潮汕盆地断裂构造特征及其晚第四纪活动性初探  

The Characteristics of Faults in the Chaoshan Basin,Guangdong Province and Their Late Quaternary Activity

作　　者：张攀 刘华国 李峰 何萍[2] 贾启超 龚飞 李冰非 Zhang Pan;Liu Huaguo;Li Feng;He Ping;Jia Qichao;Gong Fei;Li Bingfei(China Earthquake Disaster Prevention Center,Beijing 100029,China;Guangdong Earthquake Agency,Guangzhou 510030,China)

机构地区：[1]中国地震灾害防御中心,北京100029 [2]广东省地震局,广州510030

出　　处：《震灾防御技术》2023年第1期82-95,共14页Technology for Earthquake Disaster Prevention

基　　金：国家自然科学基金(42102263);汕头市活动断层探测一期。

摘　　要：潮汕盆地主要受控于北东向和北西向2组断裂构造,盆地及周缘曾发生过多次破坏性地震。因此,厘定相关断裂的构造特征和第四纪活动性,对合理评估区域地震危险性至关重要。在系统总结和分析已有第四系钻孔年代学的基础上,采用野外地质调查与地球物理勘探相结合的方法,对潮汕盆地及周缘断裂构造开展详细的研究工作。盆地周缘基岩区断裂构造野外解析表明,北西向断裂具有正断层性质,兼具左行走滑特征,北东向断裂以逆冲变形为主。结合盆地第四系覆盖区浅层人工地震探测和已有地层年代学分析结果,进一步厘定了榕江断裂、韩江断裂、饶平-汕头断裂和普宁-潮州断裂在潮汕盆地内的几何学展布和晚更新世以来的活动特征。The Chaoshan basin is mainly controlled by NE and NW trending faults,and many destructive earthquakes occurred in the basin and its surrounding areas.Therefore,determining the structural characteristics and Quaternary activity of these faults are very important to evaluate the regional seismic risk.In this paper,we conducted an integrated investigation involving detailed field observation,geophysical study,and synthesis of existing borehole geochronology data across the Chaoshan basin.The NW-trending faults are characterized by normal fault with left lateral movement,and the NE-trending faults are mainly trusting deformation.Combined with the shallow artificial seismic exploration,we further revealed the geometric distribution of the Rongjiang,Hanjian,Raoping-Shantou,and Puning-Chaouzhou faults in the Chaoshan basin,and discussed their late Quaternary activity.

关 键 词：潮汕盆地 断裂构造 几何展布 晚第四纪活动 

分 类 号：P534.63[天文地球—第四纪地质学] P315.5[天文地球—古生物学与地层学]