摘要
在层序地层学研究的基础上,对柴达木盆地阿尔金斜坡地区上、下油砂山组进行了详细的沉积相研究,分析了冲积扇相、河流-泛滥平原相、三角洲相、扇三角洲相、湖泊相等几种类型沉积相特征。并按识别出的4个二级层序,推测了古沉积相的平面展布特征,总结了由于构造抬升造成的新近系湖盆演化和向东迁移规律。结合古构造、古气候、物源供给等分析了阿尔金斜坡地区上、下油砂山组沉积相演化的控制因素。
This paper presents the in-depth sedimentary facies characteristics of upper and lower Youshashan formation in Altun slope area, Qaidam basin based on the sequence stratigraphic study, and includes the alluvial fan facies, the fluvial-floodplain facies, the delta facies, the fan-delta facies and the lacustrine facies, etc. Using four second-order sequences identified, plane distribution of each sedimentary facies is discussed, and the Neogene lake basin evolution and eastward movement caused by tectonic uplift are speculated. In terms of paleostructure, paleoclimate and sedimentary source recharge, the dominant factors for Youshashan sedimentary facies evolution are analyzed.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2005年第2期172-174,共3页
Xinjiang Petroleum Geology
