【摘要】 通过区域地质背景分析、地震反射特征等识别出准噶尔盆地滴南凸起二叠系底面、三叠系顶面以及两系之间的分界面均为层序界面,且这3个界面均是区域性的岩性突变面.受其启示,对三叠系克拉玛依组和白碱滩组的分界面进行了分析,发现该界面同样为区域性的岩性界面,同时还是地层缺失面、地震强反射界面,判断其亦为层序界面.因此,本区二叠系、三叠系共划分为3个层序,在每个层序内部又进行了体系域的划分.更多还原

【Abstract】 Based on the characters of seismic reflections and the analysis of geologic setting in the Dinan uplift in Junggar basin,three boundaries of sequence are recognized,i.e.the bottom of Permian,the top of Triassic and the boundary between Permian and Triassic.These boundaries are unexceptionally regional surfaces of abrupt change of lithology and well logging.Enlightened by this recognition,the boundary between Karamay and Baijiantan formations is analyzed.The result shows that this regional lithologic face also behaves as stratum absent face and strong seismic phase axis.Therefore it is a sequence boundary.Totally three sequences with seven system tracts are divided for the Permian and Triassic strata in the Dinan uplift.更多还原