Petrogenesis of Paleocene-Eocene porphyry deposit-related granitic rocks in the Yaguila-Sharang ore district, central Lhasa terrane, Tibet

doi:10.1016/j.jseaes.2016.08.004

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院矿产资源研究重点实验室

	Petrogenesis of Paleocene-Eocene porphyry deposit-related granitic rocks in the Yaguila-Sharang ore district, central Lhasa terrane, Tibet
	Zhao, Junxing 1,2; Li, Guangming 1; Evans, Noreen J.3; Qin, Kezhang 1; Li, Jinxiang 4; Zhang, Xia'nan 1
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2016-11-01
卷号	129 页码:38-53
关键词	Petrogenesis Magma oxidation state Zircon trace elements Porphyry deposit Tibet
DOI	10.1016/j.jseaes.2016.08.004
文献子类	Article
英文摘要	The Paleocene-Eocene ore deposits in the Gangdese Metallogenic Belt, Tibet, are thought to have been formed during the main period of India-Asia continental collision. This paper reports the whole-rock major element, trace element, and Sr-Nd-Hf isotopic compositions and zircon trace element contents of volcanic and intrusive rocks from the Paleocene Yaguila skarn Pb-Zn-Ag deposit and adjacent Eocene Sharang porphyry Mo deposit in the central Lhasa terrane, Tibet. Geochemical signatures and Sr-Nd-Hf isotopic compositions indicate that the Yaguila Cretaceous rhyolitic rocks were formed by the melting of ancient continental crust, whereas the Paleocene causative granite porphyry may have resulted from the interaction between mantle-derived and crustal-derived materials when continental collision was initiated. The dramatic increase of epsilon(Nd)(t) values between emplacement of the granite porphyry and later porphyritic biotite granite suggests a greater involvement of mantle materials during the crystallization of the barren biotite granite stock. The post-ore Miocene granodiorite porphyry has a similar geochemical signature to the Sharang Miocene dykes, suggesting they were both generated from melting of enriched lithospheric mantle. Nd-Hf mixing calculations indicate an increasing contribution of mantle materials in Paleocene to Eocene intrusions, consistent with the regional tectonic model of Neo-Tethyan oceanic slab roll-back and break-off. Zircons from both the Yaguila and Sharang ore-related porphyries have higher Ce anomalies than those from the barren granitoids, suggesting that Mo mineralization was closely related to highly oxidized and differentiated magma. The fertile intrusions in the Yaguila-Sharang district contain Eu-N/Eu*(N) values from 0.3 to 0.6, higher than the non-mineralized intrusions. The processes of early crystallization of plagioclase and/or SO2-degassing from underlying magma can explain the observed negative Eu anomalies in zircon. (C) 2016 Elsevier Ltd. All rights reserved.
WOS关键词	ZIRCON U-PB ; CONTINENTAL COLLISION ZONES ; HF ISOTOPIC CONSTRAINTS ; CENOZOIC VOLCANIC-ROCKS ; INDIA-ASIA COLLISION ; LA-ICP-MS ; SOUTHERN TIBET ; TRACE-ELEMENT ; LOWER CRUST ; OXIDATION-STATE
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000390076200004
资助机构	National Nature Science Foundation of China (NSFC)(41402080) ; National Nature Science Foundation of China (NSFC)(41402080) ; General Financial Grant from China Postdoctoral Science Foundation(2014M550836) ; General Financial Grant from China Postdoctoral Science Foundation(2014M550836) ; State Scholarship Fund by China Scholarship Council ; State Scholarship Fund by China Scholarship Council ; Strategic Priority Research Program of Chinese Academy of Sciences(XDB03010303) ; Strategic Priority Research Program of Chinese Academy of Sciences(XDB03010303) ; National Nature Science Foundation of China (NSFC)(41402080) ; National Nature Science Foundation of China (NSFC)(41402080) ; General Financial Grant from China Postdoctoral Science Foundation(2014M550836) ; General Financial Grant from China Postdoctoral Science Foundation(2014M550836) ; State Scholarship Fund by China Scholarship Council ; State Scholarship Fund by China Scholarship Council ; Strategic Priority Research Program of Chinese Academy of Sciences(XDB03010303) ; Strategic Priority Research Program of Chinese Academy of Sciences(XDB03010303)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53178]
专题	地质与地球物理研究所_中国科学院矿产资源研究重点实验室
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beitucheng West Rd 19, Beijing 100029, Peoples R China 2.James Cook Univ, Sch Earth & Environm Sci, Econ Geol Res Ctr EGRU, Townsville, Qld 4811, Australia 3.Curtin Univ, Dept Appl Geol, TIGeR, John de Laeter Ctr, Perth, WA 6945, Australia 4.Chinese Acad Sci, Key Lab Continental Collis & Plateau Uplift, Inst Qinghai Tibetan Plateau Res, 4A Datun Rd, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Junxing,Li, Guangming,Evans, Noreen J.,et al. Petrogenesis of Paleocene-Eocene porphyry deposit-related granitic rocks in the Yaguila-Sharang ore district, central Lhasa terrane, Tibet[J]. JOURNAL OF ASIAN EARTH SCIENCES,2016,129:38-53.
APA	Zhao, Junxing,Li, Guangming,Evans, Noreen J.,Qin, Kezhang,Li, Jinxiang,&Zhang, Xia'nan.(2016).Petrogenesis of Paleocene-Eocene porphyry deposit-related granitic rocks in the Yaguila-Sharang ore district, central Lhasa terrane, Tibet.JOURNAL OF ASIAN EARTH SCIENCES,129,38-53.
MLA	Zhao, Junxing,et al."Petrogenesis of Paleocene-Eocene porphyry deposit-related granitic rocks in the Yaguila-Sharang ore district, central Lhasa terrane, Tibet".JOURNAL OF ASIAN EARTH SCIENCES 129(2016):38-53.