区域性地震安全性评价目标区地震构造特征研究——以三江口港产城新区为例

Research on the Seismic Structure Characteristics of the Target Area of Regional Seismic Safety Evaluation——Taking Gangchancheng New District in Sanjiangkou as an Example

目标区地震构造调查是区域性地震安全性评价的基础工作。以广西来宾市三江口港产城新区为例,在收集、整理、分析已有的地层、地质资料的基础上,采用遥感解译、地形地貌分析、地震地质调查等手段,开展了目标区地震构造调查研究。调查结果显示:目标区发育早第四纪断陷盆地和3条早第四纪断裂,前者是区域间歇性升降运动和断块差异性抬升运动等新构造运动的产物,后者是断陷盆地发育过程中形成的伴生断裂。

The seismic structure survey in the target area is the basic work of regional seismic safety evaluation.Taking the Sanjiangkou New District in Laibin City,Guangxi as an example,based on the collection,sorting and analysis of existing stratigraphic and geological data,remote sensing interpretation,topography and geomorphology analysis,this paper carries out the seismic structure investigation and research of the target area by means of remote sensing interpretation,topographic and geomorphic analysis and seismic geological survey.The target area has developed Early Quaternary faulted basins and three early Quaternary faults.The former is the product of neotectonic movements such as regional intermittent uplifting and differential uplifting of fault blocks,and the latter is the associated fault formed during the development of the depression basin.