Early Neoproterozoic fore-arc basin strata of the Malyi Karatau Range (South Kazakhstan): Depositional ages, provenance and implications for reconstructions of Precambrian continents

Алексеев, Д. В.; Khudoley, A. K.; DuFrane, S. Andrew; Glorie, Stijn; Vishnevskaya, I.A.; Semiletkin, S.A.; Летникова, Е. Ф.

doi:10.1016/j.gr.2023.03.019

Cited by 12 publications

(4 citation statements)

References 102 publications

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“…Before its front, at the end of the Neoproterozoic, a marginal trough formed in the territory of the Central Caspian depression [8]. This scenario appears to be plausible, and can be compared with a recently developed model for the ancient geological history of the Karatau Range of southern Kazakhstan and the Middle Tien Shan, where close tectonic events at the end of the Neoproterozoic era led to the unification of the Central Kazakhstan and Tien Shan continental blocks with the supercontinent Rodinia [31].…”

Section: The Formation Of the Carbonate Platform In The North Caspian...mentioning

confidence: 88%

The Geotectonic Peculiarities of the North Caspian Permian Salt-Bearing Basins (Kazakhstan)

Zhemchuzhnikov,

Akhmetzhanov,

Ibrashev

et al. 2024

Geosciences

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This article examines the geotectonic and sedimentary features of the Upper Devonian–Carboniferous–Permian deposits of the North Caspian basin, represented by deposits of marine Paleozoic-isolated carbonate platforms formed during the subsidence of the basement on the passive continental margin. The top is covered by thick salt-bearing Kungurian deposits from the end of the Early Permian epoch. The formation of carbonate platforms is associated with a major tectonic restructuring of the basin at the turn of the Caledonian and Hercynian eras, when the Paleo-Tethys Ocean was formed and isolated carbonate islands began to grow in an open marine environment. The central part of the depression experienced a long and gradual subsidence that spanned the entire Paleozoic era and the beginning of the Mesozoic era. In the south and east, from the Devonian to the Permian periods, barriers were formed in the form of island carbonate massifs that separated the North Caspian basin from the Paleo-Tethys Ocean. During the formation of the salt-bearing basin, these barriers limited water exchange and ensured a one-way influx of sea water from the open ocean. As a result, at the end of the Permian period, thicker salts accumulated; however, during the collision of the continental massifs, an invasion of many kilometers of redbeds occurred. They initially stopped salt accumulation; however, gradually, in the north of the Caspian Sea during Roadian times, the salt accumulation continued. The post-Roadian time is associated with the influx of large quantities of redbed sediments, which caused gravitational instability in the underlying salt, and salt tectonics began with the formation of domal structures.

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Section: The Formation Of the Carbonate Platform In The North Caspian...mentioning

confidence: 88%

The Geotectonic Peculiarities of the North Caspian Permian Salt-Bearing Basins (Kazakhstan)

Zhemchuzhnikov,

Akhmetzhanov,

Ibrashev

et al. 2024

Geosciences

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“…The distinct feature is the almost complete lack of Mesoproterozoic magmatic rocks. The similar ages of the primary magmatic episodes and similar depositional facies indicate that in the late Precambrian, they represented a single continent with the Tarim and Yangtze cratons (Degtyarev et al, 2017;Alexeiev et al, 2023).…”

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confidence: 82%

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Their tectonic and magmatic history has been characterised in recent decades (Degtyarev et al, 2017;Alexeiev et al, 2023); however, the configuration and origin of individual terranes, their primary relationships, geodynamic evolution and the formation processes of the continental crust in many areas are still poorly understood due to the scarcity of modern high-precision geochronological, geochemical and isotopic data.The Aktau-Yili terrane (Degtyarev et al, 2017), also referred to as the Aktau-Junggar microcontinent (Degtyarev, 2003;Windley et al, 2007), is one of the largest Precambrian blocks in western CAOB. It extends for more than 1000 km from Central Kazakhstan to the Chinese Central Tianshan (Fig.

…”

mentioning

confidence: 99%

“…Their tectonic and magmatic history has been characterised in recent decades (Degtyarev et al, 2017;Alexeiev et al, 2023); however, the configuration and origin of individual terranes, their primary relationships, geodynamic evolution and the formation processes of the continental crust in many areas are still poorly understood due to the scarcity of modern high-precision geochronological, geochemical and isotopic data.…”

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confidence: 99%

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Early Neoproterozoic Granite‐Gneisses of the Junggar Alataw (Southeastern Kazakhstan): Age, Petrogenesis and Tectonic Implications

KANYGINA,

TRETYAKOV,

ALEXEIEV

et al. 2024

Acta Geologica Sinica (Eng)

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The combined petrographic, petrological, geochemical and geochronological study of the Neoproterozoic gneisses of the Sarychabyn and Baskan complexes of the Junggar Alataw of South Kazakhstan elucidate the Precambrian tectonic evolution of the Aktau–Yili terrane. It is one of the largest Precambrian crustal blocks in the western Central Asian Orogenic Belts. The U–Pb single‐grain zircon ages indicate that granite‐gneisses formed from the same source and crystallised in the early Neoproterozoic ca 930–920 Ma. The chemical composition of gneisses corresponds to A2‐type granites. The whole‐rock Nd isotopic characteristics (ɛNd(T) = −1.0 to −4.9 and TNd(DM‐2st) = 1.7 to 1.9 Ga) indicate the involvement of Paleoproterozoic crustal rocks in magma generation. Early Neoproterozoic ca 930–920 Ma A‐type granitoids in the Aktau–Yili terrane of South and Central Kazakhstan might reflect within‐plate magmatism adjacent to the collisional belt or a local extension setting in back‐arc areas of the continental arc.

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Early Paleozoic juvenile crustal growth in the Paleo-Asian Ocean: A contribution from the Zasur'ya accretionary complex of NW Altai

Safonova,

Krutikova,

Perfilova

et al. 2024

Earth-Science Reviews

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Early Neoproterozoic fore-arc basin strata of the Malyi Karatau Range (South Kazakhstan): Depositional ages, provenance and implications for reconstructions of Precambrian continents

Cited by 12 publications

References 102 publications

The Geotectonic Peculiarities of the North Caspian Permian Salt-Bearing Basins (Kazakhstan)

The Geotectonic Peculiarities of the North Caspian Permian Salt-Bearing Basins (Kazakhstan)

Early Neoproterozoic Granite‐Gneisses of the Junggar Alataw (Southeastern Kazakhstan): Age, Petrogenesis and Tectonic Implications

Early Paleozoic juvenile crustal growth in the Paleo-Asian Ocean: A contribution from the Zasur'ya accretionary complex of NW Altai

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