The age of nephrite occurrences in the great serpentine belt of New South Wales
- 1 May 1976
- journal article
- research article
- Published by Taylor & Francis in Journal of the Geological Society of Australia
- Vol. 23 (1) , 15-17
- https://doi.org/10.1080/00167617608728918
Abstract
K‐Ar age measurements using the 40Ar/39Ar total fusion technique on nephrite from two occurrences in the Great Serpentine Belt southeast of Tamworth yielded ages of 273 ± 5.8 and 280 ± 5.6 m.y. The K‐Ar ages indicate that tectonic emplacement, during which the nephrite was produced as a reaction product between ultra‐mafic rock and country rock, occurred early in the Permian about 275–280 m.y. ago.Keywords
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