Joint survey to increase knowledge

23 April 2012

Hemi60 Vibroseis vibrator trucks undertaking a seismic transect. Copyright Geoscience Australia.

Hemi60 Vibroseis vibrator trucks
undertaking a seismic transect.
© Geoscience Australia

A cooperative venture between Governments and the mining industry will boost available seismic data being acquired in Western Australia.

The Tropicana Joint Venture partners, AngloGold Ashanti Australia Limited (70% and manager) and Independence Group NL (30%) have agreed to join in a deep seismic survey being undertaken by Geoscience Australia on behalf of the Geological Survey of Western Australia as part of the Western Australian Exploration Incentive Scheme which is funded under the Western Australian Royalties for Regions program.

The Tropicana Joint Venture, which is developing the Tropicana Gold Mine, has undertaken to facilitate an 81 kilometre transect along a line which will include its extensive tenement holdings in eastern Western Australia.

The 81 kilometres of data will be added to the 592 kilometres of deep crustal seismic reflection data obtained over the Albany Fraser Orogen on behalf of the Geological Survey of Western Australia.

The data is obtained by recording signals reflected by geological strata down to several kilometres below the surface from vibrations generated by Hemi60 Vibroseis trucks. The recorded signals are then interpreted by seismologists to map the sub-surface strata.

Geoscience Australia geophysicist, Ned Stoltz, said the combined AngloGold Ashanti-Independence Group and Geological Survey of Western Australia survey results will provide a large amount of pre-competitive data in a frontier area with demonstrated potential for major new deposits. This will improve available knowledge about the geological architecture associated with the Albany Fraser Orogen.

"Interpretation of all the data will greatly assist both the Tropicana Joint Venture and other mining companies contemplating investigation in the region and significantly reduce their level of exploration risk," Mr Stolz said.

"It is anticipated that interpretation of the survey data will generate new thinking about the eastern boundary of the Yilgarn Craton and help to clarify why the Tropicana gold deposit is located where it is," he said.

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