Nature and Evolution of Crust in Southern Lhasa, Tibet: Transformation From Microcontinent to Juvenile Terrane
文献类型：期刊论文
| 作者 | Ma, Lin1,2; Kerr, Andrew C.2; Wang, Qiang1,3,4; Jiang, Zi-Qi1; Tang, Gong-Jian1,3; Yang, Jin-Hui5; Xia, Xiao-Ping1; Hu, Wan-Long1,4; Yang, Zong-Yong1,4; Sun, Peng1,4 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2019-07-01 |
| 卷号 | 124期号:7页码:6452-6474 |
| ISSN号 | 2169-9313 |
| 关键词 | Late Paleozoic bimodal magmatism paleogeographic crustal evolution southern Lhasa |
| DOI | 10.1029/2018JB017106 |
| 英文摘要 | The nature and pre-Cenozoic evolution history of crust in southern Lhasa, which is crucial for our understanding of Indo-Asian continental collision and Tibetan uplift during the Cenozoic, remains controversial due to a "missing" pre-Mesozoic magmatic record. In this contribution, we report petrological and geochemical data for newly identified Paleozoic bimodal magmatism in the Zhengga area of southern Tibet. The magmatism comprises Late Devonian-Early Carboniferous (366-353 Ma) amphibolite and two-mica gneissic granite. The protoliths of the Zhengga amphibolite were gabbro and diorite with low SiO2 and high MgO, Cr, and Ni contents with high epsilon(Nd)(t) values of +3.3 to +8.0, variable and positive zircon epsilon(Hf)(t) of +0.9 to +11.2, and low zircon delta O-18 of 5.7 +/- 0.2 parts per thousand. These protoliths are proposed to have formed by decompression melting of asthenosphere during intracontinental back-arc extension. In contrast, the granite has relatively high SiO2 and low MgO contents with much lower epsilon(Nd)(t) of -8.6 to -7.3, variable and negative zircon epsilon(Hf)(t) of -10.4 to -1.3, and high zircon delta O-18 of 9.4 0.2 values and was most likely derived from an ancient metasedimentary source. This magma subsequently underwent recharge with minor amounts mafic magma followed by fractional crystallization of K-feldspar in middle-upper crust (similar to 10-20 km) magma chambers. Using our new data, in combination with Nd-Hf isotopes, we present the first comprehensive picture of crustal evolution in southern Lhasa. The southern Lhasa sub-block is likely to have been a microcontinent that underwent extensive Phanerozoic crustal reworking and growth, rather than a Mesozoic-Early Tertiary juvenile accretionary arc terrane. |
| WOS关键词 | ZIRCON U-PB ; CRETACEOUS ISLAND-ARC ; VOLCANIC-ROCKS ; CONTINENTAL-CRUST ; HF-ISOTOPE ; GEOCHEMICAL DISCRIMINATION ; TECTONIC EVOLUTION ; WORKING REFERENCE ; EARLY SUBDUCTION ; MARIANA TROUGH |
| 资助项目 | National Key Research and Development Project[2016YFC0600309] ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences[XDA2007030402] ; National Natural Science Foundation of China[41872062] ; National Natural Science Foundation of China[91855215] ; National Natural Science Foundation of China[41630208] ; Second Tibetan Plateau Scientific Expedition and Research (STEP)[2019QZKK0702] ; Key Program of the Chinese Academy of Sciences[QYZDJ-SSW-DQC026] ; Key Program of Guangzhou City[201707020032] ; Youth Innovation Promotion Association CAS[2017404] ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 project)[135TP201601] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000481819500014 |
| 资助机构 | National Key Research and Development Project ; National Key Research and Development Project ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; Key Program of Guangzhou City ; Key Program of Guangzhou City ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 project) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 project) ; National Key Research and Development Project ; National Key Research and Development Project ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; Key Program of Guangzhou City ; Key Program of Guangzhou City ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 project) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 project) ; National Key Research and Development Project ; National Key Research and Development Project ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; Key Program of Guangzhou City ; Key Program of Guangzhou City ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 project) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 project) ; National Key Research and Development Project ; National Key Research and Development Project ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; Key Program of Guangzhou City ; Key Program of Guangzhou City ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 project) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 project) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/93332]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Ma, Lin; Wang, Qiang |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Guangdong, Peoples R China 2.Cardiff Univ, Sch Earth & Ocean Sci, Cardiff, S Glam, Wales 3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Earth & Planetary Sci, Beijing, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Lin,Kerr, Andrew C.,Wang, Qiang,et al. Nature and Evolution of Crust in Southern Lhasa, Tibet: Transformation From Microcontinent to Juvenile Terrane[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2019,124(7):6452-6474. |
| APA | Ma, Lin.,Kerr, Andrew C..,Wang, Qiang.,Jiang, Zi-Qi.,Tang, Gong-Jian.,...&Sun, Peng.(2019).Nature and Evolution of Crust in Southern Lhasa, Tibet: Transformation From Microcontinent to Juvenile Terrane.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,124(7),6452-6474. |
| MLA | Ma, Lin,et al."Nature and Evolution of Crust in Southern Lhasa, Tibet: Transformation From Microcontinent to Juvenile Terrane".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 124.7(2019):6452-6474. |
入库方式： OAI收割
来源：地质与地球物理研究所
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