断陷湖盆碳酸盐与陆源碎屑混合沉积——以东营凹陷金家地区古近系沙河街组第四段上亚段为例  

Mixed Siliciclastic—carbonate Sediment in Rift Lacustrine Basin——a Case on the Upper Part of the Fourth Member of the Eogene Shahejie Formation in Jinjia Area, Dongying Depression

作　　者：张金亮[1] 司学强[1] 

机构地区：[1]中国海洋大学海洋地球科学学院

出　　处：《地质论评》2007年第4期448-453,I0001,共7页Geological Review

摘　　要：混合沉积是一种特殊的沉积类型,研究程度较低。金家地区处于东营凹陷的斜坡带,该区古近系沙河街组第四段上亚段发育了碳酸盐与陆源碎屑的混合沉积,研究认为该混合沉积为古湖泊内的混合沉积,可划分为混积砂滩亚相、混积砂坝亚相及半深湖混积亚相,混合沉积物既包括同层混合沉积物(灰质砂岩、砂质灰岩、泥质灰岩等),又包括互层混合沉积物(砂岩与颗粒灰岩互层沉积等),研究区的混合沉积受当时构造运动、碎屑物质供给量、湖平面的变化等诸多因素控制。The mixed siliciclastic--carbonate deposit is a kind of peculiar sedimentary type, and the research about it is too little. The upper part of the 4th member of the Eogene Shahejie Formation in Jinjia area, Dongying depression, is a suite of lacustrine mixed siliciclastic--carbonate deposit. Based on recognition of rock core and studying of thin section under microscope, the mixed deposit in the study area can be divided into three sub-facies, and the mixed sediments contain both syn-bed type （ lime--sandstone, sandy limestone, argillaceous limestone, et al. ） and interbedded type. The mixed sedimentation was controlled by tectonism, material supply, lacustrine level change and many other factors.

关 键 词：东营凹陷 混合沉积 陆源碎屑 碳酸盐 断陷湖盆 

分 类 号：P512.2[天文地球—地质学]