Climate Change Data Portal
| DOI | 10.1016/j.tecto.2024.230239 |
| Cenozoic tectonic transition within the western segment of the Longmenshan fault, southeast margin of the Tibetan Plateau: Insights from geological and geophysical data | |
| 发表日期 | 2024 |
| ISSN | 0040-1951 |
| EISSN | 1879-3266 |
| 起始页码 | 875 |
| 卷号 | 875 |
| 英文摘要 | Thrust fault zones around the Tibetan Plateau (TP) record the tectonic evolution between the Plateau and its surrounding terranes, which is helpful for understanding the uplift mechanism and deformational processes of the TP. The Longmenshan fault (LMSF) is the tectonic boundary (TB) between the Yangtze terrane (YT) and Songpan-Garze terrane (SGT), while the TB of its western segment, either the Lijiang-Xiaojinhe fault (LXF) or Jinhe-Qinghe fault (JQF), is controversial. Therefore, we conducted magnetotelluric (MT) imaging, surface structure surveys, and petrologic analysis to further determine the deep-shallow structural relationship of the western LMSF segment. Resistors R1 and R2 revealed by MT imaging may have originated from different magmatism. Among them, R2 may have originated from plume underplating, which is consistent with previous studies, while R1 may have originated from the residue of episodic mafic magma intrusion along the JQF over a broader period. Based on regional geophysics, surface structural patterns and petrologic mineralogy, it is suggested that the JQF may have deformed deep into the lower crust or upper mantle, accommodating the southeast expansion of the TP by thrusting and acting as the TB between the YT and SGT before -15 Ma. After -15 Ma, due to the activation of the large-scale strike-slip faults, the LXF gradually replaced the JQF to dominate the structural deformation of the western LMSF segment. Our results indicate that the above tectonic transition might be associated with the geodynamic process from centralized deformation to diffuse deformation within the southeast TP during the late Cenozoic. |
| 英文关键词 | Southeast Tibetan Plateau; Western segment of Longmenshan fault; Lijiang-Xiaojinhe fault and Jinhe-Qinghe fault; Magnetotelluric; Tectonic transition |
| 语种 | 英语 |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| WOS记录号 | WOS:001196824400001 |
| 来源期刊 | TECTONOPHYSICS
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/303546 |
| 作者单位 | China Geological Survey; Chengdu Center, China Geological Survey; Southwest Jiaotong University; Chengdu University of Technology |
| 推荐引用方式 GB/T 7714 | . Cenozoic tectonic transition within the western segment of the Longmenshan fault, southeast margin of the Tibetan Plateau: Insights from geological and geophysical data[J],2024,875. |
| APA | (2024).Cenozoic tectonic transition within the western segment of the Longmenshan fault, southeast margin of the Tibetan Plateau: Insights from geological and geophysical data.TECTONOPHYSICS,875. |
| MLA | "Cenozoic tectonic transition within the western segment of the Longmenshan fault, southeast margin of the Tibetan Plateau: Insights from geological and geophysical data".TECTONOPHYSICS 875(2024). |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
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。
