The AuScope Far North Queensland survey

Collins, W.J., Kennett, Brian, and Goleby, Bruce (2008) The AuScope Far North Queensland survey. In: Australian Earth Sciences Convention. p. 72. From: Australian Earth Sciences Convention 2008, 20-24 July 2008, Perth, WA, Australia.

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[Extract] The Australian Government's National Collaborative Research Infrastructure Strategy (NCRIS) intiative awarded AuScope ( $42.8 million to support geoscience. AuScope will establish world-class infrastructure to characterise the structure and evolution of the Australian continent in a global context, from surface to core in space and time; and provide better understanding of the implications for natural resources, hazards and environment. The Earth Imagine and Structure (ANSIR) component of AuScope is focused on providing 3D databases of geologically important regions, which will be achieved through the collection of GeoTransects. AuScope will collaborate with, and use the services of ANSIR to achieve this.

In August 2007, the Far North Queensland (FNQ) Tasman Line project became the first AuScope Tranverse to be acquired. This survey links with the Ga/GSQ Isa-Georgetown-Charters Towers survey and together, provide an exceptional opportunity to image this important region of Australia crust in three-dimensions. FNQ best preserves the Tasman Line, which is the boundary between the Precambrian craton of Australia, and the Phanerozoic Tasmanides to the east.

The correlation between the lithospheric-scale structures evident in the seismic tomography images with mapped surface structures from observed geology suggests that this region is ideal for investigating the relationship between major upper crustal province boundaries and major features observed in geophysical images.

The FNQ AuScope Reflection Traverse will address important questions regarding the nature of continental growth in eastern Australia. The raw field stack indicates a significant change in Moho depth on either side of the Tasman Line, considerable coherent reflectivity within the middle crust and evidence of shallow mid-crustal structures. However, the seismic imaging does not indicate teh presence of a single major structure that corresponds with the Tasman Line. The data now requires processing to enhance the seismic image within the upper crust.

Item ID: 27943
Item Type: Conference Item (Abstract / Summary)
ISSN: 0729-011X
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Date Deposited: 25 Jul 2013 05:38
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