郯庐断裂带江苏段第四纪活动特征及其动力学背景探讨  

A Discuss of the Characteristics of Activities in Quaternary for the Jiangsu Segment of Tan-Lu Fault Zone and Its Geodynamic Setting

作　　者：张鹏[1] 李丽梅[1] 张景发[2] 姜文亮[2] 陈丁[2] 李金良[1] 谭慧明[1] 

机构地区：[1]江苏省地震工程研究院,南京210014 [2]中国地震局地壳应力研究所,北京100085

出　　处：《防灾减灾工程学报》2011年第4期389-396,共8页Journal of Disaster Prevention and Mitigation Engineering

基　　金：江苏省徐州市政府项目<徐州市新城区;开发区活断层探测与地震危险性评价>(2009)资助

摘　　要：本文通过对郯庐断裂带江苏段开展的野外调查、深部构造和运动学特征等方面的研究,结合近年来最新的研究成果,对郯庐断裂带江苏段的第四纪活动特征及其动力学背景进行了探讨。郯庐断裂带江苏段第四纪活动具有东强西弱、北强南弱的特征;郯庐断裂带第四纪的逆冲活动主要受西太平洋弧后扩张的动力学因素控制;南华北与北华北地块深部构造特征和新构造运动的差异性,是导致郯庐断裂带各段活动性差异的重要原因。Based on the field investigation of the Jiangsu segment of Tan-lu fault zone,integrated with the deep structures,kinematic characteristics and new research results in recent years,we discuss the characteristics of activities in quaternary for the Jiangsu segment of Tan-Lu fault zone.The activities of the Jiangsu segment are increased from south to north and from west to east.The thrusting movement with dextrorotation of Tan-Lu fault zone in quarernary was controlled by the back-arc spreading due to the subduction of west Pacific plate.The charateristics in deep structures between Southern North China block and northern North China block and the distinction of neotectonics are the significent reason for the diffe-rent characteristics of activities of each segment of Tan-Lu fault zone.

关 键 词：郯庐断裂带 江苏段 第四纪活动性 动力学背景 野外调查 

分 类 号：P315.2[天文地球—地震学]