华北石炭—二叠系高分辨率层序地层单元划分及对比

Division and Correlation of North China Permo-Carboniferous Based on High Resolution Sequence Stratigraphy

利用高分辨率层序地层学理论,对华北石炭—二叠系的野外露头、钻孔岩心及测井曲线进行详细分析,将其划分为3个超长周期,6个长周期。据不同的沉积环境中短期旋回的对称性,将短周期分为向上变深的非对称型、向上变浅的非对称型和对称型,同时总结了各中长周期内旋回界面、最大洪泛面、沉积环境变化以及内部短周期旋回对称性、叠加样式特征。最后重点对SLSC1旋回内的各长期旋回由盆地中心向边缘的中期旋回特征进行探讨,发现随盆地中心的南北反转,中期基准旋回呈南北向规律性变化。

Based on high resolution sequence stratigraphic theory, outcrops, drilling cores and logging traces of Permo-Carboniferous were analyzed in detail, and divided into 3 super long-term stratigraphic base-level cycles, and 6 long-term stratigraphic base-level cycles. According to symmetry of short-term cycle in different sedimentary environment, short-term cycle can be subdivided into deepening-upward non-symmetric, shallowing-upward non-symmetric and symmetric three types. At the same time, the paper summarized base-level boundaries, maximum flood surface, environment changes and cycle symmetry and staking pattern of shortterm base-level in middle-term and long-term base-level. Finally the paper discussed middle-term base-level characteristics in each long-term base-level of SLSC1 from depocenter to margin, and concluded that middle-term base-level regularly changed from north to south along with transformation of depocenter.