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大型克拉通盆地内发生的海侵可以归为2种类型:第1种是基于均变论思想的发生于类似被动大陆边缘地区的渐进型海侵,第2种是基于突变论的发生于陆表海盆地内的事件型海侵,这2种海侵发生背景、沉积特征等存在很大的差异。经对比分析发现,2种海侵存在3方面较大的差别:①发生背景不同,渐进型海侵主要发育于被动大陆具有明显坡折带处,而事件型海侵发生于大型陆表海盆地;②所形成的煤层在层序地层格架中意义不同,渐进型海侵形成的煤层为海侵过程成煤,具有穿时性,而事件型海侵形成的煤层具有等时性,可全区对比;③所成煤层的泥炭化与煤化原理不同,渐进型海侵过程成煤泥炭化与煤化作用是随着海侵的进行而发生的,而事件型海侵成煤的泥炭化作用是在海侵发生之前,海侵之后则开始煤化作用。
The transgression occurring in the large craton basin can be classified into two types: the first one is a progressive transgression based on the idea of the mean-variation theory that occurs on the edge of a similar passive continental margin, and the second one is based on the catastrophe theory Event-type transgression in the basin shows great differences in the background and sedimentary characteristics of the two transgressions. The comparative analysis shows that there are three major differences in the two types of transgression: ① The different types of transgressive transgressions occur mainly in the passive continental margin, whereas the event transgression occurs in the large continental shelf. ② The formed coal seams have different meanings in the sequence stratigraphic framework. The coal seam formed by the progressive sea transgression is coal during the transgression process, and has the characteristics of crossing time. The coal seam formed by the event type transgression is isochronous, ; ③ The principle of peat and coalification is different from that of the coal seam, the process of gradual sea transgression into coal slime and coalification takes place along with the transgression. The event-type transgression of coal into coal is carried out in the sea Before the invasion, the coalification began after the transgression.