Kairos Minerals to announced that a comprehensive technical review of its Mt York Gold Project in WA's Pilbara has identified potential to significantly increase the 873,500oz resource1. The review found that the existing resource was limited by drilling to a depth of 150-200m along the entire deposit, where it remained open over its strike length of 3.4 km. The review also identified mineralisation outside the current resource that was intersected during the November-December 2021 drilling programme, especially at `The Gap' Prospect where the company announced stellar results of 49m @ 1.75 gpt Au from 135m including 19m @ 3.29 gpt Au from 153m. The review found the deposit was constrained only by drilling within the individual deposits
and at depth, not by geological or mineralisation factors. The Kairos technical team met with Auralia Mining Consulting representatives who completed the 2020 resource estimation and provided optimal pit shells, and Como Engineers who provided early-stage advice on metallurgical, process and mechanical engineering works for the Mt York Gold Project in 2020-2021. Both companies concluded that there were no technical impediments to developing the project to the next stage,
whether that will be a scoping-level study or a feasibility study. Auralia and Como both recommended further drilling as the next step in developing the project. The Mt York drilling database, including all 2021 drilling results, was imported into LeapfrogTM software and a geological model built. Various grade shell models of the mineralisation were built as part of the technical assessment independent of the Kairos wireframes that were used in the 2020 resource estimate. The Leapfrog- generated grade shells at a 0.5 gpt Au cutoff were compared to these wireframes and sectional slices through the entire 3,400m of the deposit were made. The wireframes and grade shells compare well except where additional drilling has been undertaken since the resource estimate ie Examination by the technical team of holes KMYD013A and KMYD014 show that the gold mineralisation is associated with significant magnetite, pyrrhotite, pyrite and minor arsenopyrite. The core shows obvious signs of folding and may back-up the team's view that the deposit is controlled by fold structures. The magnetite may well be a hydrothermal alteration rather than a primary magnetite associated with a Banded Iron Formation or BIF. The technical team also found the mixture of oxide phases and sulphide phases to be an interesting factor sometimes seen in large gold systems. It may be inferred that the mixing of oxidised and reduced fluids during gold mineralisation has occurred. What became apparent during the technical assessment of the Mt York Gold Project was that optimal pit shells that were constructed by Auralia largely bottomed-out on the drilling data inferring that more data was required below the current optimal shell. Inspection of gold grade intercepts near the optimal shell bases suggest that there is indeed good reason to continue to drill the deposits at depth and to particularly focus on the structural controls on the gold mineralising shoots to better target the higher-grade mineralisation at depth.