柴达木盆地北缘马海凸起古近系—新近系层序地层格架
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摘要
以层序地层学理论为指导,通过露头、钻井、地震等资料的综合分析,在柴北缘马海凸起古近系-新近系识别出2个二级层序和7个三级层序。可识别出洪积扇-河流、湖泊-湖泊三角洲以及洪积扇-河流-湖泊等三种类型沉积体系。研究区古近系-新近系经历了2次大规模的湖侵,湖盆总体显示出早期充填,中晚期不断发育,末期开始衰退的特点;盆地不同演化阶段的构造沉降与沉积物供应条件不同,沉积体系类型和分布特征也有变化。
With the application of the principles of sequence stratigraphy,the strata of naleogene-neogene in mahai swell are divided into two 2nd order sequences and seven 3rd order sequences,by the identification marks of sequence boundary including seismic section,well logging curves,litho-combination and so on.There are two large-scale lake transgressions,identifying proluvial fan-fluvial facies,lake-delta and proluvial-fluvial-lake facies.In different tectonic stages,subsidence background and sediment supply control the sedimentary system types and the development rule of sediment system.
With the application of the principles of sequence stratigraphy,the strata of naleogene-neogene in mahai swell are divided into two 2nd order sequences and seven 3rd order sequences,by the identification marks of sequence boundary including seismic section,well logging curves,litho-combination and so on.There are two large-scale lake transgressions,identifying proluvial fan-fluvial facies,lake-delta and proluvial-fluvial-lake facies.In different tectonic stages,subsidence background and sediment supply control the sedimentary system types and the development rule of sediment system.
引文
[1]胡勇.柴达木盆地北缘西段冲断带油气成藏研究[M].广州:中国科学院研究生院,2004.
[2]纪友亮,赵贤正,单敬福,等.冀中坳陷古近系沉积层序特征及其沉积体系的演化[J].沉积学报,2009,27(1):49-55.
[3]林畅松,刘景彦,张英志,等.构造活动盆地的层序地层与构造地层分析-以中国中新生代构造活动湖盆分析为例[J].地学前缘,2005,12(4):365-374.
[4]彭晓波,高日胜,胡小强,周口坳陷谭庄-沈丘凹陷下白垩统断裂特征分析[J].煤炭术,2011,30(1):134-136.
[2]纪友亮,赵贤正,单敬福,等.冀中坳陷古近系沉积层序特征及其沉积体系的演化[J].沉积学报,2009,27(1):49-55.
[3]林畅松,刘景彦,张英志,等.构造活动盆地的层序地层与构造地层分析-以中国中新生代构造活动湖盆分析为例[J].地学前缘,2005,12(4):365-374.
[4]彭晓波,高日胜,胡小强,周口坳陷谭庄-沈丘凹陷下白垩统断裂特征分析[J].煤炭术,2011,30(1):134-136.
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