Minerals Alert August 2005

  1. Minerals Division Chief
  2. Australian gold, nickel and copper resource maps
  3. Australian mines and mineral deposit maps
  4. Geoscience Australia at Diggers and Dealers
  5. pmd*CRC conference volume
  6. Update of Tanami 3D GIS
  7. Australian gold exploration
  8. Paterson fieldwork
  9. The Tanami Seismic Collaborative Research Project
  10. Thomson-Lachlan Seismic Project
  11. About Minerals Alert

1. Minerals Division Chief

Chris Pigram has moved from the Chief of Minerals Division at Geoscience Australia to become Chief of the Geospatial and Earth Monitoring Division. Until a new Chief is appointed, Ian Lambert will act as Chief until the end of August when Peter Southgate will become Acting Chief.

2. Australian gold, nickel and copper resource maps

Geoscience Australia has released three new maps of the distribution of Australia's gold, nickel, and copper resources. They show the location of mineral deposits and occurrences for each metal. Deposits are shown according to their total contained metal and the classification of the regions in which they occur according to the total contained metal. Total contained metal is the aggregate of past production and remaining resources in a deposit. The resource data used to prepare these maps was derived from publicly available company reports and other reports. Each map is available at 1:10 million scale and is available for download free of charge. Compilation of data for these maps is ongoing and new editions are expected to be released periodically.

For further information, please contact Mike Huleatt on +61 (0)2 6249 9087, or email mike.huleatt@ga.gov.au.

3. Australian mines and mineral deposit maps

Geoscience Australia has released a new edition of the 1:5 million scale Australian Mines and Mineral Deposits map. This is a more detailed version of the 1:10 million scale map released in December 2004. Both maps may be downloaded free of charge.

For further information, please contact Mike Huleatt on +61 (0)2 6249 9087, or email mike.huleatt@ga.gov.au.

4. Geoscience Australia at Diggers and Dealers

Geoscience Australia is co-ordinating an exhibition on behalf of the Australian, State and NT Geological Surveys at Diggers and Dealers Mining Forum, Kalgoorlie, 8-10 August 2005. The exhibition will feature current GA and State/NT programs and initiatives including the regional seismic program to define the crustal architecture and mineralisation systems, and recent drilling intersections and discoveries of note. The Geological Survey of WA will also have a separate exhibition.

For further information, please contact Lynton Jaques on +61 (0)2 6249 9745, or email lynton.jaques@ga.gov.au.

5. pmd*CRC conference volume

The Predictive Mineral Discovery Cooperative Research Centre (pmd*CRC) held a conference in June 2004 to present the results of research conducted over its first three years to its industry sponsors. The conference covered aspects of all of the CRC's programs including terrains (Yilgarn, Mt Isa, Curnamona and western Victoria), architecture, fluids, history and modelling. The results were subject to a 12 month confidentiality period but the extended abstracts are now published as Geoscience Australia Record 2004/09, which contains 62 contributions. The entire record (235 pp.) and individual extended abstracts can be downloaded from GA's website.

For further information, please contact Russell Korsch +61 (0)2 6249 9495, or email russell.korsch@ga.gov.au.

6. Update of Tanami 3D GIS

The Tanami 3D GIS has been updated to include:

  • A new, more user-friendly interface (including buttons for more commonly used operations);
  • Inversion surfaces, including low density (which approximates granites), and high magnetic susceptibility;
  • Colour coding of faults (including newly modelled faults) to indicate inferred geological age;
  • Geophysical interpretation of the western Tanami; and
  • Depth-to-basement point data (from drill hole data) and Euler deconvolution of aeromagnetic data (depth-to-magnetic basement).

For further information, please contact David Huston on +61 (0)2 6249 9577, or email david.huston@ga.gov.au.

7. Australian gold exploration

An article in the July/August issue of the AusIMM Bulletin reviews Australian gold exploration and resources growth over the past 25 years. Key findings were that in recent years resource growth has been predominantly through addition of resources at existing deposits and that rates to discovery of new large deposits have fallen. Although exploration expenditure globally and in Australia have risen, gold exploration and growth has been only modest. The paper argues that declining discovery rate can be attributed to the difficulties and costs associated with exploration in green fields provinces, and especially those under surficial cover.

For further information, please contact Lynton Jaques on +61 (0)2 6249 9745, or email lynton.jaques@ga.gov.au.

8. Paterson fieldwork

GA geoscientists have undertaken fieldwork in the Paterson region as part of the new Paterson project. The fieldwork, which extended from the Rudall area in the south to the Ankatell area in the north, was aimed at understanding Neoproterozoic Au-Cu, Cu and Zn-Pb mineral systems and their relationship to the basin that hosts them and the underlying Palaeoproterozoic basement. The goals of this initial field season were to:

  • establish a sequence stratigraphic model for the Paterson region;
  • determine the structural-tectonic history of the region;
  • ground-truth Aster spectral data;
  • establish structural and stratigraphic controls on mineralisation; and
  • collect samples to establish the ages of the stratigraphic units, intrusive units and mineralisation and the geochemistry of granites.

For further information, please contact David Huston on +61 (0)2 6249 9577, or email david.huston@ga.gov.au.

9. The Tanami Seismic Collaborative Research Project

Deep seismic reflection acquisition for Tanami Seismic Research Project finished successfully on Sunday 10th July. Traverses completed include:

  • 05GA-T1 - 354.28 km;
  • 05GA-T2 - 101.80 km;
  • 05GA-T3 - 179.24 km; and
  • 05GA-T4 - 84.40 km.

Collection of new gravity and wide angle data also finished prior to the seismic work. The project, involving Geoscience Australia, the Geological Survey of Western Australia, the Northern Territory Geological Survey, Newmont Exploration Pty Ltd and Tanami Gold NL, has produced exciting raw images of the crustal architecture of the Tanami region that, with enhanced processing, promise to image details of the region's three-dimensional geometry and its mineral systems. Processing has started with a focus on Traverse 05GA-T3, 05GA-T2 and 05GA-T1, with final processing anticipated early 2006. GA, GSWA, NTGS, Tanami Gold NL and Newmont Exploration will commence interpretation late 2005 and hope to have final interpreted sections mid-2006.

For further information, please contact Bruce Goleby on +61 (0)2 6249 9404, or email bruce.goleby@ga.gov.au.

10. Thomson-Lachlan Seismic Project

ANSIR, the National Facility of Earth Sounding, is scheduled to begin collection of deep seismic data in the Bourke-Wilcannia region of northwestern NSW in early August with acquisition of approximately 260 km of seismic across Thompson-Lachlan Boundary. The objectives of this survey are to solve one of the key problems in the Tasmanides of eastern Australia, namely the location and nature of the east-west boundary between the Lachlan and Thomson orogens in northwest New South Wales. In the Lachlan Orogen area, the seismic will also provide information of the elements of the northern part of the Darling Basin - the Nelyambo Trough and Mt Jack High. This project is a collaborative project between Geoscience Australia, the New South Wales Department of Primary Industries - Mineral Resources (DPI-MR) and the predictive mineral discovery Cooperative Research Centre (pmd*CRC).

For further information, please contact Bruce Goleby on +61 (0)2 6249 9404, or email bruce.goleby@ga.gov.au.

11. About Minerals 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