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DOI	10.1016/j.jseaes.2015.02.017
	Petrogenesis and tectonic setting of Triassic granitoids in the Qiangtang terrane, central Tibet: Evidence from U-Pb ages, petrochemistry and Sr-Nd-Hf isotopes
	Li, Guang-Ming; Li, Jin-Xiang; Zhao, Jun-Xing; Qin, Ke-Zhang; Cao, Ming-Jian; Evans, Noreen J.
通讯作者	Li, GM (通讯作者)
发表日期	2015
ISSN	1367-9120
EISSN	1878-5786
起始页码	443
结束页码	455
卷号	105
英文摘要	Triassic granitoids, including the similar to 220 Ma Shuanghu and similar to 210 Ma Rongma granitoids studied here, are widely distributed around the-Longmu-Shuanghu suture and in the Qiangtang terrane, central Tibet. The majority of these granitoids can be classified as high-K calc-alkaline in nature and yield negative Ba and Sr anomalies on primitive mantle-normalized diagrams. In addition, they are: enriched in light rare earth elements (LREE) ((La/Yb)(N) = 1.61-21.79); strongly enriched in large ion lithophile elements (LILE: e.g., Cs, Rb, and K), and depleted in high field strength elements (HFSE: e.g., Nb and Ti). Magma mixing played a role in the genesis of the Shuanghu granodiorites, as indicated by the occurrence of dioritic enclaves and the wide range in zircon Hf compositions (epsilon Hf(t) = -15.0 to -2.5). The I-type Shuanghu granodiorites and S-type Shuanghu and Rongma granites might have been derived from melting of southern Qiangtang crust given the high initial Sr (0.7131-0.7272), low epsilon Nd(t) (-8.9 to -11.1) and zircon epsilon Hf(t) values (-15 to -7.2). The granitoids may have formed during melting of southern Qiangtang crust, heated by upwelling asthenosphere mantle, a result of break-off and delamination of the Paleo-Tethys slab in a collisional setting. (C) 2015 Elsevier Ltd. All rights reserved.
关键词	ZIRCON REFERENCE MATERIAL NORTHERN TIBET LU-HF MASS-SPECTROMETRY ARC MAGMATISM METAMORPHIC BELT VOLCANIC-ROCKS TRACE-ELEMENT PALEO-TETHYS TH-PB
英文关键词	Geochronology; Zircon Hf isotopes; Granitoids; Qiangtang terrane; Tibet
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000355051700029
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258548
推荐引用方式 GB/T 7714	Li, Guang-Ming,Li, Jin-Xiang,Zhao, Jun-Xing,et al. Petrogenesis and tectonic setting of Triassic granitoids in the Qiangtang terrane, central Tibet: Evidence from U-Pb ages, petrochemistry and Sr-Nd-Hf isotopes[J]. 中国科学院青藏高原研究所,2015,105.
APA	Li, Guang-Ming,Li, Jin-Xiang,Zhao, Jun-Xing,Qin, Ke-Zhang,Cao, Ming-Jian,&Evans, Noreen J..(2015).Petrogenesis and tectonic setting of Triassic granitoids in the Qiangtang terrane, central Tibet: Evidence from U-Pb ages, petrochemistry and Sr-Nd-Hf isotopes.JOURNAL OF ASIAN EARTH SCIENCES,105.
MLA	Li, Guang-Ming,et al."Petrogenesis and tectonic setting of Triassic granitoids in the Qiangtang terrane, central Tibet: Evidence from U-Pb ages, petrochemistry and Sr-Nd-Hf isotopes".JOURNAL OF ASIAN EARTH SCIENCES 105(2015).