龙门山南段山前印支晚期隐伏生长褶皱的构造几何模拟与分析
摘要
经高分辨率处理后的地震剖面展示了龙门山南段山前大邑地震勘探区的深部存在一隐伏的生长断层转折褶皱.对地震剖面的构造变形以及褶皱两翼生长前、生长期间和生长后地层的变形几何关系进行了详细的构造解析;利用断层转折褶皱几何变形的计算机模拟技术对大邑深部隐伏生长断层转折褶皱进行了不同沉积速率时几何变形过程的模拟,提取构造特征与实际地震反射剖面进行对比.研究结果表明,龙门山南段山前也存在印支晚期的低角度逆冲推覆过程,构造活动发生在须家河四段(T3x4)中上部沉积期间,与龙门山北段山前印支晚期的逆冲推覆过程相对应,但推覆位移量较北段小.
引文
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5Jia D,Wei G Q,Chen Z X,et al.Longmen Shan fold-thrust belt and its relation to the western Sichuan Basin in Central China:New insights from hydrocarbon exploration.AAPG,2006,90(9):1425—1447
6Medwedef D A.Growth fault-bend folding at southeast Lost Hills,San Joaquin Valley,California.AAPG Bull,1989,73:54—67
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