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Dow在1977年提出的利用上下构造层镜质体反射率(Ro)差值来估算不整合面地层剥蚀厚度的方法,在国内仍有广泛的应用。本文使用镜质体反射率法,首次系统地恢复了渤海湾盆地惠民凹陷沙四段地层剥蚀厚度。沙四段地层剥蚀量介于100~400m,平均剥蚀量为250 m,最大剥蚀区在鲁西隆起西北侧的斜坡边缘,最大剥蚀量近600m,但范围较小,在凸起区则只有较小的剥蚀厚度。
Dow in 1977 proposed the use of the upper and lower structural layer vitrinite reflectance (Ro) difference to estimate the thickness of unconsolidated strata denudation method is still widely used in China. In this paper, we use the vitrinite reflectance method to systematically restore the denudation thickness of the Es4 Member of the Huimin Depression in the Bohai Bay Basin for the first time. The amount of denudation in the fourth member of Shahejie Formation ranges from 100 m to 400 m with an average of 250 m. The largest denuded zone is located on the northwestern slope of the Luxi Uplift. The maximum denudation is about 600 m, but the range is small. Small eroded thickness.