*V) re c. H. D. MCLEOD, P. Eng. April 5, 1968fg H-D.M! LEOD?

Transcription

1 42AMSEei TULLY 010 o f O S r? *V) re c KEEVIL MINING GROUP LTD. TIMMINS AREA PROPERTY 310, TULLY TOWNSHIP, ONTARIO CLAIMS P85340, P , P88J85 to P88390, P88395 to P88399, P REPORT ON THE GRAVITY SURVEY. REPORT NO. 329 N.B. W.T.S. 42 A/14 h, - v.,, ^ * April 5, 1968fg H-D.M! LEOD? H. D. MCLEOD, P. Eng.

2 SUMMARY, CONCLUSION^ ft REOOMMEMDATIONS; Sixteen of the twenty-eight claims comprising Property 310 in Tully Township were covered with a gravity grid in an attempt to locate more favorable sections for drilling along conductors located by an electromagnetic survey completed in 1966 and 196?* The survey located anomalies however no correlation with any of the conductors was obtained. The anomalies are interpreted to be caused by denser formations in the underlying volcanics. No further work is recommended. ACCOMPANYING MAPS: 1. Dwg "Gravity Survey".

3 -1- IM'RODUCTIONt Keevil Mining Group Ltd. Timmins Area Property 310 consists of twenty-eight contiguous claims, numbered P85340 to P85343 inclusive, P87753 to P87758 inclusive, P88385 to P88402 inclusive in Tully Township. Of this group sixteen claims only as follows were covered by the gravity survey; P85340 S W 1/4 N 1/2 Lot 11 Concession V P87757 N E 1/4 K 1/2 Lot 10 Concession V P87758 S E 1/4 N 1/2 Lot 10 Concession V P88385 S E 1/4 W. 1/2 Lot 11 Concession V P88386 S W 1/4 N 1/2 Lot 10 Concession V P88387 N E 1/4 S.1/2 Lot 10 Concession V P88388 N W 1/4 S 1/2 Lot 10 Concession V P88389 N E 1/4 S 1/2 Lot 11 Concession V P88390 N W 1/4 S 1/2 Lot 11 Concession V P88395 S W 1/4 S 1/2 Lot 11 Concession V P88596 N W 1/4 N 1/2 Lot 11 Concession IV P S E 1/4 S 1/2 Lot 11 Concession V P88398 S W 1/4 S 1/2 Lot 10 Concession V P88399 S E 1/4 S 1/2 Lot 10 Concession V P88401 N W 1/4 N 1/2 Lot 10 Concession IV P88402 N E 1/4 N 1/2 Lot 11 Concession IV The survey was done by Geophysical Engineering and Surveys Ltd. personnel under the direct supervision of the writer and was completed during the period January 8 to March 9, The operator was R. M. Blais, Callander, Ontario,

4 -2- A limited portion of the survey was done outside the boundaries of the claims but no credits have been requested for the time involved in that part of the work. The survey was done in an attempt to locate more favorable areas for diamond drilling along the numerous arid extensive electromagnetic survey conductors located by a previous survey. LOCATION.fc ACCESS: The claims are located in t he northeast corner of Tully Township, a distance of 22 miles approximately to the northeast of Timmins, Ontario. Approximate co-ordinates are ' North, ' West. Access to the claims is by heliocopter from Timmins in the summer and pulp haul roads in the winter. DESCRIPTION O*' SIMVEY: The survey was done along a portion of the picket line grid cut for the old geophysical surveys. The lines were surveyed for elevations and a station established at each location chosen for a gravity reading. All elevations were tied in to a common level and a closed grid established. Gravity readings were then taken at each station i.e. 100-foot intervals along all the lines to be surveyed with fill-in readings at 50-foot intervals across the electro magnetic survey c onductors. Check readings on known base stations were taken at regular intervals. All readings were corrected for drift, elevation

5 and latitude, thus being reduced to a common base level. The results were plotted and contoured, (see Map No accompanying this report). The survey was done with a Worden Gravity Meter serial No. 449 with a sensitivity o±' 0.01 milligals per scale division. RESULTS 01'' SURVEY: The survey partially outlines several irregular anomalies ranging to a maximum of 3*0 milligals above base level. Kone of these show any correlation with the electro magnetic conductors and are interpreted as denser rock types in the underlying volcanics.

6 LOT f? LOT f/ LOT /O LOT 9 x N P&S343 pa P&77J4 P9430/ P9430O PS77J7 P P88386 P88392 P883SO P88369 P8838B PB P&6394 P8S39S- P8S396 P884O2 P&84OO KFZV/L M/M/NG T/AjAj/A'S 4#f#-705

7 ISA U SE* TOLLY oso KKEVIL MINING GROUP LTD. T JAM INS AREA CLAIMS P8b3li0 - U3, P8?73'3-58, P8838i;' - h02, TULLY TOWNSHIP, ONTARIO. REPORT ON THE GEOPHYSICAL SURVEYS. 5 H. D, WcLFOD l K. REPORT NO. 310 H.B. N.T.S. April 2 ky t-n y H. D. McLeod, P. ENG.

8 CONCLUSIONS A RECOKJ-IKHDATIONS Keevil Wining Group Limited, Property 310, Tully Township was staked to protect A.E.K. conductors arid was tested by ground magnetometer and electromagnetic surveys during the period August 8th, 1966 to February 28th, 196?. Eight strong conductors, two of which have direct magnetic correlation and one partial correlation, were outlined. Two were proved to have been tested by diamond, drilling in the past. The conductors are interpreted to be graphitic sediments Hying in rhyolite breccia and andesite flows. Concentrations of sulphides may be present however are not evident in the surveys. Gravity profiles across the main conductors at 600-foot or 800-foot intervals are recommended in an attempt to locate concentrations of sulphides. Any gravity anomalies correlating with conductors should be checked by fill-in lines and diamond drilling. 1. "Magnetometer Survey". 2. "Vertical Loop E. M. Survey",

9 -1- Keevil Mining Group Limited Tully Township Group No. 310 consists of twenty -eight contiguous claims, numbered P8^3l-iO to P8^3U3 inclusive, P8?'53 to P8??58 inclusive and P8838^ to P88i 0? inclusive. The claims were staked to protect airborne conductors located by a survey i".] own in Hay D96h and are presently registered in the name of Keevil Mining Group Limited, Suite 1000, 11 Adelaide Street West, Torontoy Ontarlo. The geophysical surveys were done by Geophysical Engineering ;i Surveys Limited personnel under the direct supervision of the writer. The operator for both types of work was A. McClemens, Noranda, Quebec. The work was done during the period August 8th, 1966 to February?8th, 196?. A limited portion of the survey area lies outside the boundaries of the claims however no credits have been claimed for the time involved in that portion of the work. LOCATION b ACCESS The claims are located in the northwest corner of Tully Township, a distance of?2 miles approximately to the northeast of Timmins, Ontario. Approximate co-ordinates arc i 8 0 h!? 1 North, 8l 0 10' West. Access to the claims is by heliocopter from Timmins in the summer arid by pulp haul roads in the winter. OK SURVEYS An old grid of lines oriented N. 30 G K. covering the eastern part of the claims were brushed out arid re-chained. Grids of north-south lines were cut over the western and northern parts of the group.

10 -2- Iri a]] twenty-two miles of line was established. The magnetometer survey was done with a Sharpe Fluxgate Model M. F. l Magnetometer having a sensitivity of?0 gammas per scale division. The procedure used during this survey is described in Appendix "A". Approximately 1650 readings were taken. EJfiCTmMAGNKT 1C SJJHVKY The electromagnetic survey was done with a Sharpe S. E. 200 V.E.M. Unit fitted with an amplifier and special batteries in order to increase the transmitter-receiver range to 600 feet. The procedure used during this survey is described in Appendix "B". Approximately 2L 00 readings were taken. KKSU l ^ JOFJ5UH VKYS MAGNETOMETER SURVEY The greater part of the survey area is featured by magnetic re] ief of less than 200 gammas above background. Four small anomalies were outlined. One with magnetic relief of I 00 gammas is a linear trend striking K. 500 E. in the south part of claim P8839l. A l i ne a r trend of narrow anomalies with relief of 300 gammas strikes N. 16' 0 w. to N. 300 W. across claims P88399, Po'8386 and into P853U2 and P853^3* A small oval-shaped high with relief of 1(00 gammas lies in claim P&7Y58 ana a strong anomaly with relief of 2300 gammas starts in the southwest corner of claim P87756 and extends to the northwest. KIKCTUO^AGHETIC The electromagnetic survey outlined parts of eight strong conductors, all o i' w hich extend beyond the survey area in one or both

11 -3- d iractions. Conductor l strikes cast west to N VJ. across the center part oi' claims P88396, P and p Conductor 2 strikes north-west i'rom c.laim?86i l01 through claims P68397, P8839S, P88390, P88391 and p88392 before.leaving the; claims area. Conductor 3 strikes M. 600 E. from the southwest corner oi' claim P88393 then swings to an east-west to S. 800 E. strike in claims P8839lj and P68393'. Conductor li strikes S. l6'0 E. through the southwest corner of c]aim P8^'3hO and swings to a north-south strike in claim P Conductor ^ strikes N. l GO W. through claims PB^O and Po'l)'3itl. Conductor 6 strikes east-west across claim p8ij3l-il then swings to a S. ii5 0 K. strike across claims P88386 and P8838?. Conductor 7 strikes east-west to S. l^ 0 VJ. across claim P8^'3it2. Conductor 8 strikes N. i6'd W. across the center part of claim P877i*6. All conductors have sections of good to excellent conductivity, indicating that they are very strong since the overburden is deep in the area. Two have partial magnetic correlation. ClEiJJOGY No outcrops are present on the claims. Two old drill holes were found and the log oi' one obtained. This, lying in claim p8839i) and testing conductor 3j intersected rhyolite breccias and tuff-breccias. The conductor was caused by a wide band of graphitic slates or silt-stories. The entire claims area is believed to be underlain by rhyolltic tuff-breccias and andesite flows. The conductors are believed to be graphitic sediments. The magnetic anomaly in claim P877!i'6 is interpreted to be a peridotite intrusive.

12 APPENDIX TO REPORT FIELD PROCEDURE FOR A MAGNETOMETER SURVEY The magnetometer deflection depends on the total vertical intensity and is made up of (a) A large part which does not vary with time or position on the property. (b) A small part which varies with time,called the diurnal variation. (c) A part which varies over the property, called the anomaly value. It is necessary to eliminate (a) and (b) and to measure (c). The first may be eliminated by subtracting a constant value from all the final calculated values in the survey. The second may be eliminated by measuring diurnal changes and subtracting them from the results at each station. The residual after these corrections are made is known as the anomaly value. SETTING UP BASE STATIONS To obtain a graph showing the variation of the magnetic field during a day it is necessary to establish a series of stations over the property whose value is known. These base stations should be so placed that one or another may be conveniently read at least every hour. The base line across a property is useful for a line of such stations, as are tie lines which are not more than one half mile from the base line. To set out the base stations the following procedure is suggested. 1. Read base A, then B, then C, then D and return to A. 2. Read base D, E, F, G and return to D. 3. Continue until all base stations are covered. 4. Tabulate the results as in the example below- STATION TIME READING GAMMAS DIURNAL CORRECTION CORRECTED BASE VALUE Base A O 1190 Base B Base C /4 X 35 B 9 2/4 X 35 = Base D Base A Note that base A has increased from 1190 to 1225 in 40 minutes. To bring the value back to 1190 one must subtract 35 gammas. The assumption is made that the increase has been regular hence Base B must have 1/4 X 35 subtracted and so on. A continuation of the calculation is carried out for all base stations.

13 App. 2 OBTAINING AND CALCULATING FIELD RESULTS Choice of Station Interval The distance between stations is determined by the width of the bodies which it is required to detect and by the depth of overburden. The normal station interval will usually be dictated by the fiedl supervisor or by the head office but the operator is responsible for outlining the shape of anomalies by taking intermediate stations and for generally adjusting normal procedure to suit local conditions. 1. Read a base station. 2. Read field stations for approximately one hour. 3. Read the same or another base station. 4. Record the Results as in the following table. STATION TIME READING GAMMAS DIURNAL CORRECTION CORR. VALUE ANOMALY VALUE Base A Base /66 /63 /60 /58 /18 /15 /13 /li r Note the diurnal added is sufficient to bring the corrected value of the base stations to those established previously. The diurnal has decreased from 66 at 8.00 o'clock to 11 at 9.06, a change of 55 during 21 equal time intervals. Thus station l will be increased by 66 minus 1/21X 55 which is approximately 63. Station 20 will be increased by 66 minus 20/21 X 55 which is 13 approximately. After several days work have been done an inspection of the corrected values will indicate the proper constant value to substract to reduce the majority of the values to as low a numerical value as possible. For the purpose of illustration it has been assumed that the constant value is The anomaly value is next plotted on a map of the property, and contours drawn and interpretation made.

14 APPENDIX TO REPORT THE VERTICAL LOOP E. M. METHOD Description The equipment consists of two light coils, one receiver with clinometer used in conjunction with amplifier and earphones and one transmitter with battery pack. When taking readings the plane of the transmitting coils is vertical and the plane of the receiving coil is horizontal. It is important that the transmitter coil is oriented so that the long axis is pointing at the receiver coil. When no conductor is present the receiver coil should null close to zero degrees (i.e. horizontal), either side of a conductor dip angles greater than two degrees will be measured. When recording dip angles the dip is designated either north or south with N-S picket lines and east or west with E-W picket lines. The degree of dip angle depends on the size of the conductor, the length, the depth and the type of traverse being used, (see survey procedure) It should be noted that the farther the coils are apart the greater the depth penetration of the signal. Because the signal strength decreases rapidly with distance from the coil, the separation between coils is limited to 500 or 600ft. Survey Procedure Two types of traverses are used, the parallel line method for reconnaissance, and the stationery transmitter setup for detailing the conductor. For the parallel line traverse the transmitter and receiver move together on two adjacent lines usually 400 ft. apart. Readings are taken every 100 ft. After the whole property has been covered in this way, the transmitter is setup on a cross over (see discussion below), and the receiver operator reads lines on either side of the transmitter with 50 ft. station interval. The transmitter is then set up on newly established crossover point (if any) and the receiver operator continues readings on the next line. This procedure continues until no crossovers are obtained. It is important that all crossovers found by the parallel line method be detailed. That is if a parallel line crossover is on say line 12 W. and using this for trans. setup, detail on line 8 W., and line 12 W. should be vreread so as to establish the exact position of the crossover. What is a Crossover? A crossover is the station where the dip angle is zero degrees and the dip angles on either side of this point are,such that imaginary axis perpendicular to the plane of the coil tilts will dip towards the position of zero degrees null.

15 - 2 - When obtaining a null it will be found that a perfect null will not be obtain able. That is the lowest obtainable sound of the signal will be the same for several degrees of the dip of the coil. This is the null width and should be recorded. The dip is the average of this null width. The results are recorded as in table 1. Vertical Loop Electromagnetic Survey Station Null Dip Width Transmitter on L4E, Receiver L8E O/ 00 2N 2S 0 IS 2S 6N IS 20N 16N 3N 18 N Parallel line or broadside method 3S 2S 6S 4S etc. Transmitter on L8E at 2/90S, Receiver L4E 0/00 6NO 3N 0/50S 15N ION 13N Detail method 1/OOS 35N 25N SON 1/50S 40N 34N 37N

16 * 1 X N o K^ S J \ L OT 12 PS5343 P&5342 LOT f/ W LOTfO ^w P9430/ P ~ f~~)ej "j ~7 jc~ y /""c!3 f s*jj LOT9 9 4 P&&392 ^, ycb^j^ ~ ~~ P88389 P9430O P&&3&6 P8838Q P&7737 P& ; \ P&83&3 P&8394 ^,o.,,^e P C0A/JZ /^^ j;^ P8840Z ~~ P&84OO T/Aj/ W/V5 4#*A1-70S /?#OP^# M/A//A/G C ry 3/0- /zy. t y 7u//?

17 Geopljysica] j-cn^ineering 4c Surveys Ltd., 2189 Alr.onquin Avenue, NORTii BAY, On.brio.! fo* CANADA io* Jo' CANADA io* 0) i Mr. tt. V. Scott, Mining Lands Brunch, Ontario Departmer 4 Parliament BuiT TORONTO 2, Oftt

18 -t. -. ' *, -J Duff Twp. THE TOWNSHIP OF TULLY DISTRICT OF COCHRANE PORCUPINE MINING DIVISION SCALE: l-inch * 40 CHAINS PATENTED LAND CROWN LAND SALE LEASES LOCATED LAND LEGEND LICENSE OF OCCUPATION ROADS IMPROVED ROADS RAILWAYS POWER LINES MARSH OR MUSKEG TRAIL C.S. LW* L.O. NOTES P ~ \ 1 P 400 Surface Right* Reservafion oil Lakes a nd Rivers. DATE OF ISSUE ^. \ fs7s-4. S' 87fJ \ f87*'^ f 574 ' l* L ^V^* ~ T" * ~ "~ ~~* "* * * ~^ """ ~~" ^ JUN ffabo mi. Of MINES Gowan Twp. PLAN NO.- M,607 42A14SE01S TULLY DEPARTMENT OF MINES ONTARIO V -.-A.,!v ir '

19 Duff Twp. THE TOWNSHIP OF VI TULLY DISTRICT OF COCHRANE PORCUPINE MINING DIVISION V IV Q. CD SCALE U-INCH ^ 40 CHAINS PATENTED LAND CROWN LAND SALE LEASES LOCATED LAND LEGEND LICENSE OF OCCUPATION ROADS IMPROVED ROADS RAILWAYS POWER LINES MARSH OR MUSKEG TRAIL NOTES C.S Lac, L.O. 40C Surface " ; ghts Reservation arou oil Lakes and Rivers. II ONT. DEPT. OF MINES MINING LANDS BR. THIS MAP FOR CHECKING J PURPOSES ONLY - MUST j NOT BE SOLD. j l 7 6 Gowan Twp. PLAN NO. - M.607 J.G. 42A145E TULLY eio DEPARTMENT OF MINES ONTARIO

20 LOCATION MAP M/N/NG G/^OUP L 5CALF f "-' 42A14SE TULLY S2O

21 V a l ues s hown L E G E NO -775 ITS 77* 77* 7-75 x 100 = 7 75 milligals C onfour interval C-IO mdligols ' ^ "^ ^ V. EM. Conductor ore in milligals - Instrument 1 Worden Gravity Meter Serial No. 449 Operator 1 R M. B i ais GRAVITY SURVEY PROPERTY 310 TOWNSHIP OF TULLY PROVINCE OF ONTARIO r KEEVIL MINING GROUP LTD GEOPHYSICAL ENGINEERING AND SURVEYS LTD j \ T IT q V 42A14SE* TULLY A -14 Mar 1968 '-r ^W

22 VERT/CAL LOOP Of Ti/2-L.y KEEVIL M/N/NG GXOUP LTD 8Y i N k i - r r l V, i ^ ^ V **' ' l ^ / ^o W * fvv ' 1 M l QO 'x c\ x \ L O^k\ r / f i 1 \ ' j \ V l i \ T f "r 400' 42AI4SE TULLY 240