Bajo de la Alumbrera

Porphyry copper (Cu-Au) deposit in Catamarca, Argentina

Names and other identifiers

Tract name Argentina Miocene–Pliocene Bajo de la Alumbrera (005pCu1014c)
Site status deposit

Geographic location

Country Argentina
State or province Catamarca
Geographic location -66.608888889, -27.329722222
Geologic map unit -66.608888889, -27.329722222
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 7.5Ma
Age determination method unknown
Age range 8.02 ±0.14 to 6.75 ±0.09 Ma
Age reference Singer and others (2008)
Minerals anhydrite/gypsum, apatite, biotite, bornite, chalcocite/digenite, chalcopyrite, chlorite, covellite, epidote, galena, goethite/limonite, gold, hematite/specularite, jarosite, kaolinite/dickite, magnetite, molybdenite, pyrite, sericite, siderite, sphalerite
Associated rocks dacite porphyry, quartz-feldspar porphyry,granite, schist, gneiss,andesite, andesite breccia, conglomerate (block and ash flow deposit), sandstone, tuff
Tectonic setting continental margin
Stratigraphic age Miocene

Commodity and development information

Development status Producer
Major commodities Cu, Au, Ag
Minor commodities Pt, Pd
Tonnage (Mt) 806Mt
Cu grade (%) 0.53%
Au grade (g/t) 0.64g/t
Ag grade (g/t) 2.5g/t
Contained copper 4,300,000t
Gold-Moly ratio -9999

Reference information

Comments 1999 resources: 767 Mt at 0.51% Cu and 0.64 g/t Au. In concentrate: 8 ppb Pt; 35 ppb Pd. Exposed. Farallon Negro volcanic region.
Study area name Andes
References Angera (1999); Brown (2005); Casaceli (1993); Guilbert (1995); Guilbert (2000); Harris and others (2006); Muller and Forrestal (1998); Proffett (2003); Sasso and Clark (1998); Sillitoe (1981); Tarkian and Stribrny (1999); Ulrich and Heinrich (2001); Ulrich and others (2001); Singer and others (2008)
Site reference Cunningham and others (2008)