Publication Name: AEGC 2021
Authors: Andrew Fitzpatrick, Mike Whitford, Antonio Huizi
Date Published: September 2021
Number of Pages: 3
Abstract:
Nickel exploration routinely utilises electromagnetic techniques as a direct detection tool. In the Australian context, conductive regolith dominated terrains reduces the depth of penetration of electromagnetic techniques. Modelling is typically performed to determine the depth of investigation for basement conductors. These can be modelled as plates of various geometries, size, dip and conductance, leading to an infinite number of scenarios. IGO Limited has been exploring for nickel deposits in the Albany Fraser Orogeny in Western Australia at belt scale. This has generated a large number of ground electromagnetic targets to form a significant database. This paper presents an empirical approach of depth of investigation using this comprehensive EM plate database, in conjunction with a conductance grid derived from a beltscale AEM survey.