23-1-013: intensely altered volcanic - Summitville District - Summitville Mine

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Specimen Number23-1-013CommentsFrom Crowe research collection. Interesting sample, altered quartz-feldspar porphyry, feldspars replaced by clay. Matrix has faint purple cast, xrd shows no fluorite but sure looks like that's what's happening here...In Teaching CollectionNoMineral(s)clayquartzRock Nameintensely altered volcanicDistrictSummitvilleMineSummitvilleExternal 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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23-1-013: intensely altered volcanic - Summitville District - Summitville Mine