Drilling by Black Swan Gold Mines (BSW-T) at its Cata Preta gold prospect in Brazil’s Minas Gerais state, continues to return encouraging values.
Trending in a northeast-to-southwestly direction over an estimated strike length of 6 km, the mineralization is hosted in a belt of manganiferous ironstone, underlain by a sedimentary rock sequence consisting mainly of banded ironstones.
The current program is attempting to extend the belt of manganiferous ironstone by stepping out, to the southwest, from hole D21A, which intersected 49 metres grading 29.34 grams gold per tonne.
In August, hole D23D-1, drilled 50 metres south of D21A, intersected 28.35 metres grading 2.66 grams gold, including 8.45 metres of 5.87 grams.
Also, results from hole D19, drilled 75 metres southwest of D21A, have been revised to 69.07 metres grading 2.85 grams gold.
The Vancouver-based company has also received results from hole 33, drilled about 265 metres southwest of D21A. Ore-grade mineralization was intersected between 26.14 and 40.41 metres below surface. The average uncut grade of the 14.27-metre intersection is 6.05 grams gold, including 3.66 metres grading 16.18 grams.
The strike length has been extended, through drilling, to 570 metres.
“The results significantly exceed Black Swan’s target exploration requirements, which are aimed at establishing gold reserves that are open-pittable with good mining widths,” the company says.
“The area has good access,” explains spokesman Richard Simpson. “It is lightly forested, hilly savannah country with a long history of mining.” Black Swan has been drilling at the property since January and recently added a fifth rig.
The mineralization appears to extend in a fairly continuous band, dipping to the east. Several holes, particularly those drilled near the western edge where the band approaches surface, encountered old pit workings and rubble.
Black Swan plans to test the mineralization’s northeast and southeast extensions, as well as its eastern downdip extension. At least one deeper hole is planned to test the mineralization in the underlying rock sequence.
Results from several more holes are pending, and a second laboratory has been contracted.
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