Porphyry copper prospect in Sofija-Grad, Bulgaria

Names and other identifiers

Alternate names Studenec, Studenets
Tract name Transylvania-Balkan Mountains (150pCu6001)
Site status prospect

Geographic location

Country Bulgaria
State or province Sofija-Grad
Geographic location 23.416667, 42.483333
Geologic map unit 23.416667, 42.483333
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 76Ma
Age determination method unknown
Age range 77–75 Ma
Age reference Singer and others (2008)
Minerals anhydrite/gypsum, bornite, carbonate, chalcopyrite, chlorite, cobaltite, epidote, galena, kaolinite, magnetite, molybdenite, pyrite, sericite, sphalerite, tennantite, zeolite
Associated rocks monzodiorite porphyry, andesite, andesite tuff, diorite, granodiorite
Tectonic setting continental margin
Stratigraphic age Late Cretaceous

Commodity and development information

Development status Prospect
Major commodities Cu
Gold-Moly ratio -9999

Reference information

Comments Sofia district, Bulgaria. Dikes of granodiorite and monzodiorite porphyry intersect the Plana pluton, which intrudes Late Cretaceous volcanic rocks. Chalcopyrite and pyrite with inclusions of bornite, tennantite, molybdenite, and cobaltite.
Study area name Europe
References Bogdanov (1983); Bogdanov (1986); Singer and others (2008)
Site reference Sutphin and others (2013)
Bogdanov, B.D., 1983, Porphyry copper deposits of Bulgaria: International Geology Review, v. 25, no. 2, p. 178–188. (Also available at
Bogdanov, B.D., 1986, Copper ore deposits in Bulgaria, in Petraschek, W.E., and Jankovi?, S., eds., Geotectonic evolution and metallogeny of the Mediterranean area and western Asia: Wien, Springer-Verlag, Österreichische Akademie der Wissenschaften, Schriftenrehe der Erdwissenschaftlichen Kommissionen, v. 8, p. 103–112.
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