摘要
通过对研究区的构造地貌调查、地质剖面研究等,对大具断裂的活动性进行分析论述。此段断裂走向大约为310°,长度约为20 km;断层性质主要以右旋走滑为主,伴有逆冲的分量,逆冲分量主要表现为南盘上升而北盘下降。断层的横截面表现为一系列的正花状构造。根据光释光测年数据综合分析认为大具断裂北段的最新活动在距今97. 57±12. 30 ka～63. 94±8. 69 ka之间,据此可以计算断层的垂向滑移速率约为4. 8 mm·ka^(-1)。
This paper analyzes and discusses the activity of Daju Fault through the investigation of the tectonic landform and the study of geological profiles in the study area. The fault strike is about 310 ° and the length is about 20 km. The fault is dominated by dextral strike-slip with thrust component. The thrust component is mainly manifested by the rise of the southern disk and the decrease of the north disk. According to the comprehensive analysis of chronological data, the latest activity of the northern segment of the Daju fault lies between 97.57±12.30 ka and 63.94±8.69 ka, from which the fault can be calculated the vertical slip rate is about 4.8 mm·ka^-1 .
作者
王佳龙
谢富仁
杨斌
雷惊昊
WANG Jia-long;XIE Fu-ren;YANG BIN;LEI Jing-hao(First monitoring center of China Earthquake Administration, Tianjin 300180,China;Institute of Crustal Dynamics of China Earthquake Administration, Beijing 100085,China;Institute of Geology of China Earthquake Administration, Beijing 100029,China;Shandong Earthquake Agency,Jinan 250014,Shandong,China;Peking University, Beijing 100871,China)
出处
《内陆地震》
2018年第4期309-318,共10页
Inland Earthquake
基金
中国地震局监测预报司"全球典型火山事件跟踪上报"项目(17A44ZX288)
