Project: Paragenesis, Mineralization and Alteration of the East Zone at the Red Chris Cu-Au Porphyry Deposit, Northwestern British Columbia
The Red Chris Cu-Au porphyry deposit is located in northwestern British Columbia near the northern extent of the Stikinia terrane. This silica-saturated alkalic porphyry contains several generations of carbonate material, an unusual occurrence in such a deposit. In 2007 Imperial Metals Corp. conducted a deep drilling program to examine the deposit down to 1 km depth. Drill hole RC07-335, a vertical, 1029 m deep hole intersected 1.02% Cu, 1.26 g/t Au and 3.92 g/t Ag over the length of the hole. This indicated that significant ore mineralization was located at previously untested depths, beneath the original ore-model. The scope of the study at Red Chris is to define the evolution of the East Zone, involving the paragenesis, mineralization and alteration. Mineralization at Red Chris is hosted within quartz stockworks and veins dominantly as chalcopyrite and bornite. Gold mineralization occurs as microscopic inclusions within the copper-sulphides. The K-silicate altered core has been highly overprinted by later illite-kaolinite+/-sericite+/-chlorite+/- carbonate alteration assemblages. The main objective of this study is to examine the relationship between mineralization and alteration assemblages at the deposit with the goal of developing and applying exploration vectors to find similar deposits in the region.