お知らせ • Apr 26
Endeavour Mining plc Announces Definitive Feasibility Study Results for Assafou Project
Endeavour Mining plc announced the results of the Definitive Feasibility Study for the Assafou-Dibibango project on the Tanda-Iguela property in Côte d’Ivoire. Definitive Feasibility Study confirms Assafou's potential to become a cornerstone asset for Endeavour highlighting: 320kozpa production at AISC of $1,026/oz over first 8 years. 16-year mine life based on P&P reserves of 4.4Moz (77.4Mt at 1.76g/t); M&I resources of 5.0Moz (80.1Mt at 1.93g/t). Robust project economics with after-tax NPV(5%) of $2,059 million and 28% IRR at a gold price of $2,500/oz, increasing to $5,113 million and 55% at a gold price of $4,000/oz. Upfront capital of $1,061 million based on a scalable 5Mtpa design nameplate capacity gravity /CIL processing plant; increased upfront capital reflects changes to site infrastructure, plant optimisations to de-risk ramp-up and to enable seamless plant expansion in the future. Significant exploration potential with over 20 highly prospective targets defined: Assafou deposit (5.0Moz M&I resource) mineralisation is open along strike and at depth; Pala Trend 3 (0.2Moz maiden M&I resource) satellite located 1km away is mineralised from surface. Assafou is the first discovery in a highly prospective and underexplored belt. Early works launched including long-lead orders, detailed engineering and design, and key tenders. Final investment decision targeted before end-2026, with subsequent 24 – 30 month construction. Assafou underpins the Group’s sector-leading organic growth outlook to 1.5Moz, at first quartile AISC, by 2030. Inferred Resources: 1.9Mt at 2.00g/t for 122koz. The Assafou deposit mineralisation extends from surface to depths in excess of 300 metres and is amenable to conventional open-pit, drill and blast, mining. The mine planning, resource and cost estimation for the DFS is based on a contract mining operation with a maximum mining capacity of 53.0 Mt per year, that is expected to be achieved 5 months after the commencement of mining. Mining capacity is expected to exceed processing capacity in order to accumulate stockpiles to allow high grade material to be preferentially processed early in the mine plan. During the pre-commercial production period approximately 49.3 Mt of pre-stripping is expected to support an accelerated production ramp up. Ore mining is expected to occur in 15-metre benches and 6.0 x 2.5-metre flitches in fresh rock, while waste is expected to be mined in 5-metre flitches. Diesel excavators and dump trucks will be used for loading and haulage, with a contractor fleet expected to comprise of 300-tonne class face excavators for waste mining, and 150-tonne class excavators for ore mining. Ore will be processed via a 5.0 Mtpa gravity /carbon-in-leach processing plant. Over the life of mine, the plant will be fed with approximately 88% fresh ore and 12% oxide and transitional ore. The comminution circuit is expected to comprise of two-stage crushing followed by a high-pressure grinding roll and a ball milling circuit. A primary gyratory crusher will crush ore to a coarse crush size, followed by dual secondary cone crushers. A live primary crushed ore stockpile will provide a buffer storage of primary crushed ore, with reclaim to feed the secondary crushing unit. Ore will then be fed through the high-pressure grinding roll circuit that feeds the ball mill. The ball mill will mill the ore to 80% passing 106µm (microns). The milled ore will pass through a gravity circuit comprising two Knelson concentrators for separation and recovery of coarse free gold, to produce a gravity concentrate for cyanidation and electrowinning that can be smelted to produce gold doré. High gravity recovery of approximately 70% is estimated. Coarse feed is returned to the ball mill while screened cyclone overflow is passed via the leach feed thickener to a CIL circuit containing one pre-leach tank and six CIL tanks, in series, for leaching and absorption. Leach residence time will be approximately 36 hours. Following leaching and absorption, gold will be recovered from activated carbon by elution, electrowinning, and gold smelting to produce gold doré. Extensive multiphase metallurgical test work has demonstrated that ore from the Assafou deposit contains free-milling gold, with a high proportion of gravity recoverable gold, that is amenable to cyanidation. The majority of the remaining gold has a high leach extraction potential resulting in an overall gold recovery rate of 94% over the life of mine. Mining operating costs, which are based on Third Quarter 2025 estimates, were prepared by Endeavour, are based on a contractor mining model. Process operating cost estimates were prepared by Lycopodium Minerals Canada Ltd, who have successfully supported Endeavour through five engineering and construction projects in West Africa over the last twelve years. General and Administration cost estimates were also prepared by Endeavour, as summarised in the table below. Open Pit Mining and Rehandling: $4.11/t mined. Processing: $14.38/t processed. G&A: $4.48/t processed. Operating costs have been based on a delivered diesel price of $1.13 per litre and are in line with current local pricing and, therefore do not reflect any potential pricing impact from current hostilities in the Middle East. Power will be sourced from the grid supplying 90kV to site via a ring main system providing power from two different parts of the power grid to increase reliability with an assumed grid availability of 90% and power costs estimated at $0.13/kWh.