Precambrian Terranes of the Central Asian Orogenic Belt: Comparative Characteristics, Types, and Peculiarities of Tectonic Evolution

Yarmolyuk, V. V.; Degtyarev, K. E.

doi:10.1134/s0016852119010096

Cited by 30 publications

(5 citation statements)

References 61 publications

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“…The crustal makeup of the CAOB includes blocks of Precambrian crust of variable sizes and fragments of island arc and ophiolite fragments preserved within early Palaeozoic accretionary prism complexes (Yarmolyuk & Degtyarev, 2019). In the western part of the CAOB exposed in Kazakhstan, Tien Shan and Northwestern (NW) China, Precambrian terranes occur as narrow tectonic zones that are several hundred km long and 50 to 100 km wide (Figure 1(b)).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…The Central Asian Orogenic Belt (CAOB) represents the largest accretionary orogen in the world (Figure 1(a)) and is delimited by the Siberian, North China and Tarim cratons that extend through the territories of the Urals, Kazakhstan, Tien Shan, northwestern China, Mongolia and Southern Siberia. The CAOB displays a prolonged tectonic history of development from the Neoproterozoic to the early Mesozoic that involved a series of accretionary events during the evolution of the Palaeo-Asian Ocean (Windley et al 2007;Yarmolyuk & Degtyarev, 2019). The formation of a vast volume of continental crust within the CAOB took place largely during the Precambrian (mostly Palaeo-and Mesoproterozoic) and in part during the early Palaeozoic (Kröner et al 2014(Kröner et al , 2017aDegtyarev et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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High-pressure metamorphism of Precambrian continental crust in the southwestern part of the Central Asian Orogenic Belt (South Kazakhstan and North Tien Shan) and tectonic implications for the evolution of the Palaeo-Asian Ocean

Skoblenko (Pilitsyna),

Kanygina,

Dubenskiy

et al. 2023

Geol. Mag.

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In this study, we investigated the high-pressure (HP) metamorphism of the Precambrian continental crust exposed in the Zheltau terrane in South Kazakhstan (Koyandy complex) and the Chu-Kendyktas terrane in the North Tien Shan of Kyrgyzstan (Aktyuz, Kemin and Kokdzhon complexes) within the SW part of the Central Asian Orogenic Belt. HP quartz–feldspar lithologies of the Koyandy complex consist of migmatized kyanite-bearing garnet–mica paragneisses, garnet–kyanite paragneisses and their derivatives associated with eclogites. Paragneisses demonstrate prograde evolution involving mica dehydration melting and producing magnesium-rich garnet, kyanite and K-feldspar at the near-peak to retrograde stages at pressures of 15–18.5 kbar and temperatures of 800–870°C. The widespread growth of micas in these rocks reflects lower stages of retrogression at P = 10–12 kbar and T = 720–770°C. The age distributions of the cores of detrital zircon grains from the paragneisses indicate a predominance of Neoproterozoic and minor occurrence of Mesoproterozoic and Palaeoproterozoic sources of their protoliths. The ages of ∼487–485 Ma obtained from the zircon rims of the paragneisses reflect the timing of their HP metamorphic re-equilibration. These age clusters are consistent with the age estimates obtained from the rims of zircons in the eclogite-bearing garnet gneisses of the adjacent Aktyuz complex in the North Tien Shan. The P–T paths and zircon ages obtained from the high-grade quartz–feldspar gneisses of the Zheltau and Chu-Kendyktas terranes are thus interpreted to indicate involvement of the crustal material derived from the Precambrian basement (magmatic zircons aged ca. 844 Ma) and its Ediacaran–Cambrian sedimentary cover (detrital zircons with maxima at 1 Ga and 800–600 Ma) in the latest Cambrian subduction processes induced by the closure of the oceanic basins assigned to the Palaeo-Asian Ocean.

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Section: Geological Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-pressure metamorphism of Precambrian continental crust in the southwestern part of the Central Asian Orogenic Belt (South Kazakhstan and North Tien Shan) and tectonic implications for the evolution of the Palaeo-Asian Ocean

Skoblenko (Pilitsyna),

Kanygina,

Dubenskiy

et al. 2023

Geol. Mag.

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“…It is also one of the regions with the largest mineral resource potential in the world (Goldfarb et al, 2014;Chen et al, 2017). The Precambrian terrane remnants and micro-continental blocks involved in the CAOB include the combined Northeast Asia blocks of the Erguna, Xing'an, Songliao, and Jiamusi-Khanka, Kazakhstan-Yili-Central Tianshan, Tuvan-Mongolian, Beishan, North Transbaikalian, Khangai, Issedonian, Ulutau-M, and other blocks (Zhou et al, 2018;Yarmolyuk and Degtyarev, 2019).…”

Section: The Paleo-asian Ocean Regimementioning

confidence: 99%

Construction of the Continental Asia in Phanerozoic: A Review

Chen

Dong

Shi

et al. 2022

Acta Geologica Sinica (Eng)

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This is a review of the formation and tectonic evolution of the continental Asia in Phanerozoic. The continental Asia has formed on the bases of some pre‐Cambrian cratons, such as the Siberia, India, Arabia, North China, Tarim, South China, and Indochina, through multi‐stage plate convergence and collisional collages in Phanerozoic. The north‐central Asia had experienced the expansion and subduction of the Paleo‐Asian Ocean (PAO) in the early Paleozoic and the closure of the PAO in the late Paleozoic and early Mesozoic, forming the PAO regime and Central Asian orogenic belt (CAOB). In the core of the CAOB, the Mongol‐Okhotsk Ocean (MOO) opened with limited expansion in the Early Permian and finally closed in the Late Jurassic–Early Cretaceous. The south‐central Asia had experienced mainly multi‐stage oceanic opening, subduction and collision evolution in the Tethys Ocean, forming the Tethys regime and Himalaya‐Tibetan orogenic belt. In eastern Asia, the plate subduction and continental margin orogeny on western margin of the Pacific Ocean, forms the West Pacific regime and West Pacific orogenic belt. The PAO, Tethys, and West Pacific regimes, together with Precambrian cratons among or surrounding them, made up the major tectonic and dynamic systems of the continental Asia in Phanerozoic. Major tectonic events, such as the Early Paleozoic Qilian, Uralian, and Dunhuang orogeneses, the late Paleozoic East Junggar, Tianshan and West Junggar orogeneses, the Middle to Late Permian Ailaoshan orogeny and North‐South Lhasa collision, the early Mesozoic Indochina‐South China and North‐South China collisions, the late Mesozoic Mongolia‐Okhotsk orogeny, Lhasa‐Qiangtang collision, and intra‐continental Yanshanian orogeny, and the Cenozoic Indo‐Asian, Arab‐Asian, and West Pacific margin collisions, constrained the formation and evolution of the continental Asia. The complex dynamic systems have left large number of deformation features, such as large‐scale strike‐slip faults, thrust‐fold systems and extensional detachments on the continental Asia. Based on past tectonics, a future supercontinent, the Ameurasia, is prospected for the development of the Asia in ca. 250 Myr.

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“…Среди них наиболее крупными выступами мезонеопротерозойской континентальной коры являются Тувино-Монгольский массив с Сангиленским блоком и Сонгино-Тарбагатайский массив. В их пределах обнаружены блоки с ранне-и позднедокембрийским кристаллическим фундаментом, а также многочисленные фрагменты островодужного, аккреционно-коллизионного и плюмового магматизма Yarmolyuk et al, 2017;Yarmolyuk, Degtyarev, 2019].…”

Section: байкальские структурно-формационныеunclassified

The role of island-arc oceanic, collisional and intraplate magmatism in the formation of continental crust in the Mongolia-Trasnbaikalia region: geostructural, geochronological and Sm-Nd isotope data

Гордиенко

2021

Geodin. tektonofiz.

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The formation of continental crust in the Mongolia-Transbaikalia region is researched to identify the mechanisms of interactions between the crust and the mantle in the development of the Neoarchean, Proterozoic and Paleozoic magmatic and sedimentary complexes in the study area. Using the results of his own studies conducted for many years and other published data on this vast region of Central Asia, the author have analysed compositions, ages and conditions for the formation of Karelian, Baikalian, Caledonian and Hercynian structure-formational complexes in a variety of geodynamic settings. Based on the geostructural, petrological, geochemical, geochronological and Sm-Nd isotope data, he determines the crustal and mantle sources of magmatism, conducts the identification and mapping of isotopic provinces, and reveals the role of island-arc oceanic, accretion-collision and intraplate magmatism in the formation of continental crust. Considering the formation of the bulk continental crust, three main stages are distinguished: (1) Neoarchean and Paleoproterozoic (Karelian) (almost 30% of the crust volume), (2) Meso-Neoproterozoic (Baikalian) (50%), and (3) Paleozoic (Caledonian and Hercynian) (over 20%). This sequence of the evolution stages shows the predominance of the ancient crustal material in igneous rocks sources at the early stage. During the subsequent stages, tectonic structures created earlier were repeatedly reworked, and mixed crustal-mantle and juvenile sources were widely involved in the formation of the bulk continental crust in the study area.

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Precambrian Terranes of the Central Asian Orogenic Belt: Comparative Characteristics, Types, and Peculiarities of Tectonic Evolution

Cited by 30 publications

References 61 publications

High-pressure metamorphism of Precambrian continental crust in the southwestern part of the Central Asian Orogenic Belt (South Kazakhstan and North Tien Shan) and tectonic implications for the evolution of the Palaeo-Asian Ocean

High-pressure metamorphism of Precambrian continental crust in the southwestern part of the Central Asian Orogenic Belt (South Kazakhstan and North Tien Shan) and tectonic implications for the evolution of the Palaeo-Asian Ocean

Construction of the Continental Asia in Phanerozoic: A Review

The role of island-arc oceanic, collisional and intraplate magmatism in the formation of continental crust in the Mongolia-Trasnbaikalia region: geostructural, geochronological and Sm-Nd isotope data

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