地震活动水平在潜在震源区判定中的应用——以甘肃酒西盆地为例  

The Application of Seismic Activities Level on Determination of Potential Seismic Source Zone in Jiuxi Basin,Gansu Province

作　　者：梁明剑[1] 袁道阳[2,3] 王爱国[2,3] 

机构地区：[1]四川省地震局工程地震研究院,四川成都610041 [2]中国地震局兰州地震研究所,甘肃兰州730000 [3]中国地震局地震预测研究所兰州科技创新基地,甘肃兰州730000

出　　处：《西北地震学报》2009年第2期136-141,共6页Northwestern Seismological Journal

基　　金：国家科技支撑计划项目子专题2006BAC13B01-0102;甘肃省科技攻关基金项目(2GS054-A44-015)

摘　　要：酒西盆地为河西走廊西段的一个压陷性盆地,其内发育了多条晚第四纪活动逆断裂、褶皱带,是未来具有发生破坏性地震的潜在震源区。通过对酒西盆地和邻近地区9个潜在震源区的长期地震活动水平的对比研究,发现不同震级档的潜在震源区基本处于各自的一个地震活动水平档上。据此将玉门潜在震源区地震活动水平与其它潜在震源区对比,并结合区内活动构造及历史地震等活动特征,判定其震级上限为MS7.0。指出地震活动水平对比方法可作为潜在震源区划分中的一个辅助手段。Jiuxi basin, a compressional basin in western segment of Hexi Corridor, had developed several late Quaternary reverse faults and fold zones, and is a potential seismic source of strong earthquake in future. In this paper, taking Yumen potential seismic source zone as an example, the long-term seismic activity levels of 9 potential seismic sources near Jiuxi basin are compared. It is found that seismic activities of seismic sources in same magnitude grades are nearly in the same level respectively. Basing on the result, it is feasible that determination of the upper-bound magnitude of Yumen potential source is Ms7. 0. So, comparing seismic activities level in long term is a auxiliary measure for determination of potential seismic source zone.

关 键 词：地震活动水平 酒西盆地 逆断裂-褶皱带 潜在震源区 震级上限 

分 类 号：P315.9[天文地球—地震学]