鄂尔多斯盆地南缘晚古生代层序地层分析

Analysis of Sequence Stratigraphy of Late Paleozoic in the Southern Fringe of the Erdos Basin

应用层序地层学理论和方法,通过对大量钻井和测井资料的整理分析,进行了鄂尔多斯盆地南缘晚古生代地层层序划分。研究区太原组和山西组可划分出5个三级层序。在陆表海盆地的3个层序中,每个层序由海侵体系域和高水位体系域组成,缺失低水位体系域。而在河流—三角洲充填序列中,可划分出低水位、水进和高水位体系域。

On the basis of the methods and theory of the sequence stratigraphy, and having summarized and analyzed the data of cores and logging, the paper has conducted the sequence division of the strata of the Late Paleozoic in the southern fringe of the Erdos Basin. Five sequences of third rank have been distinguished in Taiyuan and Shanxi formations in the study area. In the three sequences of the epicontinental basin, each sequence is composed of the transgressive systems tracts and the highstand systems tracts, and the lowstand systems are missing. While in the filling sequences dominated by the river-delta, the lowstand systems tracts, the water-transgressive systems tracts, and the highstand systems tracts have been divided.