西藏申扎地区石炭-二叠纪岩石地层划分之我见

岩石地层单位是根据地层的岩性特征划分的地层单位,组是岩石地层的基本单位.西藏申扎德日昂玛-下拉和昂杰剖面石炭-二叠系发育,该地区石炭、二叠系的岩石地层单位都是在这两个剖面上建立.然而,其中的一些岩石地层单位的建立是根据地层中的化石组合而不是据其岩性特征,不符合多重地层划分的原则.该文对申扎地区石炭-二叠纪岩石地层系统提出了一些见解,并简要讨论了石炭-二叠系界线.

Remarks on the Carboniferous-Permian lithostratigraphic division in the Shenzha area, Tibet, China

The term formation is the basic lithostratic unit which is divided based on the lithological characters. The Carboniferous Permian strata developed well in the Deriangma Xiala section and the Angjie section in Shenzha, Tibet. All the lithostratic units of the Carboniferous and Permian strata in this area were named after them. However, some of them were not defined based on the lithological characters but on the fossil assemblages in the sections, and do not accord with the principle of the multiple stratigraphical classification. And the lithostratic system of the Carboniferous Permian has been a controversial subject for a long time. The lithostratic systems of the Carboniferous Permian in the area are manily remarked by the author in the present paper, and the Carboniferous Permian boundary is discussed briefly.