海洋地质与第四纪地质2017，Vol.37Issue(3)：147-156,10.DOI:10.16562/j.cnki.0256-1492.2017.03.015
东营凹陷沙河街组沙三下-沙四上亚段泥页岩岩相与沉积环境的响应关系
LITHOFACIES OF MUDSTONE AND SHALE DEPOSITS OF THE Es3z-Es4s FORMATION IN DONGYING SAG AND THEIR DEPOSITIONAL ENVIRONMENT
摘要
Abstract
The features of mineralogy,organic matter and lithofacies of mudstones and shale are controlled by depositional environment.An amount of samples selected from the Shahejie Formation in the Dongying depression are studied by the authors by means of microscope,X-ray diffraction,pyrolytic analysis and chemical analysis.The results are used to establish the relationship between the element geochemistry and types of lithofacies,upon which the relationship between depositional environment and lithofacies is further revealed.The lithofacies of mudstone/shale includes thin laminated shale,discontinuous laminated shale,thick laminated shale,homogenous massive mudstone and the mudstone with anhydrite-relict.Their depositional environments are obviously different.During the time while the sub-member of Es4 cxEs3x was deposited,the lake evolved from deep to shallow and from saline to fresh,and was in an anoxic environment during the whole period.There is a close relationship between lithology and environment.In the early Es4c,it was a shallow and salty lake with deposition of anhydrite-relict mudstone and homogeneous massive mudstone;the upper Es4c is mainly consisting of laminated shale at the bottom and homogeneous massive mudstone on the top,as the lake changed from a salty to a brackish lake;the lower Es3 represents a deep fresh lake,rich in laminated shale.In conclusion,both the rock types and their hydrocarbon potentials are controlled by depositional environment.In this regard,further research is suggested on the relationship between lithofacies of mudstone/shale and their depositional environment.关键词
泥页岩岩相/沉积环境/沙河街组/东营凹陷Key words
lithofacies of mudstone and shale/sedimentary environment/the Shahejie Formation/Dongying Sag分类
能源科技引用本文复制引用
刘庆,曾翔,王学军,蔡进功..东营凹陷沙河街组沙三下-沙四上亚段泥页岩岩相与沉积环境的响应关系[J].海洋地质与第四纪地质,2017,37(3):147-156,10.基金项目
国家自然科学基金项目(41672115) （41672115）
国家油气重大专项(2016ZX05006001-003) （2016ZX05006001-003）
