Zircon U-Pb age, origin and its tectonic significances of Huitongshan Devonian K-feldspar granites from Beishan orogen, NW China

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	Zircon U-Pb age, origin and its tectonic significances of Huitongshan Devonian K-feldspar granites from Beishan orogen, NW China
	Li, S (Li Shan); Wang, T (Wang Tao); Tong, Y (Tong Ying); Wang, YB (Wang YanBin); Hong, DW (Hong DaWei); Ouyang, ZX (Ouyang ZhiXia)
刊名	ACTA PETROLOGICA SINICA
	2011
卷号	27 期号:10 页码:3055-3070
关键词	Zircon U-Pb dating High-fractonated I-A type granite Sr, Nd, Hf isotope Tectonic setting Beishan orogen
ISSN号	1000-0569
英文摘要	LA-ICP-MS zircon U-Pb dating yields a (206)Pb/(238)U age of 397 +/- 3Ma (MSWD = 1. 1) for the Huitongshan K-feldspar granite, and is interpreted as the emplacement age. Major and trace elements show a transition feature from high-K calc-alaline or high-fractonated I-type granite to A-type granite. Their epsilon(Nd) (t) values are between -1. 3 and +1. 2, t(DM) values of 960Ma to 1530Ma; zircon epsilon(Hf) (t) values from -1. 0 to +5. 8, and t(DM2) from 1024Ma to 1455Ma. Integration analysis of structural pattern, geochronology, geochemistry and Sr-Nd-Hf isotope, as well as regional geology suggest that this granitic pluton was emplaced in a post-orogenic setting or a late stage of syn-orogenic setting. The granitic magmas were, probably originated from crystallization/differentiation of earlier calcalkaline granodioritic magmas formed by partial melting of juvenile crust ( maybe oceanic crust, island arc or accretionary wedge) due to underplated mantle-derived magmas. Early-middle Devonian granites show associate characteristics of high-fractonated I-type, I-A type and A-type. Therefore, Paleozoic magmatism transformed from syn-orogenic I/S type into I-A type feature at about 397 Ma in the Beishan area and tectonic setting has transformed into a post-orogenic extensional setting or a late-stage of syn-orogenic setting.
学科主题	构造地质学
WOS关键词	EASTERN TIANSHAN MOUNTAINS ; ND ISOTOPIC EVIDENCE ; PALEO-ASIAN OCEAN ; CONTINENTAL-CRUST ; VERTICAL GROWTH ; GANSU PROVINCE ; GEOCHEMICAL CHARACTERISTICS ; NORTHERN XINJIANG ; MONGOLIAN BORDER ; ADJACENT REGIONS
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000296655800021
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39385]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Li, S ,Wang, T ,Tong, Y ,et al. Zircon U-Pb age, origin and its tectonic significances of Huitongshan Devonian K-feldspar granites from Beishan orogen, NW China[J]. ACTA PETROLOGICA SINICA,2011,27(10):3055-3070.
APA	Li, S ,Wang, T ,Tong, Y ,Wang, YB ,Hong, DW ,&Ouyang, ZX .(2011).Zircon U-Pb age, origin and its tectonic significances of Huitongshan Devonian K-feldspar granites from Beishan orogen, NW China.ACTA PETROLOGICA SINICA,27(10),3055-3070.
MLA	Li, S ,et al."Zircon U-Pb age, origin and its tectonic significances of Huitongshan Devonian K-feldspar granites from Beishan orogen, NW China".ACTA PETROLOGICA SINICA 27.10(2011):3055-3070.