A wide-angle reflection seismic survey coincident with a regional transect through Northeastern Yilgarn Craton focused on the Leonora-Laverton Tectonic Zone, Western Australia, was carried out to supplement deep seismic reflection studies. The major objectives were: to collect high-density refraction information for offsets of up to 60 km; to carry out a comparative study of near-vertical and wide-angle seismic images of the crust in the study area; to obtain velocity information for the upper crust. The survey deployed 120 short period recorders with a 500 m spacing. Acquisition parameters used for the wide-angle reflection experiment were selected so that it would to fit into the schedule and technology of the conventional reflection survey. The same vibrations were recorded in both surveys simultaneously. The major challenge in processing the wide-angle data was to manage the huge volume of information. The processing sequence included sorting into receiver and source gathers, cross-correlation with reference sweeps and stacking original seismic traces to form single source point traces, producing seismograms from individual traces and finally creating seismic record sections from separate seismograms. High amplitude seismic signal from vibroseis sources was recorded at least up to 50 km offsets in the first arrivals, and later arrivals were observed down to 12 s next to sources. A preliminary upper crustal model developed from the wide-angle data shows that the thickness of a high velocity layer, corresponding to the greenstone rocks, is 4.0-4.5 km. The boundary separating this layer from a low velocity layer below it is possibly a compositional boundary between greenstones and underlying felsic gneisses. There is no evidence for high velocity material below this boundary. Assuming the Moho belongs to deepest reflections modelled, total crustal thickness in the region can be speculatively estimated in the range 32-37 km.

Under the Community Stream Sampling and Salinity Mapping Project, the Australian Government through the Department of Agriculture, Fisheries and Forestry and the Department of Environment and Heritage, acting through Bureau of Rural Sciences, funded an airborne electromagnetic (AEM) survey to provide information in relation to land use questions in selected areas along the River Murray Corridor (RMC). The proposed study areas and major land use issues were identified by the RMC Reference Group at its inception meeting on 26th July, 2006. This report has been prepared to facilitate recommendations on the Barr Creek - Gunbower study area. The work was developed in consultation with the RMC Technical Working Group (TWG) to provide a basis for the RMC Reference Group and other stake holders to understand the value and application of AEM data to the study area. This understanding, combined with the Reference Groups assessment of the final results and taking in account policy and land management issues, will enable the Reference Group to make recommendations to the Australian Government.

As part of its Energy Security Initiative, the Australian Government allocated Geoscience Australia $59 million in August 2006, to undertake a five-year Onshore Energy Security Program. This is designed to deliver precompetitive geoscience data and scientifically-based assessments to reduce the rick in exploration for onshore energy resources, including petroleum, uranium, thorium and geothermal energy. The work is being conducted in collaboration with the State and territory geological surveys and is scheduled for completion in June 2011.

The National Geochemical Survey of Australia project represents an essential component of the Australian Government's Onshore Energy Security Initiative. The national geochemical survey involves the use of field-tested methods for collection and analysis of transported regolith samples representative of catchments covering most of Australia. The project is a collaboration between Geoscience Australia and State and Northern Territory geoscience agencies, which will provide an internally consistent geochemical dataset useful for calibration and ground-truthing of airborne radiometrics surveys. The survey also will help to fill gaps in current airborne radiometrics and geochemical coverages of Australia, provide multi-element characterisation and ranking of radiometric anomalies and aid in first-order investigation of the nature of geothermal hot-spots. As a result it will support and add value to numerous other Onshore Energy Security Initiative projects and have wider applications in mineral exploration and in environmental assessment and management. This report details the methodology underpinning the determination of the theoretical sampling points using terrain and hydrological analysis; and the protocols for sample collection. It will be used for knowledge transfer during training sessions for the State and Northern Territory field parties who also will receive field equipment and consumables which will ensure there is consistent sampling throughout the project. A digital data entry template has been designed to enable efficient and consistent in-field data capture, which also will streamline data entry into Geoscience Australia's corporate databases.

The record is a presentation given by Adrian Fisher to staff of the Aditya-Birla Nifty copper mine and to staff at the Geological Survey of Western Australia, August 2007. It describes the planning behind the Paterson AEM survey, to be acquired in 2007-2008.

Under the Community Stream Sampling and Salinity Mapping Project, the Australian Government through the Department of Agriculture, Fisheries and Forestry and the Department of Environment and Heritage, acting through Bureau of Rural Sciences, funded an airborne electromagnetic (AEM) survey to provide information in relation to land use questions in selected areas along the River Murray Corridor (RMC). The proposed study areas and major land use issues were identified by the RMC Reference Group at its inception meeting on 26th July, 2006. This report has been prepared to facilitate recommendations on the Lindsay-Wallpolla study area. The work was developed in consultation with the RMC Technical Working Group (TWG) to provide a basis for the RMC Reference Group and other stake holders to understand the value and application of AEM data to the study area. This understanding, combined with the Reference Group's assessment of the final results and taking in account policy and land management issues, will enable the Reference Group to make recommendations to the Australian Government.

The Natural Fields EM Forum was held in Brisbane, Queensland, Australia, on February 26, 2012, in conjunction with the ASEG 22nd International Geophysical Conference & Exhibition 2012. The forum was organised to review the current state of development of natural field EM methods (NFEM), being those methods that utilise the ambient electromagnetic field rather than deploying an additional active source as an element of a survey. NFEM methods are used to acquire data from which various parameters can be obtained to help interpret the electrical characteristics of the subsurface.

The Frome Airborne Electromagnetic (AEM) Survey was designed to deliver reliable precompetitive AEM data and scientific analysis to aid research into the potential of energy and mineral resources in the Lake Frome region of South Australia. The Survey was the third regional AEM survey conducted within the Onshore Energy Security Program (OESP) at Geoscience Australia (GA), following the Paterson and Pine Creek AEM surveys. The Survey was flown by Fugro Airborne Surveys (FAS) for Geoscience Australia between 22 May and 2 November 2010, using the TEMPEST^TM time-domain electromagnetic (TEM) system. Survey lines were flown east-west at a nominal 100m above ground level, and spaced 2.5km or 5km apart. A total of 32 317 line km of new data were collected over an area of 95 450km2, approximately one tenth of the area of South Australia. The survey area extends from the South Australia-New South Wales border at Cameron Corner across to the Marree and Leigh Creek areas, skirts the highland of the northern Flinders Ranges, and includes the entire Lake Frome area, the Olary Spur between the towns of Yunta and Cockburn and the northwestern Murray-Darling Basin. The Lake Frome region contains a large number of sandstone-hosted uranium deposits with known resources of ~60 000 tonnes of U3O8, constituting ~45% of uranium resources of this type in Australia. The Survey was conducted with the aims of reducing exploration risk, stimulating exploration investment and enhancing prospectivity within the region primarily for uranium, but also for other commodities including copper, gold, silver, lead, zinc, iron ore, coal and groundwater. The Frome AEM Survey was designed to be a regional mapping program for imaging surface and subsurface geological features that may be associated with sandstone-hosted uranium systems. Interpretations of the Frome AEM Survey data provide a regional overview of the under-cover geology of the entire survey area, as well as providing detailed along-line information to give users a greater understanding of previous detailed investigations within small areas. The data have mapped features of fertile sandstone-uranium systems and have highlighted many new areas of prospectivity for uranium and other commodities.

There is increasing demand from policy makers for high levels of certainty before committing to decisions on water security infrastructure. This demand for higher certainty in groundwater model predictions has provided an impetus for new hydrogeological research directions. This has included a renewed impetus in the search for technologies and methods to aid rapid groundwater resource assessment. Critical measurements used to parameterise groundwater models include effective porosity and hydraulic conductivity measurements. Typically, values for effective porosity are derived by lithological comparisons with published data, and measurements of hydraulic conductivity acquired by limited constant head pumping tests or slug tests. Look-up tables are used for deriving effective porosity as a surrogate for expensive and time consuming laboratory measurements of cores that may be biased by sampling, and the difficulty of making measurements on unconsolidated materials. However, pump tests are costly and time-consuming, with environmental permissions for disposal of produced waters increasingly difficult to obtain. Nuclear Magnetic Resonance (NMR) can provide a direct measurement of the presence of water in the pore space of aquifer materials. The detection is possible due to the nuclear magnetization of the hydrogen (protons) in the water. The NMR measurement is the basis of MRI (magnetic resonance imaging) in medical applications, and geophysical logging applications within consolidated sediments for the petroleum industry. In the Darling River floodplain, NMR data were acquired in 26 boreholes in a 4-week period. Effective porosity values were derived directly from the NMR data, and hydraulic conductivity values were calculated using empirical relationships calibrated and verified with limited laboratory permeameter and field aquifer tests.

Airborne Geophysical Data acquired as part of the Gawler Mineral Promotion Project. Includes point located TEMPEST electromagnetics, magnetics and elevation data. This is a one line transect, hence no grids or images.