Potassium argon dating of gamma-irradiated minerals |
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| Authors: | JG Mitchell |
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| Institution: | Department of Geophysics and Planetary Physics, University of Newcastle upon Tyne,England |
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| Abstract: | A method for measuring potassium-argon ages making use of the reaction39K(λ, n)38Kβ+→38Ar to indirectly determine potassium is discussed. In principle, it is closely analogous to the40Ar/39Ar dating method and should possess all of the attributes of that technique. It is demonstrated that precise dating of mica samples with ages between 15 my and 1000 my can be carried out, and a discussion of potentially interfering reactions suggests that it may be possible to extend the method to the problem of induced argon isotopic dating of calcium-rich minerals. |
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