Zircon U-Pb dating and in-situ Hf isotopic analysis of Permian peraluminous granite in the Lhasa terrane, southern Tibet: Implications for Permian collisional orogeny and paleogeography

doi:10.1016/j.tecto.2009.01.017

	Zircon U-Pb dating and in-situ Hf isotopic analysis of Permian peraluminous granite in the Lhasa terrane, southern Tibet: Implications for Permian collisional orogeny and paleogeography
	Zhu, Di-Cheng 1; Mo, Xuan-Xue 1; Niu, Yaoling 2; Zhao, Zhi-Dan 1; Wang, Li-Quan 3; Pan, Gui-Tang 3; Wu, Fu-Yuan 4
刊名	TECTONOPHYSICS
	2009-04-20
卷号	469 期号:1-4 页码:48-60
关键词	Strongly peraluminous granite Permian syncollisional orogeny Gondwana reconstruction Lhasa terrane Southern Tibet
ISSN号	0040-1951
DOI	10.1016/j.tecto.2009.01.017
文献子类	Article
英文摘要	The Lhasa terrane has long been interpreted as a simple tectonic block rifted from Gondwana during the late Paleozoic and then drifted northward before finally amalgamating with the Qiangtang terrane during the Early Cretaceous. In this paper we document Permian peraluminous granites near Pikang in the southern margin of the central Lhasa terrane, close to the recently documented Songdo eclogite of Permian age. Zircon SHRIMP and LA-ICPMS U-Pb dating for a Pikang granite sample gives an identical crystallization age of about 263 Ma and a wide age range of inherited zircons (283-2141 Ma). In situ Hf isotopic analyses for 20 zircons of 263 Ma yielded epsilon(Hf(t)) values of -4.5 to +1.9. The Pikang granites have high A/CNK values ( >= 1.08) and high normative corundum (1.3-2.0%), indicative of peraluminous S-type granite. They are characterized by moderately negative Eu anomalies (Eu/Eu*=0.48-0.61), and strongly negative Ba, Nb, Sr, P and Ti anomalies. The granites have high epsilon(Nd(t)) values (-6.4 to -6.0) and low initial (87)Sr/(86)Sr ratios (0.7082-0.7096) relative to melts derived from mature continental crust. These rocks are interpreted to have been generated by mixing between mantle melts and their induced melting of mature crustal materials. We interpret the Pikang peraluminous granite magmatism, the regional angular unconformity between the Middle and the Upper Permian and the eclogite of the same metamorphic age (similar to 262 Ma) from the same geotectonic location to represent different products of a common event in time and space. We tentatively term this common event as syncollisional orogeny, i.e., "the Permian Gangdese Orogeny". We further hypothesize that the orogeny may be genetically associated with the collision between the Lhasa terrane and the northern margin of Australia, following the closure of the Paleo-Tethyan Ocean south of the Lhasa terrane. (C) 2009 Elsevier B.V. All rights reserved.
WOS关键词	PLATE TECTONIC MODEL ; LACHLAN FOLD BELT ; VOLCANIC-ROCKS ; LU-HF ; GEOCHEMICAL CHARACTERISTICS ; GANGDESE BATHOLITH ; SOUTHEASTERN TIBET ; EVOLUTION ; CONSTRAINTS ; CHINA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000265990100005
资助机构	Ministry of Land and Resources ; Ministry of Land and Resources ; Chinese NSF(40572051 ; Chinese NSF(40572051 ; Chinese 111 Project(B0701) ; Chinese 111 Project(B0701) ; Qinghai-Tibetan Plateau of the China Geological Survey ; Qinghai-Tibetan Plateau of the China Geological Survey ; Leverhulme Trust ; Leverhulme Trust ; 40503005) ; 40503005) ; Ministry of Land and Resources ; Ministry of Land and Resources ; Chinese NSF(40572051 ; Chinese NSF(40572051 ; Chinese 111 Project(B0701) ; Chinese 111 Project(B0701) ; Qinghai-Tibetan Plateau of the China Geological Survey ; Qinghai-Tibetan Plateau of the China Geological Survey ; Leverhulme Trust ; Leverhulme Trust ; 40503005) ; 40503005) ; Ministry of Land and Resources ; Ministry of Land and Resources ; Chinese NSF(40572051 ; Chinese NSF(40572051 ; Chinese 111 Project(B0701) ; Chinese 111 Project(B0701) ; Qinghai-Tibetan Plateau of the China Geological Survey ; Qinghai-Tibetan Plateau of the China Geological Survey ; Leverhulme Trust ; Leverhulme Trust ; 40503005) ; 40503005) ; Ministry of Land and Resources ; Ministry of Land and Resources ; Chinese NSF(40572051 ; Chinese NSF(40572051 ; Chinese 111 Project(B0701) ; Chinese 111 Project(B0701) ; Qinghai-Tibetan Plateau of the China Geological Survey ; Qinghai-Tibetan Plateau of the China Geological Survey ; Leverhulme Trust ; Leverhulme Trust ; 40503005) ; 40503005)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/70996]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhu, Di-Cheng
作者单位	1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 2.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England 3.Chengdu Inst Geol & Mineral Resources, Chengdu 610082, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Di-Cheng,Mo, Xuan-Xue,Niu, Yaoling,et al. Zircon U-Pb dating and in-situ Hf isotopic analysis of Permian peraluminous granite in the Lhasa terrane, southern Tibet: Implications for Permian collisional orogeny and paleogeography[J]. TECTONOPHYSICS,2009,469(1-4):48-60.
APA	Zhu, Di-Cheng.,Mo, Xuan-Xue.,Niu, Yaoling.,Zhao, Zhi-Dan.,Wang, Li-Quan.,...&Wu, Fu-Yuan.(2009).Zircon U-Pb dating and in-situ Hf isotopic analysis of Permian peraluminous granite in the Lhasa terrane, southern Tibet: Implications for Permian collisional orogeny and paleogeography.TECTONOPHYSICS,469(1-4),48-60.
MLA	Zhu, Di-Cheng,et al."Zircon U-Pb dating and in-situ Hf isotopic analysis of Permian peraluminous granite in the Lhasa terrane, southern Tibet: Implications for Permian collisional orogeny and paleogeography".TECTONOPHYSICS 469.1-4(2009):48-60.