关于长堤断层性质的探讨

The discussion about the property of Changdi fault

根据高分辨率三维地震资料和钻井资料分析了长堤断层及其伴生构造的构造特征。初步研究结果表明,长堤断层带呈雁行排列,具有走滑性质;断层两盘构造变形和地层差异明显,在地震剖面上发育完好的花状构造;主断层两侧地层中存在雁列褶皱;主断层与郯庐断裂基本平行,其走滑作用主要发生在晚侏罗—早白垩世。

According to the high-resolution 3-D seismic data and the well data, the structural features of Changdi and its associated structures are analyzed. The primary studied results show that the Changdi fault zone presents an echelon arrangement and is of property of strike-slip fault; The tectonization of the two sides and stratigraphic difference are obvious, a well developed festoon structure are showed on the section; en echelon folds exist in the two side formations of the major fault; the Changdi fault basically parallel to Tanlu fault zone, strike-slip action occurred in Late Jurassic-Early Mesozoic.