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): |
San Francisco; La Casualidad-San Francisco |
Political location(s): |
Bolivia; Province or state: La Paz; Nearest community: Siempre Adelante Mine |
Deposit clan (type): |
sediment-hosted copper |
Deposit (sub) types: |
continental redbed; chalcocite, covellite, malachite and azurite replacing organic matter in sandstone |
Geologic province: |
Altiplano |
Geologic subprovince: |
Ulloma Domain |
Commodities: |
Cu |
Geological ages: |
Miocene (host rocks) |
Tectonic setting: |
continental basin-foreland; transpressive (host rocks) |
Coincident features: |
organic matter |
Regional tectonic structure: |
anticline (west flank) regional faulting (northwest-striking reverse fault) |
Host rocks: |
(1) sedimentary; sandstone-conglomerateHost rock stratigraphy: | Huayllamarca Formation |
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Qualified comments: |
(Applies to: miscellaneous comments) chalcocite, covellite, malachite and azurite replacing organic matter in sandstone; lenses 0.9 to 1.9 m thick; west flank of anticline near a nw-trending reverse fault |
References: |
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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Associated mine(s): |
San Francisco Mine (53) |
Associated group(s): |
San Sylvestre Area (6) |