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从随机动力系统角度,在厘米级的岩性变化尺度上,定量分析了鄂东二叠系大隆组顶部和三叠系大冶组底部的沉积行为及动力学特征.多种统计学方法研究表明:二叠系大隆组顶部的沉积过程为稳定的Markov过程,地层相关性弱,岩性变化处于随机状态;三叠系大冶组底部的沉积过程为非稳定的Markov过程,地层相关性渐强,岩性变化处于有序状态.在沉积旋回的跃迁方式上,前者表现为混沌,后者则具有周期特征.两者的沉积过程虽连续,动力学性质却截然不同.故古-中生代之交的这一沉积界线也是一个动力学意义上的突变界线,是地质环境经连续变化达到临界状态后发生突变的一种沉积响应.
From the perspective of stochastic dynamical system, the sedimentary behavior and dynamics at the top of the Permian Dalong Formation and the bottom of the Daye Formation in the Triassic are quantitatively analyzed on a centimeter scale of lithology variation.Many statistical methods The results show that the sedimentary process at the top of the Permian Dalong Formation is a stable Markov process with weak stratigraphic correlation and random lithological changes. The sedimentary process at the bottom of the Daye Formation in the Triassic is an unstable Markov process. The stratigraphic correlation In the sedimentary cycle, the former is chaotic, while the latter is periodic in nature.The sedimentary processes of the two are continuous and their dynamics are quite different, so the paleo-Mesozoic This deposit boundary is also a dynamic boundary of abrupt change. It is a sedimentary response that the geological environment changes suddenly after it reaches the critical state.