Petrogenesis and tectonic implications of Middle Triassic basalts and rhyolites in the northern Qiangtang Block, central Tibet
文献类型：期刊论文
| 作者 | Ou, Quan2,3; Wang, Qiang1,2,5; Zeng, Ji-Peng2; Yang, Jin-Hui4; Zhang, Hai-Xiang2; Xia, Xiao-Ping2; Chen, Yi-Wei2 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2021-02-01 |
| 卷号 | 206页码:16 |
| 关键词 | Triassic Basalts and rhyolites Metasomatized mantle Geladandong area Tibet |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2020.104573 |
| 英文摘要 | Triassic magmatic rocks are widely exposed in the northern Qiangtang Block in Tibet. However, their petrogenesis and relationship to the evolution of Tethys Ocean are matters of debate. Here we report zircon U-Pb ages, mineral compositions, whole-rock major and trace elements, and Nd isotope for newly reported Triassic volcanics in order to provide constraints on the formation of these rocks in Tethys ocean's evolution. The volcanic suite consists of grey-porphyritic basalts (B1), black-aphyric basalts (B2), and rhyolites. SIMS, LA-ICPMS zircon U-Pb age dating shows that they were erupted at 237-235 Ma. All rocks show no continuous trends in major-element compositions, and are enriched in Light Rare Earth Elements (LREE) relative to heavy REE (HREE) with various Eu-anomalies. Basalts have narrow epsilon Nd(t) range (-0.90 to -0.01), slightly higher than those of rhyolites (-4.36 to -0.66). Given similar Nd-isotope and REE patterns, B1 and B2 basalts were probably produced from a common parental magma by mineral accumulation and fractional crystallization during late- and early-stages of magma evolution, respectively. Based on indicative element-ratios of slab-derived materials, we suggest that parental magmas of these basalts were derived by partial melting of metasomatized mantle source with subducted oceanic slab component. Rhyolites were generated by partial melting of basaltic lower-crust as a result of underplating by magma that corresponds to the studied basalts. Given spatial-temporal distribution of Triassic magmatic-metamorphic rocks, and geological background, we suggest that magmatism of studied suite was triggered by northward subduction of the Paleo-Tethys ocean, and recorded late-stage of Paleo-Tethys Wilson cycle. |
| WOS关键词 | SLAB-DERIVED MELTS ; TRACE-ELEMENT ; PALEO-TETHYS ; SOUTHERN QIANGTANG ; VOLCANIC-ROCKS ; ISOTOPIC CHARACTERISTICS ; EXPERIMENTAL CONSTRAINTS ; NORTHEASTERN MARGIN ; CONTINENTAL-CRUST ; CHINA EVIDENCE |
| 资助项目 | National Natural Science Foundation of China[41630208] ; National Natural Science Foundation of China[91855215] ; National Natural Science Foundation of China[42021002] ; National Natural Science Foundation of China[41802057] ; Second Tibetan Plateau Scientific Expedition and Research (STEP)[2019QZKK0702] ; National Key R&D Program of China[2016YFC0600407] ; Key Program of the Chinese Academy of Sciences[QYZDJ-SSW-DQC026] ; GIGCAS 135 project[135TP201601] ; China Postdoctoral Science Foundation[2017M622597] ; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences[SKLabIG-KF-18-05] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000609124800001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | 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) ; National Key R&D Program of China ; National Key R&D Program of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; GIGCAS 135 project ; GIGCAS 135 project ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences ; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, 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) ; National Key R&D Program of China ; National Key R&D Program of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; GIGCAS 135 project ; GIGCAS 135 project ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences ; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, 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) ; National Key R&D Program of China ; National Key R&D Program of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; GIGCAS 135 project ; GIGCAS 135 project ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences ; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, 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) ; National Key R&D Program of China ; National Key R&D Program of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; GIGCAS 135 project ; GIGCAS 135 project ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences ; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/100047]  |
| 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 | Wang, Qiang; Zhang, Hai-Xiang |
| 作者单位 | 1.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 3.Chengdu Univ Technol, Inst Sedimentary Geol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 10069, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ou, Quan,Wang, Qiang,Zeng, Ji-Peng,et al. Petrogenesis and tectonic implications of Middle Triassic basalts and rhyolites in the northern Qiangtang Block, central Tibet[J]. JOURNAL OF ASIAN EARTH SCIENCES,2021,206:16. |
| APA | Ou, Quan.,Wang, Qiang.,Zeng, Ji-Peng.,Yang, Jin-Hui.,Zhang, Hai-Xiang.,...&Chen, Yi-Wei.(2021).Petrogenesis and tectonic implications of Middle Triassic basalts and rhyolites in the northern Qiangtang Block, central Tibet.JOURNAL OF ASIAN EARTH SCIENCES,206,16. |
| MLA | Ou, Quan,et al."Petrogenesis and tectonic implications of Middle Triassic basalts and rhyolites in the northern Qiangtang Block, central Tibet".JOURNAL OF ASIAN EARTH SCIENCES 206(2021):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。