安徽省华北型石炭—二叠纪地层多重划分与对比

North China Typed Permo-Carboniferous Strata Multiple Division and Correlation in Anhui Province

安徽省华北型石炭—二叠纪地层的划分与对比一直存在着不同的观点。在《中国地层指南及中国地层指南说明书》(2001)思想框架下,采用多重地层分类原则,对区内岩石地层、生物地层、年代地层和层序地层进行划分对比研究。岩石地层可划分为本溪组、太原组、山西组、下石盒子组、上石盒子组和孙家沟组,其中山西组和上石盒子组为主要含煤地层;在生物地层方面,建立2个组合带和5个植物组合带;区内石炭纪地层仅发育上石炭统,二叠纪地层齐全;区内石炭二叠系含煤地层划分为6个三级层序。通过多重地层划分与对比,突出了不同地层单位的属性特征,优化了区域等时地层格架,有助于煤炭资源的预测与评价。

The stratigraphic division and correlation of Anhui Province North China typed Permo-Carboniferous strata exist different opinions at all times.Under the idea framework of the ＂Stratigraphic Guide of China and Its Explanation＂（2001）,using multiple stratigraphic classification principle,carried out lithostraigraphic,biostratigraphic,chronostratigraphic and sequence stratigraphic subdivisions and correlation study in the area.The lithostratigraphic units can be subdivided into Benxi,Taiyuan,Shanxi,Xiashihezi,Shangshihezi and Sunjiagou formations,in which,the Shanxi Formation and Shangshihezi Formation are main coal-bearing strata;on biostratigraphic subdivision,2 fusulinid assemblage zones and 5 floral zones established;only Upper Series of Carboniferous System has been developed in the area,while Permian System is complete;Permo-Carboniferous coal-bearing strata can be subdivided into 6 third-order sequences.Through multiple strata subdivisions and correlation,different stratigraphic unit attribute characteristics have been popped out;regional isochronous stratigraphic framework optimized,thus made a contribution to coal resource prediction and assessment.