晋冀蒙交界区重力场动态变化及潜在危险区分析  

Analysis on Dynamic Variation of Gravity Field and Earthquake Prone Region in the Shanxi-Hebei-Mongolia Border Area

作　　者：贾宇鹏[1] 郝鹏飞[1] 檀玉娟[1] 李洋洋[1] 李勇江[1] 刘冬阳 JIA Yupeng;HAO Pengfei;TAN Yujuan;LI Yangyang;LI Yongjiang;LIU Dongyang(Geophysical Exploration Center,China Earthquake Administration,Zhengzhou 450002,Henan,China)

机构地区：[1]中国地震局地球物理勘探中心

出　　处：《地震研究》2019年第3期398-404,共7页Journal of Seismological Research

基　　金：中国地震局震情跟踪定向工作任务(2018010234);地震监测运维(流动重力)和川滇国家地震监测预报实验场项目(2016CESE0103)联合资助

摘　　要：对2013—2017年晋冀蒙交界区的流动重力观测资料重新进行整体平差计算,对比分析了该区域不同尺度的重力场变化特征,再结合重力场变化和深部构造特征探讨了潜在危险区。结果表明:测区出现了区域性重力异常,形成了与构造断裂较为一致的重力梯度带,这可能预示着存在构造运动或应力增强作用,同时应注意大同—张家口和石家庄—邢台一带的地震危险性。Using the observation data of mobile gravity measurements in Shanxi-Hebei-Mongolia boreder area from 2013 to 2017,we recalculated all the data based on the adjust method. Then,we analyzed the spatial-temporal variation of the regional gravity field at different time periods. Finally,we discussed the earthquake prone regions based on gravity changes and deep tectonics. The result mainly shows that,the regional gravity anomaly appeared in the whole study region,forming gravity gradient zones consistent with tectonic faults,which may indicate tectonic movement or stress enhancement. We should pay attention to the potential earthquake risk in Datong-Zhangjiakou and Shijiazhuang-Xingtai area.

关 键 词：晋冀蒙 重力场 地壳速度模型 地震危险区 

分 类 号：P315.726[天文地球—地震学]