Disclosing the most intense magmatic flare-up in southern Tibet: Insights from study of the Pangduo volcanic-plutonic complex
文献类型：期刊论文
| 作者 | Chen, Hou-Bin1,2; Ji, Wei-Qiang1; Zhang, Shao-Hua1,2; Jiang, Hehe1; Xu, Qiang1,2 |
| 刊名 | LITHOS
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 454页码:15 |
| ISSN号 | 0024-4937 |
| 关键词 | Gangdese arc Southern Tibet Pangduo volcanic -plutonic complex Magmatic process Flare-up |
| DOI | 10.1016/j.lithos.2023.107267 |
| 英文摘要 | The Gangdese arc underwent the most intense magmatic flare-up of southern Tibet in the early Eocene (peaked at similar to 50 Ma), generating widespread plutonic and volcanic rocks both along and across the arc. However, the dynamic mechanism for the magmatic flare-up is mysterious. This paper systematically analyzed the petrology, mineralogy, geochronology, and geochemistry of the early Eocene volcanic and intrusive rocks in the Pangduo basin in the eastern Gangdese arc. These rocks yielded identical zircon U-Pb ages of similar to 50 Ma and similar isotopic compositions. The low-silica (< 60 wt%) rocks, including basalt andesite and trachyandesite, result from low degree (2-3%) partial melting of garnet-bearing lithospheric mantle. Based on textural observations and geochemical studies, coupled with Rhyolite-MELTS modeling and zircon trace elements Rayleigh fractionation models, the following research results were obtained. The high-silica rhyolite, ignimbrite, and granite porphyry are the product of limited melt extraction, while the quartz monzonite belongs to the associated residual silicic cumulates. The quartz monzonitic porphyry and trachydacite show a widespread dissolution structure and high formation temperature of similar to 850 degrees C. Whole-rock geochemical mixing model results indicate that they are generated by mixing products of mafic magma, high-silica melts, and remelting melts of quartz monzonite. The volcanic and intrusive rocks in the Pangduo basin are considered as a volcanic-plutonic complex, resulting from the synergistic effect of melt extraction and cognate magma mixing. Both the complex magmatic processes and the early Eocene magmatic flare-up are attributed to mafic magma injection. |
| WOS关键词 | ISOTOPIC CONSTRAINTS ; GANGDESE BATHOLITH ; NEOTETHYAN SLAB ; PB AGE ; ROCKS ; GEOCHEMISTRY ; RESERVOIRS ; BASALTS ; ORIGIN ; GROWTH |
| 资助项目 | National Key R & D Program of China[2022YFF0800800] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[42072078] ; Key Research Program of the Institute of Geology and Geophysics, CAS[IGGCAS-202204] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001062455300001 |
| 资助机构 | National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110830]  |
| 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 | Ji, Wei-Qiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Hou-Bin,Ji, Wei-Qiang,Zhang, Shao-Hua,et al. Disclosing the most intense magmatic flare-up in southern Tibet: Insights from study of the Pangduo volcanic-plutonic complex[J]. LITHOS,2023,454:15. |
| APA | Chen, Hou-Bin,Ji, Wei-Qiang,Zhang, Shao-Hua,Jiang, Hehe,&Xu, Qiang.(2023).Disclosing the most intense magmatic flare-up in southern Tibet: Insights from study of the Pangduo volcanic-plutonic complex.LITHOS,454,15. |
| MLA | Chen, Hou-Bin,et al."Disclosing the most intense magmatic flare-up in southern Tibet: Insights from study of the Pangduo volcanic-plutonic complex".LITHOS 454(2023):15. |
入库方式： OAI收割
来源：地质与地球物理研究所
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