 | | Report (issue) | | contain varying amounts of chlorite, calcite, and epidote, which have 2.32–2.35-μm absorption features (Salisbury...Clark and others, 2007). In the thermal infrared region, quartz and hydrous silica contain emission minima...(sericite), magnetite, chlorite, anhydrite, and epidote. Other commonly occurring gangue minerals are rutile...(sericite), albite, anhydrite, chlorite, calcite, epidote, and kaolinite. In silicate-rich rocks that have...the most common minerals are garnet, pyroxene, epidote, quartz, actinolite, chlorite, biotite, calcite |  | Hodges, C.A., Cox, D.P., Singer, D.A., Case, J.E., Berger, B.R., Albers, J.P. (1984) U.S. Geological Survey-INGEOMINAS mineral resource assessment of Colombia. Open-File Report Vol. 1984 (84-345) US Geological Survey doi:10.3133/ofr84345 | Report (issue) | | sampling and geophysical surveying throughout the region, begun. The geologic environment of the shield...(oceanic). This zone, in the subsurface, separates the San Jacinto belt from the Sinu belt in the Tertiary basins...Central (Magdalena Valley), the Cordilleras Central and Occidental (Cauca-Patia Valley), the Cordillera...Cordillera Occidental and Serrania de Baudo (San Juan-Atrato Basin), the Serrania de Perija and Sierra Nevada de...percent of the deposits from the California-Oregon region in the United States contain 1,800 tonnes or more |  | | Report (issue) | | porphyry copper deposits in the Cascade geologic province. .... .j................. Estimates of metal endowment...the northern spotted owl in the Cascade geologic province (fig. 1) was assessed for tracts that are permissive...of the metal endowment of the Cascades geologic province entails three basic steps: (1) delineation of...porphyry copper deposits in the Cascade geologic province. Eight million metric tons of copper are present...44-51-20N 120-57-19W 47-29-40N Van Epps, Pickwick Mine 122-04-51W 121-46-OOW 47-09-40N 46-21-23N 121-18-22W |  | | Report (volume) | | 12201 Sunrise Valley Dr. SALT LAKE CITY, Utah--Federal Bldg., Rm. 8105,125 South State St. SAN FRANCISCO...and effective resource assessment of such a broad region required that grade-tonnage models be created for...shown conclusively that the classic Mississippi Valley-type ores cannot have originated from either syngenetic...based on considerations that extend far beyond the mine itself, in some instances relating to the overall...subject, as in a scale model of the workings of a mine, to a unifying concept that explains or describes |  | | Book | | Arqueo/6gicas y Museo. Unii·ersidad Cat6lica de! Norte, San Pedro Alacama. Chile V. Oliveros Departamento de...limestones. The central depression (zone 2), or Central Valley, is a c.Jownwarp with a Mesozoic to Quaternary...several major cities. In southern Chile the centrai valley is not recognized and the transition between the...so-called ·fiat slab' zone). where the Central Valley is also absent. The northern volcanoes a re builL...nitrates from the evaporitic deposits of the Atacama region was paramount). Because of its economic in1portance |
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