Vendian suprasubduction volcanism in the Uraltau tectonic zone (South Urals)

Самыгин, С. Г.; Федотова, А. А.; Bibikova, Elena; Karyakin, Yu. V.

doi:10.1134/s1028334x07070033

Cited by 10 publications

(4 citation statements)

References 3 publications

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“…Late Precambrian (Vendian) and Paleozoic oceanic and island arc volcanics are known from the Maksyut eclogite-blueschist complex in the Central Ural zone and from the Sysert-Ilmen uplift in the South Urals where metabasalts and plagiogneisses have U-Pb ages of 543±46 and 590±20 Ma [Krasnobaev et al, 1998a[Krasnobaev et al, , 1998bPuchkov, 2000Puchkov, , 2010. Another island arc complex of Lushnikovo occurs in the southern extension of the Central Ural zone, in the Kazakhstan part of the South Urals (Ebet zone), with a U-Pb zircon age constraint of 590 Ma obtained for felsic volcanics [Samygin et al, 2007]. The Vendian Ebet island arc presumably postdated a Late Proterozoic -Early Vendian oceanic stage, which agrees with known regional geology [Puchkov, 2010].…”

Section: Tectonics and Metallogeny Of South Uralsmentioning

confidence: 54%

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

Kosarev

Владимиров

Ханчук

et al. 2021

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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: 54%

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

Kosarev

Владимиров

Ханчук

et al. 2021

Geodin. tektonofiz.

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“…Авторы статьи считают, что среди наиболее вероятных первичных источников зерен dZr с возрастом 510-650 млн лет для протолита кварцитов СМК южной части Суванякской тектонической единицы (а возможно, и для некоторых частей Максютовской тектонической единицы) были гранитоиды с оценками изотопного возраста 590±4 млн лет [Samygin et al, 2007], 577.8±8.6 и 543.2±4.6 млн лет [Samygin et al, 2010] (срав. с рис.…”

Section: обсуждение результатовunclassified

“…At the top and at the bottom are the plots of ε Hf vs U-Pb age of detrital zircon, the sample numbers correspond to those on the PPCs. Существуют представления о том, что надсубдукционные гранитоиды, ассоциирующие с образованиями каялинской и лушниковской свит, экспонированные в ядре Эбетинской антиформы, были сформированы в зоне активной континентальной окраины Балтики [Samygin et al, 2007[Samygin et al, , 2010Samygin, Kheraskova, 2005;Ryazantsev et al, 2019]. Однако реальных доказательств автохтонности комплексов, экспонированных в ядре Эбетинской антиформы (каялинская и лушниковская свиты и ассоциирующие с ними эдиакарские гранитоиды), по отношению к Уральскому краю Балтики не существует.…”

Section: обсуждение результатовunclassified

“…Результаты геохронологического и изотопно-геохимического изучения циркона из разновозрастных докембрийских и палеозойских осадочных, магматических и метаморфических комплексов (протоуралид и уралид) Южного Урала позволили существенно уточнить характер геодинамической эволюции южного сегмента уральского обрамления Восточно-Европейской платформы (ВЕП) [Samygin et al, 2007[Samygin et al, , 2010Puchkov, 2010;Kuznetsov et al, 2012Kuznetsov et al, , 2014Kuznetsov et al, , 2017Romanyuk et al, 2014;Maslov et al, 2016;Ryazantsev et al, 2019;Kuznetsov, Romanyuk, 2021; и ссылки в данных работах]. В то же время некоторые комплексы запада Южного Урала все еще остаются недостаточно охарактеризованными в этом отношении.…”

Section: Introductionunclassified

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ON PALEOTECTONIC BELONGING OF THE SUVANYAK METAMORPHIC COMPLEX (SOUTHERN URALS) FROM THE U-Th-Pb DATING OF DETRITAL ZIRCON GRAINS

Голионко

Кузнецов

Strashko

et al. 2023

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U-Th-Pb isotope dating of grains of detrital zircon from quartzites of the Suvanyak metamorphic complex, which forms the Suvanyak tectonic unit that forms the western part of the Uraltau uplift, located in the east of the West Ural megazone in the Southern Urals. The results of isotope dating of grains of detrital zircon from quartzites of the southern part of the Suvanyak metamorphic complex (samples G18-1 and R14-396) show that numerous populations of Late Neoproterozoic–Early Cambrian detrital zircon grains suggest a Peri-Gondwanan origin of the primary sources of detrital material for the protolith of the studied rocks.The structure of the Suvanyak tectonic unit involves metamorphic formations of different ages – Early Paleozoic in the south and Late Precambrian in the north, which are now formally united into a single Suvanyak metamorphic complex. Their differentiation requires additional research.For the Late Paleozoic southeastern margin of the Baltica (at that time already involved in the structure of the composite continent Arct-Laurussia), according to the results of isotope-geochronological study of detrital zircon from the sedimentary and metasedimentary sequences of the Southern Urals, a number of the following tectonic structures were identified. Near the southeastern edge of the margin, there was a Late Neoproterozoic–Early Cambrian oceanic basin, within which a volcanic arc or arcs were active during 650–520 Ma. The structure of the southeastern edge of the margin included the Peri-Gondwanan terrane or terranes (? Cadomian type), as well as thick Riphean-Early Paleozoic sedimentary sequences, autochthonous to the Baltica.

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Geochronological, geochemical and isotopic study of detrital zircon suites from late Neoproterozoic clastic strata along the NE margin of the East European Craton: Implications for plate tectonic models

et al. 2010

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Vendian suprasubduction volcanism in the Uraltau tectonic zone (South Urals)

Cited by 10 publications

References 3 publications

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

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

ON PALEOTECTONIC BELONGING OF THE SUVANYAK METAMORPHIC COMPLEX (SOUTHERN URALS) FROM THE U-Th-Pb DATING OF DETRITAL ZIRCON GRAINS

Geochronological, geochemical and isotopic study of detrital zircon suites from late Neoproterozoic clastic strata along the NE margin of the East European Craton: Implications for plate tectonic models

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