蒙古国东部塔木察格盆地南部白垩系地层结构及沉积充填特征  

Stratigraphic architecture and sedimentary infilling characteristics of the Cretaceous in southern Tamuchage Basin,East Mongolia

作　　者：纪友亮[1] 蒙启安 曹瑞成 渠永红 张革 

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油大庆油田勘探开发研究院,黑龙江大庆163453

出　　处：《古地理学报》2010年第6期729-736,共8页Journal of Palaeogeography：Chinese Edition

基　　金：国家"973"科技攻关项目"中国典型叠合盆地隆坳格局形成演化与岩性地层圈闭发育模式"(编号:2006CB202302)资助

摘　　要：盆地的古地形及构造坡折带的形态和类型决定其沉积充填的特征和储集层砂体的分布。根据对蒙古国东部塔木察格盆地南部地区南贝尔凹陷和塔南凹陷的盆地边缘的古地貌结构特征分析,将南贝尔凹陷和塔南凹陷白垩纪发育的古构造坡折带划分为4种类型,分别控制着4种类型沉积相的形成和分布。断崖型坡折带控制近岸水下扇相及前方的远岸湖底扇相的形成和分布;断阶型坡折带控制扇三角洲相和近岸水下扇相的形成和分布;缓坡型坡折带控制扇三角洲相的形成和分布。在基准面下降阶段,盆内坡折带控制着远岸湖底扇的形成和分布。The paleogeomorphology, shape and type of slope break belt of a basin control the infilling characteristics of sediments and the distribution of reservoir sandbodies.According to the analyses of the configuration of paleogeomorphology and paleotopography of the margin of South Beir and Tanan Sags,the paleo-slope break belt of South Beir and Tanan Sags developed during the Cretaceous were divided into 4 types which controlled the formation and distribution of 4 types of sedimentary facies.Faulted scarp and steep slope break belt controlled the development of neritic subaqueous fan facies;Faulted terrace type slope break belt controlled the development of fan delta and neritic subaqueous fan facies;Gentle slope break belt controlled the development of fan delta facies.In base level falling stage,the inner-basin slope break belt controlled the formation and distribution of the sublacustrine fan facies.

关 键 词：古地形 层序结构 坡折带 南贝尔凹陷 塔南凹陷 

分 类 号：P512.32[天文地球—地质学]