摘要
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 in the superimposed basin includes two types, the progressive transgression and the event transgression. And, there are many differences between them, such as the background, the characteristics of deposition and so on. And,their differences are typical: firstly, the backgrounds of transgressions are different. The progressive transgression developed in the slope break of the passive continental margin, while the event transgression developed in the continental sea basin. Secondly, the significance of the coal formed in different transgression is different in the sequence stratigraphy. The coal formed by the progressive transgression is called transgression progress forming coal. And, the forming time is diachronism. But the coal formed by theevent transgression is called event transgression forming coal. And, the forming time is isochronism. Finally, the principle of peatforming and anthracolitization is different. The peat forming and coalification of progressive transgression occurs together with the progress of transgression. But, the peat forming occurs before the transgression and anthracolitization begins after the transgression within which the coal is formed by the event transgression.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第2期7-11,29,共6页
Petroleum Geology and Recovery Efficiency
基金
国家自然基金项目"海域区古近纪典型盆地煤聚积模式及转换机制研究"(40872100)
山东省高校沉积成矿作用与沉积矿产重点实验室(山东科技大学)开放基金资助项目"海侵事件与成煤作用耦合关系研究"(DMSM200801)
关键词
克拉通盆地
渐进型海侵
事件型海侵
泥炭化
陆表海盆地
煤化作用
Craton basin
progressive transgression
event transgression
peat forming
continental sea basin
coalification
