On the Lucky Mike property, polymetallic skarn mineralization is associated with altered sections of Upper Triassic Nicola Group rocks. Calcareous volcanics, tuffs and limestone of this unit have been in part, converted to garnet-epidote- calcite skarn with associated copper, tungsten, silver and minor gold and zinc mineralization.
Recent drilling has indicated that tungsten mineralization is widespread in the garnet skarn while copper-zinc- gold-silver values tend to be restricted to late crosscutting structures.
The main skarn unit is over 110 metres long with a northeast strike. It occurs at the contact between epidotized andesitic breccias and intermediate to felsic crystal-lithic tuffs within a lens of limy volcanic rocks, lithic tuffs and limestone.
The skarn is bimodal in mineralogy, consisting of interfingering garnet skarn (andradite garnet, magnetite, epidote, hornblende, chlorite and calcite) and carbonate skarn (coarse calcite, epidote, hornblende, chlorite, minor magnetite or hematite) possibly reflecting original compositional variation (protolith-coarse, highly carbonated lithic tuffs(?). Numerous late, fairly wide, east dipping (30-50 degrees) fracture zones cut the skarn with local displacements. A major fault zone is evident in the hangingwall lithic tuffs.
Tungsten mineralization is confined to the bimodal skarn with fine to coarse disseminated scheelite.
A drill hole intersection across 14.1 metres of skarn mineralization assayed 0.152 per cent tungsten.
A diamond-drill hole intersection across 3.6 metres assayed 0.18 per cent copper and 38.39 grams per tonne silver.
Geologic reserves to date at the Lucky Mike copper-tungsten skarn deposit are estimated at: 317, 485 tonnes grading 0.56 per cent copper, 0.30 per cent WO3 (0.23 per cent W) and 20.5 grams per tonne silver.
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