【摘要】 舒兰—伊通断裂带是吉林省东部的一条大型右旋走滑断裂带,近NE向延伸100多公里,它构成了伊通盆地和舒兰盆地的重要地质边界.通过野外构造地貌考察,对舒兰—伊通断裂的分段性及其地震活动性进行了初步研究.估算出舒兰—伊通断裂北段(舒兰段)晚更新世的垂直滑动速率为0.89～1.3 mm/a,其他段为早—中更新世活动断裂.依据地质构造背景,应用测震学的基本方法,讨论舒兰一伊通断裂带的地震活动特征,由地震活动在时空强显示的一些规律性,认为近期该区域中强地震活动可能处于较弱势状态.更多还原

【Abstract】 In the easter Jilin province,the Shulan-Yitong fault zone over 100km-long is a large-scale right-lateral strike-slip fault,which constituts the border between the Shulan and the Yitong basin.The goal of this study is to document the segmentation of the fault and earthquake features along the Shulan-Yitong fault in the eastern Jilin province based on the Late Quaternary geomorphic features from field observations.The average vertical slip rates in the Shulan basin segment in the north is 0.89～1.3 mm/a in late Pleistocene.The other segment of the Shulan-Yitong fault zone is an active reverse fault in earlt-middle Pleistocene epoch.According to the background of geological tectonics,we discuss the features of seismicity in the Slan—Yitong fracture zone.Based on the temporal,spatial and intensity laws of earthquakes,it is considered that the moderate or major earthquakes are situated in a weak state in the near future.更多还原