High- resolution Coal- bearing Sequence of Late Paleozoic Strata in Datong Region, North Shanxi
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摘要: 本文介绍了以基准面升降为驱动机制的高分辨率层序地层学的理论和方法。此方法是在沉积相分析的基础上，通过沉积体积划分和相分异反演出可容纳空间的单向迁移方向、地层叠置样式、基准面升降及界面位置，进而划分出不同级次的基准面旋回（即层序），并由长期旋回到短期旋回逐级进行对比。此后，作者用该法对以陆相沉积为主的山西大同晚古生代煤系进行详细划分对比，澄清了过去某些模糊认识，探讨了聚煤作用与高分辨率层序的关系。研究结果表明，该方法能极大地提高地层划分与对比精度，是陆相层序地层研究的有效方法。此外本方法在储层对比和储层预测方面也是十分有用的。Abstract: The paper introduces the theory and method of high一resolution sequence stratigraphy based on thecontrol of baselevel rise and fall. On the basis of fades analysis the method is used to deduce a single di-rection of accommodation migration, stacking patterns of strata, baselevel rise，and f all and s u dace to ca-tion of sequences by volumetric partition of sediment and facies differentiation, and to divide various or-ders of baselevel cycles(i. e. sequences) and to correlate thecycles order by order from long一termcyclesto short- term ones. After that, the authors apply the method for detail division and correlation of LatePaleo zoic coal-bearing series mainly composed of continental sediments in the Datong region，NorthShanxi, and clarify some vague conclusions and searches for the relationship between coal accumulationand high一resolution sequence. The result of the study indicates that the method can be widely used toimprove the precision of division and correlation of strata, and that it is an effective way to research intocontinental sequence stratigraphy. In addition, this approa his also very useful in correlation and predica-ti on of res erv airs.
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