江苏茅山断裂带中段重力异常多尺度分析及其构造识别  

Multi-scale analysis of gravity anomalies and its discernment of structures in the middle segment of the Maoshan faulted zone

作　　者：滕龙[1] 邸兵叶[1] 张俊[1] 

机构地区：[1]中国地质调查局南京地质调查中心,南京210016

出　　处：《资源调查与环境》2015年第1期49-56,共8页Resources Survey & Environment

基　　金：中国地质调查局地质调查项目"江苏1:5万长乐;上沛埠;高淳县;东坝幅重力调查项目"(项目编号:1212011087041)资助

摘　　要：采用小波变换多尺度分析,将茅山断裂带中段的重力数据分解为不同尺度的重力异常,用于研究该区的地质构造特征。小波变换多尺度分析可以将重力数据分解为不同深度的局部异常和区域异常,局部异常解释为浅部地质体引起,区域异常解释为深部地质体引起。基于此种地质解释,分析了不同深度地质体与重力异常的对应关系,并对产生异常的原因进行解释,推断出该区的主要断裂构造,并对已有研究成果进行修正。研究结果表明,断裂带中段的构造形式与重力异常之间有较好的对应关系。By using the multi-scale analysis of wavelet transforms,the gravimetric data of the middle segment of the Maoshan faulted zone in Jiangsu Province are resolved into different-scale gravity anomalies in order to study the geological-structural characteristics of the studied area.The gravimetric data may be resolved into local anomalies and regional anomalies at different depths,using the multi-scale analysis of wavelet transforms,the result shows that the local anomalies are caused by shallow geological bodies while the regional anomalies are caused by deep geological bodies.Basing on such geological interpretation,the correspondence relationship between geological bodies at different depths and gravity anomalies is analyzed,the causes of anomalies are interpreted,the main faulted structures in the area are inferred and the obtained research results have been corrected.The results show that there is a reliable correspondence relationship between structural patterns and gravity anomalies for the middle segment of the Maoshan faulted zone.

关 键 词：重力异常 小波变换多尺度分析 茅山断裂带 

分 类 号：P631[天文地球—地质矿产勘探]