Chargeability Bird’s Eye View at 2338 m |
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First
Drill Target - Cross Section 63
- Kutessay III
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The
geophysical survey done over
Kutessay II and Kutessay III was
a dipole-dipole induced
polarization survey along with a
magnetometer and surface
gamma-spectrometry done by Tien
Shan Ltd. T, K, U, KT, and M
represent Thorium, Potassium,
Uranium, the relationship
between Potassium and Thorium,
and Magnetism, respectively.
These measurements are taken on
surface. When compared to
Kutessay II, and other explored
areas in the Aktyuz Ore field
along the major east-west fault,
spikes in Thorium, combined with
magnetic lows have proven to be
a good indication of rare earths
coming to surface. |
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Image definitions:
Chargeability - In
time domain IP measurements, the
ratio of the secondary voltage
measured during the current
off-time to the primary voltage
measured during the current
on-time is related to the
electrical polarizability of the
rock and is called
chargeability. A high
chargeability response is an
indication of the presence of
metallic sulphides and oxides.
Resistivity
- Resistivity is the property of
a material that resists the flow
of electrical current. The
resistivity image is created
through the observation of
electric fields caused by
current introduced into the
ground.
(Note that generally, rare
earths are not correlated with
sulphide mineralization, but
given that Kutessay II's
polymetalic structure is mixed
with the rare earths, these
deposits are unique, and should
not necessarily be compared to
other rare earth deposits around
the world. Given the proximity
of Kutessay II and III, in this
case, rare earths could be
associated with sulphides that
are indicated in the
chargeability highs) |
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Chargeability Eye view at 2338 m |
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Link to image Gor_2338_2
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This
chargeability image depicts the
horizon at 2338 m above sea
level. The black outline
indicates the planned outline of
the edge of the Kutessay II pit,
with the shaded area
representing the bottom. Each
cross cut number 58 through 76
was run to create vertical
images to a depth of roughly 400
m. Crosscuts 62-65 represent the
newly defined drill target |
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Chargeability Bird's eye view at
2293 m
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Link to image Gor_2293_en
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This chargeability image depicts
the horizon at 2293 m above sea
level.
The black outline
indicates the planned outline of
the edge of the Kutessay II pit,
with the shaded area
representing the mineralization
in the bottom of the pit.
Each cross cut number 58
through 76 was run to create
vertical images to a depth of
roughly 400 m.
Crosscuts 62-66 represent
the newly defined drill target.
When compared to horizon
2238, one can see that the
chargeability levels widen and
strengthen to depth.
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Line 72 - Kutessay II
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Link to image Pr_72_2 |
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| This map is
used to compare the geophysical
results in Kutessay III, to the
past producing mine, Kutessay
II. Thorium spikes correspond
with magnetic lows and acts as a
good indicator of rare earths of
surface. The chargeability high,
corresponding with the
resistivity low suggests a
highly conductive zone of
sulphides with strong levels of
mineralization |
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Cross Section 65 -
Kutessay III |
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Link
to image
Pr_65_2
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Elevated thorium levels between
500 and 750 matches the magnetic
low, and suggests the presence
of rare earths.
The chargeability high
matches the resistivity low that
suggests a metallic presence
that expands to depth.
There also appears to be
a corresponding deep zone off
the map to the right.
The tip of this structure
appears to graze the surface,
and so surface work could help
to indicate what is below |
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Cross
Section 64 - Kutessay III
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Link to image Pr_64_2
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Thorium levels between 1250 and
750 indicate a slight raise that
corresponds to a magnetic low.
This image suggests the
dome-shaped mineralization does
not actually reach the surface
though, and so compared with
other cross-sections in the
area, elevated thorium levels
should not be expected.
The resistivity high
suggests a change in the rock
type to perhaps a quartz-rich
mineralization, compared to
cross section 65.
The chargeability high is
quite broad compared to the
Kutessay II pit, but similar in
that it also expands and
strengthens at depth.
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Cross
Section 63 - Kutessay III
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Link to image
Pr_63_2
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This area is the location of the
first planned drill hole.
A Thorium high
corresponds to a magnetic low.
The chargeability
indicates sulphides reaching the
surface, and strengthening to a
depth of below 400 m.
Extreme resistivity highs
indicate a unique rock structure
compared to its surroundings and
suggests there is a cap rock 75
m below surface that prevented
mineralization from penetrating
through to the surface.
The separation of the
intense resistivity zones is
likely caused by the main
east-west fault.
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Cross
Section 62 - Kutessay III
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Link
to image Pr_62_2
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The high spikes in Thorium
content, in combination with the
magnetic lows indicate that rare
earth mineralization likely
comes to surface.
The chargeability image
indicates a pipe of sulphide
mineralization reaches the
surface.
Extreme resistivity highs
indicate a unique rock structure
and suggest there is a cap rock
75 m below surface that
prevented mineralization from
penetrating through to the
surface.
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Geological
Map 500
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Link
to image GeoMap5000_EN
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The main
east-west fault represents the
priority target for the 'Aktyuz
Ore Field's' exploration
program.
The theory from Soviet
geologists was that this fault
zone is the source of most
mineralization in the area, and
dome-shaped mineral structures
could exist in many areas below
the surface.
The geophysical results
from Kutessay III suggest Soviet
geologists were correct, but
they never drilled deep enough
to find additional significant
zones as seen in these current
surveys as most holes were only
drilled vertically to 50 meters.
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For a detailed explanation of
the Geophysics used, please
download the following
translated document:
Link
to document
Geophysical Methodology.doc
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