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 。
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.
出处
《沉积学报》
CAS
CSCD
北大核心
2000年第1期114-118,共5页
Acta Sedimentologica Sinica
基金
中国石油天然气总公司九五科技工程项目! (编号 970 2 0 6 0 2 0 1)
关键词
东营陷
沙四段
盐湖
深水成因模式
沉积
the Paleogene Sha-4 member in Dongying sag salt lake genetic model in deep water
