Minerals Alert December 2007

  1. Australia's Identified Mineral Resources 2007
  2. Airborne EM Survey Program 2008-2009 - Pine Creek Region N.T.
  3. New 1:1 Million Scale Geology Dataset by Christmas
  4. Geochronological synthesis and Time-Space plots for Proterozoic Australia
  5. New Gravity Survey Data from New South Wales added to the Australian National Gravity Database
  6. Notification of planned improvements to the Australian National Gravity Database
  7. Useful Geoscience Australia Websites
  8. Update on geophysical data releases
  9. About Email Alert

1. Australia's Identified Mineral Resources 2007

The latest edition of Australia's Identified Mineral Resources released by Geoscience Australia contains a wealth of minerals exploration and development information and is incorporated in the Australian Mines Atlas.

The assessment includes evaluations of long-term trends in mineral resources, international rankings, summaries of significant exploration results, brief reviews of mining industry developments and an analysis of mineral exploration expenditure across Australia. Australia's resource stocks remain healthy overall, although there has been a levelling off of resource trends for several major commodities. Strong global demand for mineral resources, expansions in production of thermal coal, iron ore and other commodities continued in 2006 and, overall, the mineral resources sector contributed substantively to Australia's prosperity. Estimates of Australia's resources of coal bed methane gas are reported for the first time in this year's edition.

For further information, please email Aden McKay; or phone +61 (0)2 6249 9230.

2. Airborne electromagnetic survey program 2008-2009 - Pine Creek region Northern Territory - Call for expression of interest and subscribers

Geoscience Australia is planning a program of airborne electromagnetic mapping over the Pine Creek area in the Northern Territory. The objective of the survey is to improve the understanding of the geology and the mineral potential of the survey area. The area to be covered includes parts of the Pine Creek, Port Keats, Fergusson River, Mount Evelyn, Katherine, Alligator River, Cobourg Peninsula, Junction Bay and Milingimbi 1:250,000 Sheet areas as shown in this diagram.

Mineral exploration companies with an interest in this area are invited to register their interest in the regional survey. Companies also are invited to participate in the project by contributing to the additional costs of surveying. Contributions can be made to extend the current survey area and/or in-fill fly the current survey area in locations of particular exploration interest.

Coverage of this area is being made as part of the Australian Government Onshore Energy Security Initiative funding package and as such the data acquired will be publicly available. However, data acquired under company subscription will be subject to a confidentiality period prior to public release. The period of confidentiality will be agreed between Geoscience Australia and the successful subscriber prior to the acquisition commencing.

From the company proposals received, Geoscience Australia will select areas for in-fill/extension flying of the current survey area that best complement the objective of the survey. Expressions of interest should be submitted by Friday 1 February 2008 and should include a map of the desired infill/extension area and survey specifications.

For further information, email Murray Richardson; or phone +61 (0) 2 6249 9229 or Alan Whitaker; or phone +61 (0) 6249 9702.

3. New 1:1 million scale geology dataset by Christmas

Updated seamless digital surface (outcrop) geology data for the eastern States of Australia will be released by Christmas. The data will be available for download from the Geoscience Australia website as individual State datasets.

The new 2007 data will be the second edition for Queensland and New South Wales, and third edition for Victoria and Tasmania.

Improvements to the geology data includes:

  • the incorporation of recent mapping in Queensland, New South Wales and Victoria;
  • more extensive descriptions of geological units;
  • a more consistent portrayal of regolith units;
  • a unique letter code for all units across all four eastern States; and
  • edgematching to Northern Territory (released earlier in 2007) and the soon-to-be-released South Australia 1:1 million scale dataset.

The current Surface Geology of Australia (1:1,000,000 scale) datasets are available through Geoscience Australia's free downloads.

For further information, email Ollie Raymond; or phone +61 (0) 2 6249 9575.

4. Geochronological synthesis and Time-Space plots for Proterozoic Australia

A Geoscience Australia Record (number 2007/06) entitled Geochronological synthesis and Time-Space plots for Proterozoic Australia is now available.

This record summarises current understanding of the timing of magmatic, sedimentary, metamorphic, deformational and mineralisation events for many of Australia's major Proterozoic terranes, including the Gawler Craton, Curnamona Province, Mount Isa Inlier, McArthur Basin, Georgetown Inlier, Pine Creek Orogen, Halls Creek Orogen, Rudall Complex, Capricorn Orogen, Albany Fraser Orogen and the Musgrave Province. The synthesis was completed as part of Geoscience Australia's Proterozoic Synthesis Project, in collaboration with State and Northern Territory survey partners.

For further information, email Narelle Neumann; or phone +61 (0) 2 6249 9429.

5. New gravity survey data from New South Wales added to the Australian National Gravity Database

Gravity data from two surveys, one located in north west New South Wales and another in southern New South Wales and northen Victoria, have recently been incorporated into the Australian National Gravity Database.

The southern gravity survey of 3,519 stations over the interpreted extensions of the Stawell and Bendigo zones covered the Pooncarie 1: 250,000 sheet area and parts of the Ana Branch, Mildura, Balranald, Hay and Deniliquin 1:250 000 sheet areas at a station spacing of four kilometres by four kilometres.

The northern gravity survey of 4,719 stations located in the Thomson Orogen region covered parts of the Louth, White Cliffs, Urisino and Yantabulla 1:250,000 sheet areas at a station spacing of four kilometres by four kilometres with infill stations at two kilometres by two kilometres on Louth and White Cliffs.

These data were provided to Geoscience Australia by the Geological Survey of New South Wales.

All open file data in the Australian National Gravity Database, can be obtained free-of-charge using the Geophysical Archive Data Delivery System (GADDS).

For further information, email Mario Bacchin; or phone +61 (0) 2 6249 9308.

6. Notification of planned improvements to the Australian National Gravity Database

From Tuesday 5 February 2008 gravity data held in the Australian National Gravity Database will be in a new gravity datum called Australian Absolute Gravity Datum 2007 (AAGD07). This new datum supercedes the previous ISOGAL84 datum. Others improvements which will take effect are:

  • the Vertical Datum will use ellipsoidal heights relative to the GRS80 ellipsoid;
  • the Horizontal datum will not change, and continue to use the GDA94 datum;
  • Theoretical Gravity will use the closed form of the 1980 international gravity formula;
  • the Free Air Correction will use the second order approximation for the change in the theoretical gravity based on the GRS80 ellipsoid with height relative to the ellipsoid; and
  • the Bouguer Correction will use the closed form equation for the gravity effect of a spherical cap of radius 166.7 km with height relative to the ellipsoid.

For further information, email Ray Tracey, or phone +61 (0) 2 6249 9279 or Mario Bacchin or phone +61 (0) 2 6249 9308.

7. Useful Geoscience Australia Websites

Geoscience Australia's website has a host of informative products including:

8. Update on geophysical data releases

The current status of Geoscience Australia's geophysical survey data acquisition is available in a comprehensive table.

For further information, email Murray Richardson; or phone +61 (0)2 6249 9229.

9. About Email Alert

For more information contact Mike Huleatt on +61 2 6249 9087 or email mike.huleatt@ga.gov.au.

To view past editions of Geoscience Australia's Minerals Alert, visit the Minerals Alert Newsletter Archive.

Topic contact: media@ga.gov.au Last updated: October 4, 2013