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40Ar/39 Ar dating of pyrite

✍ Scribed by York, Derek; Masliwec, A.; Kuybida, P.; Hanes, J. A.; Hall, C. M.; Kenyon, W. John; Spooner, E. T. C.; Scott, S. D.

Book ID
109728040
Publisher
Nature Publishing Group
Year
1982
Tongue
English
Weight
214 KB
Volume
300
Category
Article
ISSN
0028-0836

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## HISTORICAL DEVELOPMENT AND BASIC PRINCIPLES The K-Ar method is based on the quantitative accumulation of the isotope 40 Ar\* ('\*' denotes radiogenic) generated by the radioactive decay of naturally occurring 40 K (about 0.01% of all potassium, and having a half-life of 1.250 billion years 1,2