MINERAL ASSEMBLAGES AND GENESIS OF THE Cu-Au EPITHERMAL DEPOSITS IN THE SOUTHERN PART OF THE PANAGUYRISHTE ORE DISTRICT, BULGARIA

PDF (English)
Publiée : Ιαν 1, 2004
DOI : https://doi.org/10.12681/bgsg.16726
K. Bogdanov
Department of Mineralogy, Petrology and Economic Geology, Sofia University
D. Tsonev
Department of Mineralogy, Petrology and Economic Geology, Sofia University
K. Popov
University of Mining and Geology
Résumé

Epithermal Cu-Au deposits hosted within volcanic rocks (Radka, Elshitsa, Krassen) are related to Late Cretaceous andesite-dacite volcanic terrain in the Panagyurishte ore district. The Cu-Au ores are linked by a similar mineralogy and differ by the ratio of tennantite, bornite, enargite and discrete trace minerals of Ga, Ge, In and Bi (e.g., roquesite, germanite, betekhtinite, renierite, vinciennite, aikinite). Bi-Se-Te and Ga-Ge-ln-Sn signature with pronounced Au-enrichment of the bornite rich ores is a characteristic feature underlying the increasing role of the fS2/f02 control during the transition from IS te HS environment. Formation of the epithermal Cu-Au deposits appears to have occurred during a single broad event of contemporaneous formation of epithermal and porphyry systems.The close connection between the volcano-plutonic structures facilitates the multistage and polycyclic character of their hydrothermal systems, the similar character of the epithermal ores and the mineral succession in Elshitsa, Radka and Krassen deposits. The ô^S ratios in the sulphide minerals range from -6.7 to 4.0, suggesting comparable magmatic sources for the epithermal mineralizing fluids and close link with porphyry environment.

Article Details
  • Rubrique
  • Economic Geology
Creative Commons License

Ce travail est disponible sous licence Creative Commons Attribution - Pas d’Utilisation Commerciale 4.0 International.

Authors who publish with this journal agree to the following terms:

Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution Non-Commercial License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g. post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (preferably in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.

Téléchargements
Les données relatives au téléchargement ne sont pas encore disponibles.
Références
Amov B., Bogdanov B. & Baldjieva T. 1974. Lead isotope composition and some features concerning the genesis and the age of the ore deposits in south Bulgaria. In: Problems of Ore Deposition, Proc 4th IAGOD Symp., vol. 2,13-25 (in Russian).
Angelkov K. 1974. Ore formation and sulphur isotope composition of the deposits in Panagyurishte ore region (in Russian). In: Problems of Ore Deposition, Proc. 4th IAGOD Symp., 2, 26-33.
Bogdanov B. 1980. Massive sulphide and porphyry-copper deposits in the Panagyurishte district Bulgaria. In: European Copper Deposits. SGA Spec. Pubi., 1, 50-58.
Bogdanov Β. 1984. Hydrothermal systems of massive sulphide, porphyry-copper and vein copper deposits of Sredna Gora zone in Bulgaria. Proc. 6th IAGOD Symp., Stuttgart. 63-67.
Bogdanov B. 1987, The copper deposits in Bulgaria. Technika pubi, Sofia. 388p. (in Bulgarian).
Bogdanov K., Tsonev D. & Kuzmanov K. 1997. Mineralogy of gold in the Elshitsa massive sulphide deposit, Sredna Gora zone, Bulgaria. Mineral. Deposita, 32. 219-229.
Bogdanov K. & Popov K. 2003. Cu-Au epithermal systems in the southern part of Panagyuhshte ore region. Soc. Econ. Geol. Guidebook Series, Vol. 36, 91-114.
Cook N.J., Ciobanu C.L. & Bogdanov K. 2002. Trace mineralogy of the Upper Cretaceous Banatitic Magmatic and Metallogenic belt, S.E. Europe, 11th IAGOD Symp Geocongr 2002. CD vol. of ex. Abst., Geol. Surv. Namibia.
Dabovski C, Harkovska Α., Kamenov B., Mavrudchiev B., Stanisheva-Vassileva G. & Yanev Y. 1991. A geodynamic model of Alpine magmatism in Bulgaria. Geol. Bale, 21, 4, 3-15.
Dimitrov C. 1960. Magmatismus und Erzbildung im Erzgebeit von Panagjuriste. Freib. Forschung. C79.
Handler R., Velichkova S., Neubauer F. & Ivanov Z. 2002. Late Cretaceous magmatic and tectonic processes in the Srednogorie zone, Bulgaria: constraints from 40Ar/39Ar age dating results. GEODE Workshop on Srednogorie. Sofia, April 2002, Abstr. 7.
Hedenquist J.W., Izawa E., Arribas A. & White N.C. 1996. Epithermal gold deposits: Styles, characteristics, and exploration. Resource Geol Spec Pubi No 1, poster and booklet. 17p.
Hedenquist J.W, Arribas A R. & Gonzalez-Urien E. 2000. Exploration for Epithermal Gold Deposits. In: Rev. in Econ. Geol., Hagemann S.G. & Brown P.E. eds, Vol. 13, Gold in 2000, 560p.
Heinrich CA. & Neubauer F. 2002. Cu - Au - Pb - Zn - Ag metallogeny of the Alpine - Balkan - Carpathian - Dinaride geodynamic province. Mineral. Deposita, 37, 533-540.
Jankovic S. 1977. The copper deposits and geotectonic setting of the Tethyan-Eurasian metallogenic belt. Mineral. Deposita, 12, 37-47.
Kouzmanov K. 2001. Genese des concentrations et métaux de base et précieux de Radka et Elshitsa (zone de Sredna Gora, Bulgare): une approche par l'étude mineralogique, isotopique et des inclusions fluids. Ph.D. Thesis, Univ. of Orleans, 437p.
Lilov P. & Chipchakova S. 1999. K-Ar dating of the Upper Cretaceous magmatic rocks and hydrothermal metasomatic rocks from tha Central Srednogorie. Geochem. Mineral. Petrol. 36, 71-91 (in Bulgarian).
Morrison G.W., Rose W.J. & Jaireth S. 1991. Geological and geochemical controls on the silver content (fineness) of gold in gold-silver deposits. Ore Geol. Rev., 6, 333-364.
Peycheva I., Von Quadt Α., Kamenov B., Ivanov Zh. & Georgiev Ν. 2001. New isotope data for Upper Cretaceous magma emplacement in the southern and south-western parts of Central Srednogorie. ABCDGEODE 2001 workshop, Vata Bai, Romania, Abs., Rom. J. Mineral. Depos. 79, Supl. 2, 82-83.
Peycheva I., Von Quadt Α., Kouzmanov K. & Bogdanov K. 2003. Timing of magmatism and mineralisation in Elshitsa and Vlaykov Vrh Cu(Au) deposits of Central Srednogorie, Bulgaria: constraints from U-Pb zircon and rutile geochronology and Hf-zircon and Sr whole-rock tracing. ABCD-GEODE 2003 workshop, Seggauberg, Austria, Abs., 46.
Popov P., Strashimirov S. & Popov K. 2000. Geology and metallogeny of the Srednogorie zone and Panagyurishte ore region. Soc. Econ. Geol. Guidebook Series, Vol.36, 7-25
Radonova T. & Velinov I. 1974. Relationships between propylites and secondary quartzites with the ore mineralizations in the Central and Western Srednogorie (Bulgaria). In: Metasomatism and Ore Formation, Nauka, Moscow, 60-69. (in Russian).
Sillitoe R.H. 1999. VMS and porphyry copper deposits: Products of discrete tectono-magmatic settings. In: Mineral Deposits: Process to Processing, Stanley, C.J. et al. eds. Balkema, Rotterdam, 7-10.
Sillitoe R.H., Hannington M.D., Thompson J.F.H. 1996. High sulphidation deposits in the volcanogenic massive sulphide environment. Econ. Geol. 91, 204-212
Strashimirov. S. & Popov P. 2000. Geology and metallogeny of the Panagyurishte ore region (Srednogorie zone, Bulgaria). GEODE 2000 Workshop, Guide to excursions A and C, Sofia, 50p.
Strashimirov S., Petrunov R. & Kanazirski M. 2002. Porphyry-copper mineralisation in the central Srednogorie zone, Bulgaria. Mineral. Deposita, 37, 587-598.
Tarkian M., Hünken U., Tokmakchieva M. & Bogdanov K. 2003. Precious-metal distribution and fluid-inclusion petrography of the Elatsite porphyry copper deposit, Bulgaria. Minera. Deposita, 38, 261-281.
Todorov T. 1991. NAA analysis of gold in minerals from Upper Cretaceous massive copper deposits in Bulgaria. Terra Nova, 3, 311-316.
Tsonev D. 1974. Evolution of the mineral parageneses in the Radka and Elshitsa cupriferous-pyritic deposits, Panagyurishte ore district, Bulgaria. In: Bogdanov (ed) Problems of Ore Deposition, Proc. 4th IAGOD Symp, v. 2, 327-333.
Velinov I., Loginov V., Nosik L, Radonova T. & Rusinov V. 1978. Genetical features of the massive sulphide deposits from the Srednogorie zone of Bulgaria and Jugoslavia. In: Metasomatism and Ore Deposition. Nauka, Moscow, 176-133. (in Russian).