Industria
Atico Mining Announces Completion NI 43-101 Feasibility Study for the La Plata Project in Ecuador
Key Highlights:
Fernando E. Ganoza, CEO and Director, commented, “Completion of this study is yet another important milestone that the Company has achieved this year as it provides for an important foundation upon which to continue building the La Plata project. As a next step, we have already commenced and advanced basic and detailed engineering where we continue to see significant opportunities yet to be captured.” Mr. Ganoza continued, “The current reserves and resources at the La Plata project are a good starting point, however, historic and recent exploration work performed here tells us that these areas still provide significant exploration potential. We intend to test this hypothesis in the very near future. In addition, the currently identified resources are contained in only 1.6% of the total land package, where we see tremendous opportunities for further exploration success in the regional target areas.”
Metallurgy and Processing
Metallurgical testwork has shown that the production of two concentrates provide the best economic performance for the operation, a zinc concentrate and a bulk concentrate. The testwork results are shown in Table 1 and were used in the estimation of the Mineral Reserve.
Table 1. Metallurgical Testwork Results
The process plant design for the La Plata Project is based on a conventional metallurgical flowsheet to treat sulphide ore to produce bulk copper and zinc concentrates. The flowsheet is based on metallurgical test work, industry standards and conventional unit operations.
The process plant will nominally treat 850 tonnes per day (t/d) of ore and will consist of comminution and flotation circuits. Flotation tailings will be dewatered to produce a filtered tailings for storage onsite. The figure below represents the overall flowsheet for the La Plata Project.
The key project design criteria for the process plant are listed below:
The Feasibility study proposes to construct, at a cost of US$1.6M, a 69kV transmission line for the power usage at the mine site using a new 8-kilometer connection to the power grid. Rain water will be collected from contact areas and fresh water will be pumped by pipeline from surface collection sumps. The company will also construct a filtered, stacked tailings impoundment facility to accommodate tails from the milling operations.
Mineral Resource Estimate
The Mineral Resource Estimate (“MRE”) of the La Plata volcanogenic polymetallic massive sulphide (“VMS”) project (the “Project” or “La Plata”) presented herein represents an update from the previous MRE issued in the La Mina Preliminary Economic Assessment (“PEA”) report, completed by SGS Canada Inc. (“SGS”) in March 2019.
The current MRE is based on the updated drillhole database received on March 8, 2021, which includes additional data from the 2020 and 2021 infill drilling programs completed since the previous MRE. Since the 2019 PEA, there has been significant progress in the geological understanding of the deposit due to infill drilling programs conducted on the Project. Most of the drilling was dedicated to infill drilling to convert Inferred resources to Indicated category for inclusion in this Feasibility Study (“FS”).
Table 2. La Plata Project Mineral Resource Statement as of August 1 , 2023
Mineral Reserve Estimate
The mine design and Mineral Reserve estimate were completed to a level appropriate for feasibility studies. The Mineral Reserve estimate stated herein is consistent with the CIM definitions and is suitable for public reporting. As such, the Mineral Reserves are based on Measured and Indicated Mineral Resources and do not include any Inferred Mineral Resources. The Inferred Mineral Resources contained within the mine design are treated as waste.
The Mineral Resources estimate reported below are the basis for the Mineral Reserve Estimate. Only Measured and Indicated Resources are deemed to have sufficient confidence to be used for the Mineral Reserve estimate. Indicated Resources are the basis for the estimate of Probable Mineral Reserves.
The Mineral Reserves for the La Plata Project are estimated at 2.51 Mt, at an average grade of 1.59% Cu, 2.28 g/t Au, 30.41 g/t Ag, 0.36% Pb, and 2.18% Zn, as summarized in Table 3 below.
Table 3. La Plata Project Mineral Reserve Statement as of July 5, 2023
Capital and Operating Costs
Capital and operating costs for the La Plata Project were estimated by KCA and Atico Mining, with input from G-Mining for material take-offs and Sinco for infrastructure costs. The scope of these costs includes expenditures for all mining equipment, process facilities, and infrastructure for the project. The estimated capital and operating costs are considered to have an accuracy of +/-15%, and are discussed in greater detail in this Section.
The total capital cost for the Project is US$138 million including VAT (US$121 million without VAT); all VAT is assumed to be fully refundable. The table below presents the capital requirements for the La Plata Project.
Capital Cost Summary
The total life of mine operating cost for the Project is US$91.03 per tonne of ore processed, excluding preproduction. The table below presents the operating cost requirements for the La Plata Project.
Operating Cost Summary
Mining Methods
There will be three mining methods used for stoping at La Plata. Given the amorphous shape of the deposit and the associated geotechnical conditions, the stoping methodology will change to adapt to changes in the characteristics of the deposit. The three methods are bench-and-fill (Avoca), room-and-pillar and cut-and-fill.
Avoca mining will be used where the structure is steeply dipping, wider than 2.5 meters, and the RMR is over 40; additionally, each Avoca block requires access from both ends of each block on the drilling sublevel. Bench heights are variable from 10-m to 20-m. A long hole (bench) drill will be used for drilling and the mucking will be by remote controlled scoops. This method is high productivity with low operating costs.
Drift-and-fill mining will be applied in the relatively flat parts of the deposit. Stoping is with the same equipment as mine development (jumbos, scoops, haul trucks) with breasting the faces for high productivity. Pillars of cemented rock fill (CRF) will be left to support the hangingwall and rock mass above the stope blocks. After the first stage of stoping the pillars are mined and the overlying load from the rock mass is transferred to the CRF pillars.
Cut-and-fill mining will be applied to areas where the deposit is too flat to allow for Avoca mining and too steep for room-and-pillar mining. In addition, if the RMR is less than 40 cut-and-fill mining will be used. As with drift-and-fill mining, the equipment fleet for room-and-pillar is the same as the mine development fleet. Lifts advance as breasting lifts after the initial lift which uses a pull round. The fill medium may be waste rock from mine development or CRF, depending upon local circumstances.
Project Economics and Sensitivities
The life of mine production data for the La Plata project is presented in Table 6 below.
Table 6. La Plata Production Data
The financial analysis for the base-case, which evaluates a stand-alone owner's operation and indicates an after-tax NPV at a 5% discount rate, of US$93M with an IRR of 25.1% and a payback period of 3.4 years . In this scenario the project is expected to generate US$212M pre-tax operating cash flow.
Table 7 and Table 8 below present the financial analysis for the La Plata project.
Table 7. Base Case Financial Analysis
Table 8. Sensitivity analysis to current metal prices.
Qualified Person
The definitive feasibility study was prepared by leading independent industry consultants. The Qualified Persons who prepared the June 2024 NI 43-101 Technical Report are:
The QPs have reviewed and approved the content of this news release.
The following consultants participated in the Study:
The NI 43-101 Technical Report will be filed on SEDAR+ within 45 days of this press release.
About Atico Mining Corporation
Atico is a growth-oriented Company, focused on exploring, developing and mining copper and gold projects in Latin America. The Company generates significant cash flow through the operation of the El Roble mine and is developing its high-grade La Plata VMS project in Ecuador. The Company is also pursuing additional acquisition of advanced stage opportunities. For more information, please visit www.aticomining.com.
ON BEHALF OF THE BOARD
Fernando E. Ganoza
CEO
Atico Mining Corporation
Trading symbols: TSX.V: ATY | OTC: ATCMF
Investor Relations
Igor Dutina
Tel: +1.604.633.9022
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No securities regulatory authority has either approved or disapproved of the contents of this news release. The securities being offered have not been, and will not be, registered under the United States Securities Act of 1933, as amended (the ''U.S. Securities Act''), or any state securities laws, and may not be offered or sold in the United States, or to, or for the account or benefit of, a "U.S. person" (as defined in Regulation S of the U.S. Securities Act) unless pursuant to an exemption therefrom. This press release is for information purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any securities of the Company in any jurisdiction.
Cautionary Note Regarding Forward Looking Statements
This announcement includes certain “forward-looking statements” within the meaning of Canadian securities legislation. All statements, other than statements of historical fact, included herein, without limitation the use of net proceeds, are forward-looking statements. Forward-looking statements involve various risks and uncertainties and are based on certain factors and assumptions. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. Important factors that could cause actual results to differ materially from the Company's expectations include uncertainties relating to interpretation of drill results and the geology, continuity and grade of mineral deposits; uncertainty of estimates of capital and operating costs; the need to obtain additional financing to maintain its interest in and/or explore and develop the Company's mineral projects; uncertainty of meeting anticipated program milestones for the Company's mineral projects; the world-wide economic and social impact of COVID-19 is managed and the duration and extent of the coronavirus pandemic is minimized or not long-term; disruptions related to the COVID-19 pandemic or other health and safety issues, or the responses of governments, communities, the Company and others to such pandemic or other issues; and other risks and uncertainties disclosed under the heading “Risk Factors” in the prospectus of the Company dated March 2, 2012 filed with the Canadian securities regulatory authorities on the SEDAR+ website at www.sedarplus.ca
Non-GAAP Financial Measures
This press release refers to All In Sustaining Cost (AISC) a non-GAAP financial measures which is used by the Company for project evaluation and operating performance. These measures are widely reported in the mining industry but do not have a standardized meaning and may differ from methods used by other companies with similar descriptions. The Company believes that certain investors use these non-GAAP financial measures to evaluate the Company's operations. Accordingly, non-GAAP financial measures should not be considered in isolation or as a substitute for measures of performance prepared in accordance with IFRS. Readers should refer to Non-GAAP Financial Measures in the Company's Management's Discussion and Analysis for the year ended December 31, 2023, as filed on SEDAR and as available on the Company's website for further details.
A photo accompanying this announcement is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/9b60f552-92ee-4110-94bf-f516e54f6fb6
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