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| DOI | 10.1016/j.lithos.2023.107044 |
| Are low-velocity zones within the Tibetan crust the result of crustal melting from at least 28 Ma? | |
| Zhang, Xiu-Zheng; Wang, Qiang; Wyman, Derek; Kerr, Andrew C.; Gou, Guo-Ning; Dan, Wei; Qi, Yue | |
| 发表日期 | 2023 |
| ISSN | 0024-4937 |
| EISSN | 1872-6143 |
| 卷号 | 440 |
| 英文摘要 | Geophysically identified low-velocity zones (LVZs) are widespread within the Tibetan lower-middle crust, but their nature and role in models of the development of the Tibetan Plateau remain controversial. The debate stems mainly from whether the Tibetan crust was hydrous and has therefore undergone substantial melting. Here, we identify hydrous crustal xenoliths incorporated into 28 Ma syenite porphyries from central-northern Tibet. These xenoliths indicate the former existence of a cold (T = 680-790 degrees C) and water-rich (1.10-1.50 wt%) crustal endmember at a depth of 14-40 km in the Tibetan lower-middle crust. Our new petrological evidence indicates the LVZs are partially molten layers that have existed within the Tibetan crust since at least 28 Ma. High- to ultrahigh-temperature metamorphism since the Miocene is inferred to have triggered widespread melting of the former hydrous crust, which would have promoted the development of LVZs and resulted in a flat Tibet. |
| 关键词 | Crustal xenolithsLow-velocity zonesLower-middle crustCrustal meltingTibetan Plateau |
| 英文关键词 | PLATEAU; CONSTRAINTS; TEMPERATURE; PALEOCENE; EXTRUSION; XENOLITHS; GRANITE; GENESIS; UPLIFT |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| WOS记录号 | WOS:000967994700001 |
| 来源期刊 | LITHOS
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/283583 |
| 作者单位 | Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; University of Sydney; Cardiff University |
| 推荐引用方式 GB/T 7714 | Zhang, Xiu-Zheng,Wang, Qiang,Wyman, Derek,et al. Are low-velocity zones within the Tibetan crust the result of crustal melting from at least 28 Ma?[J],2023,440. |
| APA | Zhang, Xiu-Zheng.,Wang, Qiang.,Wyman, Derek.,Kerr, Andrew C..,Gou, Guo-Ning.,...&Qi, Yue.(2023).Are low-velocity zones within the Tibetan crust the result of crustal melting from at least 28 Ma?.LITHOS,440. |
| MLA | Zhang, Xiu-Zheng,et al."Are low-velocity zones within the Tibetan crust the result of crustal melting from at least 28 Ma?".LITHOS 440(2023). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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