内蒙古韩家营玄武岩夹层中三趾马动物群化石

王倩, 刘艳, 王李花, 傅明楷, 张兆群

An Upper Miocene “Hipparion fauna” locality sandwiched by basalt in Hanjiaying, Nei Mongol

WANG Qian, LIU Yan, WANG Li-Hua, Mikael FORTELIUS, ZHANG Zhao-Qun

Table 1 K-Ar isotopic dating data of the basalt from the Hanjiaying fossil locality in Jining District

Sample number K (%) Sample weight (mg) 40Ar (10-11mol/g) 38Ar (10-14mol) 40Ar/38Ar 38Ar/36Ar Age (Ma) HJY-01 1.60 31.40 2.014 8.087 11.22 86.31 7.24±0.19 HJY-02 1.11 33.50 1.322 8.095 8.661 92.14 6.85±0.21