Detailed analysis and modeling of regional gravity and magnetic data from the Stuart Shelf around the Olympic Dam iron oxide copper-gold (IOCG) deposit, constrained by geologic observations obtained from deep drill cores, show that the eastern Gawler craton basement at 1.61 to 1.59 Ga consisted of an Archean core with two sequences of successively younger supracrustal rocks stepping out eastward from it. These were overprinted by the tectonothermal Hiltaba event. Forward models of potential-field data show no convincing evidence for the presence of widespread mafic rocks or extensional basin systems developed immediately prior to, or during, IOCG mineralization. The high intrusive level and sill-like geometry of Hiltaba Suite plutons emplaced immediately prior to IOCG mineralization is difficult to explain in terms of a genetic association with a dominantly extensional tectonic setting. Instead, the tectonic setting inferred from the basement architecture during mineralization is one of low-strain shortening, consistent with regional field observations. A case can be made for intrusion of the Hiltaba Suite in localized accommodation zones in an overall orogenic setting. This style of low-strain shortening (<10%) is consistent with maximum rates and volumes of fluid flow in the upper crust, and access of these fluids to a variety of basement rock types to buffer metal-scavenging fluids. This fluid-driving mechanism does not necessitate a role for regional mafic magmatism and volcanism in the formation of IOCG deposits. Modeling of regional gravity and magnetic data is generally applicable to exploration for IOCG systems, and other mineral systems, in covered terranes that have distinctive geophysical signatures resulting from fluid-wall-rock redox geochemical reactions.

Map produced for the Australian Federal Police showing the logged positions of Vessel Immacolata on the 30th September and 1st October 2007 on a background on AUS808 and AUS809 and the Cable Protection Zone.

National Geochemical Survey of Australia field training for the geoscience agencies of all States and the Northern Territory took place during 2007 and early 2008. The knowledge transfer mechanisms comprise a detailed National Geochemical Survey of Australia: Field Manual (GA Record 2007/08), this training presentation and several days of in-field sample collection under the guidance of NGSA staff.

The presentation covers the following: - a brief review of GA's Onshore Energy Security Program - U systems and national projects - regional projects and the geophysical acquisition program - input into GA's plans for precompetitive data acquisition

The presentation covers the following: - uranium occurrences widely distributed but Major Deposits are localised in specific zones/fields - > 90% of U resources confined to one field - need to go beyond the components (source, pathway, trap) of mineral system to explain the distribution of U endowment; hence the presentation will: - focus on the Architecture of the system - to delineate important regional constraints.

Presented to the Association of Mining and Exploration Companies (AMEC), Perth, March 2007

Direct dating of ore minerals: A feasibility study of the Pb-Pb isotope step-leaching technique

Pb-Pb step leaching PhD Abstract

Melbourne Geelong LiDAR 2007

Tunkillia Deposit Scale Modelling: Predictive Targeting Outcomes predictive mineral discovery CRC -PIRSA 2- Minotaur Numerical Modelling Project -Update #2