Integration of airborne (SkyTEM) and ground (Dias) large-volume electrical survey data for delineation of new deposits

The study is a result of integrated interpretation of SkyTEM data collected in 2017 and Dias ground data, collected in 2018 as a follow-up survey. The integrated interpretation is a result of collaboration between Aurora Minerals Group of Kazakhstan and Canadian-based Promiseland exploration, Ltd. Analysis and inversions of SkyTEM data resulted in successful discovery of a new gold-bearing deposit with Au contents up to 10 g/t as well as delineation of four new areas with potential for gold-bearing mineralization, which were further followed up by Dias ground 3D DC/IP surveys. The main challenges in the application of electrical methods were low contents of sulphides in mineralized zones, which result in weak EM anomalies, which however yield high apparent chargeability values (not detectable directly by airborne surveys). Another challenges were presence of highly conductive overburden, limiting penetration of airborne EM sygnal as well as extremely large ground data-sets due to 3D multi-electrode configurations. The challenges were met by using state of the art 3D inversions of ground DC/IP data run on a dedicated server, which resulted in 7 new drill-targets subject to upcoming 2019 drilling operations.