São Lourenço Project
The São Lourenço Tin Project comprises an option to acquire a 100% interest in approximately 3,500 hectares of Mining Licenses in Rondônia State, Northwest Brazil. The Company has completed surface exploration work that outlined a significant body of primary tin mineralization on the adjacent Isaac and Irene targets, with an average grade of 0.61 % tin. An agreement was also reached with the underlying owners of the mining rights to extend the Company’s purchase option until 2012.
The Company has been sampling two granite stocks, Irene and Isaac, which stand out as hills within a wide area of past placer tin mining. Artisanal workings there have exposed a wide area of fresh and weathered (saprolite) granite that has now been systematically grid sampled with channel samples. Coarse-grained tin mineralization in the form of cassiterite (a tin oxide) is hosted by vein-like zones of alteration known as “greisens” that form a dense stock-working over most of the exposed area and extend into the meta-sedimentary country rocks. The exposed area represents only 40% of the granite hills and the known mineralization is open in all directions.
The Isaac target comprises multiple greisen zones ranging up to 500 metres in length and up to 50 metres in thickness, with an average grade of 0.54 % tin. The Irene target includes multiple zones of mineralization, with individual zones of up to 300 metres in length and up to 66 metres in thickness, with an average grade of 0.71 % tin. In outlining zones of mineralization a cut-off grade of 0.14 % tin and a minimum width of 4 metres (2 metres where the grade is over 1 % tin) was applied.
Irene Exploration Program & Channel Samples
The program comprised continuous channel sampling and detailed geological and alteration mapping of the target areas to define drill targets. Continuous channel sampling on the Irene Target has outlined 20-28 meter-wide zone extending for a strike-length of 200 meters. The new results are summarized in Table 1 below:
|
Table 1 – Main Serra de Irene Greisen Target |
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|
Sample line |
Interval (meters) |
Tin grade (% Sn) |
|
Line 9 |
28 |
0.36 |
|
Line 11 |
28 |
0.96 |
|
Line 12 |
20 |
3.29 |
|
Cut off 0.14% Sn, minimum width 4 meters and maximum internal waste 4 meters |
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Geological and alteration mapping show this zone to be open both to the northeast and southwest, where additional sample lines are being located to test grade and continuity of the system. The Irene Target also hosts several other zones of mineralization (including some with considerably higher grades) which are summarized in Table 2 below:
|
Table 2 – Other Serra de Irene Greisen Targets |
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|
Sample line |
Interval (meters) |
Tin grade (% Sn) |
|
Line 7 |
6 |
0.39 |
|
Line 8 |
8 |
1.57 |
|
|
20 |
0.59 |
|
|
10 |
0.23 |
|
|
4 |
0.18 |
|
Line 9 |
2 |
5.92 |
|
Line 10 |
14 |
0.25 |
|
|
6 |
0.25 |
|
|
4 |
0.19 |
|
|
6 |
0.26 |
|
|
6 |
1.52 |
|
Line 11 |
14 |
0.23 |
|
|
2 |
1.14 |
|
|
6 |
0.31 |
|
|
4 |
2.16 |
|
Line 12 |
6 |
0.20 |
|
|
2 |
4.69 |
|
|
6 |
0.18 |
|
|
4 |
0.30 |
|
Line 13 |
4 |
0.18 |
|
|
2 |
1.04 |
|
|
4 |
0.64 |
|
Line 14 |
8 |
1.53 |
|
|
2 |
3.53 |
|
Line 15 |
6 |
0.98 |
|
|
6 |
0.44 |
|
Line 16 |
2 |
8.46 |
The Company plans to continue sampling on the Irene Target to extend the known mineralized zones and define drill targets for testing the depth extensions of these systems. Follow-up sampling on the Isaac within the same granite body, are on-going and results will be reported when received.
Project Map and Location
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