Geological age of Chouniukou Formation  

作　　者：沈光隆 吴秀元 李克定 

机构地区：[1]Department of Geology, Northwest University, Xi'an 710069, China [2]Nanjing Institue of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,China [3]Department of Geology,Lanzhou University,Lanzhou 730000,China.

出　　处：《Science China Chemistry》1995年第1期107-115,共9页中国科学（化学英文版）

基　　金：Project supported by the National Natural Science Foundation of China.

摘　　要：Studies demonstrate that the Chouniukou Formation of the Qilian Mountains represents a lithostratigraphical unit across series, with its lower part belonging to the Middle-Late Visean, middle part to E-zone of the Early Namunan, and upper part to the Middle-Late Namurian. The Mid-Carboniferous boundary passes through the bedding plane between the middle and upper parts of this formation.Studies demonstrate that the Chouniukou Formation of the Qilian Mountains represents a lithostratigraphical unit across series, with its lower part belonging to the Middle-Late Visean, middle part to E-zone of the Early Namunan, and upper part to the Middle-Late Namurian. The Mid-Carboniferous boundary passes through the bedding plane between the middle and upper parts of this formation.

关 键 词：Chounjukou FORMATION Middle-Late VISEAN NAMURIAN NORTH QILIAN Mountains. 

分 类 号：P597[天文地球—地球化学]