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地层层序是古海平面变化的信息记录载体 ,有效容纳空间 (C(t) )是地层层序的堆积场所 ,是海平面变化 (L(t) )、构造沉降 (Y(t) )和地质时间 (t)的函数 .通过对上扬子地台西缘二叠—三叠系层序地层学研究 ,在总结前人海平面变化曲线研究方法的基础上 ,建立了海平面变化曲线的数学模型 (数学地质模型和数学函数模型 ) ,即首先创立海平面变化曲线的数学地质模型 :C(t) =L(t) +Y(t) ,进而提出了海平面变化曲线的数学函数模型 .运用该模型定量编制了上扬子地台西缘二叠—三叠纪海平面变化曲线 .
The stratigraphic sequence is the carrier of information record of the change of the paleo-sea level. The effective accommodation space (C (t)) is the accumulation place of the stratigraphic sequence, which is the change of sea level (L (t)), structural subsidence Time (t) .According to the research of Permian-Triassic sequence stratigraphy in the upper margin of the platform, this paper builds up the mathematic model of sea level curve (Mathematical Geological Model and Mathematical Function Model), that is to say, the mathematical geologic model of the sea level curve is first established: C (t) = L (t) + Y (t) The model quantifies the Permian-Triassic sea level curve on the western margin of the Upper Yangtze platform.