... found in stockwork veinlets and random grains in the intrusive and surrounding fractures The ore includes chalcopyrite, pyrite, and sometimes molybdenite, magnetite, and gold Green and blue copper ... and many other minor minerals Alteration of the wallrock resulted in the formation of diopside and andradite in the central section, wollastone and tremolite in the outer, and marble in the peripheral ... locations in West Shasta, California and Crandon, Wisconsin The rocks are marine volcanogenic of felsic to intermediate composition and include copper- and zinc-bearing massive sulfides The ages of the...