摘要
本文以松辽裂谷盆地为例，讨论了层序地层学在陆相湖泊盆地中的应用实例，提出了适用于内陆湖泊盆地的层序地层学的术语和模式。根据大陆裂谷盆地的演化阶段特征，划分为同裂谷沉降超层序和后裂谷沉降超层序，指出两个超层序在形成机制和组份上的差异，并相应建立了两类层序地展模式；根据古湖泊发展过程中出现枯水湖—丰水期—枯水期的周期性演化特点，划分为湖进体系域、湖泛体系域和湖退体系域。
Exemplified by the Songliao Basin,the present paper discusses the application of sequence stratigraphy and suggests the alternative, terminology and models about sequence stratigraphy in continental lacustrine basins.In terms of the characteristics of individual evolutionary stages for the continental rift basins, the sequence stratigraphy may be divided into the synrifting subsidence supersequence and postrifting subsidence supersequence between which there are differences in genetic mechanism and composition,thus resulting in the establishment of two relevant sequence stratigraphic models. Morever, the transgressive systems tract, flooding systems tract and regressive systems tract have been identified on the basis of the periodic evolution of dry season-rainy season-dry season in ancient lakes.
基金
国家教委博士点基金
关键词
超层序
体系域
层序地展模式
大陆裂谷盆地
supersequence
systems tract
sequence stratigraphic model
continental rift basin
