Genetic Model of the Deep Water Salt Lake of the Paleogene Sha-4 Member in Dongying Sag
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摘要: 东营凹陷下第三系沙四段广泛发育的蒸发岩类与暗色泥、页岩和深水浊积砂体呈现明显韵律层,为厚度达千米的盐湖沉积。通过分析了该地区蒸发岩地层的沉积特征和沉积条件,认为东营凹陷沙四段蒸发岩类的物质基础是深层卤水 深部古老地层中的盐类物质是其盐源 凹陷中北部的同沉积深大断裂是沟通凹陷与地壳深部盐类物质的通道。在此基础上提出东营凹陷沙四段盐湖的深水成因模式,可与东非裂谷基伍湖和东濮凹陷下第三系深水成因盐湖对比。Abstract: There were cyclothems consisted of evaporite rocks,deep color mudstones or shales and deep water turbidity sediments of Peleogene Sha-4 member in Dongying sag,which was salt lake sedimentary assemblage with more than 1000m in thickness.The evaporite rocks consisted of halite and anhydrite rocks mainly existed in north and centre of Dongying sag where the deep fractures developed.The fossil assemblage indicated that the climate was semi-dry and semi-moist in Paleogene Sha-4 member in Dongying sag.Analyzed the sedimentary characteristics and depositional conditions,the authors considered that the brine in deep water was the substance basis of the salt sediment,the salt in deep strata was the source of brine and the deep fractures in the north of the sag were the paths where the salt substance entered the developing sag.The deep water genesis model of salt lake in Dongpu sag which can be compared with that of Lake Kivu,was put forward after the discussion.The new field in subsalt strata exploration can be found on the basis of the lithofacies assemblage of source rock and evaporite rock.
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Key words:
- the Paleogene /
- Sha-4 member in Dongying sag /
- salt lake
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[1] 袁见齐，霍承禹，蔡克勤.高山深盆的成盐环境—一种新的成盐模式的剖析[J].地质论评，1983，29(2)：159～165 [2] 纪友亮，张世奇等编著.陆相断陷湖盆层序地层学[M].北京：石油工业出版社，1996.100～101 [3] 金强，黄醒汉.东濮凹陷旱第三纪盐湖成因的探讨—一种深水成因模式[J].华东石油学院学报，1985(1)：1～13 [4] 孙镇城，杨藩，强枝焕等.中国新生代咸化湖泊沉积环境与油气生成[M].北京：石油工业出版社，1997，167～170 [5] 王秉海，钱凯主编.胜利油区地质研究与勘探实践[M].山东东营：石油大学出版社，1992.189 [6] 赵澄林，刘孟慧，姜在兴等.渤海湾旱第三纪断陷盆地含油气岩系沉积学及沉积相的基本特征[J].石油学报，1991，12(2)：28～32 -
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