The Early Precambrian metamorphic events in Eastern Sarmatia

Савко, К. А.; Самсонов, А. В.; Kotov, A. B.; Сальникова, Е. Б.; Korish, Ekaterina H.; Ларионов, А. Н.; Anisimova, I. V.; Bazikov, N. S.

doi:10.1016/j.precamres.2018.04.009

Cited by 41 publications

(16 citation statements)

References 72 publications

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“…Mafic volcanism is widely manifested after cratonization of the Mesoarchean basement in Sarmatia at 2.8 Ga (Savko et al, 2018). During 2.8–2.6 Ga, rift structures formed, and lavas of predominantly basaltic composition erupted (Savko et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Sarmatia consists of at least two Archean nuclei, the Palaeoarchean ‘stitched’ by the Palaeoproterozoic Sevsk–Ingulets (Kirovograd) orogen (Figure 1). The 2.8 Ga metamorphism marked the final tectonic framework of the Palaeo‐ and Mesoarchean basement (Savko et al, 2018). After stabilization of the Sarmatian crust, a thick basalt sequence of the Mikhailovka Group in the Kursk Domain and the Novokryvyi Rih Formation in the Dnieper Domain were formed approximately during 2.75–2.65 Ga, as a result of continental rifting with metakomatiites at the base.…”

Section: Geological Backgroundmentioning

confidence: 99%

“…The Rogovoe Formation is absent here or occurs sporadically and is composed only of terrigenous rocks. The age of the Kurbakino Formation is 2,050–2,070 Ma (Tsybulyaev & Savko, 2017). The rocks of the Sarmatia sedimentary basins were metamorphosed as a result of collisional processes of about 2,070 Ma (Savko et al, 2018). …”

Section: Neoarchean‐palaeoproterozoic Sedimentary Basins On the Sarmatian Cratonmentioning

confidence: 99%

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Neoarchean‐Palaeoproterozoic sedimentary basins in the Sarmatian Craton: Global correlations and connections

et al. 2021

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The East European Craton is a collage of Early Precambrian crustal fragments including Fennoscandia, Sarmatia, and Volga‐Uralia, which are welded by Palaeoproterozoic collisional orogens. Here, we present a detailed overview of the sedimentary basins in Sarmatia that incorporate giant belts of banded iron formations (BIFs) and are therefore important in understanding the geological history and global correlations during the Archean‐Proterozoic transition. Among the two sedimentary basins in Sarmatia (Mikhailovsky and Tim‐Kryvyi Rih), the Mikhailovsky Basin is characterized by the presence of a carbonate platform underlying BIFs. The BIFs are locally overlain by thin clastic deposits. Thick‐bedded dolomites occur with BIF in the Tim Kryvyi Rih Basin. In the Mikhailovsky Basin, after their deposition there was a long‐lasting hiatus. In the Mikhailovsky Basin, there are no sedimentary rocks after the regional hiatus except for glacial deposits. Sedimentation resumed with the development of continental rift‐related structures, where the accumulation of terrigenous sediments was accompanied by, and culminated with, outflows of basalts at 2.1 Ga. A detailed evaluation of the history of sedimentary basins in Sarmatia record transgression (~2.6–2.4 Ga) with the accumulation of giant BIFs (~2.50–2.45 Ga), regression (~2.4–2.2 Ga), hiatus and glaciations (~2.4–2.2 Ga), and rift‐related volcanism (~2.2–2.1 Ga). We attempt a correlation of the sedimentary sequences in Sarmatia with those of Pilbara, Kaapvaal, and São Francisco cratons which show that the geological events on all these cratons were similar during 2.6–2.4 Ga. We thus propose that the Sarmatia Craton may serve as a link in the palaeocontinental correlations of the Vaalbara Supercraton and the São Francisco Craton, based on the striking similarity in the Neoarchean‐Early Palaeoproterozoic sedimentary basins.

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Section: Discussionmentioning

confidence: 99%

Section: Geological Backgroundmentioning

confidence: 99%

Section: Neoarchean‐palaeoproterozoic Sedimentary Basins On the Sarmatian Cratonmentioning

confidence: 99%

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Neoarchean‐Palaeoproterozoic sedimentary basins in the Sarmatian Craton: Global correlations and connections

et al. 2021

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“…4). [28,33,34], фиксирует консолидацию мезоархейской коры, основным структурно-вещественным элементом которой были зеленокаменные области и комплексы ТТГ. Проявления ТТГ магматизма в неоархее и палеопротерозое отсутствуют в Восточной Сарматии, хотя в пределах других древних кратонов неоархейские и даже палеопротерозойские ТТГ не редкость.…”

Section: методы исследованияunclassified

Геохронология ТТГ Ассоциации В Мезоархее Курского Блока Восточной Сарматии

Савко¹,

Bazikov²,

Кориш³

et al. 2019

geology

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Изотопное датирование цирконов методами SIMS и TIMS позволило установить три импульса ТТГ магматизма в Курском блоке Восточной Сарматии: 2960, 3025 и 3050 млн лет назад. Следовательно, формирование ТТГ Курского блока было длительным процессом, продолжавшимся не менее 90 млн лет. Они имеют такие же петрохимические характеристики с близкими по возрасту ассоциациями Среднеприднепровского (2,97–3,03 млрд лет) и Приазовского (2,97–3,04 млрд лет) блоков. Lu-Hf изотопные данные по цирконам (εHf(2960) = +0,2 – +2,6) свидетельствуют о кратковременной коровой предыстории источников ТТГ расплавов.

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“…Решение этих вопросов одна из приоритетных фундаментальных задач геологии раннего докембрия, решение которой требует накопления надёжной информации о составе, возрасте и происхождении протолитов зеленокаменных ассоциаций различных архейских кратонов. Решение этих задач в пределах Курского блока (КБ), который вместе с Среднеприднепровским и Приазовским блоками Украинского щита (УЩ) рассматривался как единое мезоархейское ядро Восточной Сарматии [1], непростое из-за их метаморфической переработки в ходе дальнейшей истории [2]. Однако такая корреляция архейских доменов УЩ и КБ до сих пор не имеет надёжных изотопно-геохимических и геохронологических обоснований из-за очень слабой геохронологической и петрологической изученности архейских комплексов КБ.…”

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Mesoarchean silicic volcanics of the Kursk block, Voronezh crystalline massif: composition, age and correlation with the Ukrainian shield

Савко

Самсонов

Larionov

2019

Доклады Академии наук

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Rhyolites and basite rocks are present in the Archaean greenstone belts of the Kursk Domain (KD) of the East Sarmatia. The rhyolite age is 3122 ± 9 Ma (zircons, SIMS). A positive εNd (3122) = + 0.9 for rhyolites and their Sm-Nd model age ТNd (DM) = 3300 Ma as well as the age of the inherited zircon (3250 Ma) testifies to the participation of the more ancient crust component in the formation of rhyolite magmas. In geochemistry, rhyolites are very close to the TTG of the KD with an age 2.96-3.03 Ga. In the Middle Dnieper granite - greenstone area there are rhyolites and dacites with an age of 3.12 Ga with εNd (T) = + 0.6 - (+1.2) and very close geochemical characteristics. Thus, the hypothesis of a common geological history of the eastern part of Ukrainian Shield and KD in Mesoarchean is confirmed.

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The Early Precambrian metamorphic events in Eastern Sarmatia

Cited by 41 publications

References 72 publications

Neoarchean‐Palaeoproterozoic sedimentary basins in the Sarmatian Craton: Global correlations and connections

Neoarchean‐Palaeoproterozoic sedimentary basins in the Sarmatian Craton: Global correlations and connections

Геохронология ТТГ Ассоциации В Мезоархее Курского Блока Восточной Сарматии

Mesoarchean silicic volcanics of the Kursk block, Voronezh crystalline massif: composition, age and correlation with the Ukrainian shield

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