l l 1 GEOPHYSICAL Report l ON THE GULLROCK LAKE " S2NIMSE8153 2.14156 WILLANS 010 PROJECT 440 nCJA MINING DIVISION FOR PLACER DOME INC. VOLUME l l l l l l RECEIVED i MAY 3 O 1991 MINING LANDS SECTION Submitted by: R. J. Me i kit- Ray an Expl or at i on Ltd, l l l l l
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GEOPH RPT ON THE GULLLROCK L PROJ 440 · Woc/ies intrusives ol mtitamotphiques lelsiques D Melasedimentary rocks/ Roches m6tas6dimenlaires R^l Mclavolcanic and malic * intrusive rocks/floc/ies
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Transcript
l l1
GEOPHYSICAL Report
l ON THE
GULLROCK LAKE
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S2NIMSE8153 2.14156 WILLANS 010
PROJECT 440
nCJA MINING DIVISION
FOR
PLACER DOME INC.
VOLUME l
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l RECEIVEDi MAY 3 O 1991
MINING LANDS SECTION
Submitted by: R. J. Me i kit- Ray an Expl or at i on Ltd,
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l l l INTRODUCTION
A geophys i Cd l procjram was conducted on the Gull rock Lake
l p] ope i l y local t'd in VJillia.ns Township Patricia Minincj Division,
m l a:.ti ut ci Kenoia. This procjram was conducted on a contract basis
by Kay an Kxp] o] ri t i on 'Ltd. i or Placer Dome Inc. and was carried out
l (lin j IKJ the mouth o i F'ebi uary , 1991.
The pi oy)am conducted consisted of a total field magnetic
l suivey and. a Fill (VI.,}') survey. The purpose of this program was to
j out J i ne any geophysical responses which may indicate areas
I avoiu ri.bl K' ioi bast- metal/gold deposition.
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LOCATION AND ACCESS
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T)R' tiul li od; l.ake Property if. located within VJillians
l Towns!) i p, r'citiicjii liiiiiucj Division, District of Kenora. It is
•j .-.ppi oxi mat e l y K. km east from the town at Red Lake, Ontario.
Access to tlie propel ty during the survey period was gained by
l cfoiiKj south on hwy l O b lo i: approximately 20km to South Bay on
Gnj]]ock irike. 1'rom here t lie property is accessed by snowmobile via
l J l Ot;K 11 ri K K' .
MANITOBA
8AIE D'
HUDSON
BAY
PROPERTY LOCATION
MAJOR MINrnAL DCPOSITS QlTfS PRINCIPAUX DES UlNtRAUX
H Metavolcanic. melascdimontaiy, and felsic lo intermediate inliusive incks/Hoc/it'S niGiavolcaniques. mitasddimenlaites. el intiustvcs tclsiques au* inlnrrn6diaiics
EARLY PRECAMBRIAN (ARCHEAN) IPntCAMBRieN INFtfUEUR (ARCHtfH)
IT3 Felsic Intrusive and** molarnorpliic rocks/
Woc/ies intrusives ol mtitamotphiques lelsiques
D Melasedimentary rocks/ Roches m6tas6dimenlaires
R^l Mclavolcanic and malic * intrusive rocks/floc/ies
mdtavolcaniques elintiusives maliques
fig.l
GENERAL LOCATION
LOCATION MAP
ONTARIO 1
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.•./ x HullCAMPBELL
RAYAN EXPLORATION LTD.
LOCATION MAP
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\ ',,..5,.j,,a..T]Sc. {iMWI j
L....!,,,,..!,,,.,..!,,^,,,, ,,,,,0^0,,~l. ——— i..^ *^L T , j- r nII43II4 1 II45II5V 11*4*11 1 1124*14 IIZ4*I( . H4SO** |
1 .4.— -*ik--4- —— T-~ 4 — —lli ^V 1 s i'oo'\ I I4SIIT JII4SM( 1124*11 JM14*U 1 H24*IT ^145100 1l 1 i \ i 1 i l ^ ̂ —^ ^-—U.^. -i. ~ —J— J, l—— — f ~-~ -r --TP" ' — T ^
A i i j ll 1 II4JO** 1 H4SIOI II4JI04 j 1145105.-^^
GULLROCK LAKE X*^\ L. _ ' ,, -1 .,-.l--^JjX^ \ 31^ i /^* i ^-L.l "* ***^ l ||4)|02 i II4JI03 ' II45IO(' | "^3
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Fig 3,. RAYAN EXPLORATION LTD.
0 Vj 1
*~'"" :~"' '" ll " 1 ' Proj. No. 4 40, GULL ROC K LAKE, " WILLANS TWR, ONT.
2 " tolmile CLAIM BLOCKSeol. As Shown Drown F. C. 1 D"8 No"
Dot* Jon. 1991 NISR.I.52N/4 j 4 40 "'
PERSONNEL
lThe people directly involved with the geophysical program were
l employed by Rayan Exploration Ltd. and are as follows:
Steve Anderson Timmins, Ontario
l Mike Hickey North Bay, Ontario
All work was supervised by R.J. Heikle
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lCLAIM STATUS
The status of the claims for the Gullrock Lake Property has
f not been ascertained by the author. Therefore this report will
B deal only with the geophysical results obtained in this program.
3 t will not deal with the claim status, geology or any other
j geophysical programs which may have been conducted on the property.
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GEOPHYSICAL PROGRAM
lA magnet oineter and VLF-EM survey was conducted over the entire
l property. A total of: approximately 53km of grid lines were read
m u sing a lOOm line separation and 12.5m station interval. A total
oi 4240 readings were taken. An Omni Plus Magnetometer was used to
l conduct the surveys.
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SURVEY PARAMETERSl
11 a g n e t o m e t e r Survey
l An EUA OMNI Plus Proton Precession magnetometer was used to
cany out the magnetometer survey. A compatible OMNI IV recording
l bast' station was used, to correct the data for diurnal variation.
An accuracy oi 4/- one nano-tesla was probably achieved.
The Proton Precession method involves energizing a wire coil
l immersed in a hydrocarbon fluid. This causes the protons in the
proton rich fluid to spin or precess simulating spinning magnetic
l di poles. When the current is removed the protons precess about the
direct ion of the earth's magnetic field, generating a signal in the
" same coil which is proportional to the total magnetic field
l intensity. Jn this way, the horizontal gradient of the earth's
magnetic field can be measured and plotted in plan form with values
l of equal intensity joined to form a contour map.
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This presentation is useful in correlating with other data sets to
l aid in structural inteipietati on. Individual magnetic
responses can be interpreted for dip, depth and width estimates
B after pro! i liny the. data.
U The following parameters were employed for the survey:
l n s t r u mont - t; DA Dm n i Plus
l Station Hit e j val - l?. E.
Line Interval - 100m
l Diuinal Correction Method - EDA Recording Base Station
m D ata Presentation - Plan, contoured form
- Map No. l - magnetic data 1:5000
l - Hap 2,3 - magnetic contours 1:2500
- Map 6,7 - compilation map 1:5000
l VI,r- EM Survey
M An EDA OMNI Plus VLF instrument was used to survey the entire
property. Both the In-phase (dip angle) and Quadrature values were
l recorded at 12.5m intervals.
While VLF stands for Very Low Frequency, it is for mineral
f exploration purposes a very high frequency compared to other
commonly used Electromagnetic Surveys. The commonly used
frequencies are in the order of 18-20 kilohertz. The VLF-EM
B technique employs fixed transmitter stations located at various
places around the world to facilitate navigation. Because of
l this, one has a limited choice as to what transmitter stations that
can be used, depending on distance from and azimuth to the
t r a 11 s m i 11 e r s t a t i o n .l
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For this survey, Cutler Maine (NAA) was used. It has an
operating frequency of 24.0 khz and an azimuth of approximately of
lib degrees TN from the property. Very briefly, the transmitting
station emits a concentric, circular wave pattern, expanding about
the 11 ansiui l ter dipole. Being thousands of miles away from the
transmitter, we deal with the tangent of this wave pattern which in
this case would have a direction normal to the azimuth of 110
degrees. Thus any conductors having a general EW strike direction
would be intersected by this signal which induces a signal in the
conductor which in turn opposes the primary signal from the
transmitter station. This elliptically polarizes the resultant
field enabling detection of the conductor using a receiver coil to
determine the attitude of the resultant field at various points
a long the gr id li nes.
The resultant field dips away from the conductor axis on both
sides oi the conductor producing a cross-over on the conductor
axis. For an EW conductor, a true cross-over would occur where the
field dips south and changes to a north dip as you progress from
south to north. For this survey, a +S- system is used where a (*)
dip angle means the field is dipping to the south (indicating
anomaly is to north) and a (-) dip angle means the field is dipping
to the north (indicating anomaly is to south). This is the case
only if all readings were taken facing north as per this survey.
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The quadrature! values, while not useful alone, can help
l di st i ncju i sh between bedrock conductors which generally have a
smaller out - of - phase response than overburden or short wavelength
l conductors. Also, the polarity of the quadrature is diagnostic,
m i e- p i f the polarity follows or is the same sense as the In- phase it
gives more credibility to the conductor. Reverse quadrature
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responses often indicate overburden responses.
l The iollowing parameters were employed for the survey:
l nst in men t - E LI A Omni Plus
l Ti an sin i t tei Station - Cutler Maine (USA)
- Cal l symbol NAA
g Frequency - 24.0 KHZ
Azimuth to station - approx. 110 degrees TN
' Reading Direction - All reading taken facing N20 degrees E
Station Interval - 12.5
Line Interval - 100m
l Data }'i esentat ion - Maps 4,5, ~ Plan, profiled VLB' 1:2500
- Maps 6,7, - Compilation map 1:5000
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SyRVEY RESULTS
The geophysical program conducted on the Gullrock Property was
successful in outlining a number of zones of interest. Each
conductor outlined by the VLF has been labelled and will be
discussed individually and correlated with any magnetics in the
a i ea .
7. ON E A: This is a weak VLF conductor located entirely within
Gulliock Lake. It extends from L20E to L23E, running roughly grid
east-west at 2300N. This zone remains open to the west with its
st longest response occurring on L20E. The only magnetics which may
be associated with this conductor is a weak magnetic high to the
south on L21E/222SN.
ZONE h: This is also a weak conductor striking from L20E/2125N to
L21E/2132N. This feature lies between the weak magnetic high to
the north, meet ing under Zone A and a weak low on L21E/2050N.
ZONE C: This conductor is outlined by a fairly strong response,
indicating that it extends from L19E/13N to L22E/13N. There is
ve i y little magnetics directly associated with this zone, although
it doe:; occuj along a gradual gradient between a high to the north
and low to the south. This zone EH response becomes stronger as it
leaches the shoreline to the west, and. it also remains open in that
direction. Because of this and the lack of associated magnetics,
this zone- may be a shoreline response.
ZONE D: This conductor extends from L23E/1987N to L33E/2212N,
remaining open to the east.
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ll "*"" 31 appears lo be broken and offset slightly be t w e en L26E end 2V t;
where the ?.oue enters the lake. There is very little direct
l magnetic cor r ei at i on wi th this ;^one on its land portion. There are
a nuuibei oi magnet K nighs along its southern flank, on L27E, L29K,
';,.;,r: and l.Vo.
j Tin' lake portion of this aone has a stroncj magnetic high
direct S y associated with it between L23E and L25E. Where these
l stioiig mayno x i cs end to the east is where the zone appears broken.
This may b c a n indication oi some type of cross-structure in this
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m 7.0Nt: l',: The VLI response strikes from L24E/1825N to L27E/1912N,
and possibly as iai as L2&E. It is situated between a series of
l islands which suggest that it may be in part a shoreline response.
Howevei , there is a strong magnetic high coincidental with this
l feature on L27E, and it is flanked to the south by highs on L25E
H and L2GK. Therefore this zone should not be dismissed as a
shoreline response vjithout further investigation,
l ZONt: F: Tliis is a weak conductor which extends from L25E/1V50N to
1.32K/iB7bN. As with the two previous zones, this feature appears
g slightly of l set between L27L and L28E, suggesting the possibility
oi d cross-st ructiu o running through this area.
^ This i'.one is flanked to the north by strong magnetic highs on
M L 2bE, L26K, L26 r..OK, L29E, and L31E. This feature v-jould also appear
to be a shoreline response, but due to the correlation with the
l magnetic highs along its northern flank, it should not be dismissed
as such,
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lM ^" ZONE G: This is a moderate EM response striking from L2VE/1487N to
L3bE/ 151-ON. Again this zone is broken between L27E and L31B by
l what would appeal to be previously mentioned cross- structure . This
feature tends to become stronger as it extends east. Between L3E.E
l and L36E this /-.one seems to be cut off by what would appear to be
m a second, wider ci oss- -structure running roughly north- south through
t h i s area .
l A second weaker /-.one situated on L33E/1650N may be a branch of
the main feature.
l The magnet i cs associated with this zone have moderate highs
M which parallel t li e zone to the north and south between L31E and
* I.34E.
B ZONE H: This conductor runs from L32E/13N to L39E/12N and is
moderate in strength remaining open to the east and west. The
f possibility of. a second cross- structure mentioned on Zone G way be
* the cause of an offset in this Zone between L35E and L36E.
* The only noticeable magnetics associated with this structure
l ai e spotty, moderate highs, occurring to the north and south of
this structure; in the area where it is offset.
l ZONE 3: This is a very weak conductor striking from L40E7142bE to
L44K/1 v:jt ,L , and extending off the property to the east.
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The i'e does not appear to be any sufficient magnetics
a s s o c: i a t e d w i t h this w e a k z o n e .
ZONE J: This feature is similar to Zone I, running from L45E/1E.37N
to L46E/ H.LON extending off the property to the east.
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7. ONE K: This is a moderately strong zone which extends from
l L44FVi6VL:.N to LL.3KX187!i.N. It may extend as far west as L39E/1562N,
being broken between L41E and L43E, by a possible cross- structure .
l This iedture is paralleled to the north by zone L for its entire
m s il ike length. Thei e is a magnetic high coincidental with this
zone on L49K. The majority oi magnetics associated with this zone
l aie spotting highs paralleling this feature to the north.
ZONE L: This would appear to be the main feature extending across
l the block, striking from L36E/1662N to L62E/2150N, and remaining
H open to the east. To the west it seems weaker, and is cut oft by
an apparent cross- structure , as with other zones in this area.
l This conductor tends to run more or less along the southern
flank of the main magnetic high unit that extends across the block
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at roughly, grid east-west. It is however, coincidental with some
i sol at ed magnet i c highs running from L46E! to L50E and again on L56E
an ci l, 6 O t;.
l y. ONE M: This feature extends from L43E/1912N to L45E/19N, and may
be some type of branch or extension of Zone L. It is of moderate
l strength with a coincidental magnetic high on L43E. VJhat may be
an oifset oi this zone is a conductor occurring on L42E/18E.ON .
This second feature is also coincidental with a magnetic: high, that
fl may be related to 7, on e L.
ZONE W: This conductor strikes from L37E/18N to L38E/1825N. It is
l flanked to the south on L38E by a strong magnetic low, which may be
and indication of alteration or silicification.
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lB "^ ZONE O: This zone may be an offset of zone N, as is similar in
characteii st i c. It has a coincident magnetic low and is situated on
l L36K/1862N.
7,0MB P: This zone runs from L33E/1987N to L36E/1962N. It increases
l in stiencjth to the east, where it appears to cut off. This zone has
M coincident magnetic highs on L33E and L36E.
ZONt; Q: This is a one line EM anomaly located on L32E/212N. It has
l moderate conductivity with no direct magnetic correlation.
ZONE H: This feature extends from L36E/2025N to L40E/2025N. This
l zone may be an offset or extension of zone P. It is coincident with
a magnetic high on L37E. Again, this feature may have been offset
from zone P by a cross fault?,
l X ON E S: The conductor strikes from L36E/2150N to L39E/2137N,
remaining open to the west. It is marked by a fairly strong E.M.
l response with a weak magnetic low closely flanking the zone to the
. south on L37E. The eastern portion of this zone occurs within
* magnetic highs, with a bulls-eye high situated to the north of the
l z one on 1.39K.
ZONE T: This zone extends from L36E/222E.N to L44E/2200N with the
l strike direction dipping slightly southwards in the central portion
of the zone, where its response is strongest. Magnetics associated
" with this zone included coincidental lows on L39E and L43E and
B Inglis on L40E and 1,4 IE. As well, this feature is closely flanked
by a number of magnetic highs and lows along its strike length,
l again suggesting the presence of alteration or silicification.
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ZONK L): Til i K zone strikes from L39E/2287N to L41B/2250N With its
strongest response occurring on L41E. It is flanked to the south
by magnetic lows on L39E and L40E, and by a high to the north on
1,4 ] H.
ZONE V: Tins conductor strikes from L40E/24N to L42E723bON
remaining open to the west. As v?ith the previous zone, it's
strongest response occurs to the east, where the zone appears to be
cut off, and t lie strong magnetic highs coincidental with the zone
end. These high magnetics occur on L42E and 44E, with a low
occurring between these on L41E.
A possible extension of this zone occurs along the southern
flank of the magnetic low on L41E. This is most likely related to
the main feature.
ZONE VJ: This zone strikes from L44E/1987N to L48E/21N. Its
strongest KM responses occur within the central portion of the
/.one. Although there are no magnetics coincidental with the zone,
there is a strong high to the north on L46E, and to the south on
L47E and L48E. As well, there is a moderate low situated, south of
the conductor on L4GE.
ZONE X: This EH conductor strikes from L48E/2412N to L51E/2437N,
jemaining open to the east. This feature has direct correlation
with a magnetic high running along its entire strike length.
A second one line conductor on L51E/2487N has the same
characteristics as the above mentioned zone, suggesting that these
features may be related. This zone also remains open to the east.
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lM "^ 7.0NK Y: Th i fs loo i s a one line anomaly remaining open to the east
and west. it shows a relatively strong EM response, and is
l situated to the north of e fairly strong bull's-eye magnetic high.
ZONE .7.: This feature extends from L53E/1762N to L63E/1800N, with
l t lie strike direction swinging southward in the central portion of
m t he zone. This Ell response is moderate with very little magnetic
response. One weak magnetic high is coincidental with this zone on
l L E. r..p;.
7, OHE Z''| This zone tends to run more or less parallel with, and to
l the north of the main feature extending across the block (Zone L).
. it is located f iom L53E/2087N to L60E/2225N, remaining open between
L L-4 E and Lii&K where it extends off the property. This zone is
l offset between L59E and GOE.
The magnetics along the eastern portion of this zone consist
of highs, flanking the zone to the north and lows to the south.
The western portion of this feature is flanked on both sides
by magnetic lows. These lows may be an indication of alteration or
s i l i c i l i cat i on.
ZONK Aft: This feature extends from L55E/1462N to L60E/1450N,
lemaining open to the east. There is a slight offset in this zone
between L^&E and L57E, where the western portion of the zone shifts
si ighlly northward, closely paralleling Zone J. This suggests that
those two zones may be related. There is very little magnetic
relief associated with this zone.
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ZOMB bis: This iealuie may be related to the previously mentioned
Zone AA, as it runs parallel to and south of this zone, where it is
offset in t lie west. It strikes from L54E/1462N to L57E 1475N and
as with the previous zone, it appears to have no definite magnetic
s i gnat me .
ZONE CO: This zone extends from L61E/2025N to L62E/2012N. It is
a moderate EM response with a weak magnetic high coincidental with
the zone on LG2E.
7.0NE DD: This zone runs from L60E/1912N to L61E/1925N. It has a
weak EH response with no definite magnetic signature.
y.ONF; EE: This zone is shown by a weak EM response occurring on
L60E/3 8L.ON and L62E/1850N. The zone appears to be broken between
these two lines. It has a coincidental magnetic high on L61E, and
a low on LG2E.
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CONCLUSIONS AND RECOMMENDATIONS
The surveys conducted on the Gull rock Lake Property was
m successful in outlining a number of areas of interest. Most of the
zones outlined seem to be legitimate responses, worthy of follow-up
l work.
At this time it is difficult to establish any type of priority
l for the zones outlined. This data should be correlated with any
j additional geological or geophysical information available on the
property, and a list of priority established at that time.
l Theie is a strong magnetic unit extending roughly east-west
across the middle of the property. Many of the conductors outlined
g seem to be influenced by these magnetics which may be indicating a
. rock type change. The strength of the magnetic highs within this
unit suggest the presence of Iron formation.
l Sone of the weaker zones outlined are questionable and may be
overburden to outcrop responses. However, none of the zones
l discussed should be dismissed without further testing.
A HLE11 (niax-min) survey should be considered. It would
provide additional information and possibly assist in verifying any
U r esponses which may be questionable. It would give a more accurate
determination as to anomaly strength, and possibly dip angle.
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lM ^" An induced Polarization survey should also be considered in
order to detect possible areas of disseminated sulphide, related to
l the zones outlined, which may not have been detected in this
program.
l Hetailed geological mapping and sampling programs should be
m c arried out over the entire land portion of the block. This may
help explain some of the features discussed,
l As mentioned, most of the zones outlined seen to be legitimate
responses, and some or all of the work recommended should be
l conducted in ordei to help define some of the areas of interest.
tm This additional information should be correlated with the data in
this report. If the zones are then felt to be resolved good
l enough, a drill program may be initiated at this time.
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CERTIFICATION
l, Raymond Joseph Meikle of Timmins, Ontario hereby certifyt h d t :
1. l hold a three year Technologist Diploma from the Haileybury School of Mines, Haileybury, Ontario, obtained in MayI 9 7 b .
2. l have been practising my profession since 1973 in Ontario, Quebec, Nova Scotia, New Brunswick, Newfoundland, NWT,II a nit o b a , G e r m a n y a n d C h ile.
3. l have been employed directly with Teck Corporation, MetalIgessellschaft Canada Ltd. Sabina Industries, .S. Middleton Exploration Seivices Ltd., self employed 1979-1985 (Rayan Exploration Ltd.) and currently with Rayan Exploration Ltd.
4. i have based conclusions and recommendations contained in this i C'poi t on knowledge of: the area, my previous experience and on the jesults of the field work conducted on the property during 1990.
[-. l hold no interest, directly or indirectly in this property, nor do l expect to receive any interest or considerations from Placei Dome Inc.
Dated this 10th day of Apr i l,1991 at Timmins, Ontario.
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. ± I507o 'relative to ambient field strength of last stored value
. 0.1 gamma ± 0.02 gamma 0.01 gamma± 1 gamma at 50,000 gammas at 230C ± 2 gamma over total temperature range
1,200 data blocks or sets of readings100 data blocks or sets of readings5,000 data blocks or sets of readingscustom-designed, ruggedized liquid crystal display with anoperating temperature range from -40 0 C to ± 55 0 C. Thedisplay contains six numeric digits, decimal point, batterystatus monitor, signal decay rate and signal amplitudemonitor and function descriptors.2400 baud, 8 data bits, 2 stop bits, no parity6,000 gammas per meter (field proven)A. Diagnostic testing (data and programmable memory)B. Self Test (hardware)Optimized miniature design. Magnetic cleanliness isconsistent with the specified absolute accuracy.0.5 meter sensor separation (standard), normalized togammas/meter, optional 1.0 meter sensor separationavailable. Horizontal sensors optional.Remains flexible in temperature range specified, includesstrain-relief connectorProgrammable from S seconds up to 60 minutes in 1second increments-40"C to -f 55 0 C; D-100% relative humidity; weatherproofNon-magnetic rechargeable sealed lead-acid batterycartridge or belt; rechargeable NiCad or Disposable batterycartridge or belt; or 12V DC power source option for basestation operation.2,000 to 5,000 readings, for sealed lead acid power supply,depending upon ambient temperature and rate ofreadings
2.8kg, 238 X 150 X 250mm.1.2 kg, 235 x 105 x 90mm ,1.2kg, 540 x 100 x 40mm1.8kg, 235 x 105 x 90mm1.8 kg, 540 x 100 x 40mm1.2 kg, 56mm diameter x 200mm
2.1 kg, 56mm diameter x 790mm
2.2 kg, 56mm diameter x 1300mminstrument console; sensor; 3-meter cable, aluminumsectional sensor staff, power supply, harness assembly,operations manual.Standard system plus 30 meter cableStandard system plus 0.5 meter sensor
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ED A instruments inc. 4 Thorncliffe Park Drive Toronto. Ontario Canada M4H 1H1 Telex: 06 23222 EDA TOR CaiJle: instruments Toronto (416)4257800In USAEDA instruments inc.5151 ward RoadWheat Ridge, ColoradoU.S A. 80053(303)4229112
Printed in Canada
Major Benefits of the OMNI PLUS9 Combined VLF/Magnetometer/cradiometer
System* NO Orientation Required* Three VLF Magnetic Parameters Recorded 9 Automatic Calculation of Fraser Filter* Calculation of Ellipticity* Automatic Correction of Primary Field
Variationst Measurement of VLF Electric Field
l
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SpecificationsFrequency Tuning Range,
Transmitting Stations Measured.
Recorded VLF Magnetic Parameters
tandard Memory Capacity
lrIfcisplay
l
. 15 to 30 kHz, with bandwidth of 150 Hz; tuning range accommodates new Puerto Rico station at 28.5 kHz
. up to 3 stations can be automatically measured at any given grid location within frequency tuning range
.Total field strength, total dip, vertical quadrature (or alternately, horizontal amplitude)
. 800 combined VLF magnetic and VLF electric measurements as well as gradiometer and magnetometer readings
. Custom designed, ruggedized liquid crystal display with built-in heater and an operating temperature range from -400Cto *55 0 C. The display contains six numeric digits, decimal point, battery status monitor, signal strength status monitor and function descriptors.
(S232C serial I/O interface ...... 2400 baud rate, 8 data bits, 2 stop bits, no parity
est Mode .,.................. A. Diagnostic Testing (data and programmablememory)
Power supply ................. Non-magnetic rechargeable sealed lead-acid 18V
I DC battery cartridge or belt; 18V DC disposable battery belt; 12V DC external power source for base station operation only.
r eights and Dimensions instrument console .......... 2.8 kg, 128 x 150 x 250 mmSensor Head................. 2.1 kg, 130 dia. x 130 mmVLF Electronics Module....... .1.1 kg, 40x150x250 mm
m Lead Acid Battery Cartridge ... 1.8 kg, 235 x 105 x 90 mm l Lead Acid Battery Belt ....... .1.8 kg, 540 x 100 x 40 mm
Disposable Battery Belt ....... 1.2 kg, 540 x 100 x 40 mm
± 2 gamma over total temperature range Standard Memory Capacity
Total Field or Gradient . ...... .1,200 data blocks or sets of readingsTie-Line Points ............. .100 data blocks or sets of readingsBase Station .,. . 5,000 data blocks or sets of readings
Display . , ...... .Custom-designed, ruggedized liquid crystal display with anoperating temperature range from ~40"C to + 55 0C. The display contains six numeric digits, decimal point, battery status monitor, signal decay rate and signal amplitude monitor and function descriptors. 2400 baud, 8 data bits, 2 stop bits, no parity
. .. . 6,000 gammas per meter (field proven)A. Diagnostic testing (data and programmable memory) B. Self Test (hardware)
., . .optimized miniature design. Magnetic cleanliness isconsistent with the specified absolute accuracy.
...... 0.5 meter sensor separation (standard), normalized togammas/meter. Optional 1.0 meter sensor separation available. Horizontal sensors optional.
.. . Remains flexible in temperature range specified, includesstrain-relief connector
.... . Programmable from 5 seconds up to 60 minutes In 1second increments
cartridge or belt; rechargeable NiCad or Disposable battery cartridge or belt; or 12V DC power source option for base station operation,
iattery Cartridge/Belt Life .. . . 2,000 to 5,000 readings, f or sealed lead acid power supply,depending upon ambient temperature and rate of readings
eights and Dimensions instrument console Only ........ 2.8 kg, 238 x 150 x 250mmNiCad or Alkaline Battery Cartridge ....... 1.2 kg, 235 x 105 x 90mmNiCad or Alkaline Battery Belt............ 1.2 kg, 540 x 100 x 40mmLead-Add Battery Cartridge ...........,. 1.8 kg, 235 x 105 x 90mmLead-Acid Battery Belt. . ............ 1.8 kg, 540 x 100 x 40mmSensor .. . . ............... 1.2 kg, 56mm diameter x 200mmGradient Sensor (O.Smseparation-standard) ........... .2.1 kg, 56mm diameter x 790mm
Gradient Sensor— d.O m separation-optional).. ......... .2.2 kg, 56mm diameter x 1300mm•andard System Complement . . ....... instrument console; sensor; 3-meter cable, aluminumM sectional sensor staff, power supply, harness assembly,
operations manual.—Base Station Option . . . .... . Standard system plus 30 meter cable•Gradiometer Option . . . ..... . .Standard system plus 0.5 meter sensor
i RS 232 Serial l/O interface l Gradient Tolerance 'Test Mode
[Sensor
Gradient Sensors
Sensor Cable
Cycling Time (Base Station Mode)
lEDA instruments inc. 4 Thorncliffe Park Drive Toronto. Ontario CanadaM4H 1H1 Telex: 06 23222 EDA TOR Cable: Instruments Toronto (4161 425 7800In U.S.A.EDA instruments inc.S!51 Ward RoadWheat Ridge. ColoradoU S.A 80033(3031422 9112
Printed In canada
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CAD
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Qeological-Geochemical :a Statement
58N84SEei53 2 , H 156 W ILLANS 900
TO BE ATTACHED AS AN APPENDIX TO TECHNICAL REPORTFACTS SHOWN HERE NEED NOT BE REPEATED IN REPORT
TECHNICAL REPORT MUST CONTAIN INTERPRETATION, CONCLUSIONS ETC.
Type of Survey(s) GROUND MAGNETOMETER S VLF
Township or Area WILLANS TOWNSHIP
Claim HnlHer(s) PLACER DOME INC.
Survey Company RAYAN EXPLORATION LTD.
Author of Report RAY MEIKLE
Address of Author 676 MURRAY STREET.TIMMINS.ONTARIO
Covering Dates of Survey FEBRUARY 15-28. 1991_________(linecutting to office)
Total Miles of Line Cut APPROXIMATELY 53 KM
SPECIAL PROVISIONSCREDITS REQUESTED
ENTER 40 days (includes line cutting) for first survey.
ENTER 20 days for each additional survey using same grid.
Geophysical
-Electromagnetic-— M^gnptnmeter..,. ,
— Radiomftrif-Hth^r
Cenlngiral
npnrhpmiral
DAYS per claim
20
40
AIRBORNE CREDITS (Special provision credits do not apply to airborne surveys)
Magnetometer. .Electromagnetic. . Radiometric(enter days per claim)
of Report or Agent
Res. Geol.. .Qualifications.
Previous Surveys File No. Type Date Claim Holder
MINING CLAIMS TRAVERSED List numerically
(prefix) (number)
SEE ATTACHED CLAIM
SCHEDULE
TOTAL CLAIMS. 32
GEOPHYSICAL TECHNICAL DATA
GROUND SURVEYS — If more than one survey, specify data for each type of survey
Number of Stations..1240_____________________Number of RfaHing*MAG; 4240,VLF; 4240
Station interval 12*5 METRES________________Line sparing 100 METRES____________
Profile *™le V.L.F. - l CM ^ 101_____________________________________________
Instrument EDA OMNI PLUS PROTON PRECESSION_______________________________
H Accuracy — Scale constant. ^ nT—-———————-——-———————---—-——————-—-—.—-^——.^———Z Diurnal correction method AUTOMATIC CORRECTION BY DEDICATED BASE STATION MAG.
l Base Station check-in interval (h™.™) BASE STATION MAG. CYCLE; 20 SEC._______________
Base Station location and value L-3300E. 2000N; 60636 nT________________________
UCoil configuration . VERTICAL
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Instrument EDA OMNI PLUS
Coil separation NOT APPLICABLE____________________________________________
Accuracy _______LI——————————————————————————————————————————————————————— Method: 83Fixed transmitter D Shoot back D In line D Parallel line
Energy windows (levels)—.———-.——-^——--^——..—-..———.——.—....———.^———Height of instrument-————-—-——..—---—^—-—^—-————.—.Background Count.Size of detector-——-——————————————^——^——.———.——..————-—.—.—.
Overburden ———-—^—————————..—^—.—-—-.^——.—————.———..——..———(type, depth — include outcrop map)
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