【摘要】 运用层序地层学和古地理恢复有关理论、方法对扬子准地台西缘宝鼎盆地进行了等时地层格架下古地理演化与聚煤作用的研究,认为聚煤作用是剩余可容空间大小和新增可容空间产生速率双重因素综合作用的结果.发现断陷盆地聚煤中心主要位于地形平坦、剩余可容空间和新增可容空间产生速率均适中的三角洲平原环境.在盆地稳定断陷期(SⅢ2),聚煤中心主要位于新增可容空间产生速率相对适中的三角洲平原古地理单元至盆地萎缩断陷期(SⅢ3),聚煤中心向新增可容空间产生速率相对较快的湖泊古地理单元迁移.更多还原

【Abstract】 Principles and methods of sequence stratigraphy and paleogeography reconstruction were used to research the paleogeographical evolution and coal accumulation in an isochronal sequence stratigraphic framework of coal measures in Baoding basin of western Yangtze paraplatform.The coal accumulation is caused by residual accommodation space and the yielding rate of new accommodation,and the center of coal accumulation mainly locate in the delta plain where have a appropriate residual accommodation and a moderate yielding rate of new accommodation.During the steady faulting period(SIII2),the coal accumulation center develop mostly in the delta plain where have a moderate yielding rate of new accommodation,in the atrophic faulting period(SIII3),the coal accumulation center moves to the lake where have a bigger yielding rate of new accommodation.更多还原