New data on the age and geodynamic position of copper-porphyry mineralization in the Main Uralian fault zone (South Urals)

Kosarev, A. M.; Пучков, В. Н.; Ronkin, Yu. L.; Seravkin, I. B.; Kholodnov, V. V.; Грабежев, А. И.

doi:10.1134/s1028334x1411004x

Cited by 14 publications

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“…Reliable correlations (Fig. 3) and geodynamic reconstructions are possible due to biostratigraphic constraints from conodonts for the western and eastern margins of the Magnitogorsk zone [Prokin et al, 1985[Prokin et al, , 1988Maslov et al, 1993;Stratigraphic Schemes…, 1993;Seravkin, 1997Seravkin, , 2010Seravkin et al, 1992;Puchkov, 2000Puchkov, , 2010Kosarev et al, 2014;Salikhov et al, 2014;Gas'kov, 2015], together with petrographic and geochemical studies of volcanites.…”

Section: Tectonics and Metallogeny Of South Uralsmentioning

confidence: 99%

“…The lower strata of the Voznesenka-Sakmar sections include sheets of serpentinite mélange with silicic-basaltic olistoliths, oceanic basalts (O 2 ; S 1 ), silicic rocks (S-D 1 ), island arc gabbro, including hornblende gabbro and gabbrodiorites [Fershtater, 2013;Kosarev et al, 2014], shoshonites, and latites (D 1 ?). New to the zone Main Ural Fault is the allocation in its structure of the belt of volcanic rocks D 1 e 2 analogues Baymak-Buribay suites and edaphogenic serpentinite-gabbro-silicic clastic complex is traced from Ishkinino-Repino to Voznesenska-Sharipovo.…”

Section: Island Arc Volcanismmentioning

confidence: 99%

“…In addition to subalkaline volcanics, the Main Ural Fault zone accommodates numerous hornblende gabbro-diorite-plagiogranite and diorite-granodiorite intrusions with porphyry Au-Cu mineralization (Voznesenka and Salavat deposits). The rocks have U-Pb [Grabezhev, Ronkin, 2011;Fershtater, 2013Fershtater, , 2015Grabezhev, 2014] and Sm-Nd [Kosarev et al, 2014] ages from 418 to 399 Ma (Lochkovian -Emsian). Similar ages were obtained for many intrusions with island arc trace-element signatures [Fershtater et al, 2010;Fershtater, 2013Fershtater, , 2015 and the author's data on Voznesenka and Karagaykul [Kosarev et al, 2014] which represent Early Devonian (D 1 lh-e 1 ) magmatism.…”

Section: Island Arc Volcanismmentioning

confidence: 99%

“…2, 3). The volcanics bear geochemical signatures of a suprasubduction setting and fractional crystallization [Kosarev et al, 2014]. Ankaramite, trachybasalt, and trachyandesite rocks in the upper strata are transitional to subalkaline compositions [Kosarev et al, 2005;Pushkarev et al, 2013].…”

Section: Island Arc Volcanismmentioning

confidence: 99%

“…The Early Eifelian volcanics of the complex host the Dzhusa, Barsuchy Log, and East Podolsk deposits of pyrite, chalcopyrite, sphalerite, galena, barite, and tennantite. The Dzhusa complex and its age equivalents in the East Magnitogorsk zone presumably build the detached remnant part at the back of the Early-Eifelian arc [Kosarev et al, 2014]. Later the spreading zone became occupied by the Late Eifelian Karamalytash basalt-rhyodacite complex and its age equivalents.…”

Section: Island Arc Volcanismmentioning

confidence: 99%

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Devonian-Carboniferous Magmatism and Metallogeny in the South Ural Accretionary-Collisional System

Kosarev

Владимиров

Ханчук

et al. 2021

Geodin. tektonofiz.

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The oceanic stage in the history of the South Urals completed in the Ordovician – Early Silurian. The Ordovician through Devonian events in the region included the formation of an island arc in the East Ural zone from the Middle Ordovician to Silurian; westward motion of the subduction zone in the Late Silurian – Early Devonian and the origin of a trench along the Main Ural Fault and the Uraltau Uplift; volcanic eruptions and intrusions in the Magnitogorsk island arc system in the Devonian. The Middle-Late Paleozoic geodynamic evolution of uralides and altaides consisted in successive alternation of subduction and collisional settings at the continent-ocean transition. The greatest portion of volcanism in the major Magnitogorsk zone was associated with subduction and correlated in age and patterns of massive sulfide mineralization (VMS) with Early – Middle Devonian ore-forming events in Rudny Altai. Within-plate volcanism at the onset of volcanic cycles records the Early (D1e2) and Middle (D2ef2) Devonian slab break off. The volcanic cycles produced, respectively, the Buribay and Upper Tanalyk complexes with VMS mineralization in the Late Emsian; the Karamalytash complex and its age equivalents in the Late Eifelian – Early Givetian, as well as the lower Ulutau Formation in the Givetian. Slab break off in the Late Devonian – Early Carboniferous obstructed the Magnitogorsk island arc and supported asthenospheric diapirism. A new subduction zone dipping westward and the Aleksandrovka island arc formed in the Late Devonian – Early Carboniferous. The Early Carboniferous collision and another event of obstructed subduction led to a transform margin setting corresponding to postcollisional relative sliding of plates that produced another slab tear. Postcollisional magmatism appears as alkaline gabbro-granitic intrusives with related rich Ti-magnetite mineralization (C1). Transform faulting persisted in the Middle Carboniferous through Permian, when the continent of Eurasia completed its consolidation. The respective metallogenic events included formation of Cu-Ni picritic dolerites (C2–3), as well as large-scale gold and Mo-W deposits in granites (P1–2).

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Section: Tectonics and Metallogeny Of South Uralsmentioning

confidence: 99%

Section: Island Arc Volcanismmentioning

confidence: 99%