MVI excels at identifying copper porphyry-related intrusives
To verify the potential for Magnetization Vector Inversion (MVI) to identify deep intrusives related to copper porphyry systems, veteran copper explorer Carl Windels has compiled several North American examples where the technique works.
Among the known deposits the geophysicist tested using the MVI method are the continent’s most famous, including Bingham Canyon in Utah and Morenci in Arizona.
“The compilation was a way to convince myself that I would have consistent results for known copper porphyries so that and I could start applying MVI to buried targets with confidence,” says Windels, a consultant who previously worked for producers such as Asarco and Texas Gulf Sulphur. “The ternary plot (UVW susceptibility) delineates variations in magnetization vector direction 6by colour and if I can map the intrusive source, then I can identify other similar features on the project.”
MVI, a feature of Geosoft’s VOXI Earth Modelling, provides a more reliable representation of subsurface geology than traditional inversion because it accounts for varying directions of magnetization. From his experimentation so far, Windels believes the technique may have the potential to age-date lithologies.
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