【摘要】 应用陆相断陷湖盆高分辨率层序地层学的理论和方法,综合利用地震、测井、岩芯等资料,对海拉尔盆地贝西斜坡北部地区层序界面、三级层序内的最大湖泛面和首次湖泛面进行识别,建立了南屯组层序地层格架,划分出两个三级层序(层序I、层序Ⅱ),每个三级层序又划分为3个体系域,其识别标志为地震、露头、测井等资料上的特征,层序I的体系域为N1-HST、N1-TST、N1-LST,层序Ⅱ的体系域为N2-HST、N2-TST、N2-LST,在此基础上,研究了南屯组层序形成的主要控制因素,即构造断裂活动、气候条件、湖平面升降和物源供应。更多还原

【Abstract】 Using the theories and methods of high-resolution sequence stratigraphy in rift lacustrine basins, we analyzed seismic, logging and drilling core data of the Nantun Formation in the northern Beixi Slope area of the Hailaer Basin in order to understand its sequence stratigraphy. We identified third-order sequence boundaries and maximum flooding surfaces and established the sequence stratigraphic framework of the Nantun Formation, which includes two third-order sequences (sequence I and sequence Ⅱ); each can be divided into three systems tracts. Data used in the sequence and systems tract identification include seismic, outcrop, and logging data. Systems tracts in sequence I include N1-HST, N1-TST, and N1-LST. Systems tracts in sequence Ⅱ include N2-HST, N2-TST, and N2-LST. The controlling factors in sequence development are structural rifting, climate condition, lake level change, and sediment supply.更多还原