British Columbia. Ministry of Employment and Investment

British Columbia. Geological Survey Branch

Trygve Höy

Kathryn P. E. Dunne

The Rossland Group in south-eastern British Columbia comprises intermediate to mafic volcanic rocks and associated clastic rocks of Lower Jurassic age. The Group hosts a variety of gold and silver deposits and continues to be a target of mineral exploration. The purpose of the study reported is to develop a better understanding of the nature, timing, and controls of mineralization in the Group, particularly the intrusion-related gold-copper veins in the Rossland camp. The report describes the Rossland Group stratigraphy, its paleotectonic setting, and associated intrusions. It summarizes the structure of the Rossland Group area and presents a tectonic model for the Group. Information is also included on the regional geologic setting and the geochemistry of the Elise Formation and plutonic rocks.

Early Jurassic Rossland Group, Southern British Columbia

British Columbia. Ministry of Energy and Mines

Janet Elizabeth Gabites

The Jurassic Rossland Group in south-east British Columbia is a volcanic arc succession that contains a variety of deposits typical of volcanic arcs. This report focusses on deposits in the Group, particularly on those that have had recent exploration, and on the metallogeny of the Nelson-Rossland map area. The report first reviews the regional geology of the area and describes a number of type examples of mineral deposits in Rossland Group rocks & others in the area. These include carbonate-hosted deposits, volcanogenic massive sulphides, porphyry copper-gold deposits, skarns, and gold-quartz & polymetallic veins. The principal focus is on the deposits of the Rossland copper/gold mining camp, the second largest lode gold producing camp in the province. The regional geology around Rossland is summarized, the main deposit types are described, and a model for intrusive-related gold-sulphide veins is presented. Appendices include a table of mineral occurrences in the area, production data for the area's metallic deposits, a petrographic report, analyses of samples, reports on geochronological dating & isotope characterization, and fluid inclusion data.

Kathryn P. E. Dunne

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