The pmd*CRC's Mineral Systems approach Barnicoat CRC science framework

Interpretation of apatite fission track and vitrinite reflectance data for samples from nine petroleum exploration wells in the eastern part of the Bowen and Gunnedah basins, eastern Australia, indicates that peak palaeotemperatures were reached during the Early Cretaceous, through progressive exposure to higher temperatures due to increased depth of burial. The palaeotemperatures were 28-58oC higher than at present. Cooling from the peak temperatures took place in the mid-Cretaceous, at some time during the interval 100-80 Ma, with the greatest amount of cooling occurring in the northern part of the study area. Palaeogeothermal gradients were generally in the range 21-35oC/km, similar to present day geothermal gradients in the region. The estimated maximum amount of denudation in the study area is approximately 1.9 km, with a significant portion of the eroded succession being Jurassic to Early Cretaceous in age. The synchronicity between the times of cooling inferred from all the sampled wells, regardless of their location with respect to the fault system near the present eastern margin of the Bowen Basin, suggests that the uplift was widespread, rather than being localised by faults during the mid-Cretaceous. This can be correlated with uplift along much of the eastern margin of Gondwanaland at the sme time, including all of eastern Australia, in New Zealand and in Marie Byrd Land, Antarctica. The onset of this mid-Cretaceous regional cooling and denudation coincided with a period of continental extension after the cessation of volcanism and subduction at about 95 Ma, and prior to the initiation of sea-floor spreading at about 84 Ma and formation of the current passive margin.

3D Technical Workshop 2008

Tropical Cyclone (TC) Tracy impacted Darwin early on Christmas Day, 1974. The magnitude of damage was such that Tracy remains deeply ingrained in the Australian psyche. Several factors contributed to the widespread damage, including the intensity of the cyclone and construction materials employed in Darwin at the time. Since 1974, the population of Darwin has grown rapidly, from 46,000 in 1974 to nearly 115,000 in 2006. If TC Tracy were to strike Darwin in 2008, the impacts could be catastrophic. We perform a validation of Geoscience Australia's Tropical Cyclone Risk Model (TCRM) to assess the impacts TC Tracy would have on the 1974 landscape of Darwin, and compare the impacts to those determined from a post-impact survey. We then apply TCRM to the present-day landscape of Darwin to determine the damage incurred if a cyclone identical to TC Tracy impacted the city in 2008. In validating TCRM against the 1974 impact, we find an underestimate of the damage at 36% of replacement cost (RC), compared the survey estimate of 50-60% RC. Some of this deficit can be accounted for through the effects of large debris. Qualitatively, TCRM can spatially replicate the damage inflicted on Darwin by the small cyclone. The northern suburbs suffer the greatest damage, in line with the historical observations. For the 2008 scenario, TCRM indicates a nearly 90% reduction in the overall loss (% RC) over the Darwin region. Once again, the spatial nature of the damage is captured well, with the greatest damage incurred close to the eye of the cyclone. Areas that have been developed since 1974 such as Palmerston suffer very little damage due to the small extent of the severe winds. The northern suburbs, rebuilt in the years following TC Tracy, are much more resilient, largely due to the influence of very high building standards put in place between 1975 and 1980.

I7 Project Mineral System Analysis of the Mt Isa - McArthur region

The Geothermal Tenements of Australia dataset was developed by combining state geothermal tenement datasets downloaded from online mapping applications. Geothermal tenements are only available for Queensland, New South Wales, South Australia, Victoria and Tasmania. Western Australia has recently released 495 geothermal acreage blocks for exploration with Northern Territory in process of developing a Geothermal Energy Bill. The dataset is constantly being maintained, updated and enhanced on an ongoing basis. Sources are listed in descending order of reliability. www.pir.sa.gov.au/geothermal www.dme.qld.gov.au www.dse.vic.gov.au www.mrt.tas.gov.au Geothermal Company websites

This record contains the substantive results of Geoscience Australia marine survey SS08/2005 to the SW margin of Australia. The survey was completed between 28 September and 20 October 2005 using Australia’s national facility research vessel Southern Surveyor. The survey included scientists from Geoscience Australia, CSIRO – Marine and Atmospheric Research, and Victoria Museum. The survey was co‐funded by Geoscience Australia and the Department of the Environment and Heritage (now the Department of the Environment, Water, Heritage and the Arts). The principal aims of the survey were to explore deep‐sea habitats and processes in submarine canyons on the SW margin, and examine the geology of the underlying Mentelle Basin as an assessment for its petroleum potential.

Structural controls on mineralisation at the Wyoming Gold Deposits, NSW: Inferences from deformation - fluid-flow numerical models

J. Hodge et al The structural, hydrothermal alteration and fluid evolution of the New Celebration lode-gold deposits: multiple deformation events and stages of gold mineralization.

QLD LiDAR dataset. Metadata acquired by GA as part of the National DEM Project. Licence conditions not supplied.