论文部分内容阅读
通过右江盆地二叠系层序地层研究表明,在海平面升降旋回的各个时期,均有重力流的发育,并显示各自特征的层序内部构型和成因格架。低水位期以盆缘-下斜坡混屑浊积岩为特征,陆棚边缘体系域中重力流相对较少;海侵期重力流以钙屑碎屑流及其再改造砂沉积为主;高水位期重力流沉积厚度大、分布广、成因类型丰富,主要以钙屑塌积岩、颗粒流、液化沉积物流、碎屑流及浊流大量发育为特征。
Through the research of Permian sequence stratigraphy in the Youjiang Basin, it is shown that there are all the development of gravity flow in each period of sea level ascending and descending cyclization, and the sequence internal structure and genesis frame of each feature are displayed. The low water level period is characterized by the basin margin-lower slope mixed turbidite, while the gravity flow in the marginal system tract of the shelf is relatively small. The gravity flow in the transgression period is dominated by the flux of calcareous debris and its remodeled sediments, The gravity flow sediments in the water level are large in thickness, widely distributed and rich in genetic types. They are mainly characterized by calcareous sedimentary rock, particle flow, liquefied sediment flow, debris flow and turbidity flow.