阿尔金断裂东段断层泥特征及断层滑动方式  

THE CHARACTERISTICS OF FAULT GOUGES AND THE MODE OF FAULT SLIP IN EASTERN SEGMENT OF ALTUN FAULT ZONE

作　　者：吕德徽 向光中[1] 

机构地区：[1]国家地震局兰州地震研究所

出　　处：《西北地震学报》1993年第2期13-23,共11页Northwestern Seismological Journal

基　　金：地震科学联合基金

摘　　要：本文用扫描电镜、X衍射等方法对阿尔金断裂东段断层泥的特征、断层活动强度及断层滑动方式进行了研究,获得了如下结论: (1)阿尔金断裂东段的活动强度自晚更新世以后,由西往东逐渐减弱。(2)该断裂东段在第四纪以来至少发生过2—3次古地震事件。(3)全新世以来,该断裂的肃北至阿克塞一段以粘滑为主,而东边的巴个峡至昌马大坝之间断裂的滑动方式则为蠕滑。In this paper, we have studied the features of fault gouges, the fault activity and the mode of fault slip in the eastern segment of Altun Fault Zone by means of the scanning electron microscope and X ray etc.. The results are as follow.. 1) The activity has been decreasing from east to West in eastern segment of Altun Fault Zone since Late Pleistocene Epoch. 2) There were at least. 2—3 palaeoearthquakes during Quaternary Period. 3 )The fault has been mainly in stick slip from Subei to Arkesai, and in creep slip from Bage Valley to Changma Dam since Holocene Epoch.

关 键 词：断层泥 断层活动 强度 古地震 

分 类 号：P315.5[天文地球—地震学]