Total field measurements- no calibration independent of orientation

The Model G-816 is a complete portable magnetometer for all man-carry field applications. As an accu rate yet s.imple to operate instrument, it features an outstanding combination of one gamma sensitivity and repeatability, compact si?e and weight, operation on standard universally available flashlight batteries, ruggedi?ed packaging and very low price.

The G-816 magnetometer allows precise mapping of very small or large amplitude anomalies for ground geophysical surveys, or for detail follow-up to aeromagnetic reconnaisance surveys. It is a rugged, light weight, and versatile instrument, equally well suited for field studies in geophysics, research programs or other magnetic mapping application where low cost, dependable operation and accurate measurements are requited.

For marine, airborne or ground recording systems consider GeoMetrics Models G-BO1. G-8Q3, and G-806.

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Based upon the principle of nuclear precession (proton) the G-81G offers absolute drift-free measurements of the total field directly in gammas. (The Proton precession method is the official recognized standard for measurement of the earth's magnetic field.) Operation is worldwide with one gamma sensitivity and repeatability maintained throughout the range. There is no temperature drift, no set-up or leveling req lired, and no adjustment for orientation, field polarity, or arbitrary reference levels. Operation is very simple with no prior training required. Only 6 seconds are required to obtain a measurement which is always correct to one gami'ia, regardless of operator experience. Only the Proton Magnetometer offers such repeatability -an impor tant considi ration even for 10 gamma survey resolution.

Complete Field Portable System

The Model G-816 comes complete, ready for portable field operation ar d consists of:

1. Electronics console with internally mounted and easily replaced 'D" cell battery pack.

2. Proton se nsor and signal cable for attachment to carry ing strap or staff.

3. Adjustable carrying strap.

4. 8 foot collapsible staff.

5. Instruction manual, complete set of spare batteries, re usable si ipping container.

All magnetometers and parts are covered by a one year warranty beginning with the date of receipt but not to exceed fifteen months from the shipping date.

EXPLORANIUM

Sensitivity:

Range:

Tuning:

Gradient Tolerance:

Sampling Rate:

Output:

Power Requirements:

Temperature Rang8 '

Accuracy (Total Field):

Sensor:

Size:

Weight:

PRICE:

SPECIFICATIONS

1 1 gamma throughout range

20,000 to 90,000 gammas (worldwide)

Multi-position switch with signal amplitude indi cator light on display

Exceeds 150 gammas/ft

Manual push-button, one reading each 6 seconds

5 digit numeric display with readout directly in gammas

Twelve self-contained 1.5 volt "D" cell, univer sally available flashlight-type batteries. Charge state or replacement signified by flashing indi cator light on display.

Battery Type Number of ReadingsAlkaline . over 10,000Premium Carbon Zinc over 4,000Standard Flashlight over 1,500NOJE: Battery life decreases with temperature

Console and sensor: -40" lo *850C

Battery Pack: O 0 to*50"C (limited use to -150 C; lower tempera ture operation optional)

11 gamma through O 0 to 50 0 C temperature range

High signal, noise cancelling, interchangably mounted on separate staff or attached to carry ing harness

Console: 3.5 x 7 x 10.5 inches (9 x 18 x 27 cm) Sensor: 4.5x6 inches (l l x 15 cm) Staff: l inch diameter x 8 ft length

(3 cm x 2.44 m)

Lbs.5.542

11.5

Kgs.2.4 1.80-L "5.1

Console (w/batteries): Sensor i signal cable: Aluminum staff:

Complete Field System *2600-.00

DIVISION OF g eoMetrics S ERVICES (CANADA) LTD.

COHPORATION OF CANADA

48 At NESS STREET ' DOWNSVIE W (TORONTO) CANADA

TELEPHONE G6M96G IAHF A CODE 41G) CABLE: EXPLOR

NUCLEAR INSTRUMENT DIVISION

TELEX: 06-22694

Page 5: By: David R. Bell, B. Se., Consulting Geologist.

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|M16 VLF Electromagnetic Unit

Pioneered and patented exclusively by Geonics Limited, the VLF method of electromagnetic surveying has been proven to be a majc r advance in exploration geophysical instrumentation.

Since the beginning of 1965 a largo number of mining compank s have found the EM16 system to meet the need for a simple, light and effective exploration tool for mining geophysics.

The VLF method uses the military and time standard VLF transmissions as primary field. Only a receiver is then used to measure the secondary fields radiating from the local con ductive targets. This allows a very light, one-man instrument to do the ;ob. Because of the almost uniform primary field, good response from deeper targets is obtained.

The EMU system provides the in-phaso a nd quadrature components of the secondary field with the polarities indicated.

Interpretation technique has been highly developed particularly to differeritiate deeper targets from the many surface indications.

Principle of OperationThe VLF transmitters have vertical antennas. The magnetic signal component is then horizontal and concentric around the transmitter location.

Specifications

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Source of primary field

Transmitting stations used

Operating frequency range

Parameters measured

Method of reading

Scale range

Readability

VLF transmitting stations.

Any desired station frequency can be supplied with the instrument in the form of plug-in tuning units. Two tuning units can be plugged in at one time. A switch selects either station.

About 15-25 kHz.

(1) The vertical in-phase component (tangent of the tilt angle of the polarization ellipsoid).(2) The vertical out-of-phase (quadra ture) component (the short axis of the polarization ellipsoid compared to the long axis).

In-phase from a mechanical inclino meter and quadrature from a calibrated dial. Nulling by audio tone.

In-phase 150 07o; quadrature 400Xo.

1 07o.

Reading time

Operating temperature range

Operating controls

Power Supply

Dimensions

Weight

Instrument supplied with

Shipping weight

10-40 seconds depending on signal strength.

-40 to 50 "C.

ON-OFF switch, battery testing push button, station selector, switch, volume control, quadrature, dial 40 D7o, inclinometer dial 15007o.

6 size AA (penlight) alkaline cells. Life about 200 hours.

42 x 14 x 9 cm (16 x 5.5 x 3.5 in.)

1.6kg(3.5lbs.)

Monotonic speaker, carrying case, manual of operation, 3 station selector plug-in tuning units (additional fre quencies are optional), set of batteries.

4.5 kg (10 Ibs.)

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GEONICS LIMITED Designers A manufacturers of geophysical instruments

subsidiary of Deering Milliken Inc.

2 Thorncliffe Park DriveToronto/Ontario/CanadaM4H1H2Tel: (416) 425-1821Cables: Geonic's

Page 6: By: David R. Bell, B. Se., Consulting Geologist.

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/l' ITB

l r fv ' L \ l '"J7"632666 -'612668 't /6~ 4 |632663 *9I676\ J3930I9 393018 [393009 . J

[TB l ~-j TB JTB ~JTB ?\TB JTB ITB /TBi™ ! i l IV \667 |632666 1632669 1632660 169,680 (591677 |s9302bjs930l7 |3930lXoJ622790 |rTB~~~[rB~ |TB~~~|rB"JTB~~|TB~~ lVi~ ITB" "~~~~

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4663*632662 '632661 169,681 .691679 69,67j8. (393021 l ^i-a^ '

~ IT7 ITS, "|TB JTB ITS [TB [TB JTB* 'l i li

i2667|632668 '.691864 (392994 |393003 ^393004 |39302tj3930l6 JM 3 O li 2

ITB !TB |TB JTB j TB iTB 'TB ITB l i-——, ^. l l i ! l "K

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j l l j l "l 1*69 393039)69,866 J392996 |393002 1393005 (393023 393014 I3930xjl3— —ITB— ~^T*——1~ ~ — f~ ~ — 4-~ — -J—— — -L — — -i- —-j^- - J

^JLi^^lJy'Jfr'lit?!?'"!.^:^0! | 3"0̂ .6 L l TB "r- TB" !TB "^ITS

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l l ' 1*^1TTT5. 5044 I39304IJ69I867 1*92997 J39BOOO 1393007 '

TB TB ITB ~TB [rt TB

5046j39.B04*J69,865.1392998 ' J. " 4. J. .J l ™ .J. lITB " ITB [TB "JTB ITB ~|TB r

1046 |69I32I 1891320 J624237 ^624238 l 624239 ',824240

I6J8I3I8 (691319 1*24236 1*24236 J624234 |624233\J TB

TB

624226 1624226 6'*a896

J6I6I26 6,6,27 616126

| T

6,5129 615I30 614760 '1 14760 ~~ ~~ ~~~" ~~~ ~ ~~

lTB lTB

I6I5J20 J

1613697 1613902 1619903 .613*66 | SIJ *^ 7 TB~ ~" l TB~" ~ j TB~ ~ ]TB~ ~ "tfST "~ "tl~

613898 6,3901 '613904 16)3965 1613966 '. —_4___J_f ..4- M _i_ iTB ! TB l TB TTB |TB ~,

6696 j 676896 J624207j 624221 J624222 J624223 '624224|6|8SM .,.,,,

FROM O.M.N.R. G-603 AREA OF MOLSON LAKE Scale l" - ^ mile

DAVID R. BELL GEOLOGICAL SERVICES INC,

Property Location Map

BRIDGE RESOURCES LIMITED

District of Thunder Bay, Ontario

August- 11 . 1982 I Plan No. BR 82-1

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Magnetometer readings were taken at 100 foot intervals along all grid lines using a Geometrics G-816 proton magnetometer. A magnetometer base station was established at LOO, 0+00 BL and assigned

a value of 59753 gammas. Loops were read and tie-ins made at intervals generally less than one hour. From this data a graphical diurnal correction was applied to all data.

An electromagnetic survey using a Geonics EM16 VLF electromagnetic unit was carried out to obtain both structural and stratigraphic information. The EM16 survey was done using the remote sensing station at Cutler, Maine. In phase and quadrature readings were taken at each station (100' intervals) along all grid lines and

the results were plotted and profiled on the accompanying map.

SURVEY RESULTS

The area of relatively high magnetic background in the southwest corner of the property (lines 44W, 40W, 36W) is due to the presence of an outlier of the Cedar Lake Pluton. The magnetic high centered at US and L28W may be a result of a smaller body of similar, hornblende biotite granodiorite.

The north trending magnetic anomaly which skirts the east side of the southern half of the claim group and cuts through TB622689 and TB 622690 is caused by a relatively large regional diabase dyke which can be traced for several miles.

The relative low magnetic relief, swampy conditions and

discontinuous nature of the EM16 crossovers makes interpretation of

the data virtually impossible.The crossovers at 13S on line 32W and 16S on line 28W

may bc related to a bedrock source as may the crossover which occur on lines AE, O and AW at 12N, ION, and 8N respectively. As well as masking bedrock conductor's the low swampy conditions may prevent

penetration to the bedrock surface.

RECOMMENDATIONS AND CONCLUSIONS

The general lack of information obtained from these surveys necessitates the running of either a more sophisticated

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J vertical loop EM survey or a detailed horizontal loop EM survey over

the entire group. Geological mapping should also be carried out over the l entire group to aid in geological interpretation.

B Respectfully submitted,

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I Timmins, Ontario. David R. Bell, B. Se., October l, 1982 Consulting Geologist.

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Page 9: By: David R. Bell, B. Se., Consulting Geologist.

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CERTIFICATION OF QUALIFICATIONS

I, David R. Bell, hereby certify:

That I am a consulting Geoloigst employed by

David R. Bell Geological Services Inc., Suite 6

251 Third Avenue, Timmins, Ontario.

That I am a graduate of Carleton University, OttawaOntario, with a degree Bachelor of Science (B. Se.)in geology, 1973.That I have been practicing my profession as ageologist continuously since 1973.

That I am a Fellow of the Geological Associationof Canada (1981), and a Member of the CanadianInstitute of Mining and Metallurgy.

That I do not have, nor do I expect to receive,

neither direct or indirect any interest in the

property described in this report, nor in thesecurities of Bridge Resources Ltd.

Timmins, Ontario David R. Bell, (B. Se.) October l, 1982 Consulting Geologist.

Page 10: By: David R. Bell, B. Se., Consulting Geologist.

42CI2NWCII37 2 .5274 MOLSON LAKE 300

June 27. 1983 2.5274

Bridge Resources Ltd P.O. Box 10108 Suite 1030609 Granvllle Street Vancouver, B.C. V7Y 1C6

Dear Sirs:

RE: Geophysical (Electromagnetic and Magnetometer) Survey submitted on Mining Claims TB 393009 et al 1n the Area of Molson Lake

Please disregard my letter dated June 2, 1983 requesting a report signature and a key map. Another set of maps and reports have been submitted with all the required Information. The maps were submitted 1n duplicate so there Is no need to return the maps sent to you.

I apologize for any Inconvenience this may have caused.

Yours very truly,

E.F. AndersonDirectorLand Management Branch

Whitney Block, Room 6450Queen's ParkToronto, OntarioM7A 1W3Phone:(416) 965-1380

R. P1chette:mc

cc: Mining RecorderThunder Bay, Ontario

cc: D. Bell251 Third Avenue Suite 14 Box 1250Timmins, Ontario P4N 7J5

Page 11: By: David R. Bell, B. Se., Consulting Geologist.

1983 06 02 2,5274

Bridge Resources Ltd. P.O. Box 10108 1030-609 Granvllle Street Vancouver, B.C. V7Y 1C6Dear Sirs:

Re: Geophysical (Electromagnetic and Magnetometer) Survey submitted on Mining Claims TB 393009 et a l 1n the Area of Molson lake m^m^^^.

Enclosed are the plans. In duplicate, for the above mentioned survey. Please have the author of the report date and sign each map and return them to this office. In addition we require a key map showing the location of the property with respect to township boundaries, established reference lines and easily Identified topographic features. This map should be an Inset in the geophysical plans or an Insert 1n the report.

For further Information, please contact Mr. F.W. Matthews at 416/965-1380.

Yours very truly,

E.F. AndersonDirectorLand Management BranchWhitney Block, Room 6450Queen's ParkToronto, OntarioM7A 1W3Phone: 416/965-1380R.P1chette:e1b ends.

cc: Mining RecorderThunder Bay, Ontario

cc: D. Bell251 Third Ave. Suite 14, Box 1250 TIMMINS, Ontario P4N 7J5

Page 12: By: David R. Bell, B. Se., Consulting Geologist.

ofResfJGrces

Ontario

Report of Work(Geophysical, Geological, Geochemical and Expenditures)

The Mining Act

Instructions: - Please type or print.' If number of mining claims traversed

exceeds space on this torm, attach a list.Note: Only days credits calculated in the

"Expenditures" section may be enteredin the "Expend. Days Cr." columns.

- Do not use shaded areas below.Type of Survey(s)

GEOPHYSICAL - Mag and VLF (EM16)Claim Holder (f)""" --- ~ - ----~-- - - - ---- ..- ] Township or Area

Molson Lal

BRIDGE RESOURCES LTD.Address

Survey Company

Prospect

P.O. Box 10108, 1030-609 Granville S t^ , Vancouver, B.C.82

^?ayJ JMo.1 jTll-

Company (Date of Survey (from fi* to)

Mid Canada Exploration Services __ | pay l MO. ; Yr. | DayName and Address of Author (of Geo-Technical report)

_____Bruce Durham, Box 636, Marathon, OntarioCredits Requested f^er Each Claim in Columns at rightSpecial Provisions

For first survey:Enter 40 days. (This includes line cttting)

For each addition* l survey: using the same grit :

Enter 20 days (for each)

Man Days

Complete reverse side and enter total(s) here

Airborne Credits

Note: Special provisions credits do not apply to Airborne Surveys.

Geophysical

- Electromagnetic

- Magnetometer

- Radiometric

- Other

Geological

Geochemical

Geophysical

- Electromagnetic

- Magnetometer

- Radiometric

- Other

Geological

Geochemical

Electromagnetic

Magnetometer

Radiometric

Days per Claim

40|20

Days per Claim

————— .

Days per Claim

——————

Mining Claims Traversed (List in numerical sequence)

Expenditures (excludes power stripping)Type of Work Performed

Performed on Claim!;)

Calculation of Expenditure Days Credits

Total ExpendituresTotal

Days Credits

InstructionsTotal Days Credits may be apportioned at the claim holder's choice. Enter nun ber of days credits per claim selected in columns at righ:.

Mining ClaimPrefix

TB

"

!

i - ' '.. .

Number

393009

393010

393011

393012

393013

393014

393015

393016

393017

393018

393019

393020

393021

393022

393023

622789622790

Expend. Days Cr.

Mining ClaimPrefix

' ' f - 'r'

Number

RECF' Ann o r* i

nUu a O l

NINC LANDS

QVV.A75 ' i J !)

Expend. Days Cr.

ft***

Jfi9 Wt

sea i

Total number of mining claims covered by this -i -j report of work. -L '

^N

For Office Use OnlyTotal Days Cr. Date Recorded Recorded

Ip

Recorded Holder or AJent (Signature)

Certification Verifying Re'p'rjft of Work'l hereby certify tt at l have a persona! and intimate knowledge of the facts set forth in the Report of Work annexed hereto, having performed the work or witnessed same during and/or after its completion and the annexed report is true.

Name and Postal Adc ress of Person Certifying

Bruce Durham, Box 636, Marathon, Ontario

136,-

DateCertified Certifjad by (Signature) j,

Page 13: By: David R. Bell, B. Se., Consulting Geologist.

oi GeotechnicalSeTces R*P"t

Ontario Approval

Mining Lands Comments

Y Y O-O f'"...'A '"A.:*-y,!

V AN , V'V V' ^ ^\ ' v .' - ^J ,: ^

To: Geoph\sics

Comments

Q] Wish to see again with correctionsSiflnBture

To: Geology - ExpendituresComments

Approve d Wish to see again with correctionsDate Signature

To: Geochemistry

Comments

[ j Approve J Q Wish to see again with correctionsDate Signature

[ [TO: Mining Lands Section, Room 6462, Whitney Block. (Tel: 5-1380)

1593 (81/10)

Page 14: By: David R. Bell, B. Se., Consulting Geologist.

1982 12 21

264

,t 2.527f

Mrs. Audrey HayesMining Recorder ,,Ministry of Natural Resources.P.O. Box 5000Thunder Bay, Ontario ~,P7C 5G6

Dear Madam: ,; ..,,1r.#

Vie have received reports and maps for a,Geophysical (Electromagnetic and Magnetometer).Survey.submitted, under Special Provisions (credit for,Performance .and Coverage) on Mining Claims TB 393009 et.al 1n the Area of Molson Lake. , , , ,,,, ,, ,,. ,

' t

This material will be examlned.and assessed and a sUtement of assessment work credits will be Issued,

v

Tours very truly ,;U,.. .,..,.,

E.F. AndersonDirectorLand Management Branch

Whitney Block, Room 6450Queen's ParkToronto, OntarioM7A 1W3Phone: 416/965-1380

OW:sc

cc: Bridge Resources Limited Vancouver, S*C.

cc? David R. Bell Timmins, Ontario

Page 15: By: David R. Bell, B. Se., Consulting Geologist.

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Page 16: By: David R. Bell, B. Se., Consulting Geologist.

Contour Intervals'Gn gammas)

As t.

BRIDGE RESOURCES LTD.

MAGNETIC SURVEYHEMLO AREA

Thunder Bay Mining Division Ontario

200SCALE : 1 inch to 200 feet

DRAWN BY: w e

Page 17: By: David R. Bell, B. Se., Consulting Geologist.

As t.

BRIDGE RESOURCES LTD.

V.L.F SURVEYHEMLO AREA

Thunder Bay Mining Division Ontario

42C12NW6137 2.5274 MOLSON LAKE 210

SCALE : 1 inch to 200 f eet

DRAWN BY : W. B Cougrttl