Twin Mining Planning for Major 2002 Exploration Program
TWIN MINING CORPORATION
Suite 1250, 155 University Avenue
Toronto / Ontario M5H 3B7
Tel: (416) 777-0013 Fax: (416) 777-0014
Web-site: www.twinmining.com E-mail: Info@twinmining.com
TORONTO, Oct. 31 /CNW/ - Twin Mining Corporation ("Twin Mining") (TWG -
TSE) is pleased to announce that it is encouraged by the ongoing positive
results from the 2001 exploration program and is planning for a major 2002
program at Jackson Inlet. Program Highlights of the 2002 program are: i)
+10,000 meters of reverse circulation drilling (152mm diameter), ii) a 1,000
tonne surface bulk sample from the Freightrain pipe iii) a surface
magnetometer program to further delineate certain significant magnetic
anomalies detected during the airborne survey and iv) drill testing of Cargo
2, Cargo 3 and eight other anomalies.
The 2001 exploration program, which included 17 NQ (47mm diameter) drill
holes and six sample pits yielding 320 wet tonnes of diamondiferous bedrock
kimberlite, has substantiated the surface dimensions of the Freightrain pipe
as indicated by the earlier magnetometer survey (see press release of June 26,
2001). The drilling provided a near surface indication of the outline of the
diamondiferous kimberlite pipe, in plan and in section (see plan and vertical
section in the Appendix).
2001 Core drilling
------------------
Seventeen (17) holes, totaling 1108 meters, were positioned to test the
extent of the diamondiferous kimberlite body at three points along the
anticipated perimeter of the pipe. Eleven (11) of the 17 holes tested the
outer edge of the pipe while six (6) were drilled in the central area of the
pipe. Twin Mining was delighted with the drill results which showed a total of
314 meters of kimberlite intersections in 15 of the drill holes (see attached
Summary Kimberlite Logs).
The kimberlite logged at Freightrain is consistent with previous
petrographic studies by Lakefield Research Limited ("Lakefield") which report
both crater and diatreme facies textures. It contains an important volume of
autoliths, varying in size of up to 25mm. Many holes recovered mantle
xenoliths up to 70mm in diameter, containing pyroxene and olivine assemblages
characteristic of lherzolite and hartzburgite. Key indicator minerals such as
pyrope garnets, diopside, phlogopite and spinel are common, olivine
macrocrysts (up to 70mm) and serpentine nodules (up to 120mm) were noted to
occur throughout the Freightrain kimberlite drill core.
A further 2 holes, FT03 and FT05, were drilled entirely into what are
believed to be limestone xenoliths (see vertical section in Appendix). This
limestone is considerably altered and fractured as could be expected from its
position in the kimberlite mass. Large blocks of xenoliths are not unusual in
large pipes and have been reported e.g. in the Premier kimberlite mined by
DeBeers in South Africa (Diamond Geology -- published on
www.debeersgroup.com).
Future exploration will employ drilling techniques (e.g. Reverse
Circulation Drilling) that are more reliable in permafrost and altered and
fractured ground conditions. This should insure that the drill holes reach
their target depth, which was 165 meters for the 2001 drilling season.
One single hole, JI-ANO4B-01, tested the 150m diameter magnetic anomaly
ANO4B, redesignated as Cargo 2 (see press release of October 4, 2001). The
hole remained in limestone for 119 meters. Subsequent soil sampling produced
encouraging diamond indicator minerals. A ground magnetometer survey, together
with detailed soil sampling, will permit more precise drill targeting this
anomaly during the coming exploration season.
2001 Mini-bulk Sampling
-----------------------
Six (6) bedrock kimberlite samples were collected from Freightrain
covering the central 250 meters area of the pipe. The sample locations (see
plan and vertical section in Appendix) were based on surface exposure and
previous results (see press releases of December 20, 2000 and July 18, 2001).
<<
SITE BAGS FILLED ESTIMATED WEIGHT
---------------------------------------------------
(tonnes)
JI-1 190 90
JI-3 160 80
JI-4 121 60
JI-5 75 35
JI-5S 10 5
JI-6 105 50
------------------------------------------
TOTAL 661 320
>>
As a result of suspected breakage of larger diamonds when crushing
previous samples (see press release of July 18, 2001), the Dense Media
Separation (DMS) plant circuit at Lakefield, has been modified to facilitate
passage of diamonds of up to 1/2 inch (12.7mm) diameter instead of the
previous 6mm.
The M/V Umiavut has arrived at Valleyfield, near Montreal, Quebec. The
mini-bulk samples, approximately 2000kg of core samples and 120 bags of soil
samples, are currently being transferred to Lakefield for processing.
Twin Mining, in addition to exploring the Jackson Inlet diamond project
on Baffin Island and the TORNGAT diamond project on the east side of Ungava
Bay in northern Québec, also holds a gold mining project in Idaho, United
States of America.
SUMMARY KIMBERLITE LOG and/or Plan and vertical section can be viewed on
our website www.twinmining.com, under "News Releases" (Current News Release)
Please visit our website (www.twinmining.com) to view the updated
slideshow (October 2001) for TORNGAT and Jackson Inlet under "Diamond
Properties". |
