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内陆表海含煤盆地的层序地层分析不同于大陆边缘海盆地,尤其像华北晚古生代巨大的内陆表海聚煤盆地,海平面变化具突发性和高频性特点,因此所形成的海陆交替里含煤层序较其他类型盆地成因的层序要薄得多。根据研究区盆地充填特征,海平面变化对沉积体系类型和空间配置的控制,总结出内陆表海盆地层序地层分析的基本思路和方法,即Ⅲ级层序划分与层序内部构成单元划分同步进行,最大海泛面的识别与层序界面、小层序界面以及沉积体系域的识别同步进行等原则。
The sequence stratigraphy analysis of the inland surface coal-bearing basins is different from the continental marginal basin, especially the late Paleozoic huge inland surface coal-bearing basin in North China. The sea level changes are characterized by sudden and high frequency. Therefore, the sea-land alternation The coal-bearing sequence is much thinner than that of other types of basins. According to the filling characteristics of the basin and the control of sea-level changes on sedimentary system types and spatial distribution, the basic train of thought and method of sequence stratigraphy analysis in the inland surface sea basin are summarized, that is, the Ⅲ-level sequence and the internal structure unit are synchronized The identification of the largest sea surface, sequence boundaries, small sequence boundaries and the identification of sedimentary system fields are synchronized.