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标准层序是指同时包含高位体系域HST、湖侵体系域TST、下降体系域FSST和低位体系域LST的三级层序。通过对标准三级层序各类体系域中上超特征的分析,将一个标准层序的上超点分为5大类,即LST上超点、TST上超点、早期HST上超点、晚期HST上超点和FSST上超点,提出了通过统计层序内各类上超点来反演湖平面变化史的方法。利用这种方法,结合渤海湾盆地辽中凹陷渐新统地层剖面特征,在划分三级层序的基础上,统计上超点并绘制岸线迁移和湖平面升降幅度曲线,并将渐新世划分为4个湖平面升降旋回,对比钻遇沉积物的纵向变化特征,认为湖平变化曲线可信度很高,同时也证实了上超点方法反演湖平面变化在陆相古湖泊学研究中的可行性。
The standard sequence is the third-order sequence that contains both HST, TST, FSST and LST. Based on the analysis of the upper-supercharacteristics in all kinds of system domains of the standard third-order sequence, the upper super-points of a standard sequence are divided into five categories: super-point on LST, super-point on TST, super-point on early HST, Late HST over the super-point and FSST over the point, proposed by the statistical sequence of various types of super-point inversion method to retrieve the history of the lake level. Based on the characteristics of the Oligocene stratigraphic profile of the Liaozhong Sag in the Bohai Bay Basin, based on the classification of the third-order sequences, a statistical super-point and the curve of shoreline migration and elevation of the lake are plotted and the Oligocene Divided into four lake plane ascending and descending cycle, compared with the vertical drilling characteristics of the changes in the sediment, that the lake level curve of high confidence, but also confirmed that the super-point method to retrieve the lake level changes in continental paleoclimate research In the feasibility.