盐阜坳陷淮阴凹陷上白垩统浦口组沉积构造

对盐阜坳陷淮阴凹陷上白垩统浦口组发育的沉积相类型及其特征进行了分析。认为淮阴凹陷浦口组和盐阜坳陷有不同的沉积构造特征, 特别是本区发育的厚度达千米的盐岩沉积, 更有其特殊性。通过该区构造、古生物、钻井、测井、地震、盐岩化学及湖盆内沉积体系等特征的研究, 认为淮阴凹陷浦口组二段和三段的沉积构造有其特殊性,巨厚的盐岩层是壳深部盐类物质沿深大断裂上涌以热卤水形式进入湖盆的结果。

Sedimentary Structures of Pukou Formation of Upper Cretaceous in Huaiyin Sag, Yanfu Depression

The types and characteristics of the sedimentary facies developed in Pukou formation of Upper Cretaceous in Huaiyin sag of Yanfu depression are analyzed.It is considered that the sedimentary structures of Pukou formation in Huaiyin sag are different from those in Yanfu depression,and the new characteristics of salt rocks of over 1000 m thickness appear in this area.From studies of these characteristcs of structures,palaeontology,drilling,well logging,seismic profile,salt chemistry and lacustrine sedimentary system,it is recognized that the new characteristics occur in structures of section Pukou II and III in Huaiyin sag,and the huge thickness of salt rocks is formed by the crust salt materials upwelling along deep fracture in the form of hot bittern and entering lacustrine basin in this area.