Tailings Production18 Jan 2022 14:47
RNS from 12-Jan-2022 regarding mine tailings at OMCO property states "In 2021 extensive gold tailings heaps at the abandoned OMCO Mine site on the Olympic Gold project were identified. It quickly became apparent that this material had only previously been subjected to a simple flotation process, many decades ago, and that reprocessing these tailings via leaching would represent an excellent opportunity."
GWMO Cash: £1.7m @12-Jan-2022 (unaudited)
OMCO Tailing Statistics: @RNS 12-Jan-2022
OMCO Tailing volume = 25,000 m^3 to 31,000 m^3
OMCO tailings grade = 1.25g/t
Weigh crushed rock/m^3 = 1.6t/m^3 up to 1.8t/m^3
g/t gold to Ounces = 31.1g/ounce
OMCO implied max available gold = 1,600 to 1,994 ounces @1.6t/m^3
MJ Tailing Statistics: @GWMO presentation Sept-2021 "A summer 2021 field trip revealed that the spoil heaps are materially more extensive than previously calculated, with 51 heaps in total, potentially covering 14,000 m² (previously 38 heaps covering 5,000 m²)"
Estimated Tailings = 12kt (RNS 15-Oct-20) for 5,000m^2 now 14,000m^2 implies 33.6kt ore
Estimated grade = 2.28g/t gold (RNS 15-Oct-20)
MJ implied max available gold = 2,460 ounces
Commentary: The viability assessment of any future tailing processing would need to reflect a reduced yield dependent on processing route taken and after both CAPEX and OPEX costs have been considered for processing plant. It should also be noted that once funded this plant is then available for processing known tailings at MJ and any future ore mined at GWMO licences. GWMO have already stated that they would now pursue this route using a debt facility hence why they are looking to conclude a JORC resource for tailings so the debt can be secured once a business case has been completed.
This is still early days, but GWMO is indicating that they have sufficient confidence as "Work is underway on a definitive plan, with a view to initiating a development project as early as possible in 2022" other RNS hints include:
(1) commission further process design to include a leach pad to improve on the prior 50% gold recovery via gravity separation alone (RNS Apr-2021)
(2) proceed to the Business Case stage and raise debt to fund the tailings processing facility CAPEX/OPEX
(3) commit to building a 14km access road to facilitate tailing ore extraction and further drilling
ATB APR