COMINCO LTD. GEOPHYSICAL REPORT ON AN INDUCED POLARIZATION SURVEY RIM PROPERTY RAFT RIVER AREA KAMLOOPS MINING DIVISION,

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1 COMNCO LTD. EX PLORAT ON WESTERN DSTRCT NTS: 82M/13E 25 JUNE 1981 GEOPHYSCAL REPORT ON AN NDUCED POLARZATON SURVEY RM PROPERTY RAFT RVER AREA KAMLOOPS MNNG DVSON, B.C. LATTUDE: 51'52'N LONGTUDE : 11 9'45 ' W FELD WORK PERFORMED: June 7-13,1981 ON CLAMS: RM 1,2,5,6 REPORT BY ALAN R. SCOTT MNERAL RESOURCES BRANCH ASSESSiv'iEMT REPORT NO.

2 , TABLE OF CONTENTS NTRODUCTON... 1 NDUCED POLARZATON SURVEY DSCUSSON OF RESULTS... 2 CONCLUSONS **+ 0 APPENDX - Statement APPENDX - Statement of Expenditures APPEND1 X -Certi f i cati on ATTACHMENTS Plate Location Map to 5- nduced Polarization/Apparent Resi s ti vi ty pseudosecti on Claims and Grid Map Chargeability Contour Plan Apparent Resistivity Contour Plan.!..

3 COMNCO LTD. EXPLORATON, 1 ', WESTERN D STR CT NTS: 82M/13E 25 JUNE 1981 GEOPHYSCAL REPORT ON AN NDUCED POLARZATON SURVEY RM PROPERTY NTRODUCTON During the period June 7-13,1981, a Cominco geophysical crew completed an induced polarization survey over four lines covering a portion of the Rim claims. The Rim property is located on the east side of the West Raft River canyon, some 27 km north of Vavenby, B.C. Access is via a network of logging roads along the Raft River Valley. This report describes the procedures used on the survey, presents the data, and briefly discusses the results. NDUCED POLARZATON SURVEY A Huntec M4 LOP0 induced polarization transmitter in combination with two Scintrex PR-8 receivers were used on the Rim survey. One receiver operator read the first two separations (n=l and 2) and the other the thi rd separation. Readings were taken in the time domain using a 2 second on/2 second off alternating square wave signal. The chargeability values plotted are those for the M 32 window of from milliseconds following cessation of the cgrrent pulse. Units of chargeability (P) response for the PR-8 receiver are millivolts per volt. A pole dipol e electrode array was used on the survey with an "ali spacing of 50 metres, and, ''n" separations of 1,2 and 3. The current electrode was kept to the east of the recei vi ng dipole on a1 1 survey 1 i nes. The apparent resistivity values are given in units of ohm meters and were calculated from the relation:- apparent resistivity = (V/) *K

4 2/25 June where V is the voltage across the measuring electrode pair during the current () on period and K is a geometric factor that is constant for a given 'la" and llnl'. Magnetics A Scintrex MP-2 total field proton precession magnetometer was used for the magnetics survey. Corrections for diurnal drift were made by reference to a Scintrex MBS-2 base station magnetometer. DSCUSSON OF RESULTS The - chargeability (P) and apparent resistivity results are plotted in pseudo section format on accompanying plates to 5. P anomalies have been categorized on the pseudosections in the following manner: strong P high (240 at near separation ) Pmmma moderate P high ( at near separation) --- XlV ~HHHHA weak P high ( at near separation) (720 at further separation) The n=l P and apparent resistivity results are also plotted in contourn, plan form on plates and 7 respectively. The greater than 20 7 response area is indicated by the stippled pattern on the P plan. The pseudosection format is a strictly schematic presentation, and no specific target depth or geometry can be inferred directly from it. A further cautionary note is that the resistivity results are influenced to some extent by changfs in topography. n particular, the sharp break in topography at the canyon rim would be expected to "create" an apparent resistivity high at the break. The contour plan shows,that the survey area ismgenerally characterized by above background response (greater than 10 -) on the east and low response on the west silde. A moderate to stroxg anomaly was detected from looooe to 10150E on line 10600N, and moderately high anomalies plot at 10125E on line llooon and at 9875E and line 10800N. Subject to correlation of these geophysical results to geochemistry and geology, further work (including fill in and expansion of the P grid) to determine the causative source(s) appears warranted.

5 3/25 June 1981 CONCLUSONS During the period of June 7-13,1981, four lines of multiseparation time domain P were surveyed on portions of the Rim claims. The work revealed that the east portion of the grid is underlain by units having above background chargeability response, and contains two anomalies of moderately strong response (10125E on line llooon and 9875E on line 10800N) and one anomaly of moderate to strong response (10000 to 10150E on line 10600N). Subject to a geochemical and geological assessment, further work (including fill in and extension of the P grid) to determine their causative source( s) appears to be warranted. Respectfully submitted: Alan R. Scott' Geophys i ci s t Approved for release by: V G. Harden, Manager Exploration Western District. V ARSjpm 25 June 1981 Di s t ri bu ti on : Mining Recorder (2) Western District (1 ) Geophysics File (1)

6 APPENDX N THE MASTER OF THE B.C. MNERAL ACT AND N THE MATTER OF A GEOPHYSCAL PROGRAMME CARRED OUT ON PORTONS OF THE RM MNERAL CLAMS ON THE RM PROPERTY LOCATED 27 KM NORTH OF VAVENBY,B.C. N THE KAMLOOPS MNNG DVSON OF THE PROVNCE OF BRTSH COLUMBA, MORE PARTCULARLY N.T.S.: 82 M 13 E STATEMENT, Alan R. Scott, of the City of Vancouver, in the Province of British Columbia, make oath and say:- 1. THAT am employed as a geophysicist by Cominco Ltd., and, as such, have a personal knowledge of the facts to which hereinafter depose; 2. THAT the annexed hereto and marked as "Appendix 11" to this statement is a true copy of expenditures incurred on geophysical survey on the Rim Property; 3. THAT the said expenditures were incurred for the purpose of mineral exploration of the above noted claims between the 7th day and 13th day of June, s i gned : A1 an R. --. Scottheophys i ci s t 1 25 June 1981 e ~ /

7 APPENDX 1 STATEMENT OF EXPENDTURES RM PROPERTY (nduced Polarization Survey) 0 1. Salaries. Jackisch, geophysicist, June 8-12, 5 $135 = $ T. Wong, geophysicist-in-training, June days (3 $110 = B. Price, helper, June 7-13, 7 days 8 $93.30= P. Evans, helper, June 7-13, 7 days 8 $93.30= T. Adlington, helper, June 7-13, 7 days (3 $71.43= Equipment rentals P survey system plus truck 4 man $170 = Charges per survey day (towards report, draftf ng, data processing) 4 days P survey (3 $225 = $ Miscellaneous expenses $ 3, $ $ (rooms, meals, consumables, travel j $ 1, Total expenditures $ 6, June 1981

8 APPENDX 11 C E R T F C A T O N, Alan R. Scott, of 4013 West 14th Avenue, in the City of Vancouver, in the Province of British Columbia, do hereby certify:- 1. THAT graduated from the University of British Columbia in 1970 with a B.Sc. in Geophysics; 2. THAT am a member of the Association of Professional Engineers of the Province of Saskatchewan, the Society of Exploration Geophysicists of America, and the British Columbia Geophysical Society; 3. THAT have been practising my profession for the past eleven years. Signed: &%- Alan R. Scott, Geophysicist 25 June 1981

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9 Mk.1. lrawn by: Kiiornetres 1? 5 'P NTS 'P 'RM CLAMS 82 M,, 3-. rtraced by: ierlwa 01 i~.~* R.vtud ay ;oaie 1 L O C A T O N M A P K A M L O O P S M. D., B.C. : 2 5 0,000 Date: JUNE 1981,P'at=:*09-8, -

on the COMINCO LTD. WESTERN DISTRICT EXPLORATION N.T.S. 94L/3E GEOPHYSICAL SURVEYS LATITUDE: 58' 12' N; LONGITUDE: 127' 10' W

on the COMINCO LTD. WESTERN DISTRICT EXPLORATION N.T.S. 94L/3E GEOPHYSICAL SURVEYS LATITUDE: 58' 12' N; LONGITUDE: 127' 10' W COMNCO LTD. EXPLORATON N.T.S. 94L/3E WESTERN DSTRCT GEOPHYSCAL SURVEYS on the WEST GROUP, FROG RVER PROPERTY KECHKA AREA, LARD MNNG DVSON, B.C. LATTUDE: 58' 12' N; LONGTUDE: 127' 10' W WORK PERFORMED: