从天津地区近十年的地下水位变化初探本区断裂活动的新动向
|
摘要
在现有地震流体研究成果基础上，借地下水位的时空异常图象进行推测区域构造断裂活动的探索。通过对天津地区１９８５至１９９４年地下水位异常的分析对本区构造活动给出了以下推测：①１９８９年大同６．１级地震对地区构造活动显示出突出的调整性的变化。②沧东断裂带是本地区最活跃居主导活动地位的断裂。③沧东断裂带应力集中部位有由天津西南段向东北转移的迹象。
Based on the achievements in seismological fluid research,we analysed the time and space patterns of groundwater level anomalies in the period of 1985-1994 in Tianjin area,the main results are as follows:(1) The 1989 Datong earthquake with Ms6.1 shows a adjusting change of regional tectonic activitIes ;(2) The Cangdong fractured zone is still a main active fractured zone in Tianjin area ;(3) It is found that the stress concentration position in Cangdong fractured Zone showed a kind of transfered trace from the southwestern section to the northeastern section.
Based on the achievements in seismological fluid research,we analysed the time and space patterns of groundwater level anomalies in the period of 1985-1994 in Tianjin area,the main results are as follows:(1) The 1989 Datong earthquake with Ms6.1 shows a adjusting change of regional tectonic activitIes ;(2) The Cangdong fractured zone is still a main active fractured zone in Tianjin area ;(3) It is found that the stress concentration position in Cangdong fractured Zone showed a kind of transfered trace from the southwestern section to the northeastern section.
引文
1张永仙，等．孕育过程中孔隙压及地下水位变化的数值模拟．地震，1994，（1）．2张伯崇，等．应力对岩石中孔隙流体压力的影响和地下水位震前变化机理．地震学报，1991，13（2）．3国家地震局《1976年唐山地震》编辑组．1976年唐山地震．北京：地震出版社，1982．4蒋成思，等．现今断裂活动与强地震．地壳形变与地震，1988，8（2）．5周硕愚，等．前兆观测系统的动态灰箱分析法．地壳形变与地震，1984，4（4）．6冯绚敏，等．地下水流体运场地震效应讨论．地震，1995，（1）．
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心