Centamin PLC Announces Positive Doropo Gold Project DFS

PERTH, July 18, 2024 - Centamin Plc ("Centamin" or "the Company") (LSE:CEY)(TSX:CEE

POSITIVE DEFINITIVE FEASIBILITY STUDY AT THE DOROPO GOLD PROJECT
Preparation for mining license application underway

Centamin is pleased to provide the outcome of the definitive feasibility study ("DFS") at its Doropo Gold Project ("Doropo") in north-eastern Côte d'Ivoire, including detailed project parameters and economics and an updated Mineral Reserves estimate.

MARTIN HORGAN, CEO,commented: "The results of the DFS demonstrate a robust project that meets Centamin's investment criteria. The project shows a strong first five years with production in excess of 200kozpa at an AISC below US$1,000/oz, delivering an accelerated payback on investment. The DFS has resulted in a plan with significantly lower execution risk, relative to the PFS, reflecting a reconfiguration of the project to reduce its social impact on local communities. We were pleased to receive regulatory approval of the Environmental and Social Impact Assessment and receipt of the environmental permit in June, and will shortly proceed to file the application for a mining license.

Financing options for the project are well advanced, supported by a clear roadmap for early works that will mitigate completion risks. This study underlines our confidence in Doropo's potential to become a commercially viable project, bringing substantial investment and employment opportunities to northeastern Côte d'Ivoire."

HIGHLIGHTS^[1]

DEFINITIVE FEASIBILITY STUDY SUMMARY

POST-TAX NET PRESENT VALUE (US$M) SENSITIVITY ANALYSIS

FOR FULL LIFE OF MINE SCHEDULES: (link here)

WEBCAST PRESENTATION

The Company will host a webcast presentation on Thursday, 25 July 2024 at 08.30 BST to discuss the interim results and Doropo, followed by an opportunity to ask questions.

Webcast link: https://www.lsegissuerservices.com/spark/Centamin/events/80411d15-3a8c-475a-8162-3bbcf0a2ac0e

PRINT-FRIENDLY VERSION of the announcement: www.centamin.com/media/companynews.

DOROPO GOLD PROJECT DEFINITIVE FEASIBILITY STUDY

OVERVIEW

Doropo is located in the northeast of Côte d'Ivoire, situated in the north-eastern Bounkani region between the Comoè National Park and the international border with Burkina Faso, 480km north of the capital Abidjan and 50km north of the city of Bouna.

The exploration license areas are c.1,847 km² covering thirteen gold deposits, named Souwa, Nokpa, Chegue Main, Chegue South, Tchouahinin, Kekeda, Han, Enioda, Hinda, Nare, Kilosegui, Attire and Vako. Approximately 85% of the gold deposits are concentrated within a 7km radius ("Main Resource Cluster"), with Vako and Kilosegui deposits located within an approximate 15km and 30km radius, respectively.

Geologically, Doropo lies entirely within the Tonalite-Trondhjemite-Granodiorite domain, bounded on the eastern side by the Boromo-Batie greenstone belt, in Burkina Faso, and by the Tehini-Hounde greenstone belt on the west.

MINERAL RESOURCES AND RESERVES

The DFS is based on the 2023 Mineral Resource Estimate for Doropo published in January 2024 (link to regulatory announcement here). The Mineral Reserve estimate has converted 60% of Mineral Resource ounces to Mineral Reserves.

The change in reserve tonnage is primarily due to aligning the reserve gold price applied to Doropo with the Company's long-term gold price of US$1,450/oz from US$1,500/oz in the PFS, which reduced the pit shells and designs. However, this impact was offset by an increase in grade, resulting in no change in the total contained ounces.

The grade improvement resulted from an improved understanding of the controls of mineralisation following infill drilling programme focused on converting Inferred Mineral Resources to Measured and Indicated Mineral Resources within the resource pit shells, confirming reserve pit depths and initial grade control drilling.

There is potential for additional resource conversion and further resource growth. Several exploration targets have been identified across the license holding which have the potential to increase the resource and reserve base.

Detailed Mineral Resource and Reserve notes can be found within the Endnotes.

MINING

The eight relatively shallow deposits will be mined using a conventional drill, blast, load and haul open pit operation. The basis for the DFS is a contract mining operation, mining a maximum of 28 Mtpa of material and delivering up to 4.9 Mtpa of ore to the run of mine ("ROM") pad and stockpiles annually, with variation based on the location and the combination of oxide, transition and fresh ore mined. The project plans to mine 38Mt of ore to be fed into the process plant and 188Mt of waste over the LOM. The strip ratio has increased from the PFS due to the reduction of some of the upper pit wall angles in the saprolite material near surface, a result of the increased geotechnical study work undertaken.

PROCESSING

Processing at Doropo will involve primary crushing and grinding of the mined ore, using Semi-Autogenous Grinding ("SAG") mill and ball mill in closed circuit to a target grind size (P80) of 75 microns (µm) for fresh ore and 106 µm for oxide and transition ore. A gravity circuit will recover any native/free gold, before entering the CIL circuit. The gold in the loaded carbon will be recovered by an elution circuit, using electrowinning and gold smelting to produce doré. Flowsheet development was supported by extensive DFS metallurgical test work, supplemented by the PFS results. The DFS metallurgical test work demonstrated a high level of consistency resulting in only minor process design updates from the PFS. The DFS metallurgical test work allowed for extensive optimisation and further simplification of the flowsheet by removing the shear reactor and tailings thickener, while keeping the remaining flowsheet unchanged. The change in recovery was driven by a more conservative calculation method, switching from a grade recovery curve to the use of grade bins split by material type, alongside test work indicating lower recoveries in fresh material.

INFRASTRUCTURE

Knight Piésold Consulting carried out a DFS of the site infrastructure for Doropo includingTSF, water storage/harvest dam, airstrip and haul access road.

The TSF was designed in accordance with Global Industry Standard on Tailings Management ("GISTM") and Australian National Committee on Large Dams ("ANCOLD") guidelines. The TSF will be fully lined with a geomembrane liner, leachate collection and constructed by the downstream construction method with annual raises to suit storage requirements. The TSF is designed and will be operated as a no discharge facility. The TSF will have a final capacity of 29 million cubic meters (Mm³) or 41 Mt of dry tails. Due to an improved design, it will cover a smaller total footprint area, including the basin area, of approximately 287 hectares ("ha") for the final stage facility, compared to 346 ha in the Preliminary Feasibility Study (PFS).

Doropo will utilise the Côte d'Ivoire national grid for its power supply, offering a cost and potential carbon saving relative to other options including self-generation as the tariff benefits from a mix of renewable and thermal generation with a significantportion of hydroelectric power supply.The proposed grid power supply connection for the project is via the existing Bouna substation which is approximately 55km southeast of Doropo. There will also be standby power on-site using diesel generators, for back-up power of critical process equipment and infrastructure if required. Solar power supplementation is currently being investigated to lower grid reliability and overall carbon emissions.

ENVIRONMENTAL AND SOCIAL

The environmental permit for Doropo was granted in June, following public consultation and submission of the Environmental and Social Impact Assessment ("ESIA") in Q1 2024.

The ESIA was prepared by Earth Systems and H&B Consulting working in conjunction with Centamin. Early development of information has allowed its incorporation into the DFS design and decision-making process. The ESIA shows less than 500 people would require physical resettlement, down from 2,000 to 3,000 in the PFS. Re-alignment of the TSF, water storage dam (WSD), waste rock dumps (WRD) and plant site has reduced the total mine footprint by approximately 25% and reduced impacts on adjacent villages. Overall, 2,000 ha of agricultural land could be impacted by the project development.Mine sequencing will result in a phased approach to land acquisition, compensation and livelihood restoration. Alongside progressive rehabilitation, this will minimise community and physical risks and impacts.

The project provides a valuable opportunity to boost local social and economic development with a commitment to invest 0.5% of project revenues into a community development fund.

The outer extent of Doropo is 7km from the Comoé National Park, which is a UNESCO World Heritage site. Doropois being designed to avoid adverse impacts to the park and its biodiversity, including a self-imposed stand-off of 4km to further safeguard the natural area.

COSTS

Operating Costs

Operating cost estimates for mining have been prepared by Orelogy with input from Centamin. Contract mining has been selected as the basis for all the open pit mining activities managed by Centamin's operation team,mining contractor costs were prepared by Orelogy, through a competitive bid process. Cost estimates for processing and general and administration ("G&A") costs were prepared by GR Engineering Services with input from Centamin. The reduction in mining and processing costs was driven by reduced freight and logistics expenses, as well as more competitive bids from mining contractors, as we approach the final investment decision. Key input costs used are a delivered diesel price of $1.00 per litre, unchanged from the PFS, and power costs of $0.125/kwh, slightly higher than the PFS cost of $0.113/kwh due to changes in national tariffs.

LOM Average Costs

Capital Costs

The table below presents an estimate of the initial construction CAPEX, prepared by GR Engineering Services and Knight Piésold. Centamin provided the Owner Project Cost. The DFS value represents an increase of less than 7% from the PFS, primarily due to global cost inflation over the period and minor adjustments in the bill of quantities ("BOQ"). This is an excellent result, and it is reassuring that two separate consultants (Lycopodium were used in the PFS) have independently generated similar construction capital costs, which underpins our confidence in the estimates.

The table below provides an estimate of ongoing capital commitments necessary to sustain operations over the LOM, including closure and rehabilitation costs, including bond payments. These estimates incorporate input from Knight Piésold and a closure estimate developed by Earth Systems. Sustaining capital expenditure has decreased compared to the PFS due primarily to two factors. A reduction in physical resettlement requirements, which has lowered costs over the life of the mine. Alongside increased upfront TSF construction costs, which have resulted in a greater allocation of these costs to the initial construction capital estimate.

OWNERSHIP, PERMITTING, TAXES AND ROYALTIES

Doropo is contained within the current exploration permits that were granted to Centamin's 100% owned subsidiaries, Ampella Mining Côte d'Ivoire and Ampella Mining Exploration Côte d'Ivoire.

Under the current Ivorian mining code, mining permits are subject to a 10% government free-carry ownership interest. However, for the purpose of the DFS project evaluation and disclosures included within this document, the cash flow model is reflected on a 100% project basis.

The financial model has assumed the corporate tax ("CIT") rate of 25% for the LOM. The project is expected to benefit from VAT and import duties exemption during the construction phase and until first production.

Royalties are applied to gross sales revenue, after deductions for transport and refining costs and penalties on a sliding scale depending on gold price. Please refer to the table below:

The project will support local community development through the payment of a social fund royalty of 0.5% of gross sales revenue.

PROJECT TIMELINE

NEXT STEPS

The Company completed extensive work during the DFS stage. The DFS, together with the environmental permit will form key documents in support of our submission for a mining license to the Côte d'Ivoire Government. This application is scheduled to be submitted in Q3 2024. Following the award of the mining license and conclusion of the mining convention, we will be well positioned to make a final investment decision, with project financing options already well advanced.

There is up to US$6 million identified for early works including, starting front-end engineering design ("FEED"), grade control drilling and some limited earthworks. These activities will reduce project delivery risk and potentially expedite construction timelines. The costs will be removed from the current project operating and capital costs, with early works expenditure deducted from the total construction cost, and the grade control drilling costs deducted from the mining operating budget for the first two years, ensuring no additional costs are added to the current project values.

PROJECT UPSIDE OPPORTUNITIES

There are a number of identified geological and financial opportunities with the potential to enhance to the current LOM.

ENDNOTES

Investors should be aware that the figures stated are estimates and no assurances can be given that the stated quantities of metal will be produced.

MINERAL RESOURCE AND MINERAL RESERVE NOTES

Mineral Resource Notes

Mineral Reserve Notes

QUALIFIED PERSONS

A "Qualified Person" is as defined by the National Instrument 43-101 of the Canadian Securities Administrators. The named Qualified Person(s) have verified the data disclosed, including sampling, analytical, and test data underlying the information or opinions contained in this announcement in accordance with standards appropriate to their qualifications. Each Qualified Person consents to the inclusion of the information in this document in the form and context in which it appears.

Information of a scientific or technical nature in this document, including but not limited to the Mineral Resource estimates, was prepared by and under the supervision of the Centamin Qualified Persons, Howard Bills, Centamin Group Exploration Manager, and Craig Barker, Centamin Group Mineral Resource Manager, in addition to the below independent Qualified Persons.

The following table includes the respective independent Qualified Persons, who have the sign-off responsibilities of the final NI 43-101 Technical Report. All are experts in their relevant disciplines who fulfil the requirements of being a "Qualified Person(s)" under the CIM Definition Standards.

Independent Technical Consultants

The following table includes the consultant companies that contributed to the Centamin DFS report:

ABOUT CENTAMIN

Centamin is an established gold producer, with premium listings on the London Stock Exchange and Toronto Stock Exchange. The Company's flagship asset is the Sukari Gold Mine ("Sukari"), Egypt's largest and first modern gold mine, as well as one of the world's largest producing mines. Since production began in 2009 Sukari has produced over 5 million ounces of gold, and today has 6.0Moz in gold Mineral Reserves. Through its large portfolio of exploration assets in Egypt and Côte d'Ivoire, Centamin is advancing an active pipeline of future growth prospects, including the Doropo project in Côte d'Ivoire, and has over 3,000km² of highly prospective exploration ground in Egypt's Nubian Shield.

Centamin recognises its responsibility to deliver operational and financial performance and create lasting mutual benefit for all stakeholders through good corporate citizenship, including but not limited to in 2022, achieving new safety records; commissioning of the largest hybrid solar farm for a gold mine; sustaining a +95% Egyptian workforce; and, a +60% Egyptian supply chain at Sukari.

FOR MORE INFORMATION please visit the website www.centamin.com or contact:

FORWARD-LOOKING STATEMENTS

This announcement (including information incorporated by reference) contains "forward-looking statements" and "forward-looking information" under applicable securities laws (collectively, "forward-looking statements"), including statements with respect to future financial or operating performance. Such statements include "future-oriented financial information" or "financial outlook" with respect to prospective financial performance, financial position, EBITDA, cash flows and other financial metrics that are based on assumptions about future economic conditions and courses of action. Generally, these forward-looking statements can be identified by the use of forward-looking terminology such as "believes", "expects", "expected", "budgeted", "forecasts" and "anticipates" and include production outlook, operating schedules, production profiles, expansion and expansion plans, efficiency gains, production and cost guidance, capital expenditure outlook, exploration spend and other mine plans. Although Centamin believes that the expectations reflected in such forward-looking statements are reasonable, Centamin can give no assurance that such expectations will prove to be correct. Forward-looking statements are prospective in nature and are not based on historical facts, but rather on current expectations and projections of the management of Centamin about future events and are therefore subject to known and unknown risks and uncertainties which could cause actual results to differ materially from the future results expressed or implied by the forward-looking statements. In addition, there are a number of factors that could cause actual results, performance, achievements or developments to differ materially from those expressed or implied by such forward-looking statements; the risks and uncertainties associated with direct or indirect impacts of COVID-19 or other pandemic, general business, economic, competitive, political and social uncertainties; the results of exploration activities and feasibility studies; assumptions in economic evaluations which prove to be inaccurate; currency fluctuations; changes in project parameters; future prices of gold and other metals; possible variations of ore grade or recovery rates; accidents, labour disputes and other risks of the mining industry; climatic conditions; political instability; decisions and regulatory changes enacted by governmental authorities; delays in obtaining approvals or financing or completing development or construction activities; and discovery of archaeological ruins. Financial outlook and future-ordinated financial information contained in this news release is based on assumptions about future events, including economic conditions and proposed courses of action, based on management's assessment of the relevant information currently available. Readers are cautioned that any such financial outlook or future-ordinated financial information contained or referenced herein may not be appropriate and should not be used for purposes other than those for which it is disclosed herein. The Company and its management believe that the prospective financial information has been prepared on a reasonable basis, reflecting management's best estimates and judgments at the date hereof, and represent, to the best of management's knowledge and opinion, the Company's expected course of action. However, because this information is highly subjective, it should not be relied on as necessarily indicative of future results. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such information or statements, particularly in light of the current economic climate and the significant volatility, the risks and uncertainties associated with the direct and indirect impacts of COVID-19. Forward-looking statements contained herein are made as of the date of this announcement and the Company disclaims any obligation to update any forward-looking statement, whether as a result of new information, future events or results or otherwise. Accordingly, readers should not place undue reliance on forward-looking statements.

LEI: 213800PDI9G7OUKLPV84

Company No: 109180

^[1] 100% project basis, NPV calculated as of the commencement of construction and excludes all pre-construction costs

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.

SOURCE: Centamin PLC