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GEOLOGICAL REPORT
OF PLATEAU METALS LIMITED'S CLAIMS
ADAMS PLATEAU,CHASE,B.C.
1190
S-alJJ
510
STANLEY J; PEDLEY
WORKSUPERVISED BY DR. C. RILEY
April
1, to November 21,1951.
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Summary
1
Introduction
1
Topography
2
Claim Geology
2
Sedimentary
Rocks
3
Metamorphic
Rocks
4
Volcanics
5
Gneiss
6
Intrusive
6
Structures
7
Mineralization
9
Correlation
,,y ( Geological
ork Map
ffp
Rocks
of Geology & Geophysics
10
1
In Envelope.
ACKNOWLEDGEMENTS:
Thanks are rendered
Gunning,
Department
to Dr. H.C.
of Geology,
and examined the thin
sections
who prepared
used in this
report.
Appreciation
Dr.
C. Riley,
phases
P. Eng.,
of the mapping,
Mckdams who helped
the field
mapping.
with
Is also
felt
toward
who supervised
all
and to Keith
A.
the latter
part
of
GEOLOGICAL REPORT
PLATEAU METALS LIMITED
1951
The properties
L
of Plateau
by a series
of sedimentary
been highly
metamorphosed.
acid
north-south
this
zone of weakness,
Me&.'as are underlain
and volcanic
These are cut
dykes and north-south
is widespread.
copper,
Folds,
dams and shear
which have
by basic
faults.
zinc,
favourable
or fissure
rocks
and
Along
snd lead mineralization
replacement
horizon,
zones are the localizers
dyke
of this
mineralization.
Geophysical
these
methods were successful
In finding
horizons.
INTRODUCTION
The Plateau
north
property
of Shuswap Lake between
Creek Valleys.
dirt
building,
is along a rough,
road.
on, together
stripping
lies
the Adams Lake and Scotch
the summer of 1951, geological
During
north
The plateau
Access to the property
good-weather,
was carried
is located
on the Adams Plateau.
of Chase, B.C.,
L
Metals
with
with
geophysical
bulldozers
mapping
mapping,
road
and diamond drilling.
Mapping was based on the chain and compass lines
which
were laid
intervals.
by transit.
lines
out for
the geophysical
The main base lines
on this
Happing beyond the limits
was carried
on with
survey
grid
at 400'
were surveyed
of the geophysical
pace and compass traverses.
-
2
-
TOPOGHAPKY
The center
of the old Adams Plateau
surface
is deeply
Creek.
The west fork
center
of Plateau
creek,
in
and is
west
it
rises
along
central
there
parts
feet
land
consists
deep.
In this
Local
creeks.
above
running
It
evergreens
valleys
claims,
close
has an
cover
on the
a balsam and
is moderate
and
by the creeks.
on the high
with
of residual
outcrops
To the
800’
a ridge
Windfall
is blanketed
stream
is relatively
to a point
forms
of this
of the property.
occur
largely
area
parallel
of the
predominates.
Good outcrops
the
6,000’.
is heavy undergrowth
cover
the land
Lower in the creek
and eastern
The remaining
through
meadows amid scattered
slopes.
forest
small
the limits
Nikwikwaia.
To the east
of land
of approximately
the higher
runs
but steadily
This height
Alpine
creek
of the claims,
unevenly
northeasterly
flowing
Metals’holdings.
cut by several
the creek.
spruce
of this
the limits
flat
elevation
cut by the south
peneplalned
overburden.
soils
and glacial
are mostly
western
five
deposits
found
in
ridge.
This
to twenty
also
the creek
occur.
bottoms
and cutbanks.
CLAIM
GEOLOGY
The rocks
a high
degree
schistosity
strikes
northwest.
within
of regional
planes
the property
metamorphism.
and composition
to the northeast
with
dips
have all
undergone
Bedding planes,
bands show consistant
averaging
200 to the
3
-
-
In the western
of the rocks
local
limey
argillites
these
amphibole
lie
rocks
masked, a series
and quartsites
a horizon
rich
which
schists
near the contacts
the schists
in turn
there
of
were mapped.
of chlorite
horizons
Beneath
intrusives,
volcanic
where the characteristics
were not completely
limestones,
Underneath
area,
with
of basic
is a series
were underlain
of
by a gneiss.
SEDIbENTARY ROCKS
The younger
west
of the property,
them as having
divided
rocks,
those
which
show sufficient
a sedimentary
outcrop
evidence
origin.
In turn
on the
to classify
they
can be
as follows:
Arsillltes
These light
green
ridges.
They have a moderate
l/8
to l/4
inch
and limestones
inch
to grey rocks
lime
bedding
content
bands.
are contained
form low broken
and often
show
Lenses of quartsite
within
them.
Ouartzites
These form highly
veins
of quartz
bedding
resistant
are present,
ridges.
The outcrops
Edany fissure
show some
but are commonly massive.
Limestone%
Low, slumped outcrops
coloured
quartzites.
calcite
horizons
limestone
of light
are found between
They contain
and otherwise
are coarsely
fine
closely
the argillites
recrystallized
resemble
crystalline
A second black
green to grey
limestone
and
seams of
the argillite.
and are a true
is also
Some
marble.
present.
It
is
4
-
characterized
-
by bands up to l/2
weathering
recrystallized
inches
thick
of cream-
calcite.
MEXAMORPHICROCKS
Underlying
metamorphic
rocks
the sediments
whose origin
is a horizon
is
unknown.
These are predominately
rock
is
showing
contains
banded with
green chlorite
a schistose
to gneissic
pyrite
alteration
or magnetite
phase near certain
an amphibole
chlorite
mediate
rock.
and white
crystals
basic
This
calcite
commonly it
up to l/4’:
An
dykes was mapped as
examination
of three
schists,
Chlorite
Schist
- much biotite
thin
sections
one of an inter-
phase and one of the amphibole
The summary of the descriptions
1.
schists.
structure.
one of the chlorite
contact
chlorite
schist.
A microscopic
was made --
of
bearing
is as follows:
or Gneiss
and chlorite
- lo;‘: quartz
- Feldspar
- sodic
plagioclase
- less than
the quartz
- much calcite
- abundant
epidote
- a few cubes of pyrite
- streaks
of spots
of a clay
product(leucoxene?)
-59
2.
Schistose
phase of Amphibole
A granulated
highly
-
rock
gneissic
Schist.
foliation
recrystallized.
Feldspar
- Little
probably
sodic
plagioclase
or no quartz
- Chlorite
- green
- Epidote
residual
and much fine
- Leucoxene
3.
with
Clorlte
Amphibole
gralned
epidote
- some titanite
gone over
leucoxene
Chlorite
- 35,i greenish
- 35% epidote
to
Schist .
to buff
amphibole
and clinozoisite
- 10 - 15s fresh
- Calcite
of some amphibole
(secondar
minerals T
feldspar
- plagioclase
to oligoclase
intergranular
to other
replacing
amphibole
close
minerals
- Chlorite
a few nests and intergrowths
possibly
metamorphosed from an igneous
VOLCANICS
A series
These are mostly
traps
with
of volcanic
massive,
a few thin
dark,
felsite
their
attitude
the volcanics.
fine
bands.
shows one or two bands of white
bedded with
rocks
underlie
to medium grained
The upper
crystalline
The outcrops
is not determinable.
the schists.
section
marble
are massive
interand
and
rock.
-
6
-
GNEISS
In the southeast
highly
siliceous
dark minerals.
there
feldspars
A fine
was mapped across
is
with
some
bands are regular
and
quartz
to the sedimentary
grained
rock
resembling
the northern
claims
as quartsite.
Here the highly
altered
contains
amounts of introduced
their
from
large
original
nature
the gneiss
and folded
formations.
the gneiss
of the property
country
quartz
completely.
in thattfie
However,
light
to dark
rock
ivhich mask
it
bands are highly
and are generally
a
rock
and white
The composition
and dip parallel
outcrops
131s d=rk reddish
gneiss.
composed of pink
strike
corner
differs
contorted
green in
colour,
MICROSCOPE
A thin
Fine
grained
quarts.
swirled
Some feldspar
of this
rock
and folded
Much chlorite
Much epidote
This
section
after
it
is summarized
thus:
shows much granular
a green amphibole.
and soisite.
1 to 2$ Intergrowth
may be an altered
with
sedimentary
quartz
mosaic.
rock,
JNTRUSIVE ROCKS
The oldest
to medium grained
radiolites
amygdules
intrusive
black
dykes.
of a green amphibole
of calcite.
rocks
are a series
These contained
of fine
small
and commonly contained
-
7
-
The dykes occur
have steep
dips
few strike
coast-west.
to a green
sand.
singly
and most strike
refracturing
Contacts
Magnetite,
small
were relatively
fresh,
No ferro-magnesium
the nearby
and feldspar
minerals
nearby
They also
country
rock
pyrite.
These acid
wherever
they
is
rock
rock
and
rhyolite.
with
fine
to
This rock
very minor
pyrite,
are present.
are dyke like
follow
a north
Is saturated
rocks
white
in form wlth
south
with
trend.
quartz
uneven
The
and minor
form high resistant
ridges
occur.
A contact
of this
and pyrite
country
is a fresh
porphyritic,
These intrusions
contacts.
showing
of amphibole
chalcopyrite
intrusive
medium grained,sometimes
of quarts
quickly
and drag folds.
The youngest
consists
a
alterations.
by the development
pyrrhotite,
shears
although
weather
are commonly found replacing
filling
They
rocks
and no metamorphic
are characterized
ml.nerals.
north-south
These basic
These intrusives
little
and in swarms.
within
the younger
with
the basic
the rhyolite
dykes show xenoliths
indicating
the latter
of the two.
STRUCTURES
Folding
Most attitudes
easterly
strike
However,
local
observed.
were also
of the rocks
gentle
Many small
seen.
taken
folds
revealed
with
a consistant
a shallow
up to 100 feet
dra:; folds
southwest
northdip.
wide were
under a foot
in amplitude
*
8
-
Faulting
Two large
faults
were mapped.
One along
West Fork Creek and one along Shmoo Creek.
isolated
gouge and breccia
of others.
'However,
prevents
the construction
the country.
breccias
follow
The fault
often
vuggy,
and microcrystalline
width.
with
the north-south
quantities
quartz.
trend
by local
is common and at
green fluorite
Gouge bands are found up to five
by creek
the fault
is
feet
in
zones are represented
valleys.
Bdinor fractures
They usually
have less
commonly perpendicular
Graphite
of
both crystalline
Pyrite
crystalling
Topographically
white
picture.
zone is characterized
Shmoo Creek a coarsely
abundant.
the presence
number of outcrops
of a fuller
These faL:lts
Numerous
zones indicate
the limited
the
are common over all
than a foot
chlorite
displacement
to the schistose
commonly forms
along
and sericite
and are
or bedding
the slips
forms
the property.
planes.
in the sediment
along
the slips
in the
schists.
)UNERAI,IZATION
On the present
first
It
encouraging
consisted
chalcopyrite
there
feet
survey
find
Plateau
of a few large
replacement.
Further
in the spring
anomalies
existed
holdings,the
was made by prospectors
was a mineralized
thick.
Metals'
boulders
carrying
These suggested
zone which could
promise
was given
in 1950.
rich
that
nearby
be over four
by a geophysical
of 1951 which showed a number of
in this
area.
Bulldozer
on later
9
stripping
and diamond drilling
In the year
Bulldozing
which
was later
be summarized
explore
supplied
confirmed
this
much valuable
zone.
information
by diamond drilling.
This can
as followsr
Sulphide
the property.
to further
was carried
mineralization
Several
loci
is widespread
of mineralization
beds - Horizons
across
are recognized,
1.
Favourable
2.
Damming - The basic dykes occasionally
acted as
dams to the circulating
mineralizing
fluids
leaving
the "favourable
beds" on one side of them
richly
replaced.
3.
Folds - The shallow folds concentrated
mineralization
at the apex of the anticlines.
This is also true
in the case of smaller drag folds.
4.
Slips and fractures
of ten contained
of chalcopyrite
and pyrite.
5.
Contact replacement
- particularly
contacts
of some basic dykes.
Any one or combination
is considered
as favourable
Pyrhotite,
common and galena,
chlorite
present
schist
horizons
in the lavas
fine
of the first
sphalerite
seams
on the
four
of these
locations.
is predominately
molybdenite
The deposition
to replacement
true
prospecting
The mineralization
chalcopyrite.
favourable
pyrite
and magnetite
and hematite
and
are
are also
present,
of the minerals
favoured
the
but interesting
deposits
are also
and quartzites.
-
10
-
CORRELATIOI: OF GEOLOGYAND GEOPHYSICS
k geophysical
the property
Ltd.
plored
early
geological
were found
sediments
2.
bearing
ex-
certain
within
fell
close
bearing
schists
favourable
the
to
shear
they
zone.
followed
horizons
or
of horizons.
On the east
apparently
zone.
graphite
the chlorite
mineral
3.
with
of the property
the anomalies
defined
Within
series
to correlate
and later
These were as follows:
On the west
well
on
by XcPhar Geophysics
mapped on the survey
horizons.
1.
Survey was conducted
in the spring
The anomalies
in detail
E.U.
of the
followea
property
one anomaly
a mineralized
shear
COSTS OF GEOLOGICAL SURWZ - PLATiZAUMET.&LSLIMITED
SEMOi? OF 1951
S.J.
haleg
K.A.McAdam
Dr.C.Rilsy
S.A.Sc. Geologist
Asst.Geologlst
Consultant
July 22-31 7
Aug.1.31
2
SepLl-30
735
.Aug.l9Sept.15
July 22.
Sept.30
25
10
$15.00
$900.00
$9.00
$225.00
835.00
$350.00
$1475.00
c. Riley.
Ihc;;ber
27,1951.