GeoFile 2004-6: Platinum Group Elements in Alkaline Cu-Au Porphyry
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Alkali intrusions of Late Triassic to Early Jurassic age are important hosts to porphyry style Cu-Au-Ag+/-PGE mineralization in British Columbia. The main deposits are in Stikine and Quesnel terranes. Their economic potential is currently being explored as the PGE tenor and distribution are better understood. Seven samples from each of Afton, Lorraine, Copper Mountain, Friday Creek, Sappho, and Maple Leaf were analysed. It was found that much PGE is in solid solution in sulphides, that pyrite may be relatively enriched compared to copper sulphide mineral solid solutions (may carry up to 42 ppm Pd) and another part of the PGE budget is in discrete PGE telluride, antimonide, and arsenide minerals.
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