North Arunta Project, Bonita sub-project, Airborne Electro Magnetic data acquisition and processing, Final Report

Abstract

The objective of the proposed geophysical program is to increase interest in the underexplored Northern Arunta area by means of generating target areas and aid geological interpretation work using geophysical techniques not previously employed in the area. EM work is new to the area. Historically, EM work has generally only been used to delineate highly conductive bodies at depth, which are generally massive sulphide targets. ABM Resources is of the opinion that EM would also be successful in defining regional structures, bodies of increased disseminated sulphides, and variations in regolith depth, especially in areas where the surrounding stratigraphy is extremely resistive, to aid mapping of geology and further targeting for mineralised structures. Airborne EM over the Bonita project highlighted a previously unidentified regional structure, as well as thick transported cover and deep weathering in the majority of the ABM tenure. Data integration with other geophysical datasets and geochemical sampling will aid target generation and geological interpretation in the area, with further proposed work including EM data processing to remove the effects of overburden from the dataset, to help identify features in the EM data below cover.