Lim, Hoseong, Sanislav, Ioan V., Cocker, Helen A., and Dirks, Paul H.G.M. (2026) Controls on mineral endowment in the Georgetown Inlier, northeastern Australia: implications of tectono-magmatic evolution and magma fertility. International Geology Review. (In Press)

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Abstract

The Georgetown Inlier and adjacent Croydon Province form the easternmost exposure of Proterozoic crust in the North Australian Craton and host diverse mineral systems ranging from the Palaeoproterozoic to the Permian. Despite this long-lived tectono-magmatic history, their overall metal endowment is modest compared with the Mount Isa, Curnamona, and Gawler provinces. This study synthesises geological, geochronological, geochemical, and mineral deposit data to evaluate the controls on mineral endowment. Mineralisation occurred episodically and includes Proterozoic IOCG-style Cu and Pb–Zn–Ag deposits, Mesoproterozoic pegmatite-hosted Li and high-purity silica systems, Siluro–Devonian intrusion-related Au, and Carboniferous–Permian porphyry, epithermal Au–Ag, and reduced Sn–W–Mo–U systems. Early Proterozoic mineralisation was variably overprinted by Mesoproterozoic metamorphism and later modified by Phanerozoic magmatism. Integration of igneous geochemistry with Rhyolite-MELTS modelling indicates that magma fertility was spatially and temporally restricted. Predominantly reduced, peraluminous Proterozoic magmatism, together with relatively thin lithosphere and repeated thermal reworking, limited both the formation and preservation of giant ore deposits. Nevertheless, the region remains prospective for pegmatitic Li–Cs–Ta, high-purity silica, and porphyry Cu–W–Mo–U mineral systems within its tectono-magmatic framework.

Item ID:	93778
Item Type:	Article (Refereed Research - C1)
ISSN:	1938-2839
Copyright Information:	© 2026 Informa UK Limited, trading as Taylor & Francis Group.
Date Deposited:	26 Aug 2026 00:22
FoR Codes:	37 EARTH SCIENCES > 3705 Geology > 370503 Igneous and metamorphic petrology @ 30% 37 EARTH SCIENCES > 3705 Geology > 370508 Resource geoscience @ 70%
SEO Codes:	28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280107 Expanding knowledge in the earth sciences @ 100%
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