Underground drilling by Swedish miner
The holes, sunk from the 900-metre level, aimed at the 850- and 1,400-metre levels. Holes from the surface were designed to test the 500-600-metre levels.
Drill results indicate “mineralization of considerable size,” says Boliden President Jan Johansson.
Highlighting results from underground drilling is an 11.45-metre section grading 2.1 grams gold and 198 grams silver per tonne, plus 0.13% copper, 9.1% zinc and 6% lead.
A surface hole returned intervals ranging between 7 and 34 metres from 614 to 814 metres below surface. Gold grades are typically less than 0.5 gram gold, silver runs 51 to 359 grams, zinc, 4.1 to 7.9%, and lead, 1 to 3.3%. Copper grades were not available.
The average grades run higher than those of the reserves at the company’s operating Garpenberg mine. Dubbed Lappberget, the area is between the Garpenberg and Garpenberg Norra mines and is covered by an exploration permit. It also lies within the 1-km protection zone around the two mines’ existing exploitation concessions.
Remaining proven reserves at Boliden’s Grapenberg mine average 0.4 gram gold, 143 grams silver, 0.1% copper, 3.7% zinc and 1.9% lead.
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