Gawler Project web mapping system

Central Olympic Cu-Au Province - Geophysical Interpretation of Basement Geology.

This web mapping system is part of the Gawler Mineral Promotion Project.

The central Olympic Cu-Au province, of the eastern Gawler Craton, lies beneath the sedimentary sequences of the Stuart Shelf. Basement comprises Late Archaean metamorphics, and the Proterozoic Donington Suite, Hutchison Group, Wallaroo Group, Hiltaba Suite granitoids and mafic intrusives, and the Gawler Range Volcanics. The region is host to extensive iron oxide-copper-gold mineralisation, most famously, the giant Olympic Dam deposit containing 32 million tonnes of copper.

Except for parts of the Gawler Range Volcanics, none of the basement crops out and is covered by sequences generally varying in thickness from 100 m to 1500 m. Interpretation of units and structures was done using gravity and airborne magnetic data. Some geological calibration was done by checking exploration drill logs or by examining drill core, where these were available. If possible, petrophysical properties were measured and used to constrain the interpretation.

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