摘要
在区域地质构造调查、地球物理资料和遥感解译基础上,采用钻探、槽探、^(14)C年代学测试等方法,对伊通-舒兰断裂带四平段NE向隐伏断层的时代、性质及构造意义进行探讨。结果表明:1)四平段断裂主要发育于上更新统长英质(含角砾)砂岩层内部,为逆冲推覆断层;2)槽探与钻孔揭露的耕土层、粘土层、泥质砂岩层和长英质(含角砾)砂岩层AMS^(14)C测年结果分别为-70~6270 BP、60~7780 BP、110~21780 BP和11740~26100 BP,断层活动年代总体应归属为前第四纪(>26100 BP);3)结合区域岩浆构造与地震事件可知,本次揭露的NE向隐伏断裂带可能形成于晚更新世。
Based on the regional geological structure survey,geophysical data and remote sensing interpretation,using drilling,trenching and ^(14)C chronology,we discuss and study the age,character and tectonic significance of the NE trending buried fault in Siping section of Yitong-Shulan fault zone.The results show that:1)Siping section is mainly developed in the upper pleistocene felsic(including breccia)sand layer,and belongs to thrust nappe fault;2)AMS ^(14)C dating results of arable soil layer,clay layer,argillaceous sandstone layer and felsic(including breccia)sandstone layer exposed by trenching and drilling are-70~6270 BP、60~7780 BP、110~21780 BP、11740~26100 BP,respectively.The age of fault activity should belong to pre Quaternary(>26100 BP);3)Combined with regional magmatic tectonic and seismic events,the NE trending concealed fault zone exposed in this study may have been formed in the late Pleistocene.
作者
闫东晗
徐智涛
徐岳仁
孙立影
冯靖乔
韩迪
YAN Donghan;XU Zhitao;XU Yueren;SUN Liying;FENG Jingqiao;HAN Di(Institute of Volcanology,CEA,5788 Jingyue Street,Changchun 130117,China;Engineering Earthquake Research Center of Jilin Province,5788 Jingyue Street,Changchun 130117,China;Institute of Earthquake Forecasting,CEA,63 Fuxing Road,Beijing 100036,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2022年第8期835-839,共5页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41872254,41911540472)。
