Climate Change Data Portal
| DOI | 10.6038/cjg2023Q0697 |
| Relationship between the lithosphere effective elastic thickness and earthquake distribution in the northeastern margin of the Tibetan Plateau | |
| 发表日期 | 2024 |
| ISSN | 0001-5733 |
| 起始页码 | 67 |
| 结束页码 | 2 |
| 卷号 | 67期号:2 |
| 英文摘要 | The lithosphere effective elastic thickness (T-e) represents the comprehensive mechanical strength of the lithosphere, which is of great significance for understanding the seismogenic environment of regional deep structure. The geological structure of the northeast margin of the Tibetan Plateau is complex and strong earthquake activity occurs frequently. We aim to further understand the mechanical properties of the deep lithosphere in the region and its relationship with seismic activity. This article uses the Fan wavelet spectral method to calculate the effective elastic thickness ( T-e) and load ratio (F) of the lithosphere on the northeastern edge of the Tibetan Plateau through joint inversion of admittance and correlation. WGM2012 gravity anomaly, ETOPO1 topography, and CRUST1. 0 model are used. The results show that T, in the whole study area is obviously high in the east and low in the west. T, in the Qinghai-Tibet block changes dramatically. The high value (>40 km) in the west and the low value (<20 km) in the east coexist. T-e in the Ordos block is relatively high (>30 km) and changes smoothly. The load ratio F is locally high in the southwest. The load ratio F of the Bayan Har and the Qiangtang blocks are relatively high (>0. 5), indicating that the underground load is the main load. While other blocks are relatively low (<0. 2), indicating that the surface load is the main load. The Ordos block has stable structure, strong lithosphere and high T-e value; the internal tectonic activity is weak, the lateral change of deep material density is small, the load on the lithosphere is mainly from surface, so the load ratio F is small. The east of Qaidam block and the east of Bayan Har block may have lower crustal flow, with weak lithosphere and low T-e values. The load ratio F in the interior of the Bayan Har block and the Xianshuihe fault is high, and the load on the lithosphere is mainly from underground, which may be caused by the large lateral changes in the deep lithosphere because of the eastward flow of crustal materials. By comparing and analyzing the corresponding relationship between T-e and T-e gradient, F and F gradient and the earthquake in the study area, it is found that the earthquake generally occurs in the area with relatively low T-e, large T-e gradient and large F gradient. The earthquakes with small magnitude mostly occur in the area with relatively small F, and the strong earthquakes with magnitude above 6 mostly occur in the area with F about 0. 1 and 0. 8. Therefore, the area where the lithosphere effective elastic thickness T-e is thin, T-e gradient and F gradient are large is more prone to earthquakes. |
| 语种 | 英语 |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| WOS记录号 | WOS:001184348600009 |
| 来源期刊 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/306460 |
| 作者单位 | Chang'an University; Chang'an University |
| 推荐引用方式 GB/T 7714 | . Relationship between the lithosphere effective elastic thickness and earthquake distribution in the northeastern margin of the Tibetan Plateau[J],2024,67(2). |
| APA | (2024).Relationship between the lithosphere effective elastic thickness and earthquake distribution in the northeastern margin of the Tibetan Plateau.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,67(2). |
| MLA | "Relationship between the lithosphere effective elastic thickness and earthquake distribution in the northeastern margin of the Tibetan Plateau".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 67.2(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。
