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Abstract

During 1983, one hundred-sixteen samples were collected at the Bell Ranch prospect and analyzed for major elements plus zirconium, gold, silver, arsenic, antimony, mercury, copper, lead, and zinc. Thirty-eight samples were collected from rocks interpreted to have a felsic volcanic protolith. These geochemical data are part of a regional study of Early Proterozoic hydrothermal systems associated with strata-bound mineralization. The regional study includes lithologic and alteration mapping as well as analysis of more than 1,300 geochemical samples from eleven properties. The original purpose of the study was to classify polymetallic massive sulfide types empirically and to derive generative models of the hydrothermal-geological environment associated with mineralization. During 1983, two gold-bearing, base-metal-poor hydrothermal systems were included in the database.

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