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Neogene sedimentary facies and palaeogeography of western Qaidam Basin, Qinghai
Author(s): 
Pages: 31-36
Year: Issue:  2
Journal: Sedimentary Geology and Tethyan Geology

Keyword:  柴西新近纪岩相古地理;
Abstract: 通过对研究区新近系露头及钻井剖面的岩性、结构构造、古生物的综合分析,将柴西地区新近系沉积相划分为5种相和亚相:扇三角洲、河流-泛滥平原、滨湖、浅湖、半深湖.沉积相的空间展布大体以茫崖和大风山为沉积中心,到盆地边缘依次发育半深湖相、浅湖相、滨湖相,并呈环带状分布.扇三角洲相和河流泛滥平原相发育于昆仑山和阿尔金山前.古地形为西高东低,南高北低,物源来自阿尔金山和昆仑山,气候炎热干旱.下油砂山组为较好的烃源岩,储层主要为孔隙性碎屑岩储层和裂缝性非常规储层两种.
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