1990年共和7.0级地震的发震构造讨论  

A DISCUSSION ON SEISMOGENIC FAULT FOR THE GONGHE M S7.0 EARTHQUAKE IN 1990

作　　者：陈玉华[1] 张敏[1] 张晓青[1] 朱德瑜[2] 肖振敏[2] 

机构地区：[1]青海省地震局 [2]中国地震局地壳应力研究所

出　　处：《西北地震学报》1998年第3期39-43,共5页Northwestern Seismological Journal

基　　金：青海省科委1995年10月下达的"青海共和盆地强震发生机制研究"项目

摘　　要：根据地质、地震及形变资料研究了１９９０年４月青海省共和ＭＳ７．０地震的发震构造．认为ＮＷＮＷＷ向的哇玉香卡拉干逆冲盲断裂是该次地震的发震构造．其地表形变以褶皱隆起为主．因此，共和地震是一次典型的“盲断裂褶皱地震”．Seismogenic structure of the Gonghe M S7.0 earthquake on Apr.26,1990 in Qinghai province is studied by using data on geology,seismology and deformation.It is possible that the Wayuxiangka Lagan blind thrust fault with trend of NW NWW is the seismogenic fault for the Gonghe M S7.0 earthquake in 1990.Ground deformation by the Gonghe earthquake is fold upheaval mainly.Therefore,the Gonghe earthquake is a typical “blind fault folding earthquake”.

关 键 词：发震断裂 盲断裂 褶皱 地震 发震构造 

分 类 号：P315.2[天文地球—地震学]