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Project name: 3D Data Integration Modelling
Project leader: Adrian Fabris
Project group: Simon vander Wielen
Stephan Thiel
Tim Keeping
John Keeling
James Goodwin (Geoscience Australia)
Richard Lane (Geoscience Australia)
Richard Chopping (Geoscience Australia)
David Giles (DET CRC)
Program: Next Generation Copper Discovery

Synopsis

3D DIM project location

The South Australian Geophysical Reference Model (SAGRM) forms part of a collaborative project between the Department of State Development, the University of Adelaide, Geoscience Australia and the Deep Exploration Technologies Cooperative Research Centre.

It is a valuable new research and exploration tool that enables users to visualise, query and interpret the state’s vast archive of geophysical datasets in a full 3D environment.

The model incorporates new gravity, magnetic, and magnetotelluric inversions with existing deep crustal reflection seismic surveys and seismological velocity models into an integrated state-wide 3D model to a depth of 100 km.

This is the first time a model of this size and complexity of geophysical data has been produced for the entire state. The model is a significant contribution to the lithospheric architecture theme of the UNCOVER initiative. The SAGRM is designed to be readily updated and will incorporate new datasets, such as AusLAMP, AusArray and the Gawler Craton magnetic survey, as they become available.

Background/Aims

The model includes constrained gravity and magnetic inversions for South Australia that were run using University of British Columbia inversion codes provided through the National Computational Infrastructure in Canberra.  

These inversions were run with publicly available geophysical data including magnetotelluric, resistivity and seismic velocity models integrated in GoCAD geological modelling software. Additional datasets also included in the modelling process include topographical data and petrophysical data for the entire state.

Key outcomes

  • Improved understanding of the 3D architecture and geophysical properties of the South Australian lithosphere
  • Broad-scale exploration vectors

Schedule for information and product delivery

DeliverableTimeframe
Report book - Key insights from the South Australian Geophysical Reference Model TBA
MESA Journal Article TBA
South Australian Geophysical Reference Model August 2016