【摘要】 以层序地层学理论为指导,通过露头、钻井、地震等资料的综合分析,在柴北缘马海凸起古近系-新近系识别出2个二级层序和7个三级层序。可识别出洪积扇-河流、湖泊-湖泊三角洲以及洪积扇-河流-湖泊等三种类型沉积体系。研究区古近系-新近系经历了2次大规模的湖侵,湖盆总体显示出早期充填,中晚期不断发育,末期开始衰退的特点;盆地不同演化阶段的构造沉降与沉积物供应条件不同,沉积体系类型和分布特征也有变化。更多还原

【Abstract】 With the application of the principles of sequence stratigraphy,the strata of naleogene-neogene in mahai swell are divided into two 2nd order sequences and seven 3rd order sequences,by the identification marks of sequence boundary including seismic section,well logging curves,litho-combination and so on.There are two large-scale lake transgressions,identifying proluvial fan-fluvial facies,lake-delta and proluvial-fluvial-lake facies.In different tectonic stages,subsidence background and sediment supply control the sedimentary system types and the development rule of sediment system.更多还原