右江断裂带旧州—泽屯小段的地貌与第四纪活动图像  

Geomorphology and Quaternary Activity Images of Jiuzhou-Zetun Sub Segment in Youjiang Fault Zone

作　　者：张沛全 左天惠 邹衍 莫焱兰 杨会丽[4,5] ZHANG Peiquan;ZUO Tianhui;ZOU Yan;MO Yanlan;YANG Huili(Earthquake Agency of Guangxi Zhuang Autonomous Region,Nanning 530022,China;Earthquake Risk Prevention Center of Guangxi Zhuang Autonomous Region,Nanning 530022,China;Natural Resources Survey and Monitoring Institute of Guangxi Zhuang Autonomous Region,Nanning 530201,China;State Key Laboratory of Seismic Dynamics,Beijing 100029,China;Institute of Geology,China Earthquake Administration,Beijing 100029,China)

机构地区：[1]广西壮族自治区地震局,南宁530022 [2]广西壮族自治区震灾风险防治中心,南宁530022 [3]广西壮族自治区自然资源调查监测院,南宁530201 [4]地震动力学国家重点实验室,北京100029 [5]中国地震局地质研究所,北京100029

出　　处：《华南地震》2024年第3期1-10,共10页South China Journal of Seismology

基　　金：广西自然科学基金(2018GXNSFAA281323)。

摘　　要：为探讨右江断裂带百色以西段北支旧州—泽屯小段的第四纪活动特征,从右江上游的乐里河、澄碧河流域的构造地貌研究入手,首先对两条河流开展遥感地质解译,利用河流地貌与断层活动的响应关系获取断层的可能部位,对断层活动可能出露的部位开展路线地质地貌调查并进行验证,试图勾勒出该小段断裂带的第四纪活动图像,最后讨论了该小段断裂带的第四纪活动的成熟度。遥感地质解译和野外调查的结果显示:旧州—泽屯小段断裂带的第四纪活动图像与构造物理实验中的R剪切断层发育阶段图像相似,其成熟度低。这可能是该小段断裂带至今缺乏5.0级以上的高震级地震记录的原因之一。In order to explore the Quaternary activity characteristics of the Jiuzhou-Zetun sub segment in the northern branch of the western Baise section of the Youjiang fault zone,this paper first studied tectonic geomorphology of the Leli River and Chengbi River in the upper reaches of the Youjiang River.Firstly,remote sensing geological interpretation was carried out on the two rivers,and the response relationship between river geomorphology and fault activity was used to obtain the possible location of the fault.Geological and geomorphological surveys were conducted to verify the locations where fault zone activity may occur.The Quaternary activity images of the fault zone of the sub segment were sketched out.Finally,the maturity of the Quaternary activity of the fault zone was discussed.The results of remote sensing geological interpretation and field investigation show that the Quaternary activity images of the fault zone of the Jiuzhou-Zetun sub segment are similar to the images of the R shear fault in the development stage in tectonic physics experiments,and their maturity is low.This may be one of the reasons why there is still a lack of records about high magnitude earthquakes above 5.0 in this fault zone of the sub segment.

关 键 词：右江断裂带 构造地貌 走滑断层 里德尔剪切 第四纪 断层成熟度 倾斜摄影测量 

分 类 号：P931.1[天文地球—自然地理学] P931.2P546P65P231