湘东南地区震旦纪地层的新划分与区域对比

New Stratigraphic Division and Correlation of Sinian System in Southeastern Hunan

本文采用多重地层划分和构造地层法，研究并重建了湘东南地区震旦系新层序，厘定了泗洲山组、天子地组、正园岭组、埃岐岭组、丁腰河组的含义及其划分、对比标志。认为该浊积碎屑岩系中的两套砾岩，是冰成作用的产物，可与湘中、湘西乃至华南地区的震旦系对比。同时指出孩区有板溪期的沉积，并建立了青白口系大江边组。

This paper rebuilds the stratigraphic sequence of Sinian System in southeastern Hunan in the light of multi-stratigraphic division and tectono-stratigraphic methodology,revises the definition of Sizhoushan,Tianzidi, Zhenyuanling,Aizhiling and Dingyaohe Formations and their indices of division and correlation,The two sets of conglomerates in this turbidite clastic rock series are considered to be glacigenic sediments,which can be correlated to those in central Hunan,western Hunan as well as south China。In addition,it is proved that sediments of Banxi age exist in this area,and accordingly,Dajiangbian Fomation of Qinbaikou System is estab-lished.