本文以贵州紫云上二叠统碳酸盐台地边缘礁剖面为例,运用宇宙化学的概念,讨论了化学层序地层学研究中一个至关重要的问题,即各种间断面缺失时间的估算,由此而提出一系列有关化学层序地层理论的新概念,包括时间凝缩面、时间间断面、相对压实因子和时间缺失因子等。最后还恢复了具线性时标的紫云地区晚二叠世相对海平面变化定量曲线。 Taking the Permian carbonate platform margin reef profile in Ziyun, Ziyun, Guizhou as an example, this paper uses the concept of cosmochemistry to discuss a crucial issue in the study of chemical sequence stratigraphy, namely, estimation of missing time of various discontinuities , A series of new concepts about the theory of chemical sequence stratigraphy are put forward, including time condensation surface, time section, relative compaction factor and time missing factor. Finally, a quantitative curve of Late Permian relative sea-level change in the Ziyun area with linear time scales was also restored.