Tsar Assen

Porphyry copper deposit in Pazardzhik, Bulgaria

Names and other identifiers

Alternate names Tsar Asen
Tract name Transylvania-Balkan Mountains (150pCu6001)
Site status deposit

Geographic location

Country Bulgaria
State or province Pazardzhik
Geographic location 24.339167, 42.355278
Geologic map unit 24.339167, 42.355278
Nearby data

Geologic information

Deposit type Porphyry copper
Age determination method Geologic inference
Age range Late Cretaceous
Age reference Singer and others (2008)
Minerals adularia, albite, alunite, anhydrite/gypsum, azurite/malachite, biotite, bornite, carbonate, chalcocite, chalcopyrite, chlorite, cobaltite, electrum, enargite, epidote, galena, gold, hematite, kaolinite, linneite, magnetite, millerite, molybdenite, pyrite, sericite, sphalerite, tennantite, zeolite
Associated rocks dacite porphyry, granodiorite porphyry, dacite, granite, granodiorite, quartz monzodiorite, tuff, andesite, hornfels, pyroclastics
Tectonic setting continental margin
Stratigraphic age Late Cretaceous

Commodity and development information

Development status Past Producer
Major commodities Cu
Tonnage (Mt) 7Mt
Cu grade (%) 0.47%
Contained copper 31,000t
Gold-Moly ratio -9999

Reference information

Comments Mined out 1980-1995. In concentrate:95 ppb Au, 51 ppb Pt, 8 ppb Pd. Exposed.
Study area name Europe
References Bogdanov (1983); Bogdanov (1986); Ciobanu and others (2002); Eliopoulos and others (1995); Ignatovski (1996); Strashimirov and others (2002); Strashimirov and Popov (2000); Tarkian and Stribrny (1999); von Quadt, Moritz and others (2005); von Quadt, Peytcheva and others (2005); 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 http://dx.doi.org/10.1080/00206818309466690.)
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.
Ciobanu, C.L., Cook, N.J., and Stein, Holly, 2002, Regional setting and geochronology of the Late Cretaceous Banatitic magmatic and metallogenetic belt: Mineralium Deposita, v. 37, p. 541–567. (Also available at http://dx.doi.org/10.1007/s00126-002-0272-9.)
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.
Ignatovski, P., 1996, The zonal pattern of Tzar Assen intrusion-centered ore system, in Popov, P., ed., Plate tectonic aspects of the Alpine metallogeny in the Carpatho-Balkan region: UNESCO-IGCP Project No. 356 Annual Meeting, Sofia [Proceedings], v. 1, p. 197–199.
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/.Strashimirov, Strashimir; Petrunov, Rumen; and Kanazirski, Milko, 2002, Porphyry-copper mineralization in the central Srednegorie zone, Bulgaria: Mineralium Deposita, v. 37, p. 587–598. (Also available at http://dx.doi.org/10.1007/s00126-002-0275-6.)
Strashimirov, S., and Popov, P., eds., 2000, Geology and metallogeny of the Panagyuriste ore region (Srednogorie zone, Bulgaria): Sofia, Publishing House St. Ivan Rilski, Geodynamics and Ore Deposit Evolution of the Alpine-Balkan-Carpathian-Dinaride region (ABCD-GEODE) Workshop, Borovets, Bulgaria, 2000, Excursion Guide (A and B), 50 p.
Tarkian, 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 http://dx.doi.org/10.1007/BF01161959.)von Quadt, Albrecht; Moritz, Robert; Peytcheva, Irena; and Heinrich, C.A., 2005, Geochronology and geodynamics of Late Cretaceous magmatism and Cu-Au mineralization in the Panagyurishte region of the Apuseni-Banat-Timok-Srednogorie belt, Bulgaria: Ore Geology Reviews, v. 27, p. 95–126. (Also available at http://dx.doi.org/10.1016/j.oregeorev.2005.07.024.)von Quadt, A., Peytcheva, I., Fanger, L., and Heinrich, C., 2005, The Elatsite porphyry Cu-Au deposit, Bulgaria—Ore deposit—Lat. 42° 45? N, Long. 24° 02? E: Ore Geology Reviews, v. 27, p. 128–129. (Also available at http://dx.doi.org/10.1016/j.oregeorev.2005.07.022.)