Leader Mining: Bright Lake Tantalum Project -- Follow Up Program
CALGARY, Alberta--May 6, 2002--Leader Mining (CDNX:LMN) is planning a follow-up field program at the Company's Bright Lake Tantalum Project, located in northeastern Saskatchewan.The project area covers 61,000 hectares, extending over an area of about 25km x 15km, underlain by fractionated granites, pegmatites, and aplites.
In 2001, the Company consultant, Dr. Eckart Buhlmann, collected a total of 57 rock, 37 stream sediment and 20 lake sediment samples in tracking the regional tantalum-in-lake-sediment anomalies to source areas. The survey produced significant values in Tantalum, Rubidium, Lithium, Cesium, and Tin.
Results of rock sampling - Table 1
(Note - Average mining grade at the large Greenbushes tantalum deposit in Australia is 230 gm/T Ta2O5)
Two pegmatites that yielded surprisingly strong tantalum values in September 2001 (News release of November 8, 2001) were re-sampled in November 2001, confirming high Ta2O5 values. Table 1 summarizes the result obtained in September and November, 2001.
Sample Location Date Ta2O5 Li Rb Cs Sn
g/tonne ppm ppm ppm ppm
8109 E Marchant Sep 01 54 62 467 22 85
8110 E Marchant Sep 01 118 528 5500 238 695
8122 E Marchant Sep 01 147 126 578 61 80
8123 E Marchant Sep 01 104 109 116 6 42
755340 E Marchant Nov 01 74 291 3220 164 386
755341 E Marchant Nov 01 77 261 3180 170 376
755344 E Marchant Nov 01 62 40 903 26 18
8117 Premier South Sep 01 337 110 438 75 49
755162 Premier South Nov 01 291 103 916 52 22
755334 Premier South Nov 01 93 89 1290 108 2
755336 Premier South Nov 01 92 137 487 45 29
755337 Premier South Nov 01 120 66 60 7 9
755353 Premier South Nov 01 75 67 1380 38 2
Results of lake sediment sampling - Table 2
(Detection limit for tantalum is 0.5 ppm and anomalies over 0.6 ppm tantalum are significant.)
To verify and detail the lake sediment geochemical tantalum anomalies reported by the Geological Survey of Canada in the Bright Lake area, 4 anomalous lakes were selected and sampled in detail by Leader. The results confirm significant tantalum anomalies in all 4 lakes and they broadly define the source areas. Table 2 summarizes the results of the lake sediment sampling.
Sample Location Ta Rb Cs
ppm ppm ppm
LS AD 02 Addie L 1.0 66.0 11.0
LS AD 03 Addie L 1.0 47.0 13.0
LS AD 04 Addie L 1.0 51.0 12.0
LS AD 05 Addie L 1.3 81.0 15.0
LS MAR 04 Marchant L 1.0 44.0 7.8
LS MAR 05 Marchant L 1.3 140.0 15.0
LS SE 04 Premier South L 0.9 81.0 6.7
LS TPS 03 TPS Lake 1.0 120.0 11.0
LS TPS 07 TPS Lake 1.7 97.0 11.0
LS TPS 08 TPS Lake 1.4 58.0 12.0
Summarized results of stream sediment sampling - Table 3
The results of the stream sediment survey include several strong tantalum-lithium-rubidium-cesium anomalies, pointing to three potentially large, mineralized source areas. The stream sediment survey was designed to test inflow and outflow streams of the lakes with the strongest lake sediment anomalies. The results are summarized in table 3.
Location Ta Li Rb Cs Sn
ppm ppm ppm ppm ppm
Addie Lake 3.9 192 146 57 2
Addie Lake 3.1 87 80 6 2
Addie Lake 7.5 133 86 10 6
Addie Lake 3.1 84 50 11 9
Marchant Lake East 4.9 87 113 17 5
Marchant Lake East 2.0 134 92 35 2
Schurman/Marchant/S-Bay 3.0 50 5 4 2
Schurman/Marchant/S-Bay 2.3 124 76 19 11
Schurman/Marchant/S-Bay 2.5 72 54 19 5
Schurman/Marchant/S-Bay 4.9 127 104 20 12
Schurman/Marchant/S-Bay 4.3 83 88 15 9
Schurman/Marchant/S-Bay 3.1 60 71 14 2
TPS Lake 2.5 104 109 10 11
TPS Lake 4.0 37 56 9 2
The 4 main anomalous areas are described briefly (map outlining these four areas will be posted to our website by May 15, 2002):
Addie Lake Target Area
Addie Lake is located near the western limit of the property, 3 strongly anomalous samples represent 3 streams. The catchment basins are aligned along a N-S trend immediately NE of Addie Lake. One or more large pegmatites are likely to occur in this area. The area is a prime candidate for detailed prospecting. Sample #114 represents an out flowing stream, the other samples are from in flowing streams.
Marchant Lake East Target Area
East of Marchant Lake, two strongly anomalous stream sediment samples point to an elongate catchment area with a SE trending near vertical pegmatite of 1.5 - 2.5 km potential strike length. Two exposures in near vertical cliff faces yielded rock samples with Ta2O5 values to 147 g/t and tin values to 695 g/t. This interesting pegmatite complex requires detailed sampling and mapping.
Schurman Lake Target Area
Several strong stream sediment anomalies point to a large source area northeast of Schurman Lake and south of Marchant Lake and west of the south arm of Marchant Lake. The general area is located near the centre of the property package. Aerial photos indicate a large pegmatite body in this area and Leader's November 2001 reconnaissance visit confirmed the presence of a large, flat lying pegmatite body. The area is especially interesting because of its potential size. Stream sediment geochemical results suggests the possibility of a highly fractionated pegmatite. The area requires detailed prospecting, mapping and sampling.
TPS Lake Target Area
At TPS Lake the outflow stream produced the best values (sample #102) suggesting that the source is mainly under the 6 km long lake.
Overall, the September/November 2001 geochemical survey was successful in tracking the regional tantalum-in-lake-sediment anomalies to source areas, and defined several highly interesting target areas for tantalum mineralization. A follow-up program of detailed prospecting, mapping and trenching of mineralized source areas is being undertaken to delineate drill targets. The cost of the initial field program is estimated at $75,000.
To find out more about Leader Mining International Inc. (CDNX:LMN), visit our website at www.leadermining.com.
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