论文部分内容阅读
大型河控浅水三角洲沉积体系发育于鲁西石炭二叠纪含煤地层的上部，是晚古生代大规模海退时期陆源碎屑物质快速推进的产物。在论述鲁西河控浅水三角洲沉积体系的成因相及其内部构成基础上，将其划分为上三角洲平原和下三角洲平原两大部分，前者在鲁西地区发育最好。研究表明，河控浅水三角洲沉积体系经历了由发育到废期两个完整的演化阶段，废弃阶段为聚煤作用最强，成煤期最好的时期。而且，聚煤作用与沉积体系废弃延续的时间有关，时间越长，泥炭沼泽发育越普遍，聚煤作用越好。
Large-scale river control shallow water delta sedimentary system developed in the Upper Permian Carboniferous strata in Luxi, is the product of rapid advance of terrigenous detrital material during the Late Paleozoic large-scale regression. On the basis of discussing the genetic facies and the internal structure of the sedimentary system in the Luxihe controlled shallow water delta, it is divided into two major parts: the upper delta plain and the lower delta plain. The former is best developed in the Luxi area. The research shows that the river control shallow water delta system experienced two complete evolution stages from development to the expulsion stage, and the abandonment stage was the period where the coal accumulation was the strongest and the coal formation period was the best. Moreover, the effect of coal accumulation is related to the time when the sedimentary system is abandoned. The longer the time, the more widespread the development of peat swamps and the better the effect of coal accumulation.