Database name: |
World Sediment-Hosted Cu Deposits |
Compilers: |
R. V. Kirkham, J. J. Carriere, A. Rafer, and P. Born |
Release date: |
2015-01-27 |
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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 |
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Production data: |
Report period: from 1956 until 1964; 630 metric ton ore; Provisional entry?: yes; Yearly or summary?: SGrade-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) |