Early Cretaceous bimodal magmatism in the eastern Tethyan Himalayas, Tibet: Indicative of records on precursory continental rifting and initial breakup of eastern Gondwana
文献类型：期刊论文
| 作者 | Tian, Yihong1; Gong, Junfeng1; Chen, Hanlin1; Guo, Lishuang2; Xu, Qinqin3; Chen, Lin4; Lin, Xiubin1; Cheng, Xiaogan1; Yang, Rong1; Zhao, Lei3 |
| 刊名 | LITHOS
 |
| 出版日期 | 2019 |
| 卷号 | 324页码:699-715 |
| ISSN号 | 0024-4937 |
| 关键词 | Bimodal magmatism Tethyan Himalayas Zircon U-Pb geochronology Hf isotope Gondwana breakup |
| DOI | 10.1016/j.lithos.2018.12.001 |
| 英文摘要 | In this study, we report a bimodal magmatic suite of gabbroic-granitic rocks in the Cuona area of the eastern Tethyan Himalayas, which is related to the rifting event between Greater India and western Australia in eastern Gondwana. Whole-rock major and trace elements, SHRIMP zircon U-Pb geochronology and Hf isotopic analysis were conducted to reveal the petrogenesis of the bimodal suite and through this to explore the tectonic implications. Our main findings include the following. First, the gabbros and granites were emplaced synchronously at 140-137 Ma, considering the field relationships they comprise a bimodal suite. Second, the gabbros are enriched in light rare-earth-elements (LREE), depleted in heavy rare-earth-elements (HREE) with slight Eu anomalies, and have sHf(t) values of +0.04 - +8.30, which as a whole, suggests that they were derived from an ocean island basalt (OIB)-like mantle source. Third, the granites display low MgO, CaO, and Al2O3, marked enrichment in LREE, highly refracted HREE with strongly negative Eu anomalies and epsilon Hf(t) values of -2.01 to +1.71, all of which ultimately gives the characteristics of A1-type granites. Based on these observations, we propose that the bimodal suite is formed in a continental rift. Specifically, the gabbros originated from the mantle plume, whereas the granites derived from the upper crust with garnet-bearing metapelite. This rifting event initiated at 140 Ma, which places bounds on the initial breakup of eastern Gondwana, specifically the separation of Greater India from western Australia. (C) 2018 Elsevier B.V. All rights reserved. |
| WOS关键词 | LARGE IGNEOUS PROVINCE ; PB ZIRCON GEOCHRONOLOGY ; A-TYPE GRANITOIDS ; GEOCHEMICAL CHARACTERISTICS ; FRACTIONAL CRYSTALLIZATION ; VOLCANIC-ROCKS ; SOUTH CHINA ; SEDIMENTARY HISTORY ; KERGUELEN PLUME ; NORTHWEST CHINA |
| 资助项目 | National Natural Science Foundation of China[41472182] ; National Natural Science Foundation of China[41472181] ; National Natural Science Foundation of China[41602210] ; National S&T Major Project od China[2017ZX05008-001] ; National S&T Major Project od China[2017ZX05003-001] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000457819800045 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National S&T Major Project od China ; National S&T Major Project od China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National S&T Major Project od China ; National S&T Major Project od China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National S&T Major Project od China ; National S&T Major Project od China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National S&T Major Project od China ; National S&T Major Project od China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/90533]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Gong, Junfeng |
| 作者单位 | 1.Zhejiang Univ, Sch Earth Sci, Hangzhou 310027, Zhejiang, Peoples R China 2.CEA, Inst Crustal Dynam, Key Lab Crustal Dynam, Beijing 100085, Peoples R China 3.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tian, Yihong,Gong, Junfeng,Chen, Hanlin,et al. Early Cretaceous bimodal magmatism in the eastern Tethyan Himalayas, Tibet: Indicative of records on precursory continental rifting and initial breakup of eastern Gondwana[J]. LITHOS,2019,324:699-715. |
| APA | Tian, Yihong.,Gong, Junfeng.,Chen, Hanlin.,Guo, Lishuang.,Xu, Qinqin.,...&Yang, Shufeng.(2019).Early Cretaceous bimodal magmatism in the eastern Tethyan Himalayas, Tibet: Indicative of records on precursory continental rifting and initial breakup of eastern Gondwana.LITHOS,324,699-715. |
| MLA | Tian, Yihong,et al."Early Cretaceous bimodal magmatism in the eastern Tethyan Himalayas, Tibet: Indicative of records on precursory continental rifting and initial breakup of eastern Gondwana".LITHOS 324(2019):699-715. |
入库方式： OAI收割
来源：地质与地球物理研究所
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