02113oam 2200505 450 991070961920332120180612085315.0(CKB)5470000002472048(OCoLC)896811188(OCoLC)995470000002472048(EXLCZ)99547000000247204820141123d1993 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierMineralogy, mineral chemistry, and paragenesis of gold, silver, and base-metal ores of the North Amethyst vein system, San Juan Mountains, Mineral County, Colorado /by Nora K. Foley [and three others]Washington :U.S. Department of the Interior, U.S. Geological Survey,1993.1 online resource (iv, 39 pages) illustrations, mapsU.S. Geological Survey professional paper ;1537"A study of progressive vein-related mineralization of structures in volcanic rocks of the San Luis and Bachelor calderas of the San Juan volcanic field of southwestern Colorado and its bearing on the economic potential of the area."Includes bibliographical references (pages 37-39).Gold oresGeologyColoradoMineral CountyOre depositsColoradoMineral CountyOre depositsSan Juan Mountains (Colo. and N.M.)Gold oresGeologyfastOre depositsfastColoradoMineral CountyfastGold oresGeologyOre depositsOre depositsGold oresGeology.Ore deposits.Foley N. K.1391520Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910709619203321Mineralogy, mineral chemistry, and paragenesis of gold, silver, and base-metal ores of the North Amethyst vein system, San Juan Mountains, Mineral County, Colorado3445365UNINA