Minerals Alert November 2011

A monthly online newsletter with product news, data releases and projects relating to the minerals and energy exploration industry.

1. Release of the twelfth edition of the Index of Airborne Geophysical Surveys and Index Maps

Index of Airborne Geophysical Surveys (Twelfth Edition), Geoscience Australia Record 2011/36, was released by Geoscience Australia on 14 October 2011. The new edition, which is available for free download from Geoscience Australia's website, is the latest compilation of metadata of Australian open file government airborne surveys and supersedes the previous 11th edition (May 2010). The Index includes specifications of approximately 1080 surveys conducted between 1951 and 2011 which comprise more than 32.8 million line kilometres of mainly total magnetic intensity, gamma-ray spectrometric and land elevation data. Specifications for each survey are presented in tabular format, with four surveys per page and arranged in numerical order, based on assigned Geoscience Australia Project Numbers.

Clients can quickly identify airborne surveys of interest and obtain the relevant metadata by using two lookup tables:

  • A table listing survey names in alphabetical order, with corresponding Geoscience Australia Project Numbers and
  • A table listing 1:250 000 map sheet names in alphabetical order, along with Geoscience Australia Project Numbers of surveys located on each map sheet.

Also released are two maps - the 2011 edition of the aeromagnetic and gamma-ray survey index maps - which indicate the standard of data coverage (based on survey line spacing) over Australia in relation to 1:250 000 map sheets. Areas covered by surveys conducted by the States during 2011/12 are also shown on these maps.

Further information or copies of the record and maps in PDF format can be obtained from Geoscience Australia's free download page.

For information email Peter Percival, or phone +61 2 6249 9578.

2. New Geochron data delivery

The public can now access Geoscience Australia’s geochronological data again via the new Geochron Data Delivery system. Users can discover geochronological data, view on-screen summaries and download Microsoft Excel workbooks containing comprehensive data including:

  • selected samples and their parent sites;
  • various subsample material targeted for analysis;
  • each overarching interpretation and its subsidiary data-grouping and interpreted age information;
  • each underlying analytical data-table, and associated information pertaining to analytical sessions, data-reduction parameters, and summary metadata for concurrently-analysed reference materials.

The initial (October 2011) release of the Geochron Delivery system delivers a small subset of Geoscience Australia's U-Pb SHRIMP data. This corresponds to approximately 20% of the U-Pb SHRIMP data held in the legacy OZCHRON system, with a strong bias towards data collected prior to 1997. Uploading data from 2007-present is an ongoing process, although some data from South Australia is already available. Migration of the remaining U-Pb SHRIMP data from OZCHRON will be completed by June 2012.

Geochronological and related data obtained via other methods such as K-Ar, Ar-Ar, Rb-Sr, U-Pb via conventional isotope-dilution TIMS, and Lu-Hf will be added at a later date. More information about the new system can be found at the Geochron Data Delivery page.

For further information, please email simon.bodorkos@ga.gov.au or phone +61 2 6249 9869; or email keith.sircombe@ga.gov.au or phone +61 2 6249 9543.

3. Pine Creek Region airborne electromagnetic (AEM) survey, Northern Territory

The Pine Creek Region airborne electromagnetic (AEM) survey, Geoscience Australia’s second major electromagnetic survey, is now finalised with the release of a comprehensive interpretation report which includes a large number of high-resolution images used to highlight new methodologies developed to reveal the maximum geological information from the AEM data. The report, Geoscience Australia Record 2011/18, is available as a free download.

4. Seismic data and workshop for the Capricorn Survey, Western Australia, 23 November 2011

The Capricorn deep crustal seismic survey was acquired in 2010 and extends almost 600km from the Pilbara Craton, across the Hammersley Basin and the Capricorn Orogen, to the Yilgran Craton in Western Australia. This survey was a collaborative project between Geoscience Australia, AuScope, and the Geological Survey of Western Australia. Funding came from Geoscience Australia’s Onshore Energy Security Program, AuScope Earth Imaging and Western Australia’s Royalties for Regions Exploration Incentive Scheme. The survey consists of three traverses with a total length of 581km. These seismic and gravity data aim to image the extent of the Archean crust beneath the Capricorn Orgeny and identify the relationship between the Pilbara and Yilgarn cratons.

The processed SEG Y data, TIFF images, location information, and gravity data are available as a free download.

To obtain further details on the seismic data, please email tanya.fomin@ga.gov.au, or phone +61 2 6249 9896.

There will be a full day workshop on Wednesday 23 November 2011 in Perth to present the results of Capricorn seismic reflection and magnetotelluric data. The survey and the workshop are a joint venture involving Geoscience Australia, the Geological Survey of Western Australia, AuScope, ANSIR and the University of Adelaide.

Registrations are through the Geological Survey of Western Australia.

To obtain further details on the workshop, please email russell.korsch@ga.gov.au or phone +61 2 6249 9495.

5. Frome airborne electromagnetic survey data interpretation workshop, South Australia, 30 November 2011

Geoscience Australia and Primary Industries and Resources South Australia (PIRSA) will hold a one day workshop on interpretations and implications from the Frome airborne electromagnetic (AEM) survey. Workshop speakers will include staff from Geoscience Australia, PIRSA and industry, and will detail highlights from the survey data.

The workshop will be held on 30 November 2011 between at 9:00 am and 4:00 pm in the University of Adelaide Department of Geology and Geophysics Mawson Theatre and will include morning refreshments and a light lunch. Attendance is free, but please advise your attendance for catering purposes.

For more information, or to reserve a seat, contact Dr Ian Roach, Geoscience Australia. Email Ian.Roach@ga.gov.au, or phone +61 2 6249 9683.

6. Major International Resources and Energy Event, 34th International Geological Congress (IGC), Brisbane 5-10 August 2012

Under the theme "Unearthing our Past and Future - Resourcing Tomorrow", around 40 per cent of the IGC scientific program will be of direct interest to the resources and energy sectors. Each of the five days of Congress sessions will have several symposia on minerals, petroleum and energy.

Further details on the event will be available with the publication this month of the Third Circular.

7. 6th International SHRIMP Workshop, 1-4 August 2012

The Geoscience Australia Geochronology Laboratory is hosting the 6th Biennial Sensitive High Resolution Ion MicroProbe (SHRIMP) Workshop in Queensland from 1-4 August 2012 to discuss, debate and celebrate all matters SHRIMP. The workshop will immediately precede the 34th International Geological Congress in Brisbane starting on 5 August 2012.

For more details on the workshop and to download the first circular, please go to the SHRIMP Workshop website.

For further information, please email SHRIMP2012@ga.gov.au; or phone Keith Sircombe on +61 2 6249 9543 or Emma Chisholm on +61 2 6249 9044.

8. Update on geophysical data releases

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

Minerals Alert Geophysical Surveys Table - survey boundary polygons in MapInfo TAB format.

To obtain further details on the survey acquisition please email murray.richardson@ga.gov.au or phone +61 2 6249 9229.

9. About Minerals Alert

For more information, email roger.skirrow@ga.gov.au or phone +61 2 6249 9442.

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

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