Results 131 to 140 of about 7,177,983 (162)

Nature and provenance of the Beishan Complex, southernmost Central Asian Orogenic Belt

International Journal of Earth Sciences, 2017
The ages and origins of metasedimentary rocks, which were previously mapped as Precambrian, are critical in rebuilding the orogenic process and better understanding the Phanerozoic continental growth in the Central Asian Orogenic Belt (CAOB). The Beishan Complex was widely distributed in the southern Beishan Orogenic Collage, southernmost CAOB, and ...
Rongguo Zheng, Jinyi Li, Wenjiao Xiao, Jin Zhang   +3 more
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Geochemical and Geochronological Evidence for a Former Early Neoproterozoic Microcontinent in the South Beishan Orogenic Belt, Southernmost Central Asian Orogenic Belt

Precambrian Research, 2015
Abstract The South Beishan Orogenic Belt (SBOB) in the southwestern Central Asian Orogenic Belt (CAOB) is thought to be an eastern extension of the Eastern Tianshan Orogen. Up to now, it has been suggested to consist of a well-preserved Paleozoic magmatic and sedimentary sequence with a possible former Neoproterozoic microcontinent.
Zhaochu Hu, Zhenyu He, Zeming Zhang
exaly   +2 more sources

The Central Asian Orogenic Belt and growth of the continental crust in the Phanerozoic

Geological Society, London, Special Publications, 2004
Abstract Asia is the world’s largest composite continent, comprising numerous old cratonic blocks and young mobile belts. During the Phanerozoic it was enlarged by successive accretion of dispersed Gondwana-derived terranes. The opening and closing of palaeo-oceans would have inevitably produced a certain amount of fresh mantle-derived ...
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Structural constraints on the evolution of the Central Asian Orogenic Belt in SW Mongolia

American Journal of Science, 2010
We provide a detailed description of the structures along a 300 km long and 50 km wide transect across the Central Asian Orogenic Belt (CAOB) in southwestern Mongolia, covering the Precambrian Dzabkhan continental domain with overthrust Neoproterozoic ophiolites in the north (Lake Zone), a Silurian-Devonian passive margin association (Gobi-Altai Zone ...
Lehmann, J., Schulmann, K., Lexa, O., Corsini, M., Kröner, A., Štípská, P., Tomurhuu, D., Otgonbator, D.   +7 more
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Processes of Pangea construction: correlation of Variscan and Central Asian orogenic belts

Journal of the Geological Society
This ‘Thematic Edition’ originated thanks to a symposium of the European Union of Geosciences held in Vienna in 2022. It is a collection of 14 contributions covering a wide spectrum of approaches and concepts ranging from mantle convection models, geophysical crustal characterization, regional synthesis of detrital zircon data, geochemistry, modern ...
Karel Schulmann, Wenjiao Xiao, José R. Martínez Catalán   +2 more
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The Hercynian Ikat thrust in the Transbaikalian segment of the Central Asian Orogenic Belt

Russian Geology and Geophysics, 2015
Abstract We present a comprehensive description of the blastomylonites of the Ikat thrust localized within the Ikat terrane in the East Transbaikalian branch of the Central Asian Orogenic Belt. The metamorphic rocks of the Garga block are thrust over the almost unmetamorphosed Cambrian deposits of the Ikat Formation.
L.Z. Reznitsky, S.I. Shkol’nik, A.V. Ivanov, E.I. Demonterova, E.F. Letnikova, C.-H. Hung, S.-L. Chung   +6 more
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Mantle transition zone structure beneath the Central Asian Orogenic Belt

Science China Earth Sciences, 2019
Over the past decades, there have been hot debates in the geodynamic community regarding to the deep evolution mechanisms of Cenozoic volcanism in the Central Asian Orogenic Belt (CAOB). Of all the constraints available, high resolution structure of upper mantle discontinuities, especially the discontinuities at depths of 410 km (D410) and 660 km ...
Jing He, Qingju Wu
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Metamorphic complexes in accretionary orogens: Insights from the Beishan collage, southern Central Asian Orogenic Belt

Tectonophysics, 2016
Abstract The sources of ancient zircons and the tectonic attributions and origins of metamorphic complexes in Phanerozoic accretionary orogens have long been difficult issues. Situated between the Tianshan and Inner Mongolia orogens, the Beishan orogenic collage (BOC) plays a pivotal role in understanding the accretionary processes of the southern ...
Dongfang Song, Wenjiao Xiao, Brian F. Windley, Chunming Han, Lei Yang   +4 more
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Ridge subduction and slab windows in the Central Asian Orogenic Belt: Tectonic implications for the evolution of an accretionary orogen

Gondwana Research, 2018
Abstract Cenozoic ridge subduction and the resultant slab windows have been well documented worldwide, especially along the western margins of North and South America. The principal characteristics of ridge subduction, which can be used to recognize the process in ancient orogens, include intrusion of ridge-generated magmas into a forearc in a near ...
Brian F. Windley, Wenjiao Xiao
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Paleozoic paleogeography of the south western part of the Central Asian Orogenic Belt

2015
The Central Asian Orogenic Belt (CAOB) is one of the world's largest accretionary orogens, which was active during most of the Paleozoic. In recent years it has again moved into focus of the geological community debating how the acrreted lithospheric elements were geographical arranged and interacting prior and/or during the final amalgamation of ...
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