Geochronology, geochemistry, and zircon Hf isotopic compositions of Mesozoic intermediate-felsic intrusions in central Tibet: Petrogenetic and tectonic implications
文献类型：期刊论文
| 作者 | Li, Jin-Xiang1,2,3; Qin, Ke-Zhang3; Li, Guang-Ming3; Richards, Jeremy P.2; Zhao, Jun-Xing3; Cao, Ming-Jian3 |
| 刊名 | LITHOS
 |
| 出版日期 | 2014-06-01 |
| 卷号 | 198页码:77-91 |
| 关键词 | Geochronology Zircon Hf isotopes Jurassic-Cretaceous Granitoids Petrogenesis Tibet |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2014.03.025 |
| 文献子类 | Article |
| 英文摘要 | Mesozoic intermediate-felsic intrusions are widely distributed in the southern Qiangtang terrane, central Tibet. Zircon U-Pb dating shows that these intrusions formed in two periods in the Jurassic (169-150 Ma) and Cretaceous (127-113 Ma). They mostly belong to the high-K calc-alkaline series, and show strong enrichments in large ion lithophile elements (e.g., Cs, Rb, and K), depletions in Nb,Ta, and Ti, and negative Ba anomalies on primitive mantle-normalized diagrams. P2O5 contents decrease with increasing SiO2 content, and Th contents increase with increasing Rb content, consistent with the evolution trend of l-type magmas. These intrusions show a wide range of zircon epsilon Hf(t) values from -19.4 to 11.2, including in rocks with similar SiO2 contents, suggesting variable contributions from mantle and Qiangtang crustal sources. Fine-grained mafic to intermediate igneous enclaves in Jurassic intrusions have similar zircon U-Pb ages and similar or slightly higher zircon sHf(t) values to the host rocks, suggesting that the enclave magmas were derived from mixed magmas at depth and injected into more evolved magmas in upper crustal magma chambers. Magma mixing is also supported by the wide range of zircon Hf isotopic compositions (epsilon Hf(t) = -19.4 to 2.5) from within individual Jurassic and Cretaceous intrusions, and Jurassic enclaves. The Jurassic-Cretaceous magmas likely formed in a continental arc setting during subduction of the Bangong-Nujiang ocean between 170 and 110 Ma, and evolved in the upper plate crust by MASH processes. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS关键词 | U-PB GEOCHRONOLOGY ; BANGONG-NUJIANG SUTURE ; EAST-WEST EXTENSION ; CU-AU DEPOSIT ; SOUTHERN TIBET ; VOLCANIC-ROCKS ; TRACE-ELEMENT ; LOWER CRUST ; LU-HF ; NORTHWESTERN TIBET |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000337851100006 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | "Strategic Priority Research Program" of the Chinese Academy of Sciences(XDB03010303) ; "Strategic Priority Research Program" of the Chinese Academy of Sciences(XDB03010303) ; Tibetan Large Deposit Metallogenic Specialization(1212011221073) ; Tibetan Large Deposit Metallogenic Specialization(1212011221073) ; Natural Science Foundation Project(41072059) ; Natural Science Foundation Project(41072059) ; Post-doc Funding Program of the China Scholarship Council/University of Alberta(2010491243) ; Post-doc Funding Program of the China Scholarship Council/University of Alberta(2010491243) ; "Strategic Priority Research Program" of the Chinese Academy of Sciences(XDB03010303) ; "Strategic Priority Research Program" of the Chinese Academy of Sciences(XDB03010303) ; Tibetan Large Deposit Metallogenic Specialization(1212011221073) ; Tibetan Large Deposit Metallogenic Specialization(1212011221073) ; Natural Science Foundation Project(41072059) ; Natural Science Foundation Project(41072059) ; Post-doc Funding Program of the China Scholarship Council/University of Alberta(2010491243) ; Post-doc Funding Program of the China Scholarship Council/University of Alberta(2010491243) ; "Strategic Priority Research Program" of the Chinese Academy of Sciences(XDB03010303) ; "Strategic Priority Research Program" of the Chinese Academy of Sciences(XDB03010303) ; Tibetan Large Deposit Metallogenic Specialization(1212011221073) ; Tibetan Large Deposit Metallogenic Specialization(1212011221073) ; Natural Science Foundation Project(41072059) ; Natural Science Foundation Project(41072059) ; Post-doc Funding Program of the China Scholarship Council/University of Alberta(2010491243) ; Post-doc Funding Program of the China Scholarship Council/University of Alberta(2010491243) ; "Strategic Priority Research Program" of the Chinese Academy of Sciences(XDB03010303) ; "Strategic Priority Research Program" of the Chinese Academy of Sciences(XDB03010303) ; Tibetan Large Deposit Metallogenic Specialization(1212011221073) ; Tibetan Large Deposit Metallogenic Specialization(1212011221073) ; Natural Science Foundation Project(41072059) ; Natural Science Foundation Project(41072059) ; Post-doc Funding Program of the China Scholarship Council/University of Alberta(2010491243) ; Post-doc Funding Program of the China Scholarship Council/University of Alberta(2010491243) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/85536]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Li, Jin-Xiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100085, Peoples R China 2.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jin-Xiang,Qin, Ke-Zhang,Li, Guang-Ming,et al. Geochronology, geochemistry, and zircon Hf isotopic compositions of Mesozoic intermediate-felsic intrusions in central Tibet: Petrogenetic and tectonic implications[J]. LITHOS,2014,198:77-91. |
| APA | Li, Jin-Xiang,Qin, Ke-Zhang,Li, Guang-Ming,Richards, Jeremy P.,Zhao, Jun-Xing,&Cao, Ming-Jian.(2014).Geochronology, geochemistry, and zircon Hf isotopic compositions of Mesozoic intermediate-felsic intrusions in central Tibet: Petrogenetic and tectonic implications.LITHOS,198,77-91. |
| MLA | Li, Jin-Xiang,et al."Geochronology, geochemistry, and zircon Hf isotopic compositions of Mesozoic intermediate-felsic intrusions in central Tibet: Petrogenetic and tectonic implications".LITHOS 198(2014):77-91. |
入库方式： OAI收割
来源：地质与地球物理研究所
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