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Abstract
EPMA chemical U-Th-Pb uraninite analysis has been used to constrain the age of the granite-related, Rössing South uranium prospect in Namibia and the Kintyre unconformity-related uranium deposit in Western Australia. Uraninite from the Rössing South prospect has an age of 496.1 ± 4.1 Ma, which is similar to the age of other uranium deposits in the region at Rössing and Goanikontes. Uraninite grains analysed from the Kintyre deposit have an age of 837 +35/-31 Ma suggesting that the uranium mineralisation occurred during or after the latest period of sedimentation in the Yeneena Basin during the ca 850 to ca 800 Ma Miles Orogeny.
Acknowledgements
The authors are grateful to Doug Collier and Chris Hilliard for carrying out mineral separations and support for this work. Cameco Corporation is thanked for access to uraninite separates from the Kintyre deposit and Extract Resources for granting access to uraninite from the Rössing South prospect. U6897 uraninite standard was kindly supplied by Bill Davis (Geological Survey of Canada). Daniel McIlroy and Theo Chiotis provided drafting support for and . We are also grateful for the helpful reviews of this article by Sebastien Meffre and an anonymous reviewer.