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本文探讨了层序界面及其附近的地质特征及其构型,建立了三型(Ⅰ,Ⅱ,Ⅲ型)八类层序界面分类方案;Ⅰ型界面包括暴露侵蚀削截面、古土壤面、古喀斯特面和暴露侵蚀界面;Ⅱ型界面包括海平面下降结构转换面和海侵上超界面;Ⅲ型界面包括海底侵蚀成岩间断面和事件界面。运用岩石地层学、生物地层学、磁性地层学及碳氧同位素等多学科,对二叠纪和三叠纪中,二叠与前二叠系之间、二叠与三叠系之间和中下三叠统之间3个主要层序界面进行了探讨,这3个界面分别属于Ⅰ型、Ⅲ型和Ⅰ型界面。提出了层序界面及其附近的地质特征及其地质过程的表现。
In this paper, we discuss the geological characteristics and the configuration of the sequence boundary and its vicinity, and establish the classification scheme of three type (Ⅰ, Ⅱ and Ⅲ) sequence interfaces. The type I interface includes the exposed erosion cross section, paleosol surface, The ancient karst surface and the exposed erosion interface; the type II interface includes the sea level descending structure transformation surface and the transgressive over-interface; the type III interface includes the sub-sea erosion diagenetic section and the event interface. Using lithostratigraphy, bio-stratigraphy, magnetic stratigraphy and carbon and oxygen isotopes and other disciplines, the Permian and Triassic, Permian and Pre-Permian, Permian and Triassic and between The three major sequence boundaries between the Lower Triassic are discussed, which belong to the type Ⅰ, type Ⅲ and type Ⅰ interfaces, respectively. The sequence features and their geological features and their geological processes are presented.