Application and Understanding of Regional Gravity Survey in Jixian-Cangzhou Area
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摘要: 蓟县-沧州地区进行1/25万区域重力测量取得了初步的调查研究成果。根据区域重力场特征,在该研究区划出24条断裂和4条重要梯级带。根据断裂构造分布情况和该区地质资料,对研究区进行了构造单位的划分,其划分11个III级构造单元和19个IV级构造单元。同时,还对研究区盆地构造格局与油气田的关系、断裂构造与以往地震发生点的关系进行了分析。Abstract: This article summarizes the entire process of regional gravity survey at the scale of 1:250 000. The pro-cess includes instrument preparation for the field, GPS net linking and gravity base-point net linking, data acquisi-tion, data processing, interpretation of gravity anomaly and comprehensive research. Through regional gravity survey in Jixian-Cangzhou area, the project has preliminary achievement. According to the characteristics of re-gional gravity field, authors outline twenty four fracture lineaments and four important gradient belts;based to ge-ologcal data and distribution of tectonic fractures, authors outline eleven III grade structural units and nineteen IV grade structural units;analyze the relationship between oil-gas field and basin tectonic framework, and the rela-tionship between previous earthquake location and fault structure in the study area.
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Key words:
- regional gravity survey /
- GPS measurement /
- fault /
- oil-gas field /
- earthquake
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