Abstract

Copper-sulfide veins occur primarily in feldspathic schists and soda granites of migmatitic origin and to a lesser extent in contiguous epidiorite and quartzite. Chalcopyrite is the dominant mineral followed by pyrite and pyrrhotite. Other minerals include pentlandite, violarite, valeriite, skutterudite, tellurobismuthite, sphalerite, and molybdenite. The veins are concentrated in a narrow zone with great linear extent, and are aligned parallel to cleavage. Migmatization was syntectonic to post-tectonic, and mineralization occurred during its end stages. The distribution of trace elements in the complex suite of sulfides is similar to that in the host rocks, suggesting a genetic relationship between sulfides and migmatizing solution.

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