珠一坳陷古近系典型凹陷类比分析  

作　　者：王瑞菊[1] 邓宏文[1] 郭建宇[2] 

机构地区：[1]中国地质大学,北京100083 [2]中国石油勘探开发研究院海外研究中心,北京100083

出　　处：《内蒙古石油化工》2008年第21期108-112,共5页Inner Mongolia Petrochemical Industry

摘　　要：惠州凹陷与西江、恩平凹陷同处珠一坳陷中部,其基本结构单元均为半地堑。珠一坳陷在古近系经历了断陷、断坳和坳陷演化阶段,各凹均具有下断上坳、先陆后海的双层结构,因而其古近系沉积充填特征具有相似性。但区域构造位置、边界断裂性质、盆地结构与构造演化的差异也导致惠州与西江、恩平凹陷沉积中心,湖区分布、主要物源供给方向、物源体系的形成与分布、沉积体系类型与沉积特征等方面的差异性。Sag of Huizhou,Xijiang and Enping are all located in the central of Zhu Ⅰdepression,and the basic structure of the unit are all half-graben.Zhu Ⅰdepression experienced the evolutional stage from rift to depression in the Paleogene,so the sedimentary structure is characterized by a fault depression in earlier stage and a depression in later stage,and have the two-tier structure of marine strata deposited after continental sedimentary strata,therefore all the sags of Zhu Ⅰdepression have the similar feature of sedimentary and filled during that period.Because of the disparity between areal structural location,the palaeogeomorphology and the configuration and property of different depression border faults cause the divergence of different depression sequence stratigraphic configuration and filling characteristic.

关 键 词：半地堑 沉积体系 转换带 物源体系 层序地层构型 

分 类 号：TQ02-42[化学工程] P618.130.2[天文地球—矿床学]