QUEST Project: 3D Inversion Modelling, Integration, and Visualization of Airborne Gravity, Magnetic, and Electromagnetic Data (NTS 93A, 93B, 93G, 93H, 93J, 93K, 93N, 93O, 94C, 94D)
- Nigel Phillips, Mira Geoscience Ltd.
3D inversion modelling of geophysical data provides located physical property distributions of the earth. This process adds value to geophysical data and enables direct spatial correlation between physical properties and geology, geochemistry, drill-hole databases, and known mineral resources or mineralized showings. At a regional scale, large geologic features can be defined, the thickness of overlying units better determined, and the relationship to mineralization can be investigated. The resulting physical property models represent attributes of the earth in 3D, and as such, are best viewed and analysed in a 3D environment where their full context can be utilized.
To further the use, benefit and understanding of gravity, magnetic, and electromagnetic data collected in two airborne surveys over the QUEST project area, the Advanced Geophysical Interpretation Centre at Mira Geoscience is inverting these data to provide density contrast, magnetic susceptibility, and electrical conductivity models. The modelling will comprise of unconstrained 3D gravity and magnetic modelling and 1D electromagnetic modelling using a suite of inversion codes developed by the University of British Columbia.
The models will be combined to form an integrated earth model from which a selection of derived products will be generated. These products will include 3D surfaces defining intersecting regions of anomalous physical property values of significance to mineral exploration. The resulting models and model derivatives will be available for download in different formats.
In addition to the digital model products mentioned above, visualization of the results will be possible using downloadable 3D PDF scenes of different parts of the QUEST project area. This will enable more widespread communication and understanding of the surveys and results.
The available products can be directly employed in regional exploration to target prospective ground based on different exploration criteria.
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