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Mineral Resources Tasmania

Alberton-Mathinna 3D geological and geophysical modelling

The Alberton-Mathinna 3D geological and geophysical model extends to a depth of 5 km within the area depicted. It expresses a new synthesis based on geological mapping together with geophysical and structural interpretations previously produced by MRT and other geoscientists over several decades. The model is constrained by 3D geophysical modelling using MRT's gravity and magnetic survey data coupled with drilling and rock physical property databases.   This information has been used to derive uncertainty estimates for each element in the model volume.  The model files also include nominal density and magnetic susceptibility estimates obtained for each voxel, thus incorporating intra-unit variations.

The geological model was constructed using the GOCAD® Mining Suite from Mira Geoscience, with initial geophysical inversions via the VPmg code. Further geophysical modelling and uncertainty characterisation was carried out with the GeoModellerTM software from Intrepid Geophysics.

The Alberton-Mathinna 3D model is being distributed primarily as a Geoscience ANALYST projectGeoscience ANALYST is visualisation and communication software for GoCAD® 3D models, made freely available by Mira Geoscience. All major components of the 3D modelling process from sections to geophysical inversion results are obtainable in their original formats.

Explanatory notes are also provided.

For further information please contact Daniel Bombardieri or Mark Duffett (click here for contact information)