Offshore hydrocarbon reservoirs can experience oil and gas seepage through the seafloor and water column, resulting in tell-tale slicks on the sea surface. Detecting and identifying these intermittent and often remote slicks can contribute to directing exploration resources in both producing and frontier basins. Remote sensing, the acquisition of image data from sensors mounted on airborne or spaceborne platforms, is seen as a potential tool for detecting, mapping and identifying these seepage-derived slicks. Simply put, it offers a cost-effective means of scanning extensive and/or remote regions, on an ongoing basis.

The response to emergency situations such as floods and fires demand products in short time frames. If you use remote sensing then the response typically involves detailed examination of imagery in order to determine the spectral bands, ratios and associated thresholds that map the desired features such as flood or burn extent. The trial and error process associated with manual threshold selection is often time consuming and can result in significant errors due to confounding factors such as clouds and shadowed areas. By modelling features such as flood waters or fire scars as Gaussian distributions, allowing for fuzzy thresholds with neighbouring features, the required thresholds can be automatically derived from the imagery and emergency events can have extents determined much more rapidly. Automatic threshold selection minimises trial and error, thereby dramatically reducing processing turn-around time.

This dataset contains the 2010 Offshore Petroleum Acreage Release Areas. The regular release of offshore acreage is a key part of the Australian Government's strategy to encourage investment in petroleum exploration. The 2010 release consits of 31 areas in 5 sedimentary basins.

250K Topographic map 2010 Edition3

The aim of this document is to * outline the information management process for inundation modelling projects using ANUGA * outline the general process adopted by Geoscience Australia in modelling inundation using ANUGA * allow a future user to understand (a) how the input and output data has been stored (b) how the input data has been checked and/or manipulated before use (c) how the model has been checked for appropriateness

Beginning in the Archean, the continent of Australia evolved to its present configuration through the accretion and assembly of several smaller continental blocks and terranes at its margins. Australia usually grew by convergent plate margin processes, such as arc-continent collision, continent-continent collision or through accretionary processes at subduction zones. The accretion of several island arcs to the Australian continent, through arc-continent collisions, played an important role in this process, and the geodynamic implications of some Archean and Proterozoic island arcs recognised in Australia will be discussed here.

Displays the coverage of publicly available digital aeromagnetic data. The map legend is coloured according to the line spacing of the survey with broader line spacings (lower resolution surveys) displayed in shades of blue. Closer line spacings (higher resolution surveys are displayed in red, purple and coral.

Increases in natural disasters worldwide are presenting new challenges for natural hazard risk research. Natural disasters are more likely than ever to have global impact in a world where catastrophic risk is shared across national and international boundaries and between the public and private sector. Climate change is the popular scapegoat for the increase in disasters; but exponential growth in human population and assets as well as increased exposure of populations in coastal areas and megacities are equally to blame. Interest in natural hazard risk is widespread among the public, in all levels of government, in international relations and across the private sector. This presentation explores how these issues and interests are manifest in the evolution of natural hazards risk research, including the role of geoscientists in this process. 30 years ago, natural hazard research was narrowly confined to the development of hazard maps, which were used primarily for input to building codes and the design of major infrastructure or critical facilities. Today, solutions require multi-hazard information and the development of a wide range of analyses about the exposure and vulnerability of communities. Further, it is not enough to just quantify the problem; results also require solutions in the form of options for mitigating the risk. These new demands require inter-disciplinary teams of hazard scientists, engineers, economists, social scientists, mathematicians, geographers and more. The development of solutions also requires the involvement of a wider range of stakeholders and clients in order to ensure that products are fit for purpose. The drivers for better natural hazard risk information are now evident in Australia in the form of significant new national policies. The new National Security policy issued in 2008 recognises that natural hazards can pose catastrophic risk for Australia. In 2009, the Australian Agency for International Development issued a Disaster Reduction Policy as a foundation of its capacity building programs overseas; natural hazards are a key element of this policy, which has resulted in significant investments in natural hazard risk research in the region. Geoscientists have a major role to play in meeting the demand for information on natural disasters and in assessing natural hazard risk. First of all, there is greater demand for information to describe the processes that lead to natural hazard events. This includes better understanding of the causes and probabilities of these events, as well as descriptions of events in a physical and spatial context. Hazard or risk models based solely on statistical methods are no longer sufficient. Natural hazard science is moving to physically-based models which are driven by an understanding of Earth dynamics, with increased computing power and improved simulation tools critical to this evolution. In terms of climate change hazards, there is an increasing demand for earth scientists to contribute to our understanding of the potential increases in coastal erosion, storm surge, riverine flooding, and sea-level rise, all of which require fundamental geological and geophysical input.

Understanding marine biodiversity has received much attention from an ecological and conservation management perspective. For this purpose, scientific marine surveys are necessary and often conducted by a multidisciplinary team. In particular, the data collected can come from multiple sources inheriting a particular aspect of each discipline that requires reasonable integration for the purpose of modelling biodiversity. This talk gives an overview of some strategies investigated in the Marine Biodiversity Research Hub project funded by the Commonwealth Environment Research Facilities Program to reconcile these differences.

U-PB-HF-O CHARACTER OF NEOARCHAEAN BASEMENT TO THE PINE CREEK OROGEN, NORTH AUSTRALIAN CRATON