现代地质2018，Vol.32Issue(2)：227-239,13.DOI:10.19657/j.geoscience.1000-8527.2018.02.02
东濮凹陷北部沙河街组三段中亚段沉积环境分析
Analysis of the Sedimentary Environment in the North of Dongpu Depression During the Deposition of the Middle Section of the Third Member of the Shahejie Formation
摘要
Abstract
The salt rocks and source rocks are extensively developed in the middle section of the third Memberof Shahejie Formation in the North of Dongpu Depression and the two seemingly coexisting substances are inter-mixed here.In this period,the sedimentary characteristics of the study area were the continuous deposition ofmulti-salt rhythm and multi-layer hydrocarbon source rocks.Individual salt rhythms vary in thickness from a fewmeters to more than ten meters,the hydrocarbon source rocks have high organic matter abundance and the typeis good.In the plane,the two are symbiotic with the sedimentation center of the lake basin,and in the vertical,high organic matter abundance,good kerogen type and high salinity formation have a better correspondence.Therefore,it has become an important research object for the restoration of paleoclimate and paleoenvironment.We studied the sedimentary environment of the middle section of the third Member of Shahejie Formation in theNorth of Dongpu Depression through petrology,paleontology,and the methods of Sr/Ba,B/Ga,(V + Ni +Mn),Fe/Mn,Sr/Cu,Mg/Ca,V/(V + Ni),as well as REE content and chlorine isotope.The results showed that the sedimentary environment of the middle section of the third Member of Shahejie Formation in the North of Depression was the reduction environment of the deep-water deposition,and the ancient salinity was a little high,which is semi-saltwater-saltwater deposition.The trace elements and the spore fossils indicate the environment of the middle section of the third Member of Shahejie Formation in the study area was warm and humid.关键词
东濮凹陷/沙三中亚段/沉积环境/古盐度/古气候/古水深/氧化还原环境Key words
Dongpu depression/the middle section of the third Member of Shahejie Formation/sedimentary environment/paleosalinity/paleoclimate/paleo-water-depth/redox property分类
能源科技引用本文复制引用
李被,刘池洋,黄雷,蒋飞虎,郭佩,鹿坤..东濮凹陷北部沙河街组三段中亚段沉积环境分析[J].现代地质,2018,32(2):227-239,13.基金项目
国家自然科学基金重点项目(41330315,41602111) （41330315,41602111）
西北大学优秀博士学位论文资助项目(YYB17024) （YYB17024）
西北大学大陆动力学国家重点实验室专项课题(201210141). （201210141）
