CANADIAN AND WORLD MINERAL DEPOSIT DATABASES
Geological Survey of Canada


 
Database name: World Sediment-Hosted Cu Deposits
Compilers: R. V. Kirkham, J. J. Carriere, A. Rafer, and P. Born
Release date: 2015-01-27
   
Deposit name(s): La Encontrada
Longitude / Latitude: -68.23333 / -17.56667
Political location(s): Bolivia; Province or state: La Paz; Nearest community: Chacarilla
Deposit clan (type): sediment-hosted copper
Deposit (sub) types: continental redbed; chalcocite, malachite and azurite mineralization in mantos hosted by tertiary sandstone
Geologic province: Altiplano
Commodities: Cu
Mineralization styles: stratabound replacement
Geological ages: Tertiary (host rocks)
Tectonic setting: continental basin-foreland; transpressive (host rocks)
Regional tectonic structure: diapirs (Chuquichambi Formation in core and Huayllamarca Formation in mantle)
Host rocks: (1) sedimentary; sandstone
Qualified comments: (Applies to: miscellaneous comments) chalcocite, malachite and azurite mineralization in mantos hosted by Tertiary sandstone; mantos with copper mineralization strike 142-165 degres and dip 25-32 SW on the W flank of a NW-striking anticline
References:
Cox, D. P.; Carrasco, R.; André-Tamos, O.; Hinojosa-Velasco, A.; Long, K. R., 1992
Copper Deposits in Sedimentary Rocks
Section Geology of Known Mineral Deposits, in Geology and Mineral Resources of the Altiplano and Cordillera Occidental, Bolivia, Edited by United States Geological Survey; Servicio Geologico de Bolivia, Bulletin, U.S. Geological Survey, 1975, 365 p., 8 maps, p. 95 - 108

Long, K. R., 1992
Mines, Prospects, and Mineral Occurrences, Altiplano and Cordillera Occidental, Bolivia
Appendix A, in Geology and Mineral Resources of the Altiplano and Cordillera Occidental, Bolivia, Edited by United States Geological Survey; Servicio Geologico de Bolivia, Bulletin, U.S. Geological Survey, 1975, 365 p., 8 maps, p. 244 - 272

Richter, D. H.; Luddington, S.; Soria-Escalante, E., 1992
Geological Setting
in Geology and Mineral Resources of the Altiplano and Cordillera Occidental, Bolivia, Edited by United States Geological Survey; Servicio Geologico de Bolivia, Bulletin, U.S. Geological Survey, 1975, 365 p., 8 maps, p. 14 - 24

Production data: Report period: from 1956 until 1964; 630 metric ton ore; Provisional entry?: yes; Yearly or summary?: S
Grade-commodity information:Cu: 25 percent
Reference: Cox, D. P.; Carrasco, R.; André-Tamos, O.; Hinojosa-Velasco, A.; Long, K. R., 1992: Copper Deposits in Sedimentary Rocks; Section Geology of Known Mineral Deposits, in Geology and Mineral Resources of the Altiplano and Cordillera Occidental, Bolivia, Edited by United States Geological Survey; Servicio Geologico de Bolivia, Bulletin, U.S. Geological Survey, 1975, 365 p., 8 maps, p. 95 - 108
Percent weights allocated to deposit: 100.0%
Associated mine(s): La Encontrada Mine (56)

Generated 2015-01-27 17:26:33 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
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