济阳坳陷早中侏罗世沉积特征与沉积模式

对济阳坳陷早中侏罗世大量的岩心、测井等资料进行了综合研究。结果表明,研究区早中侏罗世主要发育的沉积相类型是：（1）纵向上呈粒度向上变细的河流相；（2）具有较高成分成熟度和结构成熟度的多种层理类型发育的三角洲相；（3）具有低成分成熟度和结构成熟度的杂乱堆积的扇三角洲相；（4）杂色泥岩和生物钻孔发育的滨浅湖亚相；（5）黑色泥岩及大量植物化石发育的湖湾亚相；（6）多层薄煤层发育的沼泽相。受北西向断层的控制，这一时期研究区为一相互分割的山间盆地，湖盆范围时大时小，湖水深度不断变化，总体来说湖水较浅，主要发育滨浅湖亚相。

Sedimentary Characteristics and Model of Early-Middle Jurassic in Jiyang Depression

In order to determine sedimentary characteristics and model of the Early-Middle Jurassic in Jiyang depression, the authors studied sedimentary features, core section, well logging of the EarlyMiddle Jurassic in Jiyang depression. There are many sedimentary facies in Early-Middle Jurassic of study area, such as river facies with fining upward cycle, delta facies with higher maturity of debris composition and texture , fan delta facies with lower maturity of debris composition and texture, coastal and shallow lacustrine subfacies with dominanttly mottle mudstone and biogliph, lake bay subfacies with dominanttly black mudstone and plant remains and swamp facies with dominanttly thin coal layers. The results indicate that Early-Middle Jurassic Jiyang depression was composed of several isolated basins, which were controlled and divided up by north-west faults. Lake levels of these isolated basins were instable, but on the whole, coastal and shallow lake is in the mojority.