佳伊断裂带晚白垩世走滑-逆冲事件的新证据  

New evidence of Late Cretaceous strike-slip thrust event in Jiamusi-Yitong fault zone

作　　者：万阔[1] 孙晓猛[1] 何松[1] 郑涵[1] 张旭庆[1] 李多姿 WAN Kuo SUN Xiao-meng HE Song ZHENG Han ZHANG Xu- qing LI Duo-zi(College of Earth Sciences, Jilin University, Changchun 130061, China)

机构地区：[1]吉林大学地球科学学院,长春130061

出　　处：《世界地质》2017年第2期486-494,506,共10页World Geology

基　　金：中国地质调查局项目(12120113098100);国家973项目火山岩油气藏形成机制和分布规律(2009CB219305)联合资助

摘　　要：在四平市叶赫镇发现一系列走滑-逆冲断层,断层面平直、陡倾,走向集中在NNE15°~35°范围内,组成了佳木斯—伊通两条主干边界断裂之间的分支断裂带,分支断裂呈雁列式排布,与走向NE45°的主干边界断裂呈锐角相交,指示边界断裂具有右旋走滑特征。叶赫镇走滑-逆冲断裂带的发现为佳木斯—伊通断裂存在晚白垩世晚期—末期的走滑-逆冲事件提供了新证据。叶赫镇分支断裂带是石岭镇分支断裂带向南部的延伸,两者切割了相同的地层,具有相同的构造特征和构造属性,属于同一走滑-逆冲断裂系统,它们是晚白垩世晚期—末期同一地球动力学背景下的产物。A series of strike-slip thrust faults were found in Yehe of Siping, exhibiting features of flat and steep-dipping fault planes with strikes ranging from NNE15°-35° and distributing in an echelon pattern. These faults form the branch faults between the two major boundary faults of Jiamusi-Yitong. The branch faults intersect the major faults with striking of NE 45° at an acute angle, indicating that the boundary faults have a dextral strip slip characteristic. The discovery of the strike-slip thrust fault zone in Yehe provides a new evidence for the strike-slip thrust event during late-end Late Cretaceous in the Jiamusi-Yitong fault. Yehe branch fault zone is the southern extension of the Shiling branch fault zone. Intersecting same strata, possessing identical structural characteristic and tectonic attribute and belonging to one strike-slip thrust system, the two fault zones are produced in the same geodynamic background in the late-end Late Cretaceous.

关 键 词：郯庐断裂 佳木斯—伊通断裂 晚白垩世 走滑-逆冲断裂带 

分 类 号：P542.3[天文地球—构造地质学]