日照—连云港地区主要断裂重磁异常特征  

Magnetic and gravity anomaly characteristics of main faults in Rizhao-Lianyungang area

作　　者：张玄杰[1] 张婉[1] 佟晶[1] 范子梁[1] 李筱 

机构地区：[1]中国国土资源航空物探遥感中心,北京100083

出　　处：《中国地质调查》2017年第6期66-70,共5页Geological Survey of China

基　　金：国家专项"海洋航空地球物理探测及应用(编号:GZH200900502)";中国地质调查局"海南岛及周边航空物探调查(编号:DD20160141)"项目联合资助

摘　　要：为满足1∶25万海洋区域地质调查需求,解决海陆过渡区的基础地质问题,在统一编制1∶25万重力异常图和磁力异常图的基础上,分析日照—连云港地区主要断裂的重磁异常特征。结合区域地质资料,探讨郯庐断裂沂水段、桑墟—连云港断裂、东海—赣榆断裂的重磁异常特征及其地质意义。结果表明:昌邑—大店断裂是郯庐断裂沂水段的主断裂;作为苏鲁造山带的南部边界,桑墟—连云港断裂控制了基底、地层和岩浆岩的分布;东海—赣榆断裂将苏鲁造山带分割为南、北2部分。这些新认识为日照—连云港地区基础地质研究提供了重要参考。In order to meet the requirements of 1 ∶ 250 000 regional marine geological survey and solve essential geological problems of the onshore-offshore transition zone,based on the compilation of 1∶ 250 000 magnetic and gravity anomaly map,the authors analyzed the magnetic and gravity anomaly characteristics of the main faults in Rizhao-Lianyungang area. According to regional geological materials,the authors discussed the magnetic and gravity anomaly characteristics and geological significances of the main faults,such as Yishui segment of Tanlu fault,Sangxu-Lianyungang fault and Donghai-Ganyu fault. The results show that Changyi-Dadian fault is the main fault of Yishui segment of Tanlu fault. And as the southern boundary of Sulu orogenic belt,Sangxu-Lianyungang fault controls the distribution of basement,strata and magmatic rocks. In addition,Donghai-Ganyu fault cuts Sulu orogenic belt into southern and northern segments. These new geological recognitions have provided important references for the geological research in Rizhao-Lianyungang area.

关 键 词：磁异常特征 郯庐断裂 连云港地区 重磁场特征 扬子板块 断裂带 中生界 布格重力异常 新生界 苏鲁造山带 古生界 前寒武系 

分 类 号：P631.125[天文地球—地质矿产勘探] P631.222[天文地球—地质学]