高分辨率层序地层学方法在沉积前古地貌恢复中的应用

古地形地貌是控制盆地内沉积相发育与分布的主导因素，是沉积学研究的基础内容之一。高分辨层序地层是学从基准面旋回变化和可容性纳空间变化原理为基础，揭示基准面旋回层序与沉积动力学和地层响应过程的关系。应用高分辨率层序地层学方法进行地层对比能使地层对比等时性更强，精度更高，进而能更好地反映原始古地貌特征，高分辨率层序地层学方法恢复古地貌是建立在沉积相分析基础上，其技术关键是对比参照面的选择，文章详细讨论了单一沉积体系和多种沉积体系组合沉积前古地貌恢复的基本方法和步骤，并提出了在实际操作中应注意的问题。

THE POSSIBILITY OF REBUILDING PALEOGEOMORPHOLOGY BEFORE BASIN DEPOSITION BY HIGH-RESOLUTION SEQUENCE STRATIGRAPHY

Paleogeomorphology is the main factor to control the late deposition in a basin. High resolution sequence stratigraphy is to research the relationship between base level cycle sedimentary strata sequence and basin deposition kinetics based upon the theory of the changing of base level cycle and accommodation. It can improve the isochroneity and accuracy during strata contrasting. According the theory, it is possible to rebuilding basin paleogeomorphology before deposition by high resolution sequence stratigraphy. The way of rebuilding the original geomorphology in one basin by high resolution sequence stratigraphy is founded on the sedimentary facies analysis, taking the largest trasgression as the reference level, and utilizing high resolution sequence strata contrasting to complete original paleogeomorphology. The paper details the method and procedure of rebuilding pleogeomorphology of a single sedimentary system and complex system and points out the attention problem.