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以层序地层学理论为指导 ,系统研究了江陵浅水—半深水坳陷湖盆的层序地层学特征。研究表明 :区域不整合界面和沉积转换界面是 级层序的主要界面 ;层序内虽均发育低位、湖侵和高位体系域 ,但各体系域发育程度是不同的 ,致使层序的旋回性以非对称为主 ;层序内各体系域的沉积相构成均以河流三角洲和浅水湖泊为主 ,而冲积扇、扇三角洲不发育 ,湖泊水体基本没有发生过明显的扩张、收缩 ,湖平面的波动没有造成沉积相带的区域性变化 ,在此基础上 ,建立了江陵浅水—半深水坳陷湖盆特有的两种层序地层充填模式。
Guided by the theory of sequence stratigraphy, the sequence stratigraphic characteristics of the Jiangling shallow-semi-deepwater lacustrine basin have been studied systematically. The results show that the regional unconformity interface and sedimentary transformation interface are the main interfaces of the sequence stratigraphy. Although both lowstands, lakeshore and upper system tract develop in the sequence, the development degree of each system tract is different, resulting in the cyclicality of the sequence The sedimentary facies of every system tract in the sequence is mainly composed of river delta and shallow lake, while the alluvial fan and fan delta are not developed. There is basically no significant expansion and contraction of lake water body, On the basis of this, the two filling modes of sequence stratigraphy peculiar to the Jiangling shallow - semi - deepwater depression were established.