库赛湖—玛曲断裂带东、西大滩段全新世活动特征及古地震的研究  

PRELIMINARY STUDY ON PALEOEARTHQUAKES AND THE CHARACTERISTICS ALONG THE SECTIONS OF DONGDATAN AND XIDATAN ON KUSAI LAKE-MAQU FAULT ZONE DURING HOLOCENE PERIOD

作　　者：王多杰[1] 徐小卫[1] 贾运鸿 孙贵珍 

机构地区：[1]国家地震局兰州地震研究所

出　　处：《内陆地震》1992年第2期158-166,共9页Inland Earthquake

摘　　要：通过对野外调查资料的分析认为:库赛湖—玛曲断裂带东、西大滩段全新世以来具有多次强烈活动,表现为断错晚第四纪地层,断错山脊、水系、河流阶地以及冰水扇等一系列地貌现象。根据对断裂带上古地震破裂带的研究,全新世以来在该段曾发生过三次7.5级左右的古地震事件。Kusai lake -Maqu fault,the major active fault zone in Qinghai-Tibet Plateau is found out of strong seismicities in Holocene through geological and geomorphological investigation , especially on its section of Dongdatan and Xidatan ,in forms of offsetting Late Quaternary stratum , ridge , water system , river terrace , outwash fan and so on . According to the surface rupture zone of paleoearthquakes along the fault ,it is estimated that there at least occurred three large paleoearthquake events (M≥7. 5) since Holocene.

关 键 词：库赛湖 玛曲 地震 断裂带 古地震 

分 类 号：P315.2[天文地球—地震学]