6 targets to be drilled, Back Lake project (-NEWS-19 Mar 98)
Kalahari Resources Inc KLA
Shares issued 30,098,251 Mar 18 close $0.72
Thu 19 Mar 98 News Release
Mr Albert Applegath reports
The primary focus of the Back Lake diamond exploration project since
November 1997 has been to locate the primary kimberlite source of the
ice-transported Yuryi kimberlite float material discovered on the shore of
Munn Lake during August 1997.
The Yuryi kimberlite float material is within a 150 metre diameter area
with some of the larger pieces of kimberlite being in the 10 to 20 metre
diameter range. There is also a strong development of kimberlite mud along
the Munn Lake shoreline.
Microdiamond testing of the Yuryi kimberlite float material has returned
226 diamonds from 581.29 kg of treated kimberlite. Sixty-two diamonds are
greater than 0.5mm in their largest dimension, with one 0.12, one 0.03 and
three 0.01 carat diamonds being recovered. Overall, the majority of the
diamonds are clear and colourless.
Kimberlite indicator microprobe chemistry results from the Yuryi kimberlite
indicate that 41% of the 50 pyrope garnets probed lie within the C10 field
and 6 of the 49 chromites probed have diamond inclusion chemistries.
The program to date has located 12 kimberlite dykes that occur in the
vicinity of the Yuryi kimberlite float area, however, a comparison of the
chromite microprobe chemistry between the chromites hosted by the
kimberlite dikes and the chromites hosted within the Yuryi float material
suggest that they are not related. The chromites from the kimberlite dykes
have a 2% to 3% higher TiO2 value than the chromites that occur within the
Yuryi kimberlite.
During November and December 1997 a 175 line kilometre picketed grid was
established covering the up-ice area of the Yuryi kimberlite float
location. This was followed by a completion of a magnetometer survey,
horizontal loop and time domain (EM-47) electromagnetic surveys, a
bathymetry survey (lake bottom depth) and the collection of 180 lake bottom
sediment geochemical samples at 100m centres.
The above surveys have delineated approximately 16 targets that could be
the result of kimberlite pipe intrusions. Most of the targets are within
300 metres of the shoreline. A total of five deep depressions have been
defined with corresponding anomalous lake bottom sediment geochemical
results that are high in chromium, titanium, niobium, nickel, magnesium,
uranium and rubidium which are suggestive of a kimberlite source.
A number of high priority ground electromagnetic targets occur up ice of
the Yuryi kimberlite float area with one particularly strong coincident
time domain EM-47 and horizontal loop electromagnetic conductivity anomaly
that is approximately 400 metres by 150 metres in dimension.
Diamond drilling to test the 16 various anomalies will commence during the
first week of April. A total of 2,000 metres of drilling is expected to be
completed by the end of May.
Approximately 1,200 of the 1,700 till samples collected during 1997 have
been processed for the recovery of kimberlite indicator mineral grains. The
till sampling program was designed to further define six kimberlite
indicator trains that occur within the property. The indicator mineral
trains have pyrope microprobe chemistries that range between 20-40% G-10s.
Interpretation of the new results is continuing. From March to the end of
May 1998 approximately 300 line kilometres of magnetometer and horizontal
loop surveys will be completed to locate the primary kimberlite source of
the above mineral trains. In addition, approximately 1,000 further lake
bottom sediment geochemical samples will be collected and bathymetry
surveys will be completed covering lakes of interest.
SouthernEra, since March 1994, has spent approximately $5,900,000 on
exploration with $1.7 million expended during 1997. The exploration budget
for 1998 is expected to be $1.1 million Kennecott previously spent
$2,200,000. Over $8,000,000 has been spent on this project so far.
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