Vancouver Roca Mines (ROK-V) has cut a gold-bearing zone down dip from the BRT massive sulphide showing on the Foremore property in northwestern British Columbia.
Partial assays are in for only one of the 11 holes put down on the property. Hole 11, which tested the stratigraphy immediately down dip and to the northeast along strike of the showing yielded 7.92 grams gold per tonne over 2.3 metres. The gold mineralization occurs in a 15.9 metre section of laminated, disseminated to semi-massive pyrite, with minor sphalerite and galena.
Assays for silver are still pending, as are the results for 10 additional drill holes.
The Foremore property is sandwiched between Barrick Gold‘s (ABX-T) Eskay Creek operation and SpectrumGold‘s recently acquired Galore Creek copper-gold porphyry deposit.
In its inaugural drill program, Roca put down four holes into the SG showing where mineralization is hosted in quartz-sericite altered intermediate to felsic volcanics. Grab samples returned up to 23.8% combined lead-zinc, plus 20.1 grams gold. Further prospecting 200 metres to the southeast lead to the discovery of the SG East zone. Here, stratiform mineralization is comprised of disseminated to massive pyrite, magnetite with minor chalcopyrite hosted in a limey argillite
The company drilled the remaining 7 holes some 3.5-km northeast into the BRT area where Roca discovered massive sulphide mineralization uphill from the North Boulder field. Samples collected from outcrop yielded an average of 10.2% zinc, 8.6% lead, 0.27% copper, 2.04 grams gold and 186.6 grams silver over 3 metres. The planar sulphide body is hosted in chlorite-sericite-pyrite schist that has been deformed into a 20-degree south to southeast plunging antiform. The zone, which lies at the transition between well-stratified deformed phyllitic sedimentary rocks and an overlying mafic volcanic package, occurs structurally and stratigraphically below the horizon that hosts the SG showing. The alteration at the BRT zone indicates a low sulphidation volcanic hosted massive sulphide type of mineralization. Gold values often exceed 2 grams, making the zone a likely candidate for precious metal enrichment with the gold showing a strong correlation with arsenic and not barite.
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