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MINE PRODUCTION lJ5
OXIDATION AND ENRICHMENT
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andesitic argentiferous galena argentite argillite arsenopyrite average barite breccias calcite Cambrian Canyon carbonate cavity-filled ceragyrite cerussite chalcocite chalcopyrite contained copper County Creek dacitic dikes discovered disseminated district located dolomite estimated feet wide fissures foot wide veins fractures galena gangue Gangue minerals gold and silver gold-silver granodiorite Gulch high-grade Hill Host rocks intruded Lake largest producer largest silver Leadville limestones limonite massive sulfide miles north miles northeast miles south miles southwest miles west million oz million tons grading minerals reported mines located Mountain native gold native silver northwest occur one-half miles openpit oxidized zone Plate polybasite porphyry Precambrian proustite pyragyrite pyrite pyrrhotite quartz veins quartzites recorded production recovered from mines replacement orebodies rhyolite rich silver schists sericitized shales siliceous silicified silver minerals silver production silver were recovered silver-gold silver-lead southeast sphalerite tennantite tetrahedrite three miles Tintic tpd mill tuffs wall rock zinc