南华北石炭-二叠系陆表海层序古地理演化

通过对野外露头和钻孔的沉积相、古生物以及准层序堆叠方式的对比分析，将南华北石炭—二叠系陆表海沉积划分为三个三级层序:Sq1～Sq3。以层序和最大海泛面为绘图单元，分别对各层序进行了古地理重建。研究发现Sq1时期海侵范围小，时间短，来自东北方向；Sq2时期海侵范围达到最大，海侵方向由东北变为东南；Sq3时期延续了Sq2时期的古地理格局，但沉积中心向南迁移，盆地物源均主要来自北方。最后对古地理演化的成因进行了探讨，认为石炭—二叠系陆表海沉积主要受控于该时期全球海平面的变化，Sq1与Sq2之间的海侵转换面为稳定构造环境下的全球突发性海侵、南高北低的盆地基底与北缘稳定的物源共同造成的。

Sequence Paleogeographical Evolution of Epicontinental Deposit of Permo-Carboniferous in Southern North China

Based on the study of sedimentary facies,biostratigraphy and stack patterns of parasequences,epicontinental depoisit of Permo-Carboniferous is divided into 3 sequences in Southern North China,which mean 3 trangressional circles.After that this article reconstructs paleogeography both in sequence and at maximum flood surface.It is found that source area lies in the north,and Sq1 develops a small-scale and short-term transgression,which is from NE.However,transgression in Sq2 reaches the top almost submerging...