13-4-012: altered rhyolite - Summitville District - Summitville Mine

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Specimen Number13-4-012Commentsfrom Crowe research collection; strongly altered, both argillically and by alunite replacing feldspars; half feldspars are replaced by clay, half by alunite.In Teaching CollectionNoMineral(s)alunitekaolinitequartzField Notesfrom mine highwallRock Namealtered rhyoliteDistrictSummitvilleMineSummitvilleExternal LinkMindatDeposit TypeEpithermal High SulfidationGeo-Coords^[1]Reference MaterialACL-126: Lipman, P.W., Bethke, P.M., and Casadevall, T.J., 1982, Field Trip Guide, Relationship of Mineralization to Volcanic Evolution of the San Juan Mountains, Colorado, SEG Field Conference, September 19-24, 1982, 59p.

ACL-178: Davis, G. H., and VandenDolder, E.M., 1987, Geologic Diversity of Arizona and Its Margins: Excursions to Choice Areas; Ariz. Bur. Geol. and Min. Tech. Special Paper No. 5, Tucson, Arizona, 422 p.

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13-4-012: altered rhyolite - Summitville District - Summitville Mine

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13-4-012: altered rhyolite - Summitville District - Summitville Mine