Geochronological constraints on the polymetamorphic evolution of the granulite-hosted Challenger gold deposit: implications for assembly of the northwest Gawler Craton
A temperature-time history for the granulite-hosted Challenger gold deposit in the Christie Domain of the Gawler Craton, South Australia, has been derived using a range of isotopic decay systems including U-Pb, Sm-Nd, Rb-Sr and 40Ar/39Ar. Nd model ages and detrital zircon ages suggest a protolith age of ca 2900 Ma for the Challenger Gneiss. Gold mineralisation was probably introduced under greenschist/amphibolite-facies conditions towards the end of the Archaean, between 2800 and 2550 Ma....[Show more]
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|Source:||Australian Journal of Earth Sciences|
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