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学科主题: Geochemistry & Geophysics ; Mineralogy
题名: Zircon U-Pb geochronology and Sr-Nd-Hf isotopic compositions of the Yuanzhuding granitoid porphyry within the Shi-Hang Zone, South China: Petrogenesis and implications for Cu-Mo mineralization
作者: [Zhong, Lifeng] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China ; [Li, Jie ; Peng, Touping] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China ; [Xia, Bin] Sun Yat Sen Univ, Guangdong Higher Educ Inst, Key Lab Offshore Oil Explorat & Dev, Guangzhou 510006, Guangdong, Peoples R China ; [Liu, Liwen] Guangdong Bur Geol Explorat, Geol Team 719, Zhaoqing 526020, Peoples R China
通讯作者: zhonglf@scsio.ac.cn
关键词: Sr-Nd-Hf isotopes ; Adakitic rock ; Yuanzhuding porphyry ; Cu-Mo deposit ; Shi-Hang Zone ; South China
刊名: LITHOS
发表日期: 2013
卷: 177, 页:402-415
部门归属: 海洋地质
资助者: We are grateful to Dr. Taiping Zhao, Yan Wang and Xiaoping Long for their helpful discussions. Xianglin Tu, Yanyan Zhou and Xiuguang Lin are thanked for their assistance with laboratory-based research and fieldwork. The manuscript benefited greatly from the constructive comments of two anonymous reviewers and the editor-in-chief Prof. Nelson Eby. Thanks also go to Dr. Aaron Stallard of New Zealand for proofreading the language of this manuscript. Financial support was provided by the National Natural Science Foundation of China (U1133002; 41172095; 41272126; 41173038), and by the Chinese Academy of Sciences (GIGCAS-135-Y234151001).
摘要: The Shi-Hang Zone is an important NE-SW-trending Mesozoic magmatic belt in South China, which is dominated by granites with relatively high epsilon(Nd)(t) values and young T-DM model ages. Here, we present laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) zircon U-Pb ages, major and trace element compositions, and Sr-Nd-Hf isotope data for the Yuanzhuding porphyritic granitoids within the southwestern Shi-Hang Zone, and use these data to determine the origin of this granitoid and its relationship with Cu-Mo mineralization. Zircon U-Pb dating indicates that these granitoids were emplaced at 157.8 +/- 1.1 Ma. They have initial Sr-87/Sr-86 ratios of 0.70941-0.71398, epsilon(Nd)(t) values of -3.15 to -2.02, and in situ zircon epsilon(Hf)(t) values of +1.71 to +6.17. Geochemically, most of them are high-K calc-alkaline and show an adakitic affinity. They are more likely emplaced in a continental arc setting related to westward subduction of the paleo-Pacffic plate. Their parental magma originated chiefly from the overlying sediments of the downgoing slab, and subsequently interacted with the lithospheric mantle wedge at the temperatures of similar to 790 degrees C. High oxygen fugacity during magmatic evolution played a crucial role in the development of Cu-Mo mineralization within the Yuanzhuding. The discovery of the Yuanzhuding deposit implies that the Chenzhou-Huaiji fault belt is most likely prospective for mineral exploration for porphyry Cu-Mo deposits. (C) 2013 Elsevier B.V. All rights reserved.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000324721000025
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/11119
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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[Zhong, Lifeng] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Li, Jie; Peng, Touping] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China; [Xia, Bin] Sun Yat Sen Univ, Guangdong Higher Educ Inst, Key Lab Offshore Oil Explorat & Dev, Guangzhou 510006, Guangdong, Peoples R China; [Liu, Liwen] Guangdong Bur Geol Explorat, Geol Team 719, Zhaoqing 526020, Peoples R China.Zircon U-Pb geochronology and Sr-Nd-Hf isotopic compositions of the Yuanzhuding granitoid porphyry within the Shi-Hang Zone, South China: Petrogenesis and implications for Cu-Mo mineralization,LITHOS,2013,177():402-415
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