Update on Geophysical Data Acquisition February 2015
| Location | State | Survey | % Complete | Gravity Stations | Flight Lines | Spacing | Ground Clearance | Comments |
|---|---|---|---|---|---|---|---|---|
| Southern Thomson Orogen | NSW/QLD | Airborne electromagnetic | 100% | N/A | 4 198 line km | 5000m | TBA | The final point located AEM data from the Darling-Paroo survey were accepted by GA on 1 October. The remaining deliverables of the final data DVD's and hardcopy report have also been accepted by GA. |
| Sir Samuel-Throssell Gravity Survey | WA | Gravity | 100% | 11 702 | N/A | 2.5km regular grid | N/A | The survey covers the Sir Samuel, Duketon, Throssell, Leonara (northern half), Laverton (northern half) and Rason (northern half) standard 1:250000 Map Sheets. The nominal survey boundary covers an area of 73 800 km2 The survey commenced on 19 June 2014 and completed data acquisition on 7 September. Final data were supplied to GA for assessment on 17 November. The data were released via GADDS on 17 December 2014. |
| West Amadeus | NT | Gravity | 100% | 8 105 | N/A | 4km regular with areas to be defined for 2km infill | N/A | The survey covers the Mount Rennie (pt), Mount Liebig (pt), Bloods Range, Lake Amadeus (pt); Petermann Ranges and Ayers Rock (pt) standard 1:250000 Map Sheets. The nominal survey boundary covers an area of 45 050 km2. The survey commenced on 29 June 2014 and completed data acquisition on 11 August. Final data were received by GA on 3 November - all data have passed QA/QC. GA is yet to receive the final Operations and Processing report. The data were released by the NTGS on 25 November 2014 via their website. The data were released via GADDS on 17 December 2014. |
| Dunmarra | NT | Airborne magnetic and radiometric | 100% | N/A | Estimated 103 909 line km; east-west; 36 280 km2 | 400m | 80m agl | The survey is located in an area between the 2007 Tanumbirini and 2001 Sturt airborne geophysical surveys. The survey collected approximately 103 900 line km of new data on east-west flight lines spaced 400 metres apart and flown at a nominal 80 metres above ground level. The survey covers parts of the Katherine, Larrimah, Hodgson Downs, Daly Waters, Tanumbirini and Newcastle Waters standard 1:250000 Map Sheets. The survey commenced on 28 June 2014 and completed flying on 10 October. Preliminary final magnetic (grid and vector), radiometric (grid) and elevation (grid and vector) data have been received by GA and are nearly finished QA/QC assessment. |
Thomson Gravity | NSW/QLD | Gravity | 100% | 3 660 | N/A | 333m | N/A | The survey consists of eight traverses on the Toompine, Eulo, Cunnamulla, Yantabulla, Enngonia, Louth and Bourke standard 1:250000 Map Sheets. The survey commenced on 17 July 2014 and completed data acquisition on 15 September. Preliminary final data were received at GA on 9 October. The final data were released via GADDS on December 2014. |
Gippsland Gravity | VIC | Gravity | 100% | 1 213 | N/A | 500m | N/A | The Geological Survey of Victoria designed a survey of approximately 1440 stations at a nominal 400 metre station spacing on 12 separate traverses on the Warragul standard 1:250000 Map Sheet. The traverses cover an area of approximately 8358 km2. The survey commenced on 30 June 2014 and completed data acquisition on 21 July. The processed data passed assessment by GA on 19 September. The final Operations Report was delivered to GA for assessment on 11 October. The data are in preparation for release via GADDS when GSV advises GA of their preferred release date. |
North McArthur Basin | NT | Gravity | 100% | 7 315 | N/A | 4km regular with areas of 2 km infill; 1 area of traverses spaced 4km apart with a station spacing of 1 km | N/A | The survey covers all or part of Arnhem Bay, Gove, Mt Evelyn, Mt Marumba, Blue Mud Bay, Katherine, Urapunga and Roper River standard 1:250 000 standard Map Sheets. The survey commenced on 16 September and completed data acquisition on 4 November. The final data re under QA/QC assessment by GA. |
| Coompana | SA | Airborne Magnetic and Radiometric | TBA | N/A | Estimated 249 600 line km; | 400m & 200m | 80m agl | The survey covers Birksgate (pt), Noorina, Wells (pt), Wyola, Maurice (pt), Cook, Ooldea (pt), Coompana (pt) and Nullarbor (pt) 1:250 000 standard Map Sheets. The survey is expected to commence flying on 7 February 2014. |
Processed inversion models of the pre-competitive airborne electromagnetic (AEM) data for the greenfields Southern Thomson region (border of NSW/Qld) were publically released on 24 December. These datasets have been processed on the National Computational Infrastructure (NCI) supercomputer and include, for the first time, a sophisticated Monte Carlo analysis of data uncertainty for mapping cover thickness and basement conductors. The inversion data are accessible via the link http://www.ga.gov.au/metadata-gateway/metadata/record/gcat_82564
Updated National Geophysical digital datasets of the Magnetic Anomaly and Radiometric Maps of Australia were released via GADDS on 28 January. This release contains the 6th edition of the magnetic grid and the 3rd edition of the radiometric grids of Australia. In recent years significant areas of Australia have been flown with airborne radiometric surveys resulting in significant portions of the continent being covered with radiometric data.
Geoscience Australia will be managing the data acquisition program in Western Australia, Victoria, New South Wales, Queensland and the Northern Territory.
For more information, please email clientservices@ga.gov.au; or phone 1800 800 173.
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