Hinterland Metals Inc. (CVE:HMI) has staked 175 claim units in four blocks based in the Gowganda region of north-eastern Ontario. This place of interest, Gowganda, is based northwest of the Cobalt silver-cobalt site. The silver-cobalt mineralization seen at Gowganda is matching to that seen at Cobalt.
From 1910 to 1989, Gowganda manufactured 1.4-million pounds of cobalt and 60.1-million ounces of silver representing 6% of the total cobalt and 11% of the total silver grant of the Cobalt-Gowganda site. Output was from 10 distinct mines with the Miller-O’Brien mine being the largest, with total production of 0.8-million-pound cobalt and 38.0-million-ounce silver. The claim blocks ventured do not comprise areas of previous production.
Gowganda silver-cobalt deposits happen within fracture-fill form carbonate veins that comprise a broad range of minerals counting combinations of arsenic-antimony-sulphur, cobalt-iron-nickel and minor amounts of galena and chalcopyrite.
Traditionally cobalt was an ancillary item of the silver mining. The veins happen within Nipissing Gabbro sills that have interrupted Archean metavolcanic rocks which are overlain by meta-sedimentary rocks of the Coleman Associate of the Gowganda Formation. The veins incline to be vertical to sub-vertical, somewhat discontinuous and narrow, but extremely high-grade. The staking was intended to cover mineral occurrences shown in the Ontario Mineral Deposits Record database and potential Nipissing Gabbro sills.
Out of the four claim blocks, Morel block covers the Solid Silver and Bloom Lake occurrences, and a short part of a Nipissing Gabbro sill. A reading of 411g per t Ag is noted from an exclusive surface grab sample occupied at Solid Silver. Figures ranging from 219 to 603g per t Ag, 0.3 to 0.9% Co and 11 to 14.7% Cu are noted from four surface grab examples full at Bloom Lake. Preceding underground exploration effort at Bloom Lake comprises a shaft and numerous adits.