Overburden Drilling Management Limited

Drilling at Silver Spruce Resources' Centauro gold-silver project, in northern Mexico's Chihuahua state. After reporting bonanza silver grades last year from Centauro, check-assays determined that decaying silver solder in drill bits was contaminating some of the company's drill results.

Silver Spruce And The ‘Silver Bonanza’ Puzzle

Silver Spruce Resources (SSE-V, SSEBF-O) has learned through experience in Mexico that silver solder is routinely used in diamond drill bits and that destruction of these bits, especially if water cir…



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