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本文提出了98个K—Ar法绝对年龄测定的新数据,样品是由中国科学院地质研究所和其他兄弟单位提供的。我们的试验条件大致与以往相同,但部分样品采用内加热法熔样。年龄计算常数仍采用:λ_K=5.57×10~(-11),λ_β=4.72×10~(-10)年~(-1),K~(40)(克/克样品)=1.22×10~(-4)K％。利用同位素铅法验证了集宁地区伟晶岩中云母以K-Ar 法测定的年龄值,并对同一岩石样品中所含云母、长石斑品及全岩分别进行了试验分析,得出其年龄相对偏差的范围。
In this paper, 98 new data of absolute K-Ar dating were proposed. Samples were provided by Institute of Geology, Chinese Academy of Sciences and other fraternal units. Our test conditions are roughly the same as in the past, but some of the samples were internally heated. The age constant is still calculated using λ_K = 5.57 × 10 ~ (-11), λ_β = 4.72 × 10 ~ (-10) ~ (-1), K ~ 40 (g / g sample) = 1.22 × 10 ~ (-4) K%. The age value of mica in pegmatites from Jining area was determined by K-Ar method using isotope lead method. The mica, feldspar samples and whole rock contained in the same rock samples were tested respectively. The results show that The range of relative deviation of age.