重庆市合川区炭坝剖面须家河组沉积相分析  

Sedimentary Facies Analysis of Xujiahe Formation in Tanba Section of Hechuan District, Chongqing City

作　　者：何树兴 石学斌 谭梅 HE Shuxing;SHI Xuebin;TAN Mei(Chongqing Natural History Museum,Chongqing 400700,China)

机构地区：[1]重庆自然博物馆,重庆400700

出　　处：《中国资源综合利用》2024年第6期58-63,共6页China Resources Comprehensive Utilization

摘　　要：重庆市合川区炭坝剖面的须家河组发育完整,层序清楚,是进行沉积相研究的理想剖面。在总结前人成果的基础上,对合川炭坝剖面须家河组进行实地调查,通过分析炭坝剖面的沉积构造情况、沉积序列情况、生物组合情况及岩石学特征情况等,总结出合川炭坝剖面须家河组的沉积相类型。将重庆市合川区炭坝剖面须家河组划分为辫状河三角洲相和湖泊相,包括辫状河三角洲前缘亚相、浅湖亚相和半深湖亚相,并可细分为河口沙坝微相、浅湖泥微相、浅湖沙坝微相、水下分流河道微相及分流河道间微相等。The Xujiahe formation of the Tanba section in Hechuan district,Chongqing city is well developed and has clear sequence,which is an ideal section for studying sedimentary facies.Based on the summary of previous study,this paper conducts field investigation and research on the Xujiahe formation of the Tanba section in Hechuan.By analyzing the sedimentary structure,sedimentary sequence,petrological characteristics and biological assemblages of the section,this paper summarizes the sedimentary facies types of the Xujiahe formation in the Tanba section.The sedimentary facies types can be divided into lake facies and braided river delta facies,including braided delta front sub-facies,shallow lake subfacies and semi-deep lake sub-facies.Furthermore,they can be subdivided into five microfacies,including river mouth sandbar,shallow lake mud,shallow lake sand bar,underwater distributary channel and interdistributary channel.

关 键 词：炭坝剖面 须家河组 沉积相 

分 类 号：TQ426[化学工程]