中文摘要：

由于不存在海（湖）泛面这样的界面，相对于海（湖）相地层而言，陆相河流相准层序的识别变得更加困难。将河流相沉积与湖泊相沉积有机联系，通过河流一湖泊沉积体系沉积基准面的升降变化及沉积物供给速率的综合分析，认为存在多种类型的河湖相准层序，不仅存在向上水变浅的准层序，也存在向上水变深的准层序。用基准面升降旋回分析河湖相准层序具有重大意义，经分析指出河流相准层序是基准面短周期抬升沉积的结果，且下降半旋回有时不发育或遭受剥蚀，仅由基准面上升半旋回组成，重要的是不能简单套用一个完整的河湖相准层序存在上升半旋回和下降半旋回的模式，应当全面和具体分析。

英文摘要：

Because of the lack of the marine （lacustrine） overflow interface, corresponding to the marine （ lacus- trine） -facies strata, the identification of fluvial facies parasequences is more difficulty. By means of the organic integration between the fluvial and lacustrine facies depositions an＇d comprehensive analyses of the base-level chan- ges and rate of sediments of fluvial-lacustrine depositional system, it is considered that there exist many kinds of fluvial and lacustrine facies parasequence i. e. not only the subsequences shallowed upward for the water, but the ones deepened upward. It is greatly significant for the sequence analyses with the help of lifting and droping base- level cycles, and moreover the analyses show that the subsequences are resulted from the cyclic uplift sedimentation of the base level and furthermore are composed of the semicycles of the base-level uplift; it is important that the model with lifting and droping base-level semicycles is cannot simply and mechanically introduced within a complete fluvial and lacustrine facies parasequence; on the contrary, the comprehensive and specific analyses should be con- ducted.