色尔腾山山前断裂晚第四纪活动与破裂分段模型  

Late Quarternary Activity and Segmentation Model of the Sertengshan Piedmont Fault

作　　者：陈立春[1] 冉勇康[1] 杨晓平[1] 

机构地区：[1]中国地震局地质研究所,北京100029

出　　处：《中国地震》2003年第3期255-265,共11页Earthquake Research in China

基　　金：国家重点基础发展规划项目 (G19980 4 0 7)

摘　　要：通过对断裂的几何结构、晚第四纪活动构造特征、古地震活动性以及分段边界构造特征等方面的分析和研究 ,色尔腾山山前断裂的活动段落组成可以初步确定为 :乌加河段 (东乌盖沟 -大后店 )、乌句蒙口 -东风村段 (大后店 -得令山 )、大佘太段 (得令山 -小佘太沟口 )和乌兰忽洞段 (小佘太沟口 -台梁 )等 4段 ,其间的段落边界分别为大后店山咀、得令山山咀和小佘太沟口阶区。这些段落为相互独立的地震活动单元 ,但不能排除乌加河段和乌句蒙口 -东风村段之间、大佘太段和乌兰忽洞段之间联合破裂的可能。On the basis of investigation and analysis of geometrical construction, active tectonic characteristics in the late Quarternary, paleoseismic activity and segmentation boundary along the Sertengshan piedmont fault, the 4 segments is found to be fit for segmentation of this fault as follows: the Wujiahe segment (from Dongwugai channel to Dahoudian), the Wujumengkou-Dongfeng village segment (from Dahoudian to Deling mountain), the Dashetai segment (from Deling mountainto to Xiaoshetai channel-mouth), and the Wulanhudong segment (from Xiaoshetai channel-mouth to Tailiang). And their boundaries are the Dahoudian mountain salient, the Deling mountain salient and the step at Xiaoshetai channel-mouth, respectively. Of course, those segments are independent for faulting. However, it is possible that both the Wujiahe segment and the Wujumengkou-Dongfeng village segment or both the Dashetai segment and the Wulanhudong segment may be ruptured together because of a few very strong earthquakes.

关 键 词：色尔腾山山前断裂 活动段落 活动断裂 古地震 

分 类 号：P315[天文地球—地震学]