陕北佳县石炭-二叠系层序地层研究

Permo-Carboniferous Sequence Stratigraphic Study in Jiaxian Area,Northern Shaanxi

利用钻孔岩心资料,对陕北佳县石炭-二叠纪进行了层序地层学的分析。依据关键界面的层序界面、海侵面、最大海泛面等特征,对沉积环境的演化及相变特征进行分析研究,在石炭-二叠系中划分出了21个四级层序,组合为21个层序组、6个复合层序,并论述了该地区石炭-二叠系层序的特征。

Based on borehole core data carried out sequence stratigraphic analysis for Permo-Carboniferous in the Jiaxian area,northern Shaanxi.According to features of key interfaces including sequence interface,transgressive surface,and maximum flooding surface etc.,carried out analytic study of sedimentary environment evolution and facies variation features.On this basis subdivided the Permo-Carboniferous in Jiaxian area into 21 fourth-order sequences,grouped into 21 sequence groups and 6 composite sequences,then expounded Permo-Carboniferous sequence features in the area.