摘要
在分析大量钻井、测井剖面以及相标志的基础上,对柴西南地区上干柴沟组沉积相进行了研究。研究表明,该研究区发育湖泊相、辫状河三角洲相、湖底扇相3种沉积相类型,其中浅湖亚相是湖泊相中的主要亚相类型,由浅湖砂坝、浅湖泥、浅湖灰泥、藻灰岩、浅湖鲕粒(生物碎屑)滩和风暴沉积组成。辫状河三角洲相以发育辫状河三角洲前缘亚相为主,该亚相可进一步划分为水下分流河道、水下天然堤、支流间湾和河口砂坝微相;湖底扇相主要发育于七个泉地区,其中发育典型浊积岩层序序列。
Sedimentary facies of the upper Ganchaigou Formation in the southwestern Qaidam Basin is studied based on the analysis for a lot of drilling,logging profiles and phase marks,combined with previous research results.Studies show that lake facies,braided river delta and lake floor fan facies developed in the study area,in which the shallow lake subfacies is the main type which is composed of shallow lake sandbar,shallow lake mud,shallow lake plaster,algal limestone,shallow lake oolitic bank and storm deposit..The main type of braided river delta is braided delta front subfacices which can be further divided into the underwater distributary channel,underwater natural barrier,the tributary bay and mouth bar microfacies.Sublacustrine fan facies mainly developed in Qige-Quan area,including typical turbidite strata sequence.
出处
《长江大学学报（自然科学版）》
CAS
2011年第5期58-61,8,共4页
Journal of Yangtze University(Natural Science Edition)
关键词
柴达木盆地
柴西南地区
上干柴沟组
沉积相
Qaidam Basin
southwestern Qaidam Basin
upper Ganchaigou Formation
sedimentary facies
