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- W1999980069 abstract "The potassium and argon contents of 13 meteorites were measured by the isotopic dilution method. It is proved that the amounts of Ar/sup 36/ and Ar/sup 38/ found are of extra-terrestrial origin, the main source being spallation processes induced by cosmic radiation. In some chondrites an excess of A/sup 36/ compared to Ar/sup 38/ was found. Possible sources for this Ar/sup 36/ are discussed. The 7 chondrites measured give ages between 4.4 x 10/sup 9/ and 4.0 x 10/sup 9/ years. The ages of achondrites vary be4.4 x 10/sup 9/ and 0.7 x 10/sup 9/ years. (auth)" @default.
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- W1999980069 date "1958-01-01" @default.
- W1999980069 modified "2023-10-18" @default.
- W1999980069 title "Argon-Potassium Ages and the Isotopec Composition of Argon from Meteorites." @default.
- W1999980069 doi "https://doi.org/10.1086/146453" @default.
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