SUMMARY OF EXPL ACTIVITIES BLUE MOUNTAIN PROP … · 2017-01-17 · Detailed IP surveys as...
Transcript of SUMMARY OF EXPL ACTIVITIES BLUE MOUNTAIN PROP … · 2017-01-17 · Detailed IP surveys as...
42A68SEeise 2.115/8 BERNHARDT 010
BHP - UTAH MINES LTD.
BLUE MOUNTAIN PROPERTY
Bernhardt fi Maisonville Townships
Larder Lake Mining Division
RECEIVED
. SEP " 6 1988Sunroary of Exploration Activities
MINING LANDS SECTIONSummer 1988
BY: S.O. Weidner
DATE: August/ 1988
42A08SE0l50 2.11578 BERNHARDT 010C
TABLE OP CONTENTS
PAGE
I. ABSTRACT l
II. DISCUSSION AND RECOMMENDATIONS 2-8
III. INTRODUCTION 9-14
a) Location and Access 9b) Topography and Vegetation 9c) Exploration Program Outline 14
IV. PREVIOUS WORK 15 - 16
V. GEOLOGY 17 - 27
a) Area Geology 17b) Property Geology 18c) Structure 22d) Alteration 23e) Mineralization 25f) Description of Showings 25
VI. GEOCHEMISTRY - SUMMARY 28 - 29
VII. GEOPHYSICS - SUMMARY 30
VIII. APPENDIXES
i) Geology Maps ii) Compilation (Gp) map
I. ABSTRACT
The Blue Mountain Property consists of forty-eight (48) contiguous
unpatented mining claims within NTS 42 A/8 in the Townships of
Maisonville and Bernhardt/ Larder Lake Mining Division. Previous exploration programs have indicated results of 0.16 oz/ton Au over 4.5 m
(15 feet)/ 0.24 oz/ton Au over 0.19 m/ 0.30 oz/ton Au over 1.3 m and 0.145 oz/ton Au over 1.8 m.
The geology of the property is dominated by massive and foliated mafic
flows and mafic pillow lavas with subordinate amounts of intermediate flows and interflow sediments. All rocks on the property are Archean in
age and belong to the Kinojevis Group of volcanic rocks. These have
been intruded by stocks and sills of diorites/ possibly gabbro and syenites. Diabase dikes cut all of the above.
The rock units trend 110O - 140O and are vertically dipping. An
anticline is located in the southern 1/3 of the property. Local/
isolated shearing is common. A major strike-slip fault traverses the
property near the eastern claims in a north-south direction.
Geophysics and geological mapping have outlined an Archean vein-shear
type environment on the property over a 2000 m strike length terminated
on either side by possible faulting. A geochemical survey utilizing the
A humus layer and the Bj^ soil horizon did not give conclusive
indicators.
Recommendations for continued exploration include drill testing an I-P anomaly with a strike length of 2000 meters and" connecting the Kinika
and Jumbo Shafts. Four (4) diamond drill holes with a total meterage of
600 meters (1968 feet) are suggested as a first pass over the target
with possible follow up of weak anomalies along the same trend.
II. DISCUSSION AND RECOMMENDATIONS
The aquisition of the Blue Mountain property by BHP-UTAH Mines Ltd. was
based on several factors. Not necessarily in order of importance these
are:
1. The property is in a favorable location in respect to the magnetic
domains and structural interpretations study as per data compilation
and interpretation by Mr. V. Palma (BHP-UTAH Mines Ltd. Geologist).
This property was viewed as one of several "Field Tests" for the
"Archean Terrane Study"/ an internal BHP-UTAH Mines Ltd. research
project.
2. Two shafts with reported highly anomalous gold values are located on
the property.
3. Aeromagnetic interpretation delineates a structure connecting the
two shafts over a length of 2000 meters.
4. Previous magnetic and EN surveys by earlier exploration companies
support the theory of "Structural Connection" of the shafts.
5. Grab samples from the Kinika Shaft dump pile/ the Jumbo Shaft dump
and area/ isolated grab samples and chips from the Toast showing
(between the shafts) gave anomalous gold assays.
From the above criteria and the results of the ground geophysical
surveys (especially IP) the target of high priority is the area between
the shafts and the shaft areas themselves. Comparison and correlation
between the geology and compilation maps attached in the back cover lead
to the following observations and conclusions.
Anomaly A, and A2 (main anomaly between shafts) connects the Kinika
Shaft and the Jumbo Shaft. Just to the grid east of the Kinika Shaft
the main anomaly splits into two arms/ one continuing nothwesterly
approximately 50 m grid south of the shaft. The other arm is located
approximately 100 m grid north of the shaft. The exact reason for this
is not seen in the outcrop exposure/ but a small fault has been
suggested.
The IP anomaly continues grid east with a coincident VLF anomaly until
it splits again at approximately L119E with one arm trending grid
northeast towards and just north of the Jumbo showing/ the other arm
trending grid southeast. The split in this occasion may be a splay or a
result of the intrusion of a north-south trending diabase located at
L119+50E/31+OON.
The coincident VLF anomaly suggests that the IP anomaly and the
structure connecting the shaft areas may be a shear and/or fault zone.
For comparison note that other VLF anomalies on the property are
coincident with valleys as indicated on the geology map. Although these
may now be infilled with conductive overburden/ they may represent
buried shear zones.
Evidence in outcrop of a shear zone through which metal bearing fluids
have passed may be found in the presence of the mapped intermediate
volcanic flows. These .are located just on the edge of the IP anomaly
north (grid) of the Kinika Shaft and grid north of the Jumbo Shaft. As
indicated in the geology section above/ these rocks are likely
moderately altered mafic flows thus hinting at a shear zone with
alteration along its boundaries.
Evidence of fluids passing through the shearing may be found in the
Knoll vein and the Toast showing where quartz veins are located within
the main and subordinate shears. Although the IP anomaly does not pass
through the showings/ anomalous samples have been taken and indicate
that auriferous fluids have passed through the area.
The heat source and therefore the "Driving Engine" is most likely the
Winnie Lake Stock and its associated sills and dikes. Outcrops of
syenite on L123E/29+75N and L124+40E/29+75E have moderately to strongly
carbonatized/ as seen by numerous veinlets/ the surrounding rocks.
Locally silicification has also been noted. The alteration is very
similar to the alteration in the Jumbo showing.
Although gold is reported to be in its free state in the Kinika Shaft
and found within the quartz vein* the grab sample from the Kinika dump
pile and the chip sample results from the Jumbo shaft area indicate that
gold is present in areas of sulfidization and likely tied up with the
sulfides.
To test the IP anomalies as well as the mineralization potential in the
Kinika Shaft and Jumbo Shaft/ trenching was originally considered. From
numerous trenches and pits on the property/ all not successful in
uncovering outcrop/ it is not recommended to perform any trenching
and/or blasting. The overburden thickness as well as potential access
problems for a backhoe machine are considered to render this operation
futile.
Detailed IP surveys as recommended by Mr. P. Diorio may be considered to
improve resolution of the IP results and determine overburden thickness
prior to diamond drilling. The locations for the following recommended
drill holes should therefore be reviewed with Mr. P. Diorio/ especially
to locate the axis of the anomalies.
Diamond Drilling is by this author considered the next and most logical
step. The following holes are recommended:
BM-88-01 (See Figure 6)
Collar Location: L99+50E/30+25N
Azimuth: N 20OE
Inclination: -45
Estimated Depth: 125 m (410 1 )
Target: Moderate IP-anomaly centered at 3CH-75N
on L99+50E
BM-88-02 (See Figure 6)
Collar Location: L99+50E/30+65N
Azimuth: N20OE
Inclination: -45
Estimated Depth: 200 m (650')
Target: VLF anomaly centered at 32+15N and weak IPcentered at 33+25N on L99+50E
BM-88-02 (See Figure 7)
Collar Location: L111E/29+30N
Azimuth: N 20OE
Inclination: -45
Estimated Depth: 150 m (492 1 )
Target: Strong IP-anomaly centered at 29+80N on lineHIE
BM-88-04 (See Figure 8)
Collar Location: L121+40E/30+15N
Azimuth: N 20O E
Inclination: -45
Estimated Depth: 125 m (410')
Target: Silicified trench C-l with anomalousmineralization at 30+35N. and strong IP anomaly centered at 30+75N on L121+40N.
These four (4) diamond drill holes are considered to be of a high priority. The total meterage is 600 meters. Consultation with geophysics may decrease the "Step-Back" distance as well as recommend to additionally drill test some of the weaker anomalies which form part of the IP anomaly connecting the two shafts. Examples of these may be located on L108E/29+75N and L117+50E/29+50N.
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III. INTRODUCTION
a) LOCATION S ACCESS
The Blue Mountain Property consists of forty-eight (48) contiguous unpatented mining claims located within NTS 42 A/8. The claim group is situated in the northeastern corner of Maisonville Township and the northeastern corner of Bernhardt Township/ both Townships belonging to the Larder Lake Mining Division (See Figure 2 S 3).
The property lies 16 air Km northwest of the Town of Kirkland Lake and 91 air Km east/southeast of the City of Timmins. Access to the property may be gained via truck road on Highway li/ 22 Km north of Kenogami Lake to the turn-off to Bourkes located on the Ontario Northland Railway. From the Bourkes Community Center a gravel/bush coad leads directly to the claim block (See Figures l fi 2). The road can only be travelled by all terrain vehicle (summer) or snowmobile (winter). The distance to the beginning of the property is approximately five (5) Km. An additional two (2) Km of bush road follows the baseline and leads to the Kinika Shaft and the Jumbo Shaft/ passing closely by the Knoll Vein and the Toast Showing.
The baseline is 4.7 km long and trends 110O through the central part of the property. Section lines are established every 100 m/ trend 20O and in most cases reach the outside perimeter of the claim block. Five (5) tielines have been established. Co-ordinates of the cut grid are limited to north and east directions with the lowest number (L91E/BL30+OON) being located on the western claim boundary (see figure 3).
b) TOPOGRAPHY AND VEGETATION
The topography varies from low lying swampy areas to numerous outcrop ridges and cliff faces associated with Blue Mountain (elevation 457 m above sea level) in the south-central part of the property.
The dominant vegetation noted are mixed forests comprised of poplar/
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birch/ maple/ spruce and balsam with subordinate amounts of pine. These forests are located predominantly in areas of outcrop and in the talus slopes of Blue Mountain and other outcrop ridges/ mainly in the eastern half of the property as well as the southwestern sector of the grid.
Swampy areas are located in the central part of the property/ the northwestern and northeastern sector. These areas are dominated by alder and cedar swamps with subordinate amounts of spruce and tamarack.
Lakes and rivers are absent on the property. Rare creeks and springs were located. Three beaver dams and beaver ponds were found.
Outcrop exposure is approximately 25% on the property. The majority being located in the east/northeast sector near the Jumbo Shaft and in the northwest sector near and north of the Kinika Shaft. In the southern area Blue Mountain dominates. Numerous boulder trains were noted/ especially in the vicinity of the mountain/ likely representing a large erosional talus slope.
Overburden in areas of no outcrop appears extensive in places. Till and sandy gravel tails dominate (See Figure 4).
c) EXPLORATION PROGRAM OUTLINE
After acquisition of the property BHP-UTAH Mines completed and recut pre-existing lines and cut a new grid in the fall of 1987. During the winter of 1987/88 a geophysical program consisting of magnetometer/ VLF-EM and induced polarization was completed (seperate cover).
A geochemical survey was undertaken in selected areas of the property in the spring and early summer 1988. The survey was limited to collection of humus (A horizon) and soil (B, horizon) as descriped in a later section.
Geologic mapping and sampling completed the summers work in 1988. Follow-up stripping and trenching may be undertaken in the fall with diamond drilling to follow in late fall or early winter.
IV. PREVIOUS WORK
The property was submitted to BHP-UTAH Nines Ltd. by Goldstreet
Resources Ltd. in May 1987 and subsequently examined in the field on
June 15, 1987 by Mr. G. Holland and Mr. V. Palroa. The property was
recommended for acquisition shortly thereafter (internal report/ June
15 t 1987 and June 21, 1987).
The Blue Mountain Property has seen active exploration activities
beginning in the late 1910's up to the present. The following is a
short summary:
First mention of the area is in a report by A.G. Burrows and P.E.
Hopkins in 1914 entitled Maisonville/ Grenfell and Eby Townships. The
same authors covered Bernhardt Township in 1916 entitled Goodfish Lake
Gold Area.
Mapping in recent times was undertaken in Bernhardt Township for the
Department of Mines in 1967 by R.J. Rupert and H.L. Lovell and published
in OFR 5022 and a final report (84) released in 1970.. Maisonville
Township was mapped in 1965/66 by H.L. Lovell with a release of OFR 5036
in 1969 and final report (92) released in 1971. Data series maps
available are P-893 (Bernhardt) and P-876 (Maisonville). In 1979,
airborne electromagnetic and magnetic surveys were published by the
Ontario Geological survey for Maisonville and Bernhardt Townships.
Exploration activity is first mentioned in 1920. ONTARIO GOLD VEINS
LIMITED sank two shafts on the property. The Kinika Shaft was sunk to a
depth of 16 meters with 13 meters of drifting at the 15 meter level.
The Jumbo Shaft (Cabin Shaft) reached a depth of 15 meters with no
reported drifting. No records of geology and assay data have been
located.
KINIKA MINES LIMITED re-opened the Kinika Shaft and performed mapping
and rock sampling programs in 1937. A report states that the shaft was
sunk onto altered basalts and sampling produced results of 15 feet
averaging Q.16 oz./ton Au with a l oz cut.
In 1974 CONSOLIDATED BEAUMONT RESOURCES completed a magnetic survey over
the area with an eight (8) hole diamond drill program follow-up in the
Kinika Shaft area. Total meterage drilled was 872 meters. Drill assay
results included 0.24 oz/ton Au over 0.9 m/ 0.30 oz/ton Au over 1.3 m
and 0.145 oz/ton Au over 1.8 m.
CEDAR RIDGE EXPLORATIONS LTD. carried out magnetic and VLF-EM on a grid
with 200 feet line spacing. Several anomalies and anomaly trends were
located. Geophysical surveys were followed up with limited stripping
and trenching. One zone consisting of a quartz vein and associated
quartz stock work within a siliceous breccia was located.
Mineralization consists of pyrite and chalcopyrite with assay values
ranging from nil to .005 oz/ton Au. The program was unsatisfactory due
to thickness of overburden.
During 1985/86 PREMIER EXPLORATION INCORPORATED completed a
reconnaissance proton magnetometer survey which covered parts of the
present property outline. The program was followed up with stripping
and trenching as well as mapping and sampling.
A basal till sampling program was to evaluate the area between the
Kinika Shaft and the Jumbo Shaft as well as to check several VLF-EM anomalies. Although anomalous values were encountered the program
failed to identify known gold mineralization and the data is therefor
somewhat inconclusive.
A report by Carl Forbes reports on 66 samples being taken in the
stripped areas with assay values ranging from nil to 0.19 oz/ton Au.
BHP-UTAH MINES LTD. has since acquired the property and is re-examining
the economic potential for gold.
V. GEOLCX3Y
a) AREA GEOLOGY
The geology of Bernhardt Township is described in Geologic Report # 84 ,
Ontario Department of Mines/ R.J. Rupert and H.L. Lovell/ 1970.
All bedrock in the area is described as Archean in age with the oldest rock being described as mafic metavolcanics followed by more felsic
metavolcanics. These units are intruded by mafic igneous rocks and subsequently by granitic stocks with related dikes and sills. Diabase dikes belonging to the Matachewan Dike Swarm intrude all of the above.
The northwestern/ central and southeastern part of Bernhardt Township are underlain by intercalated basaltic and andesitic flows belonging to the KINOJEVIS GROUP of rocks. These consist mainly of alternating layers of Fe-rich and Mg-rich tholeiitic basalts. Minor amounts of tholeiitic andesite/ dacite and rhyolite occur in the southeastern part of the township.
The metavolcanics are intruded in the northern part of the township by mafic and ultramafic intrusive rocks composed mainly of diorite and gabbro with rare peridotite.
The Winnie Lake Stock occupies the southwestern part of the township and
is composed of granite with dikes and sills emanating from the stock into the surrounding metavolcanic package. These dikes and sills are generally composed of syenite/ trending towards the granitic spectrum towards the center of the stock.
All of the above are intruded by dikes of the Matachewan diabase dike swarm.
The metavolcanics trend roughly 110* - i30o m haye in ^ ^ a
vertical dip. Pillowed volcanics indicate several synclinal structurestrending approximately northwest. Several folds/ with differentlytrending fold axes/ are reported to be a result of the Winnie Lake Stock
intrusion and thus occurring in a radial pattern around the contact areas of the stock.
Major fault structures appear to trend north/south and may represent the
locals of the Matachewan diabase dikes.
b) PROPERTY GEOLOGY
The property is stratigraphically located near the top of the KINOJEVIS
GROUP of rocks consisting of alternating units of Mg-rich and Fe-rich
tholeiitic basalts. Minor tholeiitic andesites/ dacite and rhyolite occur within this formation. The KINOJEVIS GROUP is conformably to
unconformably overlain by the BLAKE RIVER GROUP of calc-alkalic basalt/
andesite, dacite and rhyolite flows and pyroclastic rocks.
i) Mafic Volcanic Rocks
The majority of the outcrops located are mafic volcanic flows/ massive
and pillowed with subordinate amounts of foliated and sheared flows.
Brecciated flows and flow top breccia were noted in minor amounts/
especially near the Jumbo Shaft and north of the Kinika Shaft area. The
mafic volcanic package in several cases contains interflow sediments of
an argillaceous to slaty nature and consist of oxide iron formation.
The massive flows display a medium brown/green to tan weathering
surface. The weathering surface is in all cases rough and often appears
brittle. The fresh surface is medium to dark green to black. Grain
size is variable from fine grained varieties to coarse grained sections. The gradational change from fine grained to 'coarse grained varieties
gives rise to the possibility that some outcrops mapped as coarse
grained flows may in fact be an intrusive phase/ ie. gabbro. Most
likely they represent the interior parts of a large flow. The majority
of these rocks are magnetic to various degrees from very weak to strong
thereby displaying Kinojevis Group affinities.
Pillowed mafic flows are present in quantity roughly equal to the
massive flows. The pillows show a smooth weathering surface of a
brownish to dark green colour. The fresh surface is in all cases dark
green to black. Top determinations were only possible in a few outcrops
due to moderate foliation intensities in the remaining exposures.
Pillows are overall moderately stretched displaying an elliptical shape.
In most cases these pillows display well defined selvages and in
isolated cases show amygdaloidal flow tops. These amygdules are
composed of quartz/calcite with calcite being the major component. They
are typically subrounded and do not exceed three (3) millimeters in
size.
Mafic breccia and flow top breccia are present in minor to rare amounts.
Occurrences noted are limited to the Kinika Shaft area and the Jumbo
Shaft area. The weathered surface is medium brown green with occasional
greyish overtones. The fresh surface is medium green. Pore spaces
resulting from brecciation have been filled by quartz/carbonate rich
fluids generally cross cutting the overall trend (See Jumbo showing).
Interflow sediments are included in the section of mafic volcanic rocks
as they are intimately associated with them if not directly derived from
them. The majority of these units have been noted in the northeastern
sector of the claim block.
The sediments consist mainly of weakly folded/ argillaceous and
occasionally slaty texture units which due to their magnetite content
may be termed oxide iron formation. Individual units are not exceeding
two (2) meters in width and in most cases are less than 50 cm in width.
Due to differential weathering they typically protrude from their mafic
host rocks and show a distinctive brittle nature.
The interflow sediments are typically dark grey to black on weathered
surface and black on fresh surface. Aphanitic grain sizes dominate.
Bedding is conformable to local stratigraphy.
ii) Intermediate Volcanic Flows
Intermediate volcanic flows are limited in extent and are located in the
northeastern sector of the claim block. Small intercalated units are
-30-
also found grid-north and grid-east of the Kinika Shaft as well as
grid-north of the Jumbo Shaft. The rocks are andesitic to dacitic in
composition and occur as massive to weakly foliated intermediate flows.
The weathering surface of these units is light to medium green and a
medium to dark green fresh surface. As with the mafic volcanic flows
the weathering surface is rough and somewhat brittler possibly as a
result of a higher silica content.
Some outcrops mapped as intermediate flows may in fact be weakly to
moderately silicified/carbonatized mafic volcanic flows (See discussion
and recommendations).
iii) Intermediate To Mafic Intrusive Rocks
These intrusive rocks are very limited in extent and outcrop exposures.
Several larger boulders of diorite/ gabbro and feldspar porphyry were
located on the property.
It should be noted at this point that due to the very variable grain
size of the mafic volcanic package/ some intrusive rocks may have been
mapped as extrusive rocks and vice versa. It was for example reported
that a small dioritic intrusive is located south/southeast of the Jumbo
showing. The particular outcrop was located/ but it could not be
clearly defined as a diorite. The map of geology attached notes these
possibilities by indicating and noting two different lithologies at the
same outcrop. The same goes for units of a gabbroic nature.
Diorites located in boulder display the typical "Salt and Pepper"
texture on the weathered surface. Distinct crystal seperation into
hornblende and plagioclase is visible as the rocks are medium to coarse
grained and massive. The fresh surface is invariably dark green to
black. The plagioclase appears to be slightly saussuritized. The rocks
are of a hypidiomorphic texture.
Possible gabbro units are located within the mafic volcanic package and
may likely, be coarse grained mafic flows as indicated above. Distinct
outcrops of gabbro were not located.
One distinctly different unit is situated south of the baseline on lines
104E and 125E. The units are differentiated on the geology map as
feldspar porphyry. The weathering surface is dark green to black with
approximately 3(^ euhedral to subhedral crystals and crystal aggregates
of plagioclase. These give the rock a porphyritic texture. The
crystals vary in size from five (5) mm to two (2) centimeters and are
randomly oriented. The plagioclase is weakly to moderately altered to
saussurite displaying a tan to green weathering surface. The matrix
consists of fine grained mafic material in composition equal to the
mafic volcanic flows. Percentages of these crystals vary from 5% to
75%.
It is possible that this type of rock is a massive porphyritic mafic
flow rather than an intrusive unit. The plagioclase crystals may have
been produced by crystal segregation within the innermost sections of
the magma prior to the eruptive phase. In that respect the unit could
possibly be used as a marker horizon. In practice this may be difficult
due to the limited outcrop exposure.
iv) Felsic Intrusive Rocks
The only felsic intrusive rocks noted on the property are dikes and
sills in composition varying from syenite to quartz/feldspar porphyry to
granite. These rocks are directly associated with the Winnie Lake stock
located to the southwest of the claim block.
The weathering surface is typically medium red to light pink with a dark
red to medium red/tan fresh surface. All outcrops noted are massive
with rare fracturing visible. The dikes and sills display a gradational
compositional change from being pure syenites away from the center of
the stock to granite within the central parts of the stock.
Quartz/feldspar porphyry appears to be the composition between the above
extremes. The trend of this compositional change is roughly
southwesterly towards the center of the Winnie Lake stock.
-M-
v) Diabase Dikes
Diabase dikes belonging to the Matachewan dike swarm are present in two/
possibly three localities. Several/ possibly interconnecting/ units of
diabase are noted north of the Jumbo showing. A small unit of diabase
is also located on the northern grid boundary/ north of the Kinika
Shaft/ and in the Toast Showing. In most cases the extent and
continuity of these dikes could not be established in outcrop due to
lack of exposure or cases of localized shearing with minor offsets.
c) STRUCTURE
Geological report 84 by Rupert and Lovell indicates that the structures
in Maissonville and Bernhardt Townships are controlled by a major
synclinorium trending eastwards in the two townships north of
Maisonville and Bernhardt Townships/ the Kirkland Lake belt south of the
property and the two stocks located in southwestern Lebel Twp. and in
southwestern Bernhardt Township. "To the northeast of both stocks/
broad folds generally trend north-northwest/ but between the stocks/ the
strata are crumpled into less regular folds/ the axis of which trend
approximately perpendicular to radial lines from the center of the
stocks. Consequently this region contains a number of small folds which
die out along their axial trend" (R.J. Rupert and H.L. Lovell/ 1970).
The overall trend of foliation in the volcanic rocks is 110O - 140O or
northwesterly. The majority of the rocks are vertically dipping. Foliation intensities vary from weak to strong with isolated/ localized
shearing along this overall trend being prominent features of the
exposed rocks.
Pillowed volcanics and top directions indicate a major anticlinal
structure to traverse the southern 1/3 of the claim group in an
east-west direction. The shape/ location and trend outside of the
property boundaries indicate that the structure is directly related to
the Winnie Lake stock as it appears to wrap around the borders of the
intrusive. This anticline is reported to be the southern most extension of the major synclinorium north of Maisonville and Bernhardt Twp.
Smaller scale folds are noted in the interflow sediments. The axis of
these folds are irregular and are believed to be the folds reported to
trend perpendicular to radial lines from the center of the Winnie Lake
stock.
Major fault structures are limited to the N-S trending variety. One of
these faults is located near the eastern edge of the property and
appears to be a strike-slip fault as indicated by the offset of an
intermediate volcanic flow unit. The offset is approximately 500 meters
(^ 100 meters).
Localized shearing with associated faulting is also evident in the
northwest direction as shown by steep sided valleys and cliff faces.
These faults trend roughly parallel to stratigraphy and are in outcrop
represented by localized shearing.
d) ALTERATION
Alteration on the Blue Mountain property is in outcrop limited to areas
of shearing/ quartz veining and felsic intrusive activity.
Carbonatization with or without silification are the most/ although
limited in extent/ dominant alteration products. Chlorite/ epidote and
saussurite alteration was noted in isolated occurrences. Hematite
veining and veinlets were also noted in rare quantities. The overall
metamorphic grade of the volcanic package of the property appears to be
lower to middle greenschist facies with chlorite being the dominant
alteration product.
Carbonitization in noteworthy amounts is found in areas of moderate to
strong shearing. The sheared pillows near the Jumbo Shaft may be named
as an example. Carbonatization is generally pervasive/ in intensities
varying from very weak in massive mafic flows to strong in moderately
foliated units. In strongly sheared units it is very strong with the
alteration dominant on the foliation planes. This type of alteration is
directly proportional to the foliation intensities present.
-at-
Secondary quartz/carbonate alteration is restricted to cross cutting
veinlets near the Jumbo Shaft and a similar situation north of the
Kinika Shaft (L99E/33+75N).
Silification is restricted to contact areas between quartz veins and
mafic volcanic rocks in areas such as the Knoll showing. The most
prominent/ strong and pervasive silicification is located in areas where
the felsic intrusive rocks outcrop or are believed to sit just below the
mafic volcanic outcroppings. These cases are very evident on the Jumbo
showing as well as near/ on and south of Blue Mountain. The mafic
volcanics become almost black in colour/ aphanitic and very hard both on
fresh and weathered surface. Conchoidal fracturing when struck is
noticeable.
Chlorite and saussurite alteration products are uniformly present on the
property in weak intensities. Both appear to be pervasive with a
moderate increase in chlorite content in areas of stronger foliation
intensities.
Epidote alteration was noted in microfactures especially in pillowed
volcanic flows. This alteration was limited in occurrence to patches
and blebs within the mafic package.
Hematite veins or veinlets/ possibly associated with quartz/carbonate
veinlets or veins was noted on the dump of the Kinika Shaft as well as
in outcrop on L108E/27+50N.
e) MINERALIZATION
Overall mineralization on the property is very limited and minor in
amounts. It consists predominantly of pyrite and/or pyrrhotite in
disseminated form not exceeding l* and in most cases averaging nil to
trace amounts. Mineralization in higher quantities were only noticed in
the previously found showings and shaft areas (See section f).
Chalcopyrite was noted in two localities. On L 100E/33+85N a small 10
cm thick quartz vein contain three (3) small pods of pyrite/chalcopyrite
in diameter not larger than 2 cm. In the Knoll showing rare occurrences
of disseminated chalcopyrite was noted (See section f).
f) SHOWINGS
i) Kinika Shaft
The shaft is located at L99+85E/31+75N. The shaft was sunk to 6 m with
a 13 m drift towards the north at the 15 m level. Records indicate
sampling to have shown average gold values of 0.16 oz/ton Au over 4.5 m
of the drift. A sample high of 86 oz/ton Au was recorded. The gold is
reported to be in its free state within a quartz vein hosted in strongly
silicified and carbonatized mafic flows. The dump pile contains
strongly altered mafic flows with mineralization in the rocks consisting
of pyrite/ pyrrhotite and trace chalcopyrite.
This geologic situation was however not located in the immediate area of
the shaft. Outcrops surrounding the shaft display rather unaltered/
weakly foliated mafic flows and mafic pillowed flows. The pillows are
rather undisturbed structurally.
ii) Jumbo Shaft
The shaft is located at 121+10E/30+45N. Extensive stripping was
undertaken in the immediate vicinity of the shaft giving good outcrop
exposures. The stripped area was mapped in detail at a scale of 1:500.
The geology is dominated by pillowed and foliated to strongly sheared
flows with subordinate amounts of interflow sediments.
The pillowed flows dominate the northern (grid) part of the stripped
area. They are stretched in their longitudinal axis. The stretch ratio
is approximately 3:1. They are moderately carbonatized. Mineralization
is not present in amounts greater than trace pyrite.
The southeren (grid) part of the area is dominated by moderately to
strongly foliated and sheared flows. Alteration is dominated by weak
carbonatization. Only H disseminated pyrite was noted in isolated
occasions.
Two interflow sediments were noted. One is located immediately to the
west (grid) of the shaft. It consists of a narrow band (10 cm) of an
argillaceous material. The second/ possibly iron formation with a 2 cm
thickness was noted in the C-l (see detail map) sample area. The zone
was moderately sulfidized along bedding planes.
The main foliation trends between 110O and 130 with several shear zones
cutting the foliation at a shallow angle (See detail geology sketch).
Near the shaft area crosscutting quartz-carbonate veinlets are noted.
Interesting mineralization and alteration occurrs in channel sample area
C-l.
Here foliated and sheared mafic flows were sampled. The amounts of
mineralization increased from 1-^ to ID-15% in areas of increased
silification and decreased sharply at the contact of the silicified and
carbonatized flows. This mineralized silicified zone trends towards the
shaft but may have been slightly offset by a north-south trending fault
or shear.
A total of eight (8) channel/chip samples were taken across the entire
stratigraphy exposed. All chip areas were sampled with l meter sample
intervals.
iii) Blue Mountain Shaft
The newly found shaft is located at L 116+90E/18+25N. From geology of the dump pile/ there is no outcrop in the immediate vicinity/ the shaft was sunk onto a quartz vein within silicified mafic foliated flows.
iv) Toast Showing
The showing is located on L 119E/3CH90N and consists of a shear with a quartz vein within mafic pillowed and foliated basalts. The shear is moderately carbonatized and silicified in cases of quartz vein intrusion. Schistosity trends 140O and is vertically dipping. Localized patches of up to ICft pyrite* pyrrhotite and minor chalcopyrite (?) were located. The quartz vein is seen to be locally kink folded/ boudinaged and weakly brecciated along its contacts with the mafics.
v) Knoll Vein
The showing is located on L 116E/30+45N and consists of two quartz veins hosted by mafic foliated flows and is in contact with a north-south trending diabase dike. The quartz is typical bull quartz with rare traces of sulfide mineralization within the vein. Patches of sulfide mineralization are noted in contact areas of the vein and the dike/ but amounts do not surpass 3%.
VI. GEOCHEMISTRY
To determine whether geochemical analysis of humus and/or soil horizons
would be able to locate gold bearing horizons and possibly differentiate
between the various IP-anomalies encountered during geophysical
surveying/ 565 humus samples and 250 soil samples were collected. The
areas sampled are indicated in figure 5. The sample interval was 50 m
except in the area of the Kinika Shaft. Here the interval was reduced
to 25 m.
The humus layer (A -Horizon) was encountered in all sample sites.
Sample depth varied from 10 cm in outcrop and dry areas to 1.10 m in
swampy areas. All samples consisted of lOOf. organic material.
Less than half of the sample sites gave the possibility of collecting
the B^soil horizon. This was mostly due to deep A horizons in swampy
areas and absence of the B.-Horizon in areas covered by a glacial till
layer. Samples collected contained various amounts of sand/ silt and
clay with sample depths varying from 20 cm to 70 cm.
No clear trends were located but isolated point highs and broad/ weakly
anomalous areas were located with the humus survey. No clear
correlation could be made with the geology or geophysical surveys and
the humus survey failed to indicate known gold mineralization.
Due to the less than 50% samples of the B. horizon availability no clear
anomalous trends which could be correlated to the A survey/ the
geological survey or the geophysical surveys were found. Again point
highs in isolated areas are present/ these however few and far between.
The large majority of results are within the background range.
y ^OM
SJ^^B
I
VII. GEOPHYSICS - SUMMARY
The results and their interpretation of the various surveys on the major
part of the property have already been discussed under seperate cover
(P. Diorio/ Geophysics of The Blue Mountain Property/ Feb. 1988). This
section is only to possibly explain with now known detailed geology the
various anomalies. Due to presence of a dominant overburden cover and
no favourable results from geochemical surveys/ most anomalies are still
open for interpretation and will likely have to be drill tested prior to
any conclusive evidence. For explanation refer to compilation map.
The presence of 99% of magnetic/ pillowed and foliated flows clearly
indicates the rocks belonging to the Kinojevis Group and thus explains
the alternating bands of magnetic anomalies as either repetitive units
about a fold axis or a large area of differentiated flows. No fold axis
was noted on the property except possibly an anticlinal structure
indicated by pillowed flows to lie approximately in the southern 1/3 of
the property.
Geological mapping did not explain the presence of the north-south
trending mag-anomaly roughly subparallel to L 133E/ nor the cause for
the main IP (A, b A~) anomalies located between and connecting the two
shafts. Anomalies c/ D/ E/ F s G could also not be explained by geology
due to a lack of outcrop in those areas. IP-anomalies B./ B2 and B3
could be the result of differently folded interflow sediments/ iron
formation with locally up to 2 % disseminated pyrite (sample I42/
L123E/33+15N). These units have been documented to occurr in a radials -
pattern around the Winnie Lake Stock (See above).
The VLF anomalies may be the result of unconformities and/or localized
shears between different flow units.
None of the trenches of previous exploration work explained any of the
anomalies.
RESUME OF QUALIFICATIONS
I/ Siegfried O. Weidner/ have earned a Bachelor of
Science Degree/ specializing in Geology/ at the
University of Toronto and have graduated in this field
in the spring of 1984.
I have been gainfully employed with BHP-UTAH MINES LTD
since the summer of 1984 and have a working knowledge
of this report.
x^ (7Siegfried O. Weidner
Ministry ofNaturalResources
Ont&jjo
*
RepOPl oTWork (Geophysical, Geological, Geochemical and Expenditures)
si 4aA98SEei5* 2.11578 BERNHARDT 900Type of Survevls)
Geological MappingClaim Holder(i)
'ownship or Area
L --iBernhardt S MaisonvilleProspector s Licence No.
Glencairn Explorations Ltd. / BHP-Utah Mines Ltd.respecter's L icence N o.
T-4924, T-793Address
137 Berkeley Street/ TORONTO/ Ontario, M5A 2X1Survey Company
BHP-Utah Mines Ltd.lOate of Survey (from 4 to) [Total Mi01 ,07 88 125 08 88 OA .
,JfcyJ..Mo. JJVr.^Lqiy J Mo.^Vr. j 80*j
Miles of line Cut
89 kmName and Address of Author (of Geo-Technical report)
Siegfried Weidner/ BHP-Utah Mines Ltd., P.O. Box 1953 , TIMMINS/ Ontario, P4N 7X1' Credits Requested per Each Claim in Columns at right
Special Provisions Geophysical
For first survey: - j Electromagnetic
includes line cutting) . Magnetometer
For each additional survey: ' n* d 'Om*tr 'eusing the same grid:
Enter 20 days (for each)Geological
Geochemical
Mjn Days Geophvs cal
^^^ l^wMbto L*MJMMC CWSftB^^^^a ; igfr^IBSI^Pfff t romsflneticf" * \ * 1 M; netometer
u AU6 29 1988i '';tu iometr 'c
X^/ Geologi si
Geochemical
Airborne Credits
Note: Special provisions Electromagnetic credits do not apply to Airborne Surveys. Magnetometer
Radiometric
Days per Claim
40
Days per
Days per Claim
———
Expenditures (exclucType of Work Performe
Performed on Claim(s)
Calculation of Expendit
Total Expenditures
ONTARIO , --ASSESSMENT FILES
OFFICE
tnrri4i988re Days Credits
R E C E l V^lg,
Mining Claims Traversed (List in numerical sequence)
15 -Instructions
Total Days Credits may be apportioned at the claim holder's choice. Enter number of days credits per claim selected in columns at right.
Mining ClaimPrefix Number
L 739257 '739258 "739259 '
7QC*fi9
700.3^! 799364i-799365 - -i 799372
799373j 799374
799375 '.799378 __ - 1:79.2380
799381799387
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ri. 799392-982623-—.
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Expend. Days Cr.
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Total number of mining claims covered by this ^^ report of work. ***'
Date
25/08/88RecordeO,Holder or Agent (Signature)
Certification Verifying Report of Work1 hereby certify that 1 have a personal and intimate knowledge of the facts set forth in the ReporTof W3flTBnn***x*h*felor*'evm5t55rforrned the work or witnessed same during and/or after its completion and the annexed report is true.
Name and Postal Address of Person Certifying
Siegfried Weidner/ P.O. Box 1953/ TIMMINS, OntarioP4N 7X1 Date Certified
25/08/88Certified^y (Signature)
1362 (81/9)
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