Isotopic dating of the Chengjiang Fauna-bearing horizon in Central Yunnan Province, China  

作　　者：CHANG Xiangyang CHEN Liangzhong HU Shixue WANG Jianghai ZHU Bingquan 

机构地区：[1]Key Laboratory of Environmental Pollution Control and Isotopic Application of Guuangzhou City. Guangzhou University, Guangzhou 510006, China [2]Guangzhou Institute of Geochemistry Chinese Academy of Sciences, Guangzhou 510640, China [3]Yunnan Institute of Geological Sciences, Kunming 650011. China

出　　处：《Chinese Journal Of Geochemistry》2007年第4期345-349,共5页中国地球化学学报

基　　金：This research project was granted jointly by the National Natural Science Foundation of China(Grant No.40073001);the Key Project(97D0072)of Yunnan Provincial Foundation.

摘　　要：Twenty black shale samples, which are free from the influence of weathering, were collected from the Chengjiang Fauna-bearing horizon, central Yunnan Province, yielding a Pb-Pb isochron age of 534±60 Ma. Although this age is younger than both the Rb-Sr isochron age and 40Ar-39Ar age, it should represent the lower isotopic age limit of the Chengjiang Fauna.Twenty black shale samples, which are free from the influence of weathering, were collected from the Chengjiang Fauna-bearing horizon, central Yunnan Province, yielding a Pb-Pb isochron age of 534±60 Ma. Although this age is younger than both the Rb-Sr isochron age and 40^Ar-39^Ar age, it should represent the lower isotopic age limit of the Chengjiang Fauna.

关 键 词：铅同位素 同位素地质学 地质年代学 测定年龄 

分 类 号：O597[理学—应用物理]