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Dating deformation using crushed alkali feldspar: 40 Ar/ 39 Ar geochronology of shear zones in the Wyangala Batholith, NSW, Australia

Forster, Margaret; Lister, Gordon; Lennox, P G


Diffusion parameters have been estimated for K-feldspar in and adjacent to mylonite shear zones in the Wyangala Batholith. The parameters obtained suggest that deformation during mylonitisation would have caused argon systematics to reset because diffusion distances were reduced by cataclasis, deformation and/or recrystallisation. However, the mineral lattice remained sufficiently retentive to allow subsequently produced radiogenic argon to be retained. 40Ar/39Ar geochronology is thus able to...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
Source: Australian Journal of Earth Sciences
DOI: 10.1080/08120099.2014.916751


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