ABSTRACT: Evidence of westward glacial dispersal along a till geochemical transect of the Copper Star Cu±Mo±Au occurrence, west-central British Columbia.

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Abstract

A 2.5 km east-west geochemical sampling transect over the Copper Star porphyry occurrence in an area of a known ice-flow reversal reveals evidence for dominantly westward (locally 290°) glacial dispersal. The highest Cu (686.1 ppm) and Mo (4.98 ppm) values in the till transect occur directly west of the occurrence and generally decrease westward. The second highest Cu value (194.78 ppm), however, occurs in till directly east of the occurrence suggesting that a component of eastward dispersal also occurred. These observations are consistent with the ice-flow model for the area that predicts both eastward and westward dispersal. Dispersal distance from the mineral occurrence to the highest Cu concentration in till is short, probably reflecting the shallow till depth (<1 m) at the occurrence. In addition, elevated Au and Ag at two sites at the east end of the transect suggests potential precious metal mineralization in that area.

Bibliography of Canadian Geomorphology