| 利用断层活动协调比方法分析云南现今地壳应变积累 |
| |
| 引用本文： | 徐东卓,塔拉,罗三明,朱文武,王世进,尹海权.利用断层活动协调比方法分析云南现今地壳应变积累[J].西北地震学报,2021,43(1):43-49. |
| |
| 作者姓名： | 徐东卓 塔拉 罗三明 朱文武 王世进 尹海权 |
| |
| 作者单位： | 中国地震局第一监测中心, 天津 300180 |
| |
| 基金项目： | 地震科技星火计划项目（XH20077Y）；科技部基础性工作项目（2015FY210400） |
| |
| 摘 要： | 断层活动协调比方法在分析云南地区的地壳应变积累上具有适用性。利用区域11处跨断层流动监测场地的三十余年观测资料,首先计算跨断层场地的三维活动量,进而得出场地的断层活动协调比参数,结果显示:(1)丽江、永胜、剑川、石屏、建水场地在对应6~7级地震上,历史映震效果良好;云南地区近期存在异常的跨断层监测场地有剑川、石屏和建水场地,存在应变积累、断层活动出现异常的断裂有剑川断裂和石屏-建水断裂;(2)结合跨断层原始观测数据和三维活动量时序曲线,综合认为云南地区地壳形变异常区域分布在滇西北地区的剑川、下关和永胜以及滇中地区的峨山、石屏和建水附近;(3)结合地震活动性资料,综合认为四川九寨沟7.0级地震后,南北地震带南段应力可能会加速积累,应重点关注云南地区的中强震危险性。
|
| 关 键 词： | 云南地区 跨断层监测 断层活动协调比 应变积累 |
| 收稿时间： | 2017/8/28 0:00:00 |
Analysis of Current Crustal Strain Accumulation in Yunnan with the Fault Motion Coordination Ratio Method |
| |
| XU Dongzhuo,TA L,LUO Sanming,ZHU Wenwu,WANG Shijin,YIN Haiquan.Analysis of Current Crustal Strain Accumulation in Yunnan with the Fault Motion Coordination Ratio Method[J].Northwestern Seismological Journal,2021,43(1):43-49. |
| |
| Authors: | XU Dongzhuo TA L LUO Sanming ZHU Wenwu WANG Shijin YIN Haiquan |
| |
| Institution: | The First Monitoring and Application Center, CEA, Tianjin 300180, China |
| |
| Abstract: | The fault motion coordination ratio method can be applied to analyze the crustal strain accumulation in Yunnan area. Based on the observation data of 11 cross-fault flow monitoring sites for more than 30 years, the three-dimensional activities on the sites were first calculated, and then the coordination ratio parameters of fault activity were obtained. The results showed that:(1) The sites of Lijiang, Yongsheng, Jianchuan, Shiping, and Jianshui have good reflecting effect to historical earthquakes with magnitude 6-7. There are anomalies in the sites of Jianchuan, Shiping, and Jianshui recently, and the strain accumulation and abnormal fault activities are show along the Jianchuan and Shiping-Jianshui faults; (2) Combined with the original cross-fault observation data and the three-dimensional activity time series curve, it is considered that the crustal deformation anomalies are distributed in Jianchuan, Xiaguan, and Yongsheng of northwestern Yunnan, and near Eshan, Shiping, and Jianshui of central Yunnan; (3) It is considered that after the Jiuzhaigou M7.0 earthquake in Sichuan Province, the stress accumulation in southern part of the North-South seismic belt may be accelerated, so more attention should be paid to the risk of moderate and strong earthquakes in Yunnan. |
| |
| Keywords: | Yunnan area cross-fault monitoring fault motion coordination ratio strain accumulation |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《西北地震学报》浏览原始摘要信息 |
| 点击此处可从《西北地震学报》下载免费的PDF全文 |
|
