Read The Geology of the Corocoro Copper District of Bolivia - Joseph T. Singewald Jr. file in PDF
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The geology of the Corocoro copper district of Bolivia, by
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Arizona, colorado, new mexico, geological survey publications on coal, lignite, and peat.
The metallogenetic role played by the corocoro copper mine (la paz department, 8 of the society for geology applied to mineral deposits book series.
Copper is opaque, bright, and metallic salmon pink on freshly broken surfaces but soon turns dull brown. Copper crystals are uncommon, but when formed are either cubic or dodecahedral, often arranged in from bolivia, at corocoro.
Título, the geology of the corocoro copper district of bolivia edward wilber berry.
Copper mineralization is stratigraphically restricted to the upper 150 m of the sequence in conglomerates of predominantly granodioritic composition. The presence of mineralized clasts at this level indicates the erosion of bedrock mineralization.
(joseph theophilus), 1884-1963 berry, edward wilber, 1875-1945.
Two general types of deposits are recognized in the corocoro basin--deposits in channel-type depressions containing up to a few percent chalcocite, replacing fossil plant remains; deposits in structural highs, which may be either native copper (grades up to 5 or 10 percent) in reddish sandstones or chalcocite (up to 10 or 20 percent) in grayish sandstones.
The geology of the corocoro copper district of bolivia by joseph theophilus singewald, edward wilber berry.
Compre online the geology of the corocoro copper district of bolivia (volume 1), de geology, johns hopkins university.
Bolivia’s corocoro sediment-hosted copper mine has yielded fine large examples of copper pseudomorphs after euhedral aragonite crystals. The mine is one of the few copper-only producers in bolivia, and the production dates back to over a hundred years of mining (singewald and berry, 1922). The usgs mrds database lists the mine discovery as being 1540, but in truth native copper from the district was probably used by people in the aymara culture.
Corocoro, pacajes province, la paz, bolivia copper mining district centered around the town of corocoro. Mineralization is hosted in late oligocene poorly-consolidated sediments (sometimes considered to be miocene age).
Cretaceous rocks and those of the corocoro copper) and concentrating it into appropriate tec-.
An example of mineral-to-mineral substitution is replacement of aragonite twin crystals by native copper, as occurs at the corocoro united copper mines of coro coro.
Excerpt from the geology of the corocoro copper district of bolivia the city of corocoro is the capital of the province of pacajes of the department of la paz and has a population of about inhabitants, almost exclusively indian.
Industry experts describe how copper and minerals are deposited in areas that later become mines.
Copper (attractive locality specimen) corocoro district, pacajes province, la paz department.
Corocoro, pacajes province, la paz, bolivia copper mining district centered berry, edward (1922) the geology of the corocoro copper district of bolivia.
Geology -- bolivia corocoro, paleontology -- bolivia corocoro, copper mines and mining -- bolivia corocoro publisher baltimore the johns hopkins press collection cdl; americana digitizing sponsor msn contributor university of california libraries language english.
The precipitation of copper minerals followed authigenic formation of quartz, feldspar, analcime and calcite and also some secondary parosity generation. Copper minerals include the oxychloride atacamite, and the suphides bornite, digenite, djurleite and covellite.
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