石盐的^(36)Cl断代法

METHOD FOR CHLQRINE-36 DATING OF HALITE

讨论了~936)Cl的成因、^(36)Cl断代法的原理及测试方法。自1987年以来,应用该方法测得柴达木盆地尕斯库勒湖和大浪滩湖石盐的沉积年龄,并与^(14)C,^(230)Th和古地磁测年法所测得的年龄数据进行对比,结果均在误差(1δ)范围内相吻合,表明石盐的^(36)Cl断代法是可行的,获得的年龄数据是可靠的。

Chlorine-36 production, principles and experimental method of 36C1 dating are briefly described. The ages of the halite in sediment samples from Gasikule Lake and Dalangtan Lake, as calculated from the 36CI/C1 ratios in the sediment, were generally concordant with those obtained by 140C, 230Th and magnetostratigraphic techniques. This confirms the constancy of the chlorine input ratio over the last million years and implies that 36C1 dating can be used for accurate dating of halite sediments.