This map is part of a series which comprises 50 maps which covers the whole of Australia at a scale of 1:1 000 000 (1cm on a map represents 10km on the ground). Each standard map covers an area of 6 degrees longitude by 4 degrees latitude or about 590 kilometres east to west and about 440 kilometres from north to south. These maps depict natural and constructed features including transport infrastructure (roads, railway airports), hydrography, contours, hypsometric and bathymetric layers, localities and some administrative boundaries, making this a useful general reference map.

Assessment of climate change impacts on groundwater in East Timor

The world's first continental-scale Advanced Spaceborne Thermal Emissions and Reflectance Radiometer (ASTER) mosaic, and related mineral group maps for Australia, are being released at the 34th International Geological Congress. These products have 30 m pixel resolution across the continent and can be used to identify, map and characterise near-surface materials that are spatially and chemically associated with various types of ore deposits. For example, the ASTER maps show that the 200 km length of colluvial fans shedding eastward from the Northern Flinders Ranges comprise different mineralogical characteristics, presumably reflecting their provenance. Furthermore, the most eastward margins of these fans show patterns interpreted as being related to differences in the chemistry of the groundwaters migrating into the Lake Frome drainage system. Key ASTER products include the Opaque Index map which highlights reduced environments and, consequently, redox relationships; and the AlOH Group Composition map which indicates areas that are dominated by neutral-alkaline illitic/ smectitic soils in contrast to those comprising kaolinitic soils which form in more neutral-acid conditions. These mineral maps thus have the potential to assist exploration for uranium (mapping oxidised groundwater) and geothermal energy (tracing viable U-bearing source rocks/fluids and the associated active plumbing network).

Hydrogeology of East Timor

Since the Indonesian islands of Sumatra and Java lie adjacent to an active subduction zone and include some of the world's most densely populated areas, the reduction of potential earthquake fatalities through improved building codes and seismic hazard assessments is a high priority. One of the most critical parts of an earthquake hazard assessment is a quantitative description of the level of ground motion generated by an earthquake, also known as Ground Motion Prediction Equations (GMPEs).

Development of python-FALL3D: a modified procedure for modelling volcanic ash dispersal in the Asia-Pacific region

This job is part of the town capture program

This job is part of the town capture program

The southwest margin is a complex and relatively poorly studied part of Australia's offshore continental region and includes the Southern Carnarvon, Perth and Mentelle basins, as well as the Naturaliste and Wallaby plateaus. A series of seismic profiles are interpreted, in conjunction with potential field data, to reassess the nature of the continent-ocean boundary (COB) across the region. Results highlight how the structural architecture of the margin varies significantly along strike according to the following criteria: a) the relative orientation of the margin with respect to the initial extension direction, b) the nature and extent of break-up related magmatism and c) the nature and width of the continent-ocean transition zone. Margin segmentation is directly linked to the location of major oceanic fracture zones as well as to the location and geometry of the major Palaeozoic to Mesozoic basins. Furthermore, the correlation between margin segmentation and structural trends of underlying Proterozoic Pinjarra Orogen suggests some basement control on margin evolution. The revised COB interpretation is combined with recent Indian Ocean plate reconstructions incorporating potential field data from the abyssal plains of west Australia and east Antarctica, including the Early Cretaceous southwest Australian margin. Comparisons between this model and recent basin scale sequence stratigraphic studies across the region provide new insights into Mesozoic basin evolution, including the relative timing of break-up within each basin. In addition, the model illustrates the possible impacts of Valanginian to Aptian transform margin development on the tectonic and thermal evolution of the northern Perth Basin depocentres.

After CO2 is injected into the saline aquifer, the formation water inside the porous media becomes more acidic. This will significantly affect the original chemical equilibrium underground, and induce or speed up various processes of dissolution and precipitation depending on the reservoir pressure, temperature and salinity of formation water. The Early Cretaceous Gage Sandstone has been identified as a potential reservoir unit suitable for large-scale CO2 storage in the offshore southern Perth Basin. This study assesses the contribution of mineralisation trapping to CO2 storage capacity of the Gage Sandstone through a comprehensive geochemical modelling.