Repeating microearthquakes and deep deformation along the major faults in the Sichuan-Yunnan region, China
文献类型：期刊论文
| 作者 | Li Le5; Chen QiFu3,4; Niu FengLin1,2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2021-12-01 |
| 卷号 | 64期号:12页码:4308-4326 |
| 关键词 | Sichuan-Yunnan region Repeating microearthquakes Recurrence intervals Deep slip rates Asperities |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg202100516 |
| 英文摘要 | Repeating microearthquakes (M<4) are recurrent ruptures at small fault patches, which provide in-situ information for studying the spatial variation and temporal evolution of subsurface deformation at seismogenic depth. In this study, we compiled a total of 76 repeating earthquake sequences occurring at major faults in the Sichuan-Yunnan region in southwest China. We then employed these sequences to estimate fault slip rates based on their sizes and recurrence intervals. The slip rates estimated at various parts of the study area are 4.3 similar to 5.4 mm . a(-1) at similar to 23 km deep along the Lijiang and Ninglang faults, 1.6 similar to 10.1 mm . a(-1) in the depth range of 3.0 similar to 12.3 km along the Xiaojiang fault, 2.3 similar to 10.0 mm . a(-1) at depths between 6.0 and 13.4 km along the northern segment of Honghe fault, 3.0 similar to 10.2 mm . a in the depth range of 3.0 similar to 18.7 km along the southern segment of Xianshuihe fault, 3.5 similar to 9.6 mm . a(-1) at depths between 4.0 and 17.3 km along the Longmenshan fault, and 5.8 similar to 10.2 mm . a(-1) in the depth range of 3.6 similar to 18.7 km at the southernmost Longmenshan fault. The observed slip rates among different faults are roughly in the similar range, which may reflect the characteristic of deformation within the Sichuan-Yunnan block and the Bayan Har block. Our results also showed that most of the repeating sequences tend to occur at the edge of asperities of strong earthquakes, suggesting a close spatial correlation between repeating microearthquakes and impending large devastating earthquakes. The slip rates estimated from deep sequences appears to systematically larger than those derived from shallow events. More importantly, there is a sudden acceleration in deep slip rate before strong earthquakes, which may suggest that the asperity is entering its meta-instable state. |
| WOS关键词 | SPATIOTEMPORAL VARIATIONS ; EARTHQUAKE SEQUENCE ; WENCHUAN EARTHQUAKE ; EASTERN BOUNDARY ; SEISMIC EVENTS ; SLIP RATES ; ZONE ; RECURRENCE ; EVOLUTION ; INSTABILITY |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000751863800007 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/104924]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Li Le |
| 作者单位 | 1.Rice Univ, Dept Earth Environm & Planetary Sci, Houston, TX 77005 USA 2.China Univ Petr, State Key Lab Petr Resources & Prospecting, Unconvent Petr Res Inst, Beijing 102249, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 5.China Earthquake Adm, Inst Earthquake Forecasting, Beijing 100036, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li Le,Chen QiFu,Niu FengLin. Repeating microearthquakes and deep deformation along the major faults in the Sichuan-Yunnan region, China[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2021,64(12):4308-4326. |
| APA | Li Le,Chen QiFu,&Niu FengLin.(2021).Repeating microearthquakes and deep deformation along the major faults in the Sichuan-Yunnan region, China.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,64(12),4308-4326. |
| MLA | Li Le,et al."Repeating microearthquakes and deep deformation along the major faults in the Sichuan-Yunnan region, China".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 64.12(2021):4308-4326. |
入库方式： OAI收割
来源：地质与地球物理研究所
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。