Are low-velocity zones within the Tibetan crust the result of crustal melting from at least 28 Ma?
文献类型：期刊论文
| 作者 | Zhang, Xiu-Zheng; Wang, Qiang; Wyman, Derek; Kerr, Andrew C.; Gou, Guo-Ning; Dan, Wei ; Qi, Yue
|
| 刊名 | LITHOS
 |
| 出版日期 | 2023 |
| 卷号 | 440页码:107044 |
| 关键词 | PLATEAU CONSTRAINTS TEMPERATURE PALEOCENE EXTRUSION XENOLITHS GRANITE GENESIS UPLIFT |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2023.107044 |
| 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. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000967994700001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80401]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 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]. LITHOS,2023,440:107044. |
| 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,440,107044. |
| 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):107044. |
入库方式： OAI收割
来源：广州地球化学研究所
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。