geophysical survey report cantin creek property …
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GEOPHYSICAL SURVEY REPORT
on the
CANTIN CREEK PROPERTY
Deacon 2 Mineral Claim
Cariboo Mining Division
NT% 93Bi16E
B.C. Geographic System Map Sheet: 093B.099,100
Latitude: St0 55.3’ N; Longitude 122’ 11.4’ W
UTM (NAD 83): 5 863 800 N; 554 400 E; Zone 10
Owner and Operator: Cross Lake Minerals Ltd.
Authors: Jim Miller-Tait, P.Geo. Shawn Rastad. B.Sc. Syd Visser. B.Sc., P.Geo.
November 27,2003
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TABLE OF CONTENTS
I 0 /Dj
, Geophysical Report 3D Induced Polarization (IP) and Magnetic
Surveys on the Cantin Creek Property by Shawn Rastad, B.Sc. and Syd Visser, B.sc., P.Geo.
1 Surveyed by: SJ Geophysics Ltd. 1 Processed by: SJV Consultants Ltd. I
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I Plan Number Chargeability: 100 m 1 Chargeability: 150 m 1 Chargeability: 2 - - Resistivity: 25 I Resistivity: 50 I Resistivity: 75 m Belo Resistivity: 100 m Be1 Resistivity: 150 m Bel Resistivity: 200 - zn - -. .’
Title Scale 3elow Surface 1:5 950 3elow Surface 1:5 950
:UU m Below Surface I:5 950 n Below Surface I:5 950 n Below Surface 1:5 950
- Surface w 1:5 950 ow Surface 1:5 950 ow Surface 1:5 950
m Below Surface 1:5 950 1 vlsuahzatlon Snapshots: - Facing Nor&h
18 Northeast ng Southeast
#2 - Pacu #3 - Facil
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SECTION A: REPORT
INTRODUCTION:
Cross Lake Minerals Ltd. and Gold Giant Ventures Inc., each as to 50%, hold an option, by
agreement with Geoffrey Goodall dated April 11, 2003, to acquire a 100% interest in the Cantin
Creek Property (the “Property”). This report documents the geophysical survey carried out on
the Property in June and July 2003. The fieldwork consisted of the recutting of 7800 metres of
grid line up to a standard suitable for geochemical and geophysical surveys and 6.0 line
kilometres of Induced Polarization (UBC 3-D Inversion System) and Magnetic Survey. The
field geophysical survey was carried out by SJ Geophysics Ltd. and the interpretation by S.J.V.
Consultants Ltd. of Delta B.C.
PROPERTY:
The Cantin Creek Property consists of two contiguous 4 post mineral claims. Deacon 1 (20 units)
and Deacon 2 (12 units), the aggregate 32 units covering some 800 hectares, all being in the
Cariboo Mining Division. The claims were staked for the property vendor in August, 2002 and
are presently registered in the name of Cross Lake Minerals Ltd. in accordance with the terms of
the option agreement. The claims are shown on Plan Numbers CAN-03-01 to-CAN-03-03
contained herein. The details of the mineral claims that comprise the Property are set out in
Section B of this report The expiry dates shown are based on the Statement of Work tiled on
August 18. 2003 (Event #3198632) and assume that the work contained in this report will be
accepted for assessment purposes.
I~DITION 2 EDIT
Cariboo Mininy Division GENERAL LOCATION PLAN
Scale: I:250 000 NTS: 93Bil6E ,,_’ c Plan No. CAN-03-l November 2003
Y /
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CU2.l 4
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377883
379813
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I HAG 2
CROSS LAKE. MINERA& LTD. CXNTIN CREEK PROPERTY
Cariboo Mining Division MINERAL CLAIMS
Scale: 1:50 000 NTS: 93BI16E PIan No. CAN-03-3 November 2003
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/ \ LOCATION AND ACCESS:
The Cantin Creek Property is located on the Interior Plateau of central British Columbia,
approximately 2 I kilometres east-southeast of Quesnel and 7 kilometres east of the confluence of
Cantin Creek with the Quesnel River. The claims are situated on NTS map sheet 93B/16E and
B.C. Geographic System map sheets 0938.099 and 100. Geographic coordinates are 52” 55.3’
north latitude; 122’ 11.4’ west longitude and the UTM coordinates (NAD 83) are 5 863 800 N
and 554 400 E in Zone 10.
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Access to the Property from Quesnel is either via the Wells-Barkerville Highway (Route 26) for
16 kilometres east from Highway 97 to #300 Forest Service Road then southeast for 4 kilometres
to #500 Forest Service Road and then in a southerly direction for 15 kilometres to the Property or
along an alternate route by taking the Quesnel-Hydraulic Road From Highway 97 in a
southeasterly direction for 23 kilometres to Sardine Flats and the bridge crossing of the Quesnel
River at Gravelle Ferry, then east on #2700 Forest Service Road for 9.5 kilometres and then
north on #500 Forest Service Road for 11 kilometres to the Property. A number of access trails
from earlier logging are located on the Deacon 2 claim.
CLIMATE, TOPOGRAPHY AND VEGETATION:
The region has warm, dry summers and cold, medium snowfall winters. The claims overlie a
gently rising, generally southwesterly facing slope on the east side of the Quesnel River Valley.
Cantin Creek, which cuts the western portion of the Property, is fairly steeply incised. Elevations
at the Property range from 760 metres on the western edge in the Cantin Creek drainage up to
0 960 metres on the east side with the mean elevation being 900 metres above sea level. The claim
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area is covered by a thick blanket of glacial till ranging in thickness from a few metres to over
100 metres.
Vegetation consists primarily of lodgepole pine and spruce with stands of aspen, birch and
cottonwood. Timber harvesting has occurred with numerous cut blocks scattered throughout the
claims.
HISTORY:
The Cantin Creek area was first staked as the CAN I mineral claim by the Cariboo Project (Fox
Geological Consultants Ltd., Newconex Canadian Exploration and Dome Exploration) who were
exploring for gold skarn mineralization in the same setting as the QR deposit. During 1977, the
Cariboo Project conducted preliminary mapping, geochemical sampling and drilled five
percussion holes totaling 409 metres. In 1982, Dome Exploration (Canada) Ltd. staked the
Gerimi l-29 claims, totaling 548 units and covering both the Cantin stock and the Gerimi body
to the south. An extensive grid of 146 line-kilometres was established in 1982 and 1983 to
facilitate geochemical and geophysical surveys. Between 1984 and 1991 induced polarization
surveys were performed as well as some 5850 metres of diamond drilling exploring for gold
skam mineralization. Results from this drilling include a 6.0 metre section of pyritic, propylitized
basalt in hole G-25 that returned 1.72 sit gold and an Il.0 metre section in hole G-21 that
averaged 1.41 gt gold and contained dense chalcedony and quartz-carbonate veinlets.
In 1998, work carried out by Fox Geological Services Inc. for Paramount Ventures & Finance
Inc. included an extension to the grid, soil sampling, 10.5 line-kilometres of induced
polarizationiresistivity surveying and the relogging of tive diamond drill holes.
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0 REGIONAL GEOLOGY:
The Cantin Creek Property lies in the Quesnel Trough, a northwesterly trending belt of upper
Triassic to lower Jurassic Takla Group volcanic flows and sedimentary rocks. These rocks are in
thrust contact with metamorphosed rocks of the Omineca Terrane to the east and sedimentary
rocks of the Paleozoic Cache Creek Group on the west. A series of regularly spaced alkalic
stocks occur along the axis of the belt and are host to a number of copper-gold prospects.
0
The region has been the subject of numerous research, mapping and exploration projects. During
1987 and 1988, the B.C. Ministry of Energy, Mines and Petroleum Resources completed a series
of mapping programs along the central and eastern portion of the belt including work by Bailey,
Bloodgood and Panteleyev. Bailey’s work established the local stratigraphy more or less as
follows: a lower unit of upper Triassic sandstone, siltstone and minor claystone with interlayered
beds of matic tuff and breccia; a middle unit of late Triassic basaltic volcanic rocks overiain
locally by a thin, discontinuous limestone unit; and an upper sequence of felsic volcanic tuff and
breccia of lower Jurassic age. Small intrusions of gabbro-monzonite-syenite are comagmatic
with the latter unit.
PROPERTY GEOLOGY:
The claims are underlain predominantly by northwesterly trending felsic and mat% volcanic
rocks, marble and siltstone. A broad zone of polythic felsic breccia crosses the claims. Breccias
consist of compact accumulations of feldspar-rich, subangular fragments up to 10 cm in
diameter. Most of these breccias are matrix-supported and poorly sorted. This unit has been
intruded by the Cantin stock in the central portion of the property. On the west side of the claims,
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0 a massive belt of limestone outcrops sporadically below the felsic breccia unit. Maroon basalt
outcrops farther west. East of the felsic breccia unit, siltstone. marble and their hornfelsed
equivalents, which dip 60” to the southwest, underlie much of the terrain. The bedded sequence
is cut by a large lobe of felsic intrusive rock just east of the main Cantin stock. The
marble/siltstone unit, which is thought to correlate with the limestone horizon to the west, was
the key target for previous exploration. The marble/siltstone unit is bounded on the northeast by
calcareous and propylitized basalts.
SURVEY GRID:
Sabre Exploration Services of Quesnel were engaged to reestablish the survey grid on the
property over an area of 500 metres by 1200 metres. Six parallel lines (84N, 85N, 86N, 87N,
c;i 88N and 89N) on 100 metre spacings were cut along with one control tie line. A total of 7800
metres was surveyed. The location of the survey area is shown on Plan Number CAN-03-02 and
was entirely on the Deacon 2 mineral claim.
SOIL GEOCHEMICAL SURVEY:
Prior to the geophysical survey being carried out, a geochemical survey was completed on two of
the grid lines, these samples being analyzed by the Mobile Metal Ions Method (MMI-B for Au,
Co, Ni, Pd and Ag) at SGS Mineral Services in Toronto. The purpose of this sampling was to
provide a comparison with the conventional geochemical sampling that was carried out in 1998.
Line 86N was sampled from I14+00E to 126+75E while Line 87N was tested from 114+50E to
127+00E. Samples were taken on 25 metre intetvals, a total of 103 being collected. The MM1
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0 sampling outlined a precious metal soil anomaly coincident with the geophysical anomaly
detailed in this report
GEOPHYSICAL SURVEY:
SJ Geophysics Ltd. of Delta, B.C. was engaged to carry out the Induced Polarization and
Magnetic surveys on the property and the interpretation was conducted by S.J.V. Consultants
Ltd. Their report summarizing the field work and data interpretation is appended in Section D.
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CONCLUSIONS:
The Cantin Creek Property hosts geology that is prospective for epithermal-style gold
mineralization that has been intersected in drill holes, although low grade, completed by earlier
operators in an area west of the 2003 work area. The area that was surveyed by SJ Geophysics
Ltd. in 2003 using the 3-D Inversion Induced Polarization method outlined a distinctive “bulls-
eye” I.P. anomaly in the areas of Lines 86 and 87 North, in the center of the grid. The high
chargeability anomaly, indicative of the presence of sulphides, is centered slightly northeast of
the high resistivity anomaly, which is indicative of siliceous alteration. The two anomalies
correspond to a signature of an epithermal-style gold mineralization system. Also discussed in
the attached geophysical report in Section D is the distinct southwest-northeast structure cutting
the chargeability and resistivity anomalies which should be tested in the next phase of
exploration. The property should be drill tested to explore the source of the Induced Polarization
anomalies.
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0 RECOMMENDATIONS:
Diamond drilling is recommended as the next phase of work to explore the Cantin Creek
Property. A first phase program of 600 metres of NQ2 (2 inch) core drilling is suggested. The
drill targets are the coincident high chargeability with high resistivity anomalies and the structure
striking southwest-northeast crossing the two anomalies. This area is also anomalous in gold in
the soil sampling was completed and analyzed using the’Mobile Metal Ions method. Two drill
holes, 300 metres each, with an azimuth of due north and a dip of 45 to 50 degrees would test the
targets. The estimated cost would be approximately $75,000 which would cover all expenses
including contract drilling, geological supervision, core splitting, analyses, surveying, transport,
accommodation and meals. This work could be carried out at any time of the year due to the
favourable access to the Property.
Respectfully submitted*
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0 REFERENCES:
Bailey, D.G., (1989): Geology of the Central Quesnel Belt, Swift River, South-Central British
Columbia (938116, 93A/12, 93G/l); B.C. Ministry ofEnergy, Mines and Petroleum Resources,
Geological Fieldwork 1988, Paper 1989-1, pages 167 to 172.
Cameron, R.S. (1991): 1991 Project Report, Cantin Creek Property; a confidential internal
report by Fox Geological Consultants Ltd. for Phelps Dodge Corporation of Canada, Limited,
December 31, 1991
Fox, P.E. (1990): Report on the Gerimi 1-9 Mineral Claims, Cantin Creek Area; by Fox
0 Geological Consultants Ltd. for Phelps Dodge Corporation of Canada, Limited, October 10,
1990.
Fox, P.E. (November 1998): Geological, Geochemical and Geophysical Report on the Gerimi
1-7 Mineral Claims, Gerimi Creek Property, Cariboo Mining Division; by Fox Geological
Services Inc. for Paramount Ventures & Finance Inc.; NTS 93B/16E; B.C. Assessment Report
#25747
Lu, J. (1989): Geology of the Cantin Creek Area, Quesnel River (93B/16); B.C. Ministry of
Energy, Mines and Petroleum Resources, Geological Fieldwork 1988, Paper 1989-1, pages 173
to 181.
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0 MacDonald, RC. (1991): 1991 Diamond Drilling Program, Gerimi 1-7 Mineral Claims; by
Fox Geological Consultants Ltd. for Phelps Dodge Corporation of Canada, Limited, June 18,
1991; NTS 93B/16E; B.C. Assessment Report #21461
MacDonald, RC. and Fox, P.E. (1990): Drilling Report on the Gerimi 1-7 Mineral Claims;
report by Fox Geological Consultants for Placer Dome Inc., April 30, 1990; NT’S 93B/16E; B.C
Assessment Report #20125
Tipper, H.W. (1957): Geology, Quesnel, Cariboo District, British Columbia; Geological
Survey of Canada Map 12-1959
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STATEMENT OF OUALIFICATIONS: u
For: Jim Miller-Tait of 828 Whitchurch Street, North Vancouver, B.C. V7L 2A4
I graduated from the University of British Columbia with a Bachelor of Sciences Degree in Geology (1987);
I have been practicing my profession as a geologist in mineral exploration and mining continuously since 1987;
I am a fellow in good standing with the Geological Association of Canada;
I am a registered member in good standing as a Professional Geoscientist with the Association of Professional Engineers and Geoscientists of British Columbia;
The observations, conclusions and recommendations contained in the report are based on field examinations, personal sampling, and the evaluation of results of the exploration programs completed by past operators.
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u SECTION B: PROPERTY
CANTIN CREEK SCHEDULE OF MINERAL CXAIMS PROVINCE: British Columbia CLAIMS: 2 1 UNITS: 32 1 AREA: 800 ha MINING DIVISION: Cariboo NTS: 93B116E 1 BCGS: 093B.O99,100 LOCATION: 7 km east of the confluence of LATITUDE: 52O55.3’ 1 LONGITUDE: 122”11.4’
Cantin Creek and the Quesnel River and 21 km UTM: ZONE 10 1 5 863 800 N ( 554 400 E
east-southeast of Quesnel PROPERTY INTEREST: Geoffrey Goodall - 100%
MAP SHEET (1:250 000): 93B - Quesnel Cross Lake Minerals Ltd. - 0% (1:50 000): 93B/16 - Quesnel River Gold Giant Ventures Inc. - 0%
AGREEMENT SUMMARY: Option Agreement dated April 11,2003 and amended May 1 and October 1: 2003 between Geoffrey Goodall and Gold Giant Ventures Inc. and Cross Lake Minerals Ltd. whereby Cross Lake and Gold Giant may earn an aggregate 100% interest (50% each) in the Cantin Creek Proper&.
CLAIM NAME
Deacon 1 Deacon 2
TENURE UNITS RECORD DUE DATE ANNUAL RECORDED NUMBER DATE fyyjy-mm-dd) WORK HOLDER
m-mm-dd) REQUIRED 396027 20 2002-08-19 2008-O& 19 $4000.00 Cross Lake Minerals Ltd. 396028 12 2002-08-19 2008-08-19 $2400.00 Cross Lake Minerals Ltd.
32 $6400.00
[ ASSESSMENT WORK SUMMARY
Date of Work New Work Filing Filed Applied
@w-mm-dd) % % 2003-08-18 Notice to Group (2 ) 2003-08-18 21443.86 19200.00
PAC I PAC 1 Total
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SECTION C: EXPENDITURES (Cantin Creek 2003 Phase 1)
I- ltem Project Geologist: J. Miller-Tait, P.Geo., Sikanni Mine Development Ltd. Transportation: Vancouver to property, onsite and return Accommodation and Meals Grid Survey: Sabre Exploration Services Geophysical Survey: SJ Geophysics Ltd.
S.J.V. Consultants Ltd.
Project Geologist: J. Miller-Tait, P.Geo., Sikanni Mine Development Ltd. Total
Work Performed Project supervision and geological mapping Period: Jun 16-30,2003
4x4 pickup truck: Period: Jun 16-30.2003
Period: Jun 16-30,2003
Geophysical grid survey
Field Work: Mobilization / Demobilization Survey: Jun 30 - Jul3,2003 Truck rental: Jun 30 - Jul3 Room and board: Jun 30 - Jul3 Survey Interpretation: Logistics report Inversion Magnetic data plotting Interpretation and final report
Data Compilation, Analysis and Report Preparation:
Expenditure Apportionment:
4.0 days @ $374.50 $1498.00
7.8 km @ $401.07
4 days @ $2086.50 4 days @ $107.00 4 days @ $535.00
600.00 8,346.OO
428.00 2,140.OO
642.00 1,605.OO
535.00 A 573.74
$21,540.28
Work Mineral Claims Work Quantities Phase 1: Grid Survey Deacon 2 7.8 line km 3,128.35
Geophysical Survey
Total
Deacon 2 6.0 line km - Mag 3,682.39 6.0 line km - IP 14.729.54
18,411.93 %21,540.28
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u SECTION D: GEOPHYSICAL REPORT
3D Induced Polarization (IP) and Magnetic Surveys on the Cantin Creek Property by Shawn Rastad, B.Sc. and Syd Visser, B.Sc., P.Geo.
- Surveyed by: SJ Geophysics Ltd. - Processed by: S.J.V. Consultants Ltd
v
0 GEOPHYSICAL REPORT
on
31) Induced Polarization (IP) and
Magnetic Surveys for the
Cantin Creek Property
Cantin Creek Property - 52055.3’ N, 1210 11.4’ W - 93B/16E
Cariboo Mining Division BC, Canada
CROSS LAKE MINERALS LTD. Vancouver, B.C.
Canada
Surveyed by Processed by XJ Geophysics Ltd. S. J. V Consultants Ltd.
Report by: Shawn Rastad, B.Sc. Syd Visser, B.Sc., P. Geo.
Report Date: September 25, 2003
1$ r 0 Table of Contents
tl i Ll r 3
(1 0 0 0
1. Summ~ ......................................................................................................................................... 1 2. Introduction .................................................................................................................................... .I 3. Location ......................................................................................................................................... 2 4. Field Work and Instrumentation ...................................................................................................... 2 5. Geophysical Techniques ................................................................................................................ .3 5.1. IP Method .................................................................................................................................... 3 5.2. 3DIPMethod .............................................................................................................................. 4 5.3. Magnetic Survey Method.. .......................................................................................................... .5 6. Data Presentation ............................................................................................................................ . 6.1. Pseudosection Results.. ............................................................................................................... .5 6.2. Total Magnetic Field Intensity Plots ............................................................................................ .5 6.3. Inversion results. ......................................................................................................................... .6 7. Discussions of Results .................................................................................................................... 6 8. Conclusions and Recommendations ................................................................................................ 7 9. Appendix 1: Statement of Qualifications ..................................................................................... .9 10. Appendix 2: Pseudosections ........................................................................................................ 11 11. Appendix 3: Magnetic Field Intensity Plot ................................................................................... 17 12. Appendix 4: Inversion Results - Planimetric maps ...................................................................... 21 13. Appendix 5: 3D Visualization Snapshots.. .................................................................................. 34
SJ Geophysics L.td. / S. J. V. Consultants Ltd 11762 - 94th Ave., Da/ta, 8. C. Canada i tel: (604) 582-1100 fax: (664) 589-7466 e-mail: sy~sjgaophysicscom
Caotin Creek- 2003
1. Summary
Induced Polarization (3D-IP) and Magnetic surveys were performed on the Cantin Creek
property for Cross Lake Minerals Inc. during the period of June 30 to July 3, 2003 by SJ Geophysics
Limited. The underlying purpose of these geophysical surveys were to determine the expanse of the
known gold mineralization of the nearby QR property, the site of the QR mine.
IP and magnetic measurements were taken on the entire grid which consisted of 6 lines, each
lkm in length. Examination of this geophysical data showed a distinct anomaly situated in the centre of
the grid. The trends and association between the different geophysical attributes are discussed within the
scope of this report. However, for a complete interpretation this data needs to be analyzed with detailed
geological information.
2. Introduction
This report describes the ground geophysical exploration program that was undertaken during the
period of June 30 to July 3,2003 on the Cross Lake Minerals’ Cantin Creek property within the Cariboo
mining division, southeast of Quesnel, British Columbia. It was the intention of this survey to assist in
determining the expanse of the known gold mineralization of the region. This report covers the
logistical information for the work completed by the SJ Geophysics’ crew and the geophysical results
from the survey.
Two geophysical methods, 3D Induced Pohuization(IP) and magnetometer measurements were
used to evaluate the selected region of the property. The Cantin Creek grid consisted of 6 lines each of
1 km extent.
SJ Geophysics Ltd. / S. J. V. Consultants Ltd. 11762 - 94th Ave., Delta, 5. C. Canada ta/: (604) 582-1100 fax: (664) 589-7466 e-ma& [email protected]
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Cantin Creek- 2003
f 13 0
3. Location
Situated southeast of Quesnel in central British Columbia, the property is administered by the
Cariboo mining division and can be accessed from the city of Quesnel. From Quesnel, you head north
along Hwy 97 where you take a right, east, along Highway 26 that leads to Barkerville. Approximately
20 km up the road, you turn south onto a forestry service road for approximately 19km. This road is
used as a baseline for the grid which is entirely on the east side of the road. The property is at 52” 55.3’
N and 122’ 11.4’ W and can be found on NTS map sheet 93B116E.
If you follow the forestry service road for an additional 37km, you come to the QR mine site.
The Geophysical crew was stationed at the QR Gold Mine. The crew camped in tents next to the smaller
,u northern pit of the west zone which is now flooded. A small camper was also on site for the preparation
of meals. Power was sourced via a generator, and the only communication was by satellite phone.
0 4. Field Work and Instrumentation
~ ld The geophysical grid was surveyed from June 30 to July 3, 2003. The geophysical crew
Ll
consisted of 5 workers, Jan Dobrescu (geophysicist), Shawn Rastad (geophysicist), John Wilkinson
(logistics), Fernando Soriano and Travis Montgomery.
The lP data set for the grid was collected using IRIS instrumentation, a VIP 4000 transmitter
(TX) with 2 seconds on, 2 seconds off duty cycle, and an ELREC-10 receiver (Rx). The 3D survey ,
li configuration, two current lines on either side of a receiver line, was used to acquire the data.
Discussions of the geophysical methods used on these surveys are discussed in Section 5 “Geophysical
0 Techniques”.
!U
The magnetic data set was collected using a Gem Systems GSM-19 magnetometer, at 12.5 metre
intervals along the traverses. Magnetic diurnal variations were monitored using a second GSM-19
magnetometer as a base station and at the end of each survey day diurnal corrections were applied to the
field data.
SJ Geophysics Ltd. / S. J. V. Consultants Ltd. 11762 - 94th Ave., Delta, I¶. C. Canada tel: (604) 662-1100 fax: (694) 66S7466 e-ma+ [email protected]
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cantin creek- 2003
Cantin Creek, was located approximately 37 km fiorn the QR mine site. It consisted of six lines,
8400N to 89OON, extending 1OOOm on approximately an azimuth of 45 degrees (north easterly
direction). The spacing betweens lines was IOOm. The main logging road was used as a base line;
therefore, each line had a different starting point ranging from 11300E to 11600E. The total linear
kilometres of the grid was 6 km. The IP receiver measurements were recorded on lines 85OON, 8700N
and 88OON.
5. Geophysical Techniques 5.1. IP Method
The time domain IP technique energizes the ground surface with an alternating square wave
pulse via a pair of current electrodes. lP/Resistivity measurements are made on a regular grid of stations
along survey lines.
ARer the transmitter (TX) pulse has been transmitted into the ground via the current electrodes,
the IP effect is measured as a time diminishing voltage at the receiver electrodes. The JP effect is a
measure of the amount of P polarizable materials in the subsurface rock. Under ideal circumstances, IP
chargeability responses are a measure of the amount of disseminated metallic sulfides in the subsurface
rocks.
Unfortunately, there are other rock materials that give rise to IF’ effects, including some graphitic
rocks, clays and some metamorphic rocks (serpentinite for example) so, that from a geological point of
view, tP responses are almost never uniquely interpretable. Because of the non-uniqueness of
geophysical measurements it is always prudent to incorporate other data sets to assist in interpretation.
Also, from the Ip measurements the apparent (bulk) resistivity of the ground is calculated from
the input current and the measured primary voltage. With regard to precision, BVResistivity
measurements are generally considered to be repeatable within about five percent. However, they will
exceed that if field conditions change due to variable water content or variable electrode contact.
ITVResistivity measurements are influenced, to a large degree, by the rock materials nearest the
s/ Geophysics Ltd. / S. J. V. Consultants Ltd. 11762 - 94th Ave., Delta, B.C. Canada iel: (664) 582-1100 I%: (604) 669-7466 e-maik syd@sjgsophysrixcom
3
Cantin Creek- 2003
surface (or, more precisely, nearest the measuring electrodes), and the interpretation of the traditional
pseudosection presentation of IP data in the past have often been uncertain. This is because stronger
responses that are located near surface could mask a weaker one that is located at depth.
5.2. 3D IP Method Three dimensional IP surveys are designed to take advantage of the interpretational timctionality
offered by 3D inversion techniques. Unlike conventional Ip, the electrode arrays are no longer
restricted to in-line geometry. Typically, current electrodes and receiver electrodes are located on
adjacent lines. Under these conditions, multiple current locations can be applied to a single receiver
electrode array and data acquisition rates can be significantly improved over conventional surveys.
For this survey, an IRIS FLRFClO receiver was used. The receiver was placed in a stationary
position and cables for the entire line were laid out. Typically three arrays were used, one for each third of the line. Typically the dipole sets were similar to those listed below.
dipole set 1: 50,50,50,50,50,50,100,100,100,100 dipole set 2: 100,100,50,50,50,50,50,50,100,100 dipole set 3: 100,100,100,50,50,50,50,50,50,50
Dipole set 1 was used for approximately the first third of line, dipole set 2 the middle portion of
line and finally dipole set 3 for the remaining portion of the line.
The current electrodes were located on the two adjacent lines. The survey typically started at the
one end of the line and proceeded towards the other. Current electrodes were advanced along the
adjacent lines, starting at one end of the array and advanced by 50 metre increments. When the current
reached a line section start/end point, the dipole array was shifted and the next dipole set was used.
Receiver arrays were typically established on every second line (100 metres apart) thereby providing
subsurface coverage at 50 metre increments crossline with more detailed (25 metre) redundant coverage
in line.
SJ Geophysics Ltd. /S. J. V. Consultants Ltd. 11762 - 94th Ave., Delta, B.C. Canada tel: (604) 562-1100 fax: (604) 669-7466 e-mail: [email protected]
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Cantin Creek- 2003
5.3. Magnetic Survey Method
Total field magnetic intensity measurements are taken along survey traverses (normally on a
regular grid) and are used to identify metallic mineralization that is related to magnetic materials
(normally magnetite and/or pyrrhotite). Magnetic data are also used as a mapping tool to distinguish
rock types, identity faults, bedding, structure and alteration zones.
6. Data Presentation
The geophysical data from this project are displayed in three formats, as indicated below,
6.1. Pseudosection Results
The IP measurements are first viewed in a traditional Z-D pseudosection presentation format by
separating the measurements into the following quadrants for each receiver line.
- Current Line < Dipole Line & C, < P, Dipole . Current Line < Dipole Line & C, > P, Dipole . Current Line > Dipole Line & C, < P, Dipole * Current Line > Dipole Line & C, > P, Dipole
Viewing pseudosections for each quadrant provides enough information to determine whether the
data being recorded is accurate and makes geophysical sense and allows for a preliminary interpretation
to identify anomalous areas and responses. These representations were viewed both for the chargeability
and the apparent resistivity data. The pseudosections are shown in Appendix 2.
6.2. Total Magnetic Field Intensity Plots
The magnetic data is presented as false colour contour plan maps. The magnetic data was gridded
and the resulting image for the Cantin Creek grid is included in Appendix 3. The contour map for the
grid was produced at a scale of 15,000 with an appropriate colour bar.
SJ Geophysics Ltd. / 6. J. V. Consultants Ltd. 11762 - 94th Ave., Delta, B.C. Canada tel: (604) 662-1100 fax: (654) 669-7466 e-mail: [email protected]
5
cantin creek- 2003
6.3. Inversion results
Inversion model results are also presented within this document. Processing of the data through
the UBC-GIF 3-D inversion programs provides for a more detailed and reliable interpretation of the data.
The purpose of the inversion process is to convert surface IP/Resistivity measurements into a realistic 3-
D block model that shows the spatial distribution of electrical resistivity and chargeability in the ground.
Results are typically viewed in a 3-D visualization program however plan maps at selected depths and
cross-sections can also be produced.
The plan maps for both chargeability and resistivity have been created for depth surfaces 25m,
5Om, 75rn, loom, 15Om, and 200m. These are included in Appendix 4. In addition, snapshots have
been taken from a 3D visualization program and placed in Appendix 5.
7. Discussions of Results
For simplicity, snapshots of the plans Chargeability and Resistivity at 50m depths have been
inserted and the zones of interest have been marked in both illustrations below.
The most noticeable feature with this data set is the resistivity high in the central region of the
survey, Iabeled region 1 in Illustration 1A and 1B. This is associated with a relatively high chargeable
feature which is slightly offset to the northeast. The high chargeability feature does extend to the
southwest along the resistivity high. Although the chargeability high extension is weaker than the
northern high, it is still relatively high in comparison to the background levels. With depth, especially
greater than 1OOm both the resistivity and chargeability features appear to get smoothened out by the
inversion program and delineation of the separate features is difftcuh. There is no association of a
magnetic high with this anomaly.
SJ Geophysics ltd. / SJ. V. Consuttents Ltd. 11762 - 94th Ave., Delta, B.C. Canada 6 tel: (604) 662-1100 fax: (604) 58S7466 e-mail: sydb@s&eophysicacom
Cantin Creek- 2003
Illustration IB: Resivtivify @ Mm
Another feature of interest are the three smaller resistivity highs immediate to the north and
northeast of the central anomalous region. These display slightly different properties in that there is no
association of a chargeability high with these and there is a strong correspondence with high magnetic
intensity readings. With this and the change in the background levels of the magnetic readings gives the
impression that a strong contact exists between the two anomalous regions.
It should be noted that the chargeability anomalous regions referred to in this discussion are
relatively high in comparison to their surrounding material; however, they are quite low chargeability
values in general.
8. Conclusions and Recommendations
Over the period of June 30 to July 3, 2003 a SJ Geophysics’ crew collected magnetic and 3D
induced polarization data to determine the extent of the known gold mineralization of the region. The
data was gathered from a small survey region over the Cantin Creek prooerty.
The geophysical data display anomalous features near the centre of the grad. The trends and
associations between the different geophysical attributes are discussed within the scope of this report.
SJ Geophysics Ltd. / S. J. V. Consultants Ltd. 11762 94th Ave., Delta, B.C. Canada tel: (604) 582-l 100 fax: (604) 589-7466 e-mailt [email protected]
7
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0 u
However, for a detailed interpretation this data needs to be reviewed and aoalyzed with detailed
geological information
u 0
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Respectfully Submitted,
0 Shawn Rastad, BSc
u 0
u u SJ Geophysics Ltd. /S.J. W Consultants Ltd. 11762 - 94th Ave., Delta, B.C. Canada 8
0 tel: (604) 582-1100 fax: (664) 569-7466 e-mail: [email protected]
I- tl
Cantin Creek- 2003
9. Appendix 1: Statement of Qualifications
Statement of Qualification for Syd Visser
I, Syd J. Visser, of 11762 - 94th Avenue, Delta, British Columbia, hereby certify that,
1) I am a graduate from the University of British Columbia, 1981, where I obtained a B.Sc. (Hon.)
Degree in Geology and Geophysics.
2) I am a graduate from Haileybury Schoot of Mines, 1971.
3) I have been engaged in mining exploration since 1968.
4) I am a professional Geoscientist registered in British Columbia.
Syd Visser, BSc., P.Geo
GeophysicistGeologist
SJ Geophysics ltd. /S. J. V. Consultants Ltd. 11762 - 94th Ave., Delta, B.C. Canada tel: (604) 562-1100 fax: (604) 5847466 e-mail: sydb@&eophysics.com
9
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w ( I
,li Statement of Qualifications for Shawn Rastad
r ,11
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I, Shawn Rastad, of 3186 Capstan Crescent, Coquitlam, British Columbia, hereby certify that,
1) I am a graduate from the University of British Columbia, 1996, where I obtained a B.Sc. Degree
in Geophysics.
2) I have been engaged in petroleum and mining exploration since 1997.
3) I am familiar with the use and interpretation of the ground geophysical methods that are
discussed in this report
LJ
i 3 I 3
Signed by:
Shawn Rastad, BSc.
Geophysicist
SJ Geophysics Ltd. / S. J. V. Consultants Ltd. 11762 - 94th Ave., Dena, B.C. Canada IO tel: (604) 662-f 100 tix: (604) 589-7466 e-mail: sydv@s&eophysics.com
10. Appendix 2: Pseudosections
LINE 8500N Chargeability Pseudosection
Mx Chagehlity - Line 8500 N Current Line > Dipole Line : Pole-Dipole : 182 data Observed Appaent ChrrgehilitY
Mx Ckgzability Line 8xX3 N Grrent Line < Dipole Line : Pole-Dipole : 182 d&9 Ctswved ppaent Ch3~ability
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Cantin Creek- 200.3
LINE 8500N Resistivity Pseudosection
Resistivily -Line 8500 N Culent Liw > Dipole Line : Pole-Dipole : 186 data
Re&tivity -Line 8X0 N Curent Line < Diple Linz : Pole-Dtpole 185 dab
Si Geophysics Ltd. / S. J. V. Consultants Ltd. 11762 - 94th Ave., De/ta, B.C. Canada 12 tel: (604) 582-1100 fax: (604) 589-7466 e-ma;/; [email protected]
Cantin Creek- 2001
LINE 8700N Chargeability Pseudosection
Mx chageability Liw 8700 N Cment Lim > Dipole Line : Pole-Dipole : 1M dab
cbserved merit Cfwgeabili~
Mx &q&ility Line 8700 N Curent Line i Dipole Line Pole-Dipole : 177 data cIbsTv&
7.657
SJ Geophysics Ltd. IS. J. V. Consultants Ltd. 11762 - 94th Ave., De/ta, 6. C. Canada 13 tel: (604) 582-1100 fax: (604) 589-7466 e-mail: [email protected]
LINE 8700N Resistivity Pseudosection
Resistidly Line 8700 N Curmc~re < Dipole Line : Pole-Dipale : 188 data
SJ Geophysics Ltd. /S.J. V. Consultants Ltd. 11762 94th Ave., Delta, 6. C. Canada 14 tel.. (604) 582-l 100 fax: (604) 589.7466 e-mail [email protected]
LINE BOON Chargeability Pseudosection
Mx chargeability - Liw 88cu N Gwent Line > Dip& Line : Pole-Dlple : 162 data ObseFved Appaent Uwgesbilibf
SJ Geophysics Ltd. /S. J. V. Consultants Ltd. 11762 94th Ave., De/ta, B.C. Canada 15 fel: (604) 582-l 100 fax: (604) 589-7466 e-mail- [email protected]
Cmtin Creek- 2003
LINE BOON Resistivitv Pseudosection
Resistlvity Lim 8800 N Cur& Line > Dipole Line : Pole-Dipole : 166 data
Resistivity Lim 8800 N Current Line i Dipole LIE : Pole-Dipole : 170 data
SJ Geophysics Ltd. / S. J. V. Consultants Ltd. I1 762 94th Ave., Delta, B.C. Canada 16 tel: (604) 582-i 100 fax: (604) 589-7466 e-mail: [email protected]
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canijn creek- 2003
11. Appendix 3: Magnetic Field Intensity Plot
Magnetic Field Intensity Plots start on next page.
SJ Geophysics Ltd. / S. J. V. Consultants Lfd. 11762 - 94th Ave., Delta, B.C. Canada 17
ta/: (604) 662-f 100 fax: (664) 5847466 e-maiL [email protected]
5864400
5864300
-5864200
5864100
-5864000
5863900
_ 3800
-5863700
5863600
-5863500
5863400
5863300
56900 56600 66700 56600 56500
Cross Lake Minerals Ltd. Cantin Creek Grid
+ TOTAL MAGNETIC FIELD lNTENS1 FALSE COLOUR CONTOUR M
TY (n AP
Ts)
J 4w
--- ,- ~-- ~1 555300 555400 555500 555600 5551700 55&00 5551900 55Qooo 55&00
r d 0 :u 12. Appendix 4: Inversion Results - Planimetric maps
) 0 Inversion results start on next page
canin Creek- 2003
SJ Geophysics Ltd. /S. J. V. Consultants Ltd. 11762 - 94th Ave., Delta, 8. C. Canada 21 tel: (604) 562-1100 fax: (664) 5697466 e-maik [email protected]
3D IP S”&EY
3D INVERSION MODEL
False Colour Contour Map
/ _ Chargeability (ms)
25m Below Surface I
3D IP SUFiVEY
3D INVERSION MODEL
False Colour Contour Map
Chargeability (ms)
50m Belolr; Surface
/ CROSS LAKE MINERALS LTO “arco”“sr, SC caPada cantin Creek Propeny Ouesnel, Bc, Canada
I 3D IP SURVEY
3D INVERSION MODEL
False Colour Contour Map
1 Chargeability (ms)
75m Below Surface
.
I
. . .
. . * .
. ‘*. . - ,, .
I
I 3D IP SURVEY
3D INVERSION MODEL
False Colour Contour Mw
I Chargeability (ms)
1 OOm Below Surface I
‘-* I-.
3-I “-*
I “TM NORTH
cantin Creek Propny O”es”4 SC. Canada
! 3D IP SURVEY
3D INVERSION MODEL
False Colour Contour Map
I Chargeability (ms)
150m B&w Surface
. - . -IT- .
* . “”
* .
I CROSS LAKE MHERALS L “arcower, EC canada Canti” Creek Propny 0”es”el. Bc, canada
/ 3D IP SURVEY
3D INVERSION MODEL
False Colour Contour MaD
Chargeability (ms)
200m Belqw Suriace
CarIll” Creek PropIty 0”esnel. EC. Cam&
I 3D IP SURVEY
3D INVERSION MODEL
False Colour Contour Map
I RESISTIVITY Ohm-m-
25m Below Surface !
-. -.
-. . .
* .
.
I 3D IP SURVEY
3D INVERSION MODEL
False Colour Contour Map
I I
_ RESISTIVITY Ohm-m
50m Belovy Surface
I
f .
1 *
+
. .
f .
f
Cant,” Creek Properly OLJesnel. EC. Cal&a
/ 3D IP SURVEY
3D INVERSION MODEL
False Colour Contour Map
/ RESISTIVITY Ohm-m-
75m Below Surface
. * r I-. I-.
‘-. .
fJ **+ . f “-. .
.
1
.
.
q * .
.
& I /
MI, :,c . 8”
Canti” Creek PlOPrtY O”esrd. SC Canada
! 3D IP SURVEY
3D INVERSION MODEL
False Colour Contour Map
i RESISTIVIi?’ Ohm-m-..-
1 OOm Belqw Surface
I CROSS LAKE MNERALS LTD. “arNx”“er, Bc. carda cantin Creek PropIty o”esnel. SC. canada
I 3D IP SURVEY
3D INVERSION MODEL
False Colour Contour Map
1 RESISTWIN Ohm-m
150m Below Surface I
-. .
I . . . &
. . . . * . . .
. . . . . f .
I 3D IP SURVEY
3D INVERSION MODEL
False Colour Contour Map
RESISTdTY Ohm-m
200m Below Surface
13. Appendix 5: 3D Visualization Snapshots
Parameter Color
Chargeability 64 Resistivity (green) Magnetic Susceptibiity (blue) Ground surface (yellow)
Isosurface value
10 800 0.035
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Cantin Creek- 2003
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17
; 0 SECTION E: ILLUSTRATIONS
Title Scale
1:250 000
Chargea Chargea. Resistivil Resistivi Resistivil Resistivi Resistivi Resistivi m viQll:
bility: 150 m Below bility: 200 m Bplnw ty: 25 m BeI@ ty: 50 m Below surt ty: 75 m Below %rf ty: 100 m Bell ty: 150 m Below SUI ty: m Rdnw 1 . , - . - “ - . .
#l - Facil #2 - Facit #3 - Facing Southeast
I 1 .<n m-m I