【摘要】 根据《国际地层表(2004)》C/P界线的划分方案,兴蒙—吉黑造山带一些已知剖面C/P界线附近的竹蜓化石带与我国西南地区的一些典型剖面具有可比性。代表性剖面有吉林省永吉黄榆剖面、吉林省双阳光屁股山剖面、内蒙西乌旗米韩高巧高鲁剖面,这些剖面在C/P界线附近岩石地层学普遍为单一的碳酸岩相。生物地层学表现为以竹蜓P.uddeni带或P.borealis带的代表性分子或其主要成员覆盖在Triticites带之上,与贵州罗甸、紫云场、云南安乐、广西宜山等知名剖面均具有一定的相似性。因此,可将P.uddeni带底界作为本区C/P界线。更多还原

【Abstract】 According to the international stratigraphic chart of 2004,the Fusulinid fossil zones close to the boundary of Carboniferous and Permian in some known sections in the Xing’an-Mongolia and Jilin-Heilongjiang orogenic belt can correlate to the typical sections in Southwest China.There are three typical Carboniferous and Permian boundary sections in the region.They are Huangyu section in Yongji,Jilin Province,Guangpigushan section in Shuangyang,Jilin Province,and Mihangaoqiaogaolu section in Xiwuqi,Inner Mongolia.All these three sections develop carbonate facies at the boundary of Carbonife-rous and Permian.The Fusulinid zone,represented by Pseudoschwagerina uddeni or Pseudoschwagerina borealis overlies Triticites zone in the region.The feature is the similar to sections in Luodian and Ziyunchang in Guizhou Province,and Yishan section in Guangxi Province.So the authors consi-der that the bottom of Pseudoschwagerina uddeni zone to be the boundary of Carboniferous and Permian.更多还原