Bucium Tarnita

Porphyry copper (Cu-Au) deposit in Alba, Romania

Names and other identifiers

Alternate names Bucim
Tract name Apuseni Mountains (150pCu6003)
Site status deposit

Geographic location

Country Romania
State or province Alba
Geographic location 23.127, 46.242
Geologic map unit 23.127, 46.242
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age determination method Geologic inference
Age range Miocene
Age reference Singer and others (2008)
Minerals albite, carbonate, chalcopyrite, chlorite, hematite, pyrite, sericite
Associated rocks breccia, andesite porphyry, andesite, sandstone, conglomerate
Tectonic setting postconvergence
Stratigraphic age Miocene

Commodity and development information

Development status Producer
Major commodities Cu, Au
Tonnage (Mt) 335Mt
Cu grade (%) 0.5%
Au grade (g/t) 0.36g/t
Contained copper 1,700,000t
Gold-Moly ratio -9999

Reference information

Comments Bucim is a short distance south of Rosia Poieni Cu-Au porphyry and a similar distance southeast of the Rosia Montana Au-Ag project. Tarnita is a similar distance SSE of Bucim. Tarnita is hosted in quartz andesite that penetrates detrital sediments and volcanic rocks. The setting was subvolcanic. Bucium-Tarnita is a porphyry-copper system with high-sulfidation style epithermal overprint.
Study area name Europe
References Berbeleac, Iliescu and others (1995); Berbeleac, Popa and others (1995); Gabrielle Resources (2010); Ianovici and Borcos (1982); Ianovici and others (1977); Kouzmanov and others (2005); Singer and others (2008)
Site reference Sutphin and others (2013)
Berbeleac, Ion; Iliescu, Dan; Andrei, Justin; Ciuculescu, Ovidiu; and Ciuculescu, Rodica, 1995, Relationships between alterations, porphyry copper-gold and base metal-gold hydrothermal vein mineralizations in Tertiary intrusions, Talagiu area, Zarand Mountains: Romanian Journal of Mineral Deposits, v. 76, p. 31–39.
Berbeleac, Ion, Popa, T., Marian, I., Iliescu, D., and Costea, C., 1995b, Neogene porphyry copper-gold and gold-bearing epithermal deposits in South Apuseni Mountains, Romania, in Congress of the Carpatho-Balkan Geological Association, 15th, Athens, Greece, September 17–20, 1995, Proceedings: Athens, Geological Society of Greece Special Publication 4, p. 665–670.
Gabrielle Resources, 2010, Gabrielle Resources Web page: accessed September 14, 2011, at http://www.gabrielresources.com/prj-rosia.htm.
Ianovici, V., and Borcos, M., 1982, Romania, in Dunning, F. W., Mykura, W., and Slater, D., eds., Mineral deposits of Europe, Volume 2—Southeast Europe: London, Institution of Mining and Metallurgy, p. 55–142.
Ianovici, V., Vlad, ?., Borco?, M., and Bo?tinescu, S., 1977, Alpine porphyry copper mineralization of West Romania: Mineralium Deposita, v. 12, p. 307–317. (Also available at http://dx.doi.org/10.1007/BF00206169.)Kouzmanov, K., Iva??anu, P., and O'Connor, G., 2005, Porphyry Cu-Au and epithermal Au-Ag deposits in the southern Apuseni Mountains, Romania—Lat. 46°03? N, Long. 22°58? E: Ore Geology Reviews, v. 27, p. 46–47. (Also available at http://dx.doi.org/10.1016/j.oregeorev.2005.07.030.)Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at http://pubs.usgs.gov/of/2008/1155/.