松辽盆地层序地层学研究新认识

geochemistry of the Permian sedimentary rocks in the Lower Yangtze area

作者在全面了解陆相层序地层学研究现状的基础上，认为陆相层序及体系域发育仍受控于湖平面相对变化。构造、气候及沉积物供给的控制作用最终通过湖平面变化表现出来。而湖平面变化可分完整旋回与不完整旋回两种情况，进而提出了所形成的层序及体系域模式：在完整旋回中形成了湖泊充填、湖泊扩张、湖泛和湖泊萎缩四个体系域，对应层序为Ⅰ型层序；在不完整旋回中形成了湖泊充填、湖泊扩张、湖泛三个体系域，或者湖泊扩张、湖泛、湖泊萎缩三个体系域，对应层序为Ⅱ型层序。以松辽盆地西部斜坡实际工作为例，提出了中生代层序及体系域划分方案，较前人研究有新认识。

Recent progress has been achieved on the Mesozoic sequence stratigraphy of the Songliao Basin in northeastern China. The authors have proposed that the development of the continental sequences and systems tracts are governed by relative lake-level changes. The controls of structures,climates and sediment supply are often expressed by lake-level changes,which,in turn,may be grouped into complete and incomplete cycles resulting in the models for the sequences and systems tracts. They are the lacustrine filling systems tract (FST),lacustrine expansion systems tract (EST),lacustrine inundating systems tract (IST) and lacustrine contraction systems tract (CST) and corresponding type Ⅰ sequence in the complete cycles of lakes,and the lacustrine filling systems tract (FST),lacustrine expansion systems tract (EST),lacustrine inundating systems tract (IST)and lacustrine contraction systems tract (CST) and corresponding type Ⅱ sequence in the incomplete cycles of lakes.