| 摘要: |
| 盆地的地层格架(stratigraphic framework)是盆地分析最基本、最重要的参数之一(李思田等,1983),它是指沉积盆地的外部和内部几何形态以及组成盆地的层的堆积性质。概括地说,地层格架不仅指盆地的固体几何形态和盆地所包含的地层单元或单元序列的固体几何形态,而且涉及到单个地层单元的性质,最终体现了沉积环境(Conybeare,1979)。 |
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| A Discussion on the Stratigraphic Framework of Sedimentary Basins |
| Ma Weijun |
| (Department of Geology, Xiangtan College of Mining, Hunan) |
| Abstract: |
| In great demand of exploring and perfecting the theories and methods of basin analysis,the author,in this paper, tries to discuss in detail the stratigraphic Tramework of sedimentary basins on the basis of the study of some examples abroad. The stratigraphic framework of sedimentary basin is one of the most important and basic parameters which may be measured by the external and internal geometrical shapes and accumulational features of the beds in the basins. The internal geometrical shapes of the basins depend on solid geometrical shapes of the stratigraphic units and unit sequences. The different types of units are commonly of distinct analytical significances. The accumulational features of the beds are bound to be related to sedimentary environments. The study of the stratigraphic framework of sedimentary basins mainly includes the determination of depositional events and episodes. The key to the interpretation is how to distinguish time-stratigraphic units. The functions and importance of the stratigraphic framework are classified into six aspects,i, e. the establishment of the chronostratigraphic charts for the evolution of the basins; the establishment of the regional charts for the cycles of relative changes of sea levels or palaeotectonic cycles which may be used in the regional or global stratigraphic correlation, etc.. |
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