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40Ar/39Ar Dating: Principles, Techniques, and Applications in Orogenic Terranes

  • R. D. Dallmeyer

Abstract

The 40 Ar/39Ar dating technique is a recently developed analytical variation of the conventional K-Ar method. It has greatly enhanced the general applicability of K-Argeochronology because it has the ability to distinguish between: (1) samples which have lost a component of radiogenic argon since their initial crystallization, (2) samples which have remained closed systems with respect to potassium and argon since their initial crystallization, and, (3) samples which contain a component of extraneous argon of non-atmospheric 40 Ar/39 Ar ratio. In principle this potential has not yet been fully realized. However, basic systematics of the technique are still in the developmental stages and initial results are encouraging.

Keywords

Blue Ridge Radiogenic Argon Release Spectrum Argon Loss Retrograde Alteration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer-Verlag Berlin Heidelberg 1979

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  • R. D. Dallmeyer

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