January 31, 2008
Shear reports HIGH DIAMOND COUNTS FROM FOUR kimberliteS DISCOVERED
at churchill IN 2007
Shear Minerals Ltd. (SRM:TSXV) and Stornoway Diamond
Corporation (SWY:TSX) today announced additional caustic fusion results from four
new kimberlite discoveries at the Churchill Diamond project in Nunavut. The kimberlite
dykes identified from drilling in 2007 have returned significant micro and
macrodiamond counts ranging from 29 to 138 diamonds per kilogram of kimberlite analyzed.
“Field activities at Churchill in 2007 identified
additional, highly diamondiferous kimberlite bodies in close association with
prominent structural trends,” says Shear President and CEO Pamela Strand. “Given the extremely high
diamond counts, which in some cases exceed 100 diamonds per kilogram, the
partners are optimistic that Churchill has the potential to host an economic
diamond resource.”
Ms. Strand says that future work will include prospecting,
geophysics and drilling along these favorable structures to examine grade
variability and search for zones of higher tonnage potential.
In 2007 drilling discovered four new kimberlite dykes that
are of high interest based on initial field observations confirmed by
microdiamond counts (see October 11, 2007 news release). These kimberlites
occur at the heads of three different G10 pyrope mineral trains in the Sedna
Corridor and are believed to be the source of the mineral chemistry based on
their close spatial association. The kimberlite dykes range in size from 10 to 50cm
true width and are highly altered with visible pyrope garnets.
Samples were submitted to the Saskatchewan Research Council Geoanalytical
Laboratories (“SRC”) accredited to the ISO/IEC 17025 standard by
the Standards Council of Canada as a testing laboratory for diamond analysis
using caustic fusion. Diamonds from these four dykes will be described,
categorized and assessed for any breakage. Complete diamond recoveries
were as follows:
Kimberlite
|
Sample
Weight (kg)
|
0.106 mm
Sieve
|
0.15mm
Sieve
|
0.212mm
Sieve
|
0.3mm
Sieve
|
0.425mm
Sieve
|
0.6 mm
Sieve
|
0.85mm
Sieve
|
1.180 mm
Sieve
|
Total
Diamond Count
|
KD-131
|
1.0
|
28
|
13
|
6
|
4
|
2
|
1
|
0
|
0
|
54
|
KD-142
|
1.7
|
40
|
23
|
7
|
9
|
3
|
1
|
0
|
1
|
84
|
KD-163
|
3.75
|
48
|
27
|
17
|
9
|
5
|
2
|
0
|
1
|
109
|
KD-244
|
2.2
|
116
|
82
|
49
|
30
|
12
|
9
|
5
|
2
|
305
|
1 The three largest diamonds measured 1.1mm
x 0.9mm x 0.7mm; 0.78mm x 0.6mm x 0.5mm; 0.7mm x 0.5mm x 0.4mm
2
The three
largest diamonds measured 2.7mm x 1.9mm x 0.32mm; 0.92mm x 0.9mm x 0.24mm;
1.14mm x 0.74mm x 0.34mm
3 The three largest diamonds measured 1.4mm
x 1.36mm x 1.1mm; 0.76mm x 0.66mm x 0.6mm; 0.7mm x 0.64mm x 0.48mm
4
The three
largest diamonds measured 1.86mm x 1.58mm x 1.06mm; 1.74mm x 1.52mm x 0.96mm;
1.62mm x 1.38mm x1.1mm
Additional diamond results are also reported from the Meeka
kimberlite. Meeka is an east-west linear kimberlite dyke 500m in length and
open in both directions (based on interpretation from ground geophysics). It is
located southeast of the Jigsaw kimberlite and was discovered by prospecting in
2007 (October 11, 2007
news release). A 15 kg sample of green coloured till adjacent to Meeka was
sampled previously and returned nineteen diamonds using caustic fusion. During
2007 a 102.8 kg sample of weathered kimberlite was collected for testing with
caustic dissolution in addition to a larger 1.8 tonne mini bulk sample for
processing utilizing dense media separation (DMS). Complete diamond
recovery results from caustic fusion of the 103kg sample at SRC are as follows:
Sample
Number
|
Sample
Weight (kg)
|
0.106 mm
Sieve
|
0.15mm
Sieve
|
0.212mm
Sieve
|
0.3mm
Sieve
|
0.425mm
Sieve
|
0.6 mm
Sieve
|
0.85mm
Sieve
|
1.180 mm
Sieve
|
Macros
|
Total
|
Meeka1
|
102.8
|
52
|
35
|
3
|
1
|
0
|
0
|
0
|
0
|
0
|
91
|
1
The three
largest diamonds measured 0.4mm x 0.3mm x 0.3mm; 0.28mm x 0.28mm x 0.22mm;
0.28mm x 0.2mm x 0.2mm
Prospecting on the property in 2007 also identified 16
new kimberlite discoveries occurring as outcrop and sub crop. A total of 291kg
of kimberlite was collected in 15 to 25kg grab samples from each new outcrop
and sub crop occurrence. In addition to the outcrops and sub crops, nine unforced
kimberlite float anomalies were found. Recently completed caustic fusion of
these samples did not return any significant diamond results.
The Churchill Diamond Project is owned 58.14% by Shear
and 41.86% by Stornoway and is comprised of the diamond rights to more than two
million acres located near the communities of Rankin Inlet and Chesterfield
Inlet in the Kigali region of Nunavut. Work is presently focused on
continued exploration of new promising indicator mineral trains and geophysical
anomalies as well as the evaluation of a system of significantly
diamond-bearing, vertically-emplaced kimberlite dykes that have returned sample
grades of up to 2.18 carats per tone. The 2008 field program is under the
supervision of Jennifer Burgess, P. Geol., a Qualified Person under NI 43-101. Ms.
Burgess is an independent consultant to Shear and has reviewed this news
release.
This news release may contain forward
looking statements, being statements which are not historical facts, including,
without limitation, statements regarding potential mineralization, exploration
results, resource or reserve estimates, anticipated production or results,
sales, revenues, costs, "best-efforts" financings or discussions of
future plans and objectives. There can be no assurance that such
statements will prove accurate. Such statements are necessarily based
upon a number of estimates and assumptions that are subject to numerous risks
and uncertainties that could cause actual results and future events to differ
materially from those anticipated or projected. Important factors that
could cause actual results to differ materially from either of the
Companies’ expectations are in Company documents filed from time to time
with the TSX or the TSX Venture Exchange and provincial securities regulators,
most of which are available at www.sedar.com. The Companies
disclaim any intention or obligation to revise or update such statements. The
TSX Venture Exchange has not reviewed and does not accept responsibility for
the adequacy or accuracy of this release.