Polyphase tectonothermal events recorded in "metamorphic basement" from the Altyn Tagh, the southeastern margin of the Tarim basin, western China Constraint from U-Pb zircon geochronology

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	Polyphase tectonothermal events recorded in "metamorphic basement" from the Altyn Tagh, the southeastern margin of the Tarim basin, western China Constraint from U-Pb zircon geochronology
	Zhang, JX (Zhang JianXin); Li, HK (Li HuaiKun); Meng, FC (Meng FanCong); Xiang, ZQ (Xiang ZhenQun); Yu, SY (Yu ShengYao); Li, JP (Li JinPing)
刊名	ACTA PETROLOGICA SINICA
	2011
卷号	27 期号:1 页码:23-46
关键词	Tarim basin Altyn Tagh Metamorphic basement Zircon U-Pb dating Tectonic thermal event
ISSN号	1000-0569
英文摘要	The Altyn Tagh, located on the southeastern margin of the Tarim basin, is a main region where metamorphic basement of the Tarim craton is exposed. In this paper, zircon U-Pb isotopic data of sedimentary rocks unconformably overlying on Archaean-Early Paleoproterozoic metamorphic basement and high grade metamorphic rocks from the Cental-South Altyn Tagh are used to investigate the nature and ployphase tectonothermal events of the metamorphic basement in the southeastern margin of the Tarim basin. Detrital zircons from Neoproterozoic Annanba Group overlying on the Tarim basement yield mainly an age at ca. 1. 92Ga, with a few grains between 2. 0Ga and 2. 4Ga, suggesting that detrital material of the Annanban Group shed from the underlying Milan Group and associated plutonic rocks. In the Central Altyn Tagh massif and South Altyn Tagh subduction-collision complex belt, zircon U-Pb chronological data show that high grade metamorphic rocks recorded three phase tectonothermal events; Early Neoproterozoic event (900 similar to 940Ma), Late Neoproterozoic event (760Ma) and Early Paleozoic event. Early Neoproterozoic tectonothermal event can be linked to the Tarim (or Jinning) orogeny, which was commonly recognized in the metamorphic basement around the Tarim basin and the South China block (Or Yangtze craton), and was related to the formation of the Rodinia supercontinent. Late Neoproterozoic tectonothermal event has been also commonly recognized around the Tarim basin and Yangtze craton and was related to the breakup of Rodinia supercontinent. Therefore, in Neoproterozoic era, the Altyn Tagh has a similar evolution history to the Yangtze craton, differing from the North China craton. Zircon U-Pb chronological data also indicate that the high grade metamorphic rocks from the Central-South Altyn Tagh commonly experienced Early Paleozoic metamorphic overprint related to subduction and collision.
学科主题	变质岩岩石学
WOS关键词	NORTHEASTERN TIBETAN PLATEAU ; NW CHINA ; NORTHWEST CHINA ; BEARING GARNET ; AGE ; GEOCHEMISTRY ; COMPLEX ; ALTUN ; BLOCK ; SOUTH
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000287822100002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39340]
专题	中国地质调查局
作者单位	China Geol Survey, Tianjin Inst Geol & Mineral Resources, Tianjin 300170, Peoples R China
推荐引用方式 GB/T 7714	Zhang, JX ,Li, HK ,Meng, FC ,et al. Polyphase tectonothermal events recorded in "metamorphic basement" from the Altyn Tagh, the southeastern margin of the Tarim basin, western China Constraint from U-Pb zircon geochronology[J]. ACTA PETROLOGICA SINICA,2011,27(1):23-46.
APA	Zhang, JX ,Li, HK ,Meng, FC ,Xiang, ZQ ,Yu, SY ,&Li, JP .(2011).Polyphase tectonothermal events recorded in "metamorphic basement" from the Altyn Tagh, the southeastern margin of the Tarim basin, western China Constraint from U-Pb zircon geochronology.ACTA PETROLOGICA SINICA,27(1),23-46.
MLA	Zhang, JX ,et al."Polyphase tectonothermal events recorded in "metamorphic basement" from the Altyn Tagh, the southeastern margin of the Tarim basin, western China Constraint from U-Pb zircon geochronology".ACTA PETROLOGICA SINICA 27.1(2011):23-46.