Porphyry copper deposit in Yambol, Bulgaria

Names and other identifiers

Tract name Transylvania-Balkan Mountains (150pCu6001)
Site status deposit

Geographic location

Country Bulgaria
State or province Yambol
Geographic location 26.262883, 42.378348
Geologic map unit 26.262883, 42.378348
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 81Ma
Age determination method unknown
Age range 81 Ma
Age reference Singer and others (2008)
Minerals anhydrite/gypsum, biotite, bornite, carbonate, chalcopyrite, chlorite, cobaltite, epidote, fluorite, galena, garnet, kaolinite, hematite/specularite, magnetite, molybdenite, sericite, pyrite, pyroxene, pyrrhotite, sphalerite, tennantite, zeolite
Associated rocks diorite, diorite porphyry, hornfels, skarn, andesite, agglomerate, diabase, granite, phyllite, conglomerate, granodiorite, limestone, marble, quartz diorite, quartz monzonite, quartz syenodiorite, rhyolite tuff, sandstone, shale
Tectonic setting continental margin
Stratigraphic age Late Cretaceous

Commodity and development information

Development status Producer
Major commodities Cu
Tonnage (Mt) 249Mt
Cu grade (%) 0.25%
Mo grade (%) 0.005%
Contained copper 620,000t
Gold-Moly ratio -9999

Reference information

Comments In concentrate: 26 to 200 ppb Au (Pt and Pd). Resources are 11 Mt at 0.22% Cu. Surface workings footprint about 1 square km.
Study area name Europe
References Bogdanov (1983); Bogdanov (1986); Eliopoulos and others (1995); Tarkian and Stribrny (1999); Lips and others (2006); Nakov and others (2002); 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.
Eliopoulos, D.G., Economou-Eliopoulos, M., Strashimirov, S., Kovachev, V., and Zhelyskova-Panayotova, M., 1995, Gold, platinum and palladium content in Cu-deposits from Bulgaria—A study in progress 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. 712–716.
Lips, A.L.W., Bouchot, V., Deschamps, Y., Leistel, J-M., Picot, J-C., and other BRGM colleagues, 2006, A review of non-ferrous mineral deposits of Europe—Finalized initial database on primary and secondary resources for biotechnological metal extraction: BRGM, BioMinE Integrated Project (FP6 IP 500239), Deliverable DI.3 - Final Report, BRGM/RP-54957-FR, 124 p. (Abstract also available at, Radoslav; Kerestedjian, Thomas; and Kunov, Angel, 2002, The Silistar Intrusive, eastern Srednogorie Zone, Bulgaria—Structural data and potential for porphyry copper and epithermal systems: Turkish Journal of Earth Sciences, v. 11, p. 217–229. (Also available at, 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, M., and Stribrny, B., 1999, Platinum-group elements in porphyry copper deposits—A reconnaissance study: Mineralogy and Petrology, v. 65, p. 161–183. (Also available at