Journal ArticleDOI
Evolution of the Paleo-Asian Ocean (Altai-Sayan Region, Central Asia) and collision of possible Gondwana-derived terranes with the southern marginal part of the Siberian continent
M M Buslov,I. Yu. Saphonova,Tsuyoshi Watanabe,O T Obut,Y. Fujiwara,K. Iwata,N. N. Semakov,Y. Sugai,L V Smirnova,A. Yu. Kazansky +9 more
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TLDR
In this article, a revised terrane classification based on Vendian-Cambrian geodynamic units and evolution of terranes is described. And reactivated suture zones along the terrane boundaries are proposed, which suggest the important role of strike-slip deformations in the formation of mosaic block structure of Central Asia.Abstract:
The paper reviews and integrates new results on the evolution of the Paleo-Asian Ocean and its related geodynamics and geology of Altai-Sayan Region (ASR) in Central Asia. A revised terrane classification based on Vendian-Cambrian geodynamic units and evolution of terranes is described. Reactivated suture zones along the terrane boundaries are proposed. The obtained data suggest the important role of strike-slip deformations in the formation of mosaic-block structure of Central Asia. Those complicated and multi-stage deformations resulted from the Late Devonian-Early Carboniferous collision of Gondwana-derived terranes. The deformations reached their peak in the Late Carboniferous-Permian due to the collision of the Kazakhstan and Siberian continents. A system of sinistral strike-slip faults formed ASR along the margin of the Siberian continent as a result of the Late Carboniferous-Permian collision. The intrusion of granites occurred in East Kazakhstan and northwestern Gorny Altai in the Late Carboniferous and Permian. This resulted in the formation of the Northern Eurasia continent. Geodynamic evolution of the Paleo-Asian ocean and paleotectonics of ASR allow to recognize in the region the following five geodynamic stages: Vendian-Early Cambrian, Early Ordovician, Early-Middle Devonian, Late-Devonian-Early Carboniferous and Late Carboniferous-Early Permian times.read more
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Tectonic models for accretion of the Central Asian Orogenic Belt
TL;DR: The Central Asian Orogenic Belt ( c. 1000-250 Ma) formed by accretion of island arcs, ophiolites, oceanic islands, seamounts, accretionary wedges, and oceanic plateaux and microcontinents in a manner comparable with that of circum-Pacific Mesozoic-Cenozoic orogens is studied in this article.
Journal ArticleDOI
Accretion leading to collision and the Permian Solonker suture, Inner Mongolia, China: Termination of the central Asian orogenic belt
TL;DR: In this paper, the authors report new field data for the Ondor Sum melange in the Ulan valley, and present a new evaluation of the orogenic belt extending from the southern Mongolia cratonic boundary to the north China craton.
Journal ArticleDOI
Middle Cambrian to Permian subduction-related accretionary orogenesis of Northern Xinjiang, NW China: Implications for the tectonic evolution of central Asia
Wenjiao Xiao,Chunming Han,Chao Yuan,Min Sun,Shoufa Lin,Hanlin Chen,Zilong Li,Jiliang Li,Shu Sun +8 more
TL;DR: In this paper, the authors assumed that the Chinese Altay-East Junggar-Eastern Tien Shan domain was more closely located to Siberia, while the West Junggars and Yili domains occupied an intermediate position near the Kazakhstan block in the early Paleozoic Paleoasian Ocean.
Journal ArticleDOI
End-Permian to mid-Triassic termination of the accretionary processes of the southern Altaids: implications for the geodynamic evolution, Phanerozoic continental growth, and metallogeny of Central Asia
Wenjiao Xiao,Brian F. Windley,Baochun Huang,Chunming Han,Chao Yuan,Hanlin Chen,Min Sun,Shu Sun,JL Li +8 more
TL;DR: In this paper, the authors presented the late Paleozoic to early Mesozoic accretionary tectonics of two key areas, North Xinjiang in the west and Inner Mongolia in the east, together with neighboring Mongolia, based on structural geology, geochemical, geochronological, and paleomagnetic data.
Journal ArticleDOI
The Central Asian orogenic belt and growth of the continental crust in the Phanerozoic
TL;DR: Using the Nd-Sr isotope tracer technique, the majority of granitoids from the Central Asian Orogenic Belt (CAOB) can be shown to contain high proportions (60 to 100%) of the mantle component in their generation as discussed by the authors.
References
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Journal ArticleDOI
Evolution of the Altaid tectonic collage and Palaeozoic crustal growth in Eurasia
TL;DR: A new tectonic model, postulating the growth of giant subduction-accretion complexes along a single magmatic arc now found contorted between Siberia and Baltica, shows that Asia grew by 5.3 million square kilometres during the Palaeozoic era as mentioned in this paper.
Book
Using Geochemical Data : Evaluation, Presentation, Interpretation
TL;DR: In this article, the authors present a method to discriminate between Tectonic Environments using data from Geochemical Data and Radiogenic Isotopes and Isotope Data.
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The application of a ThHfTa diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary Volcanic Province
TL;DR: In this paper, the effects of different types of bulk lower and upper crustal contamination of a within-plate alkali basalt on the Th, Hf, Ta and radiogenic isotope concentrations of the residual liquids are calculated in detail.
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Revised World maps and introduction
TL;DR: The authors reviewed the highlights of the 1988 Symposium on Palaeozoic Biogeography and Palaeogeography, and presented a revised set of 20 base maps that incorporate much of the new data presented at the symposium.