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Blackheath Resources Inc. (TSX:BHR) reported results from its diamond drilling program, as well as previously unreported historical reserve estimates, from the Vale das Gatas Tungsten Mine in Portugal.
Blackheath Resources Inc. (TSX:BHR) reported results from its diamond drilling program, as well as previously unreported historical reserve estimates, from the Vale das Gatas Tungsten Mine in Portugal. Highlights from the work program include an underground sample of stockwork totalling 11 metres averaging 2.09% WO3 (tungsten trioxide).
As quoted in the press release:
The permit area includes the historic Vale das Gatas Tungsten Mine, the second largest past producer of tungsten in Portugal, which closed in 1986 as a result of low tungsten prices, and also an undeveloped mineralized zone, the Prainelas Sector, to the south, where Blackheath has focussed on a programme of surface and underground mapping and sampling. Prainelas hosts multiple, closely spaced, parallel sub-vertical mineralized veins with evidence of narrow, but high grade, wolframite (tungsten) mineralization and additional silver values. Assays of selected samples, which may not be representative of average values, taken across the vein from underground exploration adits on two of these veins, Brasileira and Santa Rita, are given below together with results taken along the vein from stockwork samples at Santa Rita:
Multiple, closely-spaced mineralized veins have been identified at Prainelas and a drill program of five diamond drill holes is planned to test the potential for bulk mining.
Historic Reserves and Resources
During the most recent work program at Vale das Gatas, Blackheath reviewed a historical mining reserve estimate reported by the Ministry of Industry and Energy of the Government of Portugal in 1991. Included in the report are detailed historical resource blocks originally described as of both proven and probable mineralization.
Mineralization is present in a multiple clusters of veins that are mainly shallowly dipping to the south. The property has several such clusters named Vale das Gatas (Mine A, Mine B, Rebolais and Vinhheiros) and Prainelas (Prainelas, Santa Rita, and Brasileira) to the south, all of which have been explored by underground workings and some of which are flooded at depth. At Vale das Gatas, on one of the veins, Vein A, in the area between Mine A and Rebolais, historical “Reserves” containing tungsten, tin and silver were described in 1991 and are outlined below:
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