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通过层序地层学分析，汤原断陷下第三系可划分出４个三级层序。由于这些层序在形成时经历了拉张裂陷、快速沉降、挤压回返等不同的构造阶段，因此层序发育特征各有特点。在拉张背景下形成的简单裂陷层序发育巨厚的粗碎屑低位沉积体系域；在快速沉降背景下形成的层序发育下细上粗的湖泊收缩体系域；而在挤压回返背景下形成的简单坳陷层序规模较小，湖泊相不发育。在断裂活动和基底沉降共同作用下形成的快速坳断层序和快速断坳层序都能形成良好的生储盖组合，但快速坳断层序的生储盖组合更好。关键词汤原断陷构造活动层序地层层序类型第一作者简介杨玉峰男３４岁工程师（博士生）沉积学层序地层学起源于被动大陆边缘盆地和近海盆地的地层沉积研究，其基本观点为地层层序的几何形态及岩性特征主要受构造沉降、沉积物供给、海平面升降以及气候四个因素的控制［１］。陆相盆地层序的形成同样也受到上述因素的影响，只不过各因素作用的程度与海相盆地有一定的区别。在陆相盆地中，构造运动对盆地充填序列的控制是第一位重要因素［２］。构造活动（包括基底沉降和断裂活动）对陆相湖盆可容纳空间和地层展布的控制作用比海相盆地更明显。构造作用控制下的可容纳空间决定了层序发育的规模、速度和空间的几何结构?
Through the sequence stratigraphy analysis, Tertiary fault series can be divided into four third-order sequences. Because these strata underwent different stages of tectonic development, such as extensional rifting, rapid subsidence, and compression and return, these sequences have their own characteristics. In the simple rift sequence formed under the tensioned background, thick coarse crust low sedimentary system tract develops; the lacustrine shrinkage system tract developed under the rapid sedimentary background sequence is fine and coarse; in contrast, Simple sequence of depression formed under the smaller scale, the lake phase is not developed. Both the rapid depressive sequence and rapid sequence depressive sequence formed under the joint action of the fault activity and the basement subsidence can form a good reservoir-cap assemblage, but the reservoir-cap combination of the rapid depressive fault sequence is better. Key words Tangyuan faulted tectonic activity sequence stratigraphic sequence type first author Yang Yufeng Male 34-year-old engineer (PhD) Sedimentology Sequence stratigraphy originated from the study of formation deposition in the passive continental marginal basin and offshore basin. The basic The view is that the stratigraphic sequence and lithology are mainly controlled by structural subsidence, sediment supply, sea level rise and fall, and climate [1]. The formation of terrestrial basins is also affected by the above factors, but the extent of the role of each factor and the marine basin have a certain difference. In terrestrial basins, tectonic movement of basin fill sequence control is the first important factor [2]. The tectonic activities (including basement subsidence and fault activity) have more obvious control over the accommodation space and stratigraphic distribution of continental lacustrine basin than the marine basin. The accommodation space under tectono-control determines the scale, velocity and spatial geometry of sequence development.