The Altai-Mongolia terrane in the Central Asian Orogenic Belt (CAOB): A peri-Gondwana one? Evidence from zircon U-Pb, Hf isotopes and REE abundance

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	The Altai-Mongolia terrane in the Central Asian Orogenic Belt (CAOB): A peri-Gondwana one? Evidence from zircon U-Pb, Hf isotopes and REE abundance
	Yang, TN (Yang, T. N.)4; Li, JY (Li, J. Y.); Zhang, J (Zhang, J.); Hou, KJ (Hou, K. J.)
刊名	PRECAMBRIAN RESEARCH
	2011
卷号	187 期号:1-2 页码:79-98
关键词	Altai-Mongolia Central Asian Orogenic Belt peri-Gondwana Zircon U-Pb age Zircon hafnium isotope
ISSN号	0301-9268
英文摘要	Understanding the tectonic nature of the Altai-Mongolia terrane is significant in tectonic reconstruction of the Central Asian Orogenic Belt (CAOB), a Paleozoic accretionary one similar to the present-day SW Pacific archipelago. Uncertainty in stratigraphic frame of this terrane has led to many controversies in tectonic interpretation. New zircon U-Pb ages, along with previously published geological data help us to build a simplified stratigraphic frame, consisting of (1) the Middle to Upper Cambrian clastic turbidite intercalated with bimodal volcanics, and (2) the Devonian arc-like volcanics and shallow marine sediments. New geochemical data for the meta-basalts suggests that the bimodal volcanics are rift-affinity. Detrital or xenocrytic zircon U-Pb data, combined with zircon epsilon(Hf)(t) results reveals that the Altai-Mongolia terrane has a similar Neoproterozoic to Early Paleozoic tectonothermal history in comparison with the Cadomian-Avalonian orogenic belt. This similarity suggests that the Altai-Mongolia terrane likely is a peri-Gondwana one separated from the northern margin (at present geographic coordinate) of Gondwana during the Middle to Late Cambrian. The rifting might have led to the generation of a branch of the Paleoasian Ocean, an eastern equivalence of the Rheic Ocean. The Silurian to Devonian northward subduction (at present geographic coordinate) of the Paleoasian oceanic crust has given rise to an Andean type arc along the southern margin of the Altai-Mongolia terrane. New magmatic zircon U-Pb ages combined with zircon epsilon(Hf)(t) and REE results suggest that the Silurian to Devonian arc-like magma were generally derived from the depleted mantle. Our findings shed some light on tectonic reconstruction of central Eurasia and allow its comparison with some pre-Variscan massifs in Europe. (C) 2011 Elsevier B.V. All rights reserved.
学科主题	地质年代学
WOS关键词	EAST EUROPEAN CRATON ; IN-SITU ANALYSIS ; LA-ICP-MS ; CHINESE ALTAI ; TECTONIC EVOLUTION ; NORTHWEST CHINA ; PALEOZOIC ACCRETIONARY ; SOUTHERN ALTAIDS ; TRACE-ELEMENTS ; OSSA-MORENA
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000290745900005
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39374]
专题	中国地质调查局
作者单位	1.[Yang, T. N. 2.Li, J. Y. 3.Zhang, J.] Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China [Hou, K. J.] Chinese Acad Geol Sci, Inst Mineral Resource, Beijing 100037, Peoples R China 4.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Yang, TN ,Li, JY ,Zhang, J ,et al. The Altai-Mongolia terrane in the Central Asian Orogenic Belt (CAOB): A peri-Gondwana one? Evidence from zircon U-Pb, Hf isotopes and REE abundance[J]. PRECAMBRIAN RESEARCH,2011,187(1-2):79-98.
APA	Yang, TN ,Li, JY ,Zhang, J ,&Hou, KJ .(2011).The Altai-Mongolia terrane in the Central Asian Orogenic Belt (CAOB): A peri-Gondwana one? Evidence from zircon U-Pb, Hf isotopes and REE abundance.PRECAMBRIAN RESEARCH,187(1-2),79-98.
MLA	Yang, TN ,et al."The Altai-Mongolia terrane in the Central Asian Orogenic Belt (CAOB): A peri-Gondwana one? Evidence from zircon U-Pb, Hf isotopes and REE abundance".PRECAMBRIAN RESEARCH 187.1-2(2011):79-98.