抚顺盆地同沉积构造及其对煤和油页岩厚度的控制

THE SYNSEDIMENTARY STRUCTURE FRAMEWORK AND ITS CONTROLS ON THE THICKNESS OF EXTRA THICK COAL BED & OIL THALE,FUSHUN BASIN,CHINA

采用定性分析与定量分析相结合的方法，研究了抚顺盆地的同沉积构造格架及其对超厚煤层和油页岩的控制作用。结果表明，抚顺断陷盆地的同沉积构造格架，是由走向ＮＥＥ和ＮＮＷ的两组同沉积正断层组成的网络。它将盆地分划成一系列走向近东西的次级断陷、断隆。在古气候和碎屑沉积速率等因素的配合下，该盆地的同沉积构造格架通过控制沉积环境和沉积空间，从间接和直接两个方面严格地控制了煤层和油页岩的厚度分布，因此超厚煤层和油页岩整体呈东西条带状分布，并且在次级断陷中显著加厚，而在次级断隆上显著减薄。

In this article,the combinative method of qualitative and quantitative analyses is adopted to study the synsedimentary structure framework and its controls on the thickness of extra thick coal bed & oil shale.It demonstrated that the synsedimentary structure framework of Fushun fault basin is a network.This network consists of two groups of different strike synsedimentary normal faults,known as NEE and NNW.It divides the basin into a series of sub subsidence & sub upheaval.By the co operation of ancient climate,clastic sediment rate and some other factors,the synsedimentary structure framework of this Basin strictly controls the accumulative thickness distribution of coal bed & oil shale both directly and indirectly,through controlling the sediment environment and sediment space.Therefore,the whole body of extra thick coal bed & oil shale is distributed as a band through the east west direction,thickening obviously in the sub subsidence and then obviously thinking in the sub upheaval.