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40Ar/39Ar — Alter eines Basits der Ostantarktis


The40Ar/39Ar technique is an analytical variation of the K−Ar dating method. A known fraction of the39K in a sample is converted to39Ar by irradiation with fast neutrons. In an incremental heating experiment, the argon is released from the sample fractionally by stepwise heating. The result is a series of apparent ages.40Ar/39Ar age spectrum was determined for the sample Oase Vestfold. The minimum of the saddle-shaped age spectrum gives 1.0 billion years.

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Kaiser, G., Loos, G. 40Ar/39Ar — Alter eines Basits der Ostantarktis. Journal of Radioanalytical and Nuclear Chemistry, Articles 83, 129–133 (1984).

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