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Title:: Research on Quaternary Activity in Jiangsu Sector of the Tan-Lu Fault Zone

作者:: 龚伟¹; 曾佐勋¹; 2; 3; 王杰¹; 徐大良¹; 胡烨¹; 李细光⁴; (1.中国地质大学地球科学学院,武汉 430074; 2.教育部长江三峡库区地质灾害研究中心,武汉 430074; 3.华中构造力学研究中心,武汉 430074; 4.广西壮族自治区地震局,南宁 530022))

Author(s):: GONG Wei¹; ZENG Zuo-xun¹; 2; 3; WANG Jie¹; XU Da-liang¹; HU Ye¹; LI Xi-guang⁴; (1.Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, Hubei, China)(2.Three Gorges Research Center for geo-harzard, Ministry of Education, Wuhan 430074, Hubei, China)(3. Huazhong Tectonomechanical Research Center, Wuhan 430074, Hube

Keywords:: Jiangsu sector of the Tan-Lu fault zone; quaternary activity; remote sensing image; sinistral strike-slipping adjustability

摘要:: 从前人地表地质、地球化学探测与构造年代学,形变资料等方面入手,结合遥感影像信息,对郯庐断裂带江苏段第四纪活动性进行了系统分析; 在总结前人研究成果基础上,对其活动性差异的成因进行了探讨。结果表明:郯庐断裂带江苏段在第四纪新构造运动时期总体活动性不强,表现为右旋走滑性质。断裂以宿迁为界具有明显的分段活动差异性——北段较强,南段较弱; 在北华北块体内部,郯庐断裂带通过其活动性的分段差异调节次一级块体的不同方向位移; 枣庄—宿迁断裂对郯庐断裂带的切割及其左旋走滑调节作用是郯庐断裂带江苏段活动差异性的主要成因。

Abstract:: Based on former geological section data,geochemical detection,structure chronological analysis data and crust deformation data,together with remote sensing imagery interpretation,we systematically analyze the quaternary activity in Jiangsu sector of the Tan-Lu fault zone.Furthermore,based on the former research results,the generation mechanisms of its segmentation is discussed.The results show that the movement of Jiangsu sector of Tan-Lu fault zone is not intense during geotectonic era.It is featured by dextral strike-slipping and is divided into two main segments by different active intensity.The intensity in north part is stronger than the one inthe south part.In the north of North China plate,the different movement intension between them accommodated displacement motion of blocks.The Zaozhuang-Suqian fault's division and sinistral strike-slipping adjustability is the main mechanism of Jiangsu sector of Tan-Lu fault zone.