湖北兴山大峡口二叠系剖面沉积相分析

在大量前人研究的基础上,通过野外实测,运用沉积相分析方法,结合露头层序地层学、生物地层学、储层成岩作用等方面研究,初步对湖北兴山大峡口二叠系剖面进行了沉积相分析研究,认为该剖面由下至上可划分为两个沉积体系单元,即碳酸盐缓坡沉积体系(相)和碳酸盐台地沉积体系(相)。同时,初步总结出了该剖面的沉积相模式。海平面的升降变化是控制该区沉积相发育和分布的主要因素。

Analysis on sedimentary facies of Permian section in Daxiakou outcrop, Xingshan County, Hubei Province

Based on numerous researches,a conceptual analysis on sedimentary facies of Permian section in Daxiakou outcrop,Xingshan county is made.After a lot of field-survey,sedimentary facies of Daxikou Permian section was analyzed combining sedimentary facies analysis method with outcrop sequence stratigraphy,biostratigraphy,and reservoir diagenesis.It is considered that the Daxiakou Permian section could be divided into two depositional system units:carbonate ramp deposited in the lower part and carbonate platform deposited in the upper part.Meanwhile,the sedimentary facies models of the section were summarized in this paper.It's concluded that sea level eustacy is the main factor controlling the development and distribution of sedimentary facies in this region.