GMRAP ID | 184 |
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Tract name | Southern California Batholith (003pCu3001x) |
Site status | deposit |
Country | Mexico |
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State or province | Baja California |
Geographic location | -113.396892972, 28.032788298 |
Geologic map unit | -113.396892972, 28.032788298 |
Nearby data |
Deposit type | Porphyry copper |
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Age (Ma) | 164.1Ma |
Age determination method | Re-Os molybdenite |
Age range | 164.6–163.8 Ma |
Age reference | Valencia, Barra and others (2006) |
Minerals | apatite, azurite/malachite, biotite, carbonate, chalcocite/digenite, chalcopyrite, chlorite, chrysocolla, copper, copper wad, covellite, cuprite, dioptase, epidote, goethite/limonite, galena, gold, kaolinite, molybdenite, pyrite, sericite, sphalerite |
Associated rocks | granodiorite, quartz monzonite, andesite breccia, andesite porphyry, aplite, diabase dikes, granodiorite porphyry |
Tectonic setting | island arc |
Stratigraphic age | Middle Jurassic |
Development status | Prospect |
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Major commodities | Cu, Au |
Tonnage (Mt) | 1,016Mt |
Cu grade (%) | 0.518% |
Au grade (g/t) | 0.12g/t |
Contained copper | 5,260,000t |
Gold-Moly ratio | -9999 |
Comments | According to Southern Copper Corp. (2006, 2007), resources contain 846 Mt of sulfide ore and 170 Mt of leaching ore. Covered by Quaternary sand and gravel. Post-ore Albian metamorphism (~95 Ma, Ar-Ar). Mine is slated to begin production in 2012 (Daniel, 2007). Location based on Servicio Geológico Mexicano 1:250,000-scale Isla San Estaban Map H12-10; recent zircon and molybdenite ages show age to be Jurassic; K-Ar ages from the porphyry stock range from 94 to 107 Ma are now interpreted as thermally reset by emplacement of Peninsular Ranges batholith. |
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Study area name | Mexico |
References | Daniel (2007); Romero-Rojas and others (1998); Singer and others (2008); Valencia, Barra and others (2006); Valencia-Moreno and others (2007); Weber and Lopez-Martinez (2006); Singer and others (2008); U.S. Geological Survey (2007); Southern Copper Corp. (2006); Southern Copper Corp. (2007) |
Site reference | Hammarstrom and others (2010) |