First evidence of eclogites overprinted by ultrahigh temperature metamorphism in Everest East, Himalaya: Implications for collisional tectonics on early Earth
文献类型：期刊论文
| 作者 | Wang, Jia-Min1; Lanari, Pierre2; Wu, Fu-Yuan1; Zhang, Jin-Jiang3; Khanal, Gautam Prashad1,4; Yang, Lei1,4 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2021-03-15 |
| 卷号 | 558页码:14 |
| 关键词 | modern-style plate tectonics continental collision Himalaya eclogite ultrahigh temperature crustal thickening |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2021.116760 |
| 英文摘要 | Modern-style plate tectonics, often characterised by subduction, is a fundamental dynamic process for planet Earth. Subduction related eclogites are widely used to indicate initiation of plate tectonics or whether different tectonic regimes dominated Earth history. However, such markers are commonly overprinted in ancient metamorphic terranes and rarely preserved even in most Phanerozoic mountain belts. This study tries to reveal the detailed burial and exhumation processes that formed granulitized eclogites in the Everest east region, central Himalaya, so as to explore the tectonic regimes recorded by similar rocks on early Earth. Robust Pressure-Temperature-time paths were achieved by studying the mineral relicts (Omp, Jd similar to 29%), high-temperature mineral textures (Sil-Crd-Qz-Spl-Mesoperthite assemblage, rutile exsolution in biotite), and multiple thermobarometry and petrochronology of eclogites and metapelites. Results show that these eclogites underwent eclogitization at conditions of 730-770 degrees C and similar to 20 kbar (similar to 11 degrees C/km) at similar to 30 Ma and were overprinted by a heating and decompression path to ultrahigh temperature (UHT) conditions of 6-11 kbar and 900-970 degrees C (similar to 40 degrees C/km) during 25-15 Ma. The resulting exhumation rate (2-3 mm/yr) is slow and prolonged (10-15 Myr) (U)HT favoured reequilibration of the eclogitic mineral assemblage and textures. The obtained UHT conditions, the first time ever reported for the Himalaya, were induced by combined effects of over-thickened (similar to 60 km) radioactive felsic crust and thinning of lithosphere to <90 km. This case study provides a critical example to understand the heat sources and timescale of UHT condition during continental collision. By comparing with the western Himalaya eclogites, we suggest that formation of cold vs. granulitized continental eclogites during the Himalayan orogeny is caused by different crustal thickness (normal similar to 30 km vs. over-thickened similar to 60 km) due to different collisional stages (infant vs. mature). In a wider perspective, ancient eclogites were commonly granulitized by stacking into the over-thickened orogenic crust during mature continental collision. According to similar granulitized eclogites preserved on early Earth, Himalaya-type continental subduction/collision should have become a global pattern during the Paleoproterozoic (2.0-1.8 Ga). (C) 2021 Elsevier B.V. All rights reserved. |
| WOS关键词 | HIGH-PRESSURE ; PLATE-TECTONICS ; SUBDUCTION ZONE ; KOLA-PENINSULA ; AMA DRIME ; EVOLUTION ; EOCENE ; CRUST ; EXHUMATION ; GRANULITE |
| 资助项目 | National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41972065] ; Second Tibetan Plateau Scientific Expedition and Research program[2019QZKK0703] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000615325500002 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program ; Second Tibetan Plateau Scientific Expedition and Research program |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/100137]  |
| 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, Jia-Min |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Bern, Inst Geol Sci, CH-3012 Bern, Switzerland 3.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jia-Min,Lanari, Pierre,Wu, Fu-Yuan,et al. First evidence of eclogites overprinted by ultrahigh temperature metamorphism in Everest East, Himalaya: Implications for collisional tectonics on early Earth[J]. EARTH AND PLANETARY SCIENCE LETTERS,2021,558:14. |
| APA | Wang, Jia-Min,Lanari, Pierre,Wu, Fu-Yuan,Zhang, Jin-Jiang,Khanal, Gautam Prashad,&Yang, Lei.(2021).First evidence of eclogites overprinted by ultrahigh temperature metamorphism in Everest East, Himalaya: Implications for collisional tectonics on early Earth.EARTH AND PLANETARY SCIENCE LETTERS,558,14. |
| MLA | Wang, Jia-Min,et al."First evidence of eclogites overprinted by ultrahigh temperature metamorphism in Everest East, Himalaya: Implications for collisional tectonics on early Earth".EARTH AND PLANETARY SCIENCE LETTERS 558(2021):14. |
入库方式： OAI收割
来源：地质与地球物理研究所
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