山西晚古生代层序地层低水位期沉积特征探讨

华北陆表海层序地层有无中低水位期沉积,学术界观点不一。通过对华北(主要是山西境内)晚古生代含煤沉积建造特征与北美精典层序地层特征进行分析对比,认为山西晚古生代含煤沉积建造中存在中低水位期沉积。待征表现为:在北部近陆源区的一套巨厚砾石、含砾粗砂沉积,向南变为一套含砾粗砂岩、粗砂岩的河流相沉积,最南部变为三角洲相和泻湖—堡岛相含煤沉积。

Probe into Sedimentary Feature of Late Paleozoic Sequence Strata During Lower Water Level Period in Shanxi Province

In the sequence strata of epicontinental sea of Northern China whether or not exist sediments of mid- lower water lever period, there are different viewpoints. Through analyses and correlation on features of Late Paleozoic coal- bearing sedimentary formation in Northern China (mainly in Shanxi) and classical sequence strata of Northern America consider that there are sediments of mid- lower water level period in Late Paleozoic coal- bearing sedimentary formation of Shanxi province. It's showing that a set deposit of huge thick gravel? gravelly coarse sand near by continental source region in the north part, changed into a set river deposit of gravelly coarse sandstone? coarse sandstone towards the south, and further changed into coal- bearing deposits of delta and lagoon- barrier island facies towards the most south part.