Abstract
Abstract The mineralization of Diois and Baronnies (France) is examined on the individual specimen, bed, and regional levels. The mineral composition consists essentially of zinc blende, galena and pyrite with some marcasite in a calcitic gangue. Study of galena and calcite samples indicates a low temperature of deposition. Three phases of mineral concentration are hypothesized; precipitation of water-dissolved metallic ions by hydrosulfuric acid; upper Eocene deposition of lead and zinc concentrations along faults by ground water; and upper Miocene to Recent superficial alteration of the beds.
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