庞军刚,国吉安,李文厚,李卫红

• 1:西安石油大学油气资源学院
• 2:西北大学地质学系/大陆动力学国家重点实验室
• 3:核工业203所

摘要(Abstract)：

鄂尔多斯盆地白垩纪古沙漠沉积地层主要为冲积扇、湖泊、河流、三角洲及沙漠沉积体系。风成沉积和沙漠沉积、风成沉积体系和沙漠沉积体系等概念有必要予以区分。基准面变化是沙漠和河流、湖泊等其他陆相地层对比的基础。鄂尔多斯盆地志丹群划分为上下两个三级层序单元,反映了两期古沙漠由风成沉积强盛期到衰退期的演化,且每个层序可划分为低位、水进和高位体系域,沙漠层序体系域划分的原则是不同沉积体系之间的空间比例中占主导地位的沉积类型。在不同的体系域,冲积、风成和干旱湖泊等沉积体系在空间配置上有很大的差别。针对目前存在的问题展望了其发展趋势。

关键词(KeyWords)： 古沙漠;沉积体系;层序地层;白垩系;鄂尔多斯

Abstract:

Keywords:

基金项目(Foundation): 国家重点基金研究发展计划项目(2003CB214602);; 长江学者和创新团队发展计划资助(IRT0559)资助

作者(Author): 庞军刚,国吉安,李文厚,李卫红

DOI: 10.19839/j.cnki.dcxzz.2011.01.012

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