鄂尔多斯盆地中南部早中侏罗世沉积层序充填动力学作用过程

为了研究鄂尔多斯盆地侏罗纪早中期的沉积特征，运用基准面旋回分析原理和方法，剖析了该盆地早中侏罗世不同级次基准面旋回划分，建立了鄂尔多斯盆地富县组-延安组高分辨率层序地层格架，共识别出了4个长期和10个中期基准面旋回。针对盆地沉积相发育特点，讨论了河流体系和三角洲体系的层序充填动力学作用过程，进一步指出了基准面旋回叠加式样在盆地内不同相带的分布规律；同时，结合高分辨率层序划分，揭示了该盆地的沉积充填演化史。

SEQUENCE FILLING DYNAMIC PROCESS OF EARLY-MIDDLE JURASSIC IN CENTRAL-SOUTH ORDOS BASIN

In order to undesstand the sedimentary features of the Ordos Basin in Early-Middle Jurassic, the principles and methodologies of base-level cycle analysis are used to study in detail the Early-Middle Jurassic base-level cycles of different orders in this basin. A high resolution sequence stratigraphic framework is established for the Fuxian Formation-Yan'an Formation in the Ordos Basin, and 4 long-term and 10 medium-term base-level cycles are identified. In view of the characteristics of sedimentary facies in this basin, this paper discusses the sequence filling dynamic processes of fluvial and delta depositional systems, presents the distribution pattern of base-level cycle superimposition styles in different facies belts, and studies the evolutionary history of sedimentary filling in combination with high resolution sequence division.