The Mount Isa Inlier and Environs Mineral Deposit Database describes 251 of the most significant mineral deposits in the Mount Isa Inlier and environs, out of a total of more than 1800 locations listed in the Australian Geological Survey Organisation (AGSO) mineral occurrence database, 'MINLOC'. The database comprises five commodity-based tables, grouped as follows: copper-gold-silver (187 locations), lead-zinc-silver (22), gold (15), uranium (12) and miscellaneous (including silver, cobalt, tungsten, tin, manganese, iron and beryl; 15 locations). Each of the mineral deposits described either has combined production and reserves equivalent in value to more than 20 tonnes of copper metal, or is a significant prospect typical of a particular deposit type. Mineral deposits described in the database are presented on a 1:500 000 scale metallogenic map of the Mount Isa Inlier and Environs, which is available separately.

No abstract available

These data represent whole rock geochemical analyses from the OZCHEM Database. Each analysis includes a geographic location and a geological description, which includes the host stratigraphic unit, where known, and the lithology. Most samples have been collected by Geoscience Australia field parties. These data are a snapshot at the "Ending Date" of the current database entries and are also a subset of the full database managed by GA which includes data from Papua NewGuinea, Antarctica, Solomon Islands and New Zealand.

The main objective of this study is to test the impact of the alignment of solutions for regional GPS networks to the ITRF when applying an inappropriate procedure which is adopted fairly frequently in practice. The progression of ITRF versions is overviewed then, using the analysis of two regional GPS campaigns as case studies, the coordinate differences caused by applying the inappropriate procedure for reference frame alignment are presented. The results of the comparative studies show that coordinate differences in the order of a few millimetres to some centimetres can be caused by using inconsistent reference frames for the reference station coordinates and the IGS satellite orbits. Subsequent analysis demonstrates that there are no significant coordinate differences introduced when applying different subsets of IGS reference stations to link the regional GPS network to ITRF.

This record represents a summary of the specifications of most surveys held in the National Airborne Geophysic Database (updated from 2001 when the fifth edition of this record was released).

Geoscience Australia and State and Territory Geological Surveys have systematically surveyed most of the Australian continent over the past 40 years using airborne gamma-ray spectrometry to map potassium, uranium and thorium elemental concentrations at the Earth's surface. However, the individual surveys that comprise the national gamma-ray spectrometric radioelement database are not all registered to the same datum. This limits the usefulness of the database as it is not possible to easily combine surveys into regional compilations or make accurate comparisons between radiometric signatures in different survey areas. To solve these problems, Geoscience Australia has undertaken an Australia-Wide Airborne Geophysical Survey (AWAGS), funded under the Australian Government's Onshore Energy Security Program, to serve as a radioelement baseline for all current and future airborne gamma-ray spectrometric surveys in Australia. The AWAGS survey has been back-calibrated to the International Atomic Energy Agency's (IAEA) radioelement datum. We have used the AWAGS data to level the national radioelement database by estimating survey correction factors that, once applied, minimize both the differences in radioelement estimates between surveys (where these surveys overlap) and the differences between the surveys and the AWAGS traverses. The database is thus effectively levelled to the IAEA datum. The levelled database has been used to produce the first 'Radiometric Map of Australia' - levelled and merged composite potassium (% K), uranium (ppm eU) and thorium (ppm eTh) grids over Australia at 100 m resolution. Interpreters can use the map to reliably compare the radiometric signatures observed over different parts of Australia. This enables the assessment of key mineralogical and geochemical properties of bedrock and regolith materials from different geological provinces and regions with contrasting landscape histories.

The individual surveys that comprise Australia's national airborne gamma-ray spectrometric radioelement database are not all registered to the same datum. Older survey results are presented in units of counts/sec, which depend on factors such as survey flying height and detector volume. Even recent surveys can have a significant mismatch along common borders due to limitations in spectrometer calibration and data processing procedures, as well as environmental effects that result in temporal changes in the gamma-radiation fluence rate at the earth's surface. These problems limit the usefulness of the national radioelement database for uranium exploration, and other applications, as it is difficult to compare radiometric signatures observed in different parts of the continent. Geoscience Australia has recently undertaken an Australia-Wide Airborne Geophysical Survey (AWAGS), funded under the Australian Government's Onshore Energy Security Program, to serve as a radioelement baseline for all current and future airborne gamma-ray spectrometric surveys in Australia. The survey data were acquired and processed according to international standards, and the final estimates of radioelement concentrations along the AWAGS lines are consistent with the International Atomic Energy Agency's (IAEA) radioelement datum. The AWAGS survey has been used to adjust the hundreds of surveys that comprise the national radioelement database to a common datum. This was achieved by estimating, for each survey in the national database, correction factors that, once applied, minimize both the differences in radioelement estimates between surveys (where these surveys overlap) and the differences between the surveys and the AWAGS traverses. This effectively levels the surveys to the IAEA datum to produce a consistent and coherent national gamma-ray spectrometric coverage of the continent. The levelled database has been used to produce the first "Radiometric Map of Australia" - levelled and merged composite potassium (% K), uranium (ppm eU) and thorium (ppm eTh) grids over Australia at 100 m resolution. Interpreters can now reliably relate geochemical patterns observed in one area to similar patterns observed elsewhere, and better appreciate the significance of broad-scale variations in radioelement concentrations. There are several applications that will benefit from the updated database. These include uranium and thorium exploration through the ability to make quantitative comparisons between radiometric signatures in different survey areas, and the derivation of a radiation risk map of Australia for natural sources of radiation.

Phase 3a of the Broken Hill Managed Aquifer Recharge (BHMAR) project is tasked with assessing whether a sustainable ground water extraction approach, including MAR, is a feasible option for securing Broken Hill's water supply in times of drought. More specifically, the project is charged with determining, with a defined level of confidence, whether at least 3 years water supply (~30 GL), at a similar salinity to that already available for Broken Hill would be available at all times through these new arrangements. This interim report documents the preliminary findings of the Phase 3a study, which is focussed on a priority target immediately south of Menindee.

Onshore Energy and Minerals Division Open Day Word Game Find the hidden answer to the question following: What are OEMD looking for? 1. What does 'O' in OEMD stand for? 2. What is one type of scientist that works at GA? 3. What type of energy comes from hot rocks? 4. What are the oldest rocks on the Australian continent? 5. Name one type of mineral ore found in Australia 6. What is one type of uranium system? (___________ Uranium.) 7. What does the 'm' in AEM stand for? 8. What type of electronic positioning device does a geologist use in the field? 9. Name a type of ore from WA? (______ Ore) 10. Name a tool that looks a bit like a hammer that a geologist uses in the field? 11. What energy resources can Radiometrics be used to map? 12. The Gravity Anomaly Map covers all of 13. What GIS tool is available on the GA website? 14. Vibrations are used in what kind of geo-scientific survey?

Progress report delivered to National Water Commission (NWC) by Geoscience Australia as Milestone 9 of the Palaeovalley Groundwater Project, submitted 1 July 2011. Report for external client use only and not for public distribution without express permission of the NWC.