№ 2, 2018

Mantle gold-bearing content and classification of Meso-Cenozoic gold ore formations of Lesser Caucasus (Azerbaijan)

Ismail-Zadeh A.J.,¹ Musayev Sh.D.,² Veliyev Z.A.¹

1 – Geology and Geophysics Institute, Azerbaijan National Academy of Sciences, Javid Ave., 119, Baku, Azerbaijan, AZ1143: arifismail@mail.ru

2 – “AzerGold” CJSC,  M.Mushfig Str., 2H, Baku, Azerbaijan, AZ1004

Summary. Gold-bearing ore deposits of the Lesser Caucasus are confined to Meso-Cenozoic subsequently-differentiated volcano-plutonic formations with gabbro-diorite-granodiorite-granite facies which are of crustal-mantle subduction formations of island-arc continental margins. Genetic types of gold-bearing ore deposits are confined to three structural-formational zones: Lok-Garabagh, Geycha-Akera and Ordubad forming during  Newkimmerian (J3-K1), Austrian (К1-K2) and Pyrenean (Р2-Р3) phases of tectonic-magmatic activizations corresponding to the geodynamic regimes of multi-event manifestation of mantle diapirism stipulating occurrence of the back-arc extension (spreading). Their formation starts with the basite alongside with the acid facies of island-arc complexes following the formation of single copper pyrite – polymetalline ore-magmatic system with gold-bearing ore mineralization. Polingenic melting of initial granitoid magmatic melt causes the last stage formation of differentiation for rhyolite-dacite differences, with fluids to be interlinked by hydrothermal gold mineralization. Its further interaction with gold extracted from mantle-serpentinized rocks of ultrabasic complex of oceanic crust. The processes of multiple melting and gold redirection from rocks into the fluid causes concentration and formation of gold-bearing ore accumulations.

Keywords: back arc spreading, geodynamics, classification, genetic types of gold ore formations

 

REFERENCE

Allakhverdiyev G.I. Geological structure and history of tectonic development of Kalbajar superimposed pit. Abstract of dissertation for doctor of geological mineralogical sciences, Baku, 1967, 40 p. (in Russian).

Baba-zadeh V.M., Musayev Sh.D., Nasibov T.N., Ramazanov V.G. Gold of Azerbaijan. Azerbaijan National Encyclopedia. Baku, 2003, 342 p. (in Russian).

Belov A.A. The Boundary of Gondwana and Eurasia and the suture of Paleothetis in Caucasian sector of Mediterranean belt. In: Tectonic and structural Geology. Nauka. Moscow, 1976, 32 p. (in Russian).

Belov A.A. Tectonic development of Alpine folded area in Paleozoic. Proceedings GIN AS USSR, Moscow, V.347, 1981, 210 p.  (in Russian).

Bortnikov N.S. Geochemistry and origin of ore forming fluids in hydrothermal-magmatic systems in tectonically active zones. Geology of ore fields. V. 48, № 1, 2006, pp. 3-28 (in Russian).

Hasanov T.Ab. Ophiolites of Lesser Caucasus. Nedra. Moscow, 1985, 240 p. (in Russian).

Huseynov D.A. Ore bearing of subvolcanic formations of Gizilbulag ore field. Abstract of PhD Thesis. 25 p. (in Russian).

Ismayil-zadeh A.D. Bipolar conjugation of volcano-plutonic and ophiolitic belts in Caucasus. Proceedings of  NAS of Azerbaijan. The sciences of Earth, № 1, 2009, pp. 40-53 (in Russian).

Ismayil-zadeh A.D., Yemelyanova Y.N., Valiyev Z.A., Latifova E.N. Problems of Metallogeny of Sevan- Akera zone of Lesser Caucasus. Proceedings of  NAS of Azerbaijan. The sciences of Earth, № 1, 2008, pp. 55-66 (in Russian).

Kashkai M.A. Petrology and metallogeny of Dashkesan. Moscow, 1965, pp. 323-340 (in Russian).

Kashkai M.A., Aliyev V.I., Mammadov A.I. and others. Petrology and metallogeny of magmatic formations of Tutkhun basin. Kalbajar region of Azerbaijan SSR. AN Azerb. SSR. Baku, 1967, 228 p. (in Russian).

Kerimov G.I., Selimkhanov N.M. Secondary quartzites. Geology of Azerbaijan. V. 5, AN Azerb. SSR. Baku, 1957, pp. 275-291 (in Russian).

Kerimov G.I. Petrology and ore content of Gedabay ore junction. Azerb SSR. AN Azerb. SSR. Baku,  1963, 219 p. (in Russian)

Korobeynikov A.F., Mironov A.G. Geochemistry of gold in endogenic processes and formation conditions of gold bearing fields. Nauka. Novosibirsk, 1992, 216 p. (in Russian).

Leonov M.G. and others. Consolidated crust of Caucasus. Nedra. Moscow, 1999, pp. 227-252 (in Russian).

Makhmudov A.I., Hajiyev T.G., Zeynalov M.B. Copper-cobalt-nickel sulfide minerals of Ketam deposit (Lesser Caucasus). Bulgarian Academy of Sciences. Ore-forming processes and mineral deposits, 7, Sofia, 1977, pp. 57-70.

Mustafayev G.V. Mesozoic granitoid formations of Azerbaijan and peculiarities of its metallogeny. Elm. Baku, 1977, 234 p. (in Russian)/

Rustamov M.I. The model of ophiolites root in geodynamical evolution of Lesser Caucasus Mesothethisis. Proceedings of  NAS of Azerbaijan. The sciences of Earth, № 2, 2012, pp. 3-21 (in Russian).

Sazonov V.N., Ogorodnikov V.N., Korotayev B.A., Polenov Y.A.,  Gold deposits of Ural. Yekaterinburg, 1999, 622 p. (in Russian).

Shikhalibeyli E.Sh. 1981. Main characteristics of tectonics history development of Azerbaijan. Proceedings of  AS of Azerb.SSR. The sciences of Earth series, № 2, 1981, pp. 14-23, pp. 43-55 (in Russian).

Suleymanov E.S. 1982. Gold ore formations of  Lesser Caucasus (within the boundaries of Azerbaijan), Elm. Baku, 1982, 282 p. (in Russian).

 

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doi:10.33677/ggianas20180200012

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