城市地质2025，Vol.20Issue(4)：447-453,7.DOI:10.3969/j.issn.2097-3764.2025.04.005
珠三角浅覆盖区断裂精准探查
Precise exploration of faults in the shallow overburden area of the Pearl River Delta-Taking the Taihe-Shihu Section of Guangcong Fault as an example
摘要
Abstract
The Pearl River Delta region features extensively distributed Quaternary strata,with most faults being concealed,rendering fault structure identification challenging via traditional geological survey methods alone.Thus,rapid,effective,and accurate detection of faults in shallow overburden areas of the Pearl River Delta is of particular importance.Drawing on geological surveys in Guangzhou and research on basement faults in the Pearl River Delta,this study synthesizes precise fault detection methods—including shallow seismic surveys,borehole profiling,and cross-hole elastic wave CT—and presents a case study of fault exploration along the Taihe-Shihu segment of the Guangcong Fault.Precise exploration reveals that the Taihe-Shihu segment of the fault strikes northeast at 38°,dips northwest with an angle of 55°-60°,and has a main fracture zone approximately 70 m wide.Its latest tectonic activity,characterized by extensional normal faulting,is relatively recent,and rocks within the fault zone are loose and fragmented.Comprehensive analysis indicates that the integrated approach of"shallow seismic exploration+borehole profiling+cross-hole elastic wave CT detection"is highly effective for fault exploration and well-suited for precise fault detection in shallow overburden areas.It can provide a scientific geological basis for urban planning and engineering construction in the Pearl River Delta region.关键词
浅覆盖区/广从断裂/精准探查/断裂特征Key words
shallow overburden area/Guangcong Fault/precise exploration/fault characteristics引用本文复制引用
孙社良,林小明,张献河,易隆科,贺强翔..珠三角浅覆盖区断裂精准探查[J].城市地质,2025,20(4):447-453,7.基金项目
广东省国土资源保护与治理专项—珠江三角洲基底断裂探查研究([2017]201)资助 （[2017]201）
