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Reserves & Resources
| Grade | Contained Metal | |||||||||||
| Asset | Ownership | Tonnage | Cu | Zn | Pb | Au | Ag | Cu | Zn | Pb | Au | Ag |
| Mt | g/t | g/t | Mt | Mt | Mt | Moz | Moz | |||||
| Proyecto Riotinto – Cerro Colorado | 100% | |||||||||||
| Proven & Probable Reserves | 132.0 | 0.37% | – | – | 0.49 | – | – | – | – | |||
| Measured & Indicated Resources | 156.6 | 0.37% | 0.15% | 0.03% | – | – | 0.58 | 0.23 | 0.05 | – | – | |
| Inferred | 4.2 | 0.40% | 0.15% | 0.04% | – | – | 0.02 | 0.01 | 0.00 | – | – | |
| Total Resources | 160.8 | 0.37% | 0.15% | 0.03% | – | – | 0.60 | 0.24 | 0.05 | – | – | |
| Proyecto Riotinto – San Dionisio Open Pit | 100% | |||||||||||
| Proven & Probable Reserves | – | – | – | – | – | – | – | – | – | – | – | |
| Measured & Indicated Resources | 56.1 | 0.91% | 1.14% | 0.23% | – | – | 0.51 | 0.64 | 0.13 | – | – | |
| Inferred | 0.8 | 0.78% | 0.55% | 0.23% | – | – | 0.01 | 0.00 | 0.00 | – | – | |
| Total Resources | 56.9 | 0.91% | 1.13% | 0.23% | – | – | 0.52 | 0.64 | 0.13 | – | – | |
| Proyecto Riotinto – San Dionisio Underground | 100% | |||||||||||
| Proven & Probable Reserves | – | – | – | – | – | – | – | – | – | – | – | |
| Measured & Indicated Resources | – | – | – | – | – | – | – | – | – | – | – | |
| Inferred | 12.4 | 1.01% | 2.54% | 0.62% | – | – | 0.12 | 0.31 | 0.08 | – | – | |
| Total Resources | 12.4 | 1.01% | 2.54% | 0.62% | – | – | 0.12 | 0.31 | 0.08 | – | – | |
| Proyecto Riotinto – San Antonio | 100% | |||||||||||
| Proven & Probable Reserves | – | – | – | – | – | – | – | – | – | – | – | |
| Measured & Indicated Resources | – | – | – | – | – | – | – | – | – | – | – | |
| Inferred | 11.8 | 1.32% | 1.79% | 0.99% | – | – | 0.16 | 0.21 | 0.12 | – | – | |
| Total Resources | 11.8 | 1.32% | 1.79% | 0.99% | – | – | 0.16 | 0.21 | 0.12 | – | – | |
| Proyecto Masa Valverde – Masa Valverde | 100% | |||||||||||
| Proven & Probable Reserves | – | – | – | – | – | – | – | – | – | – | – | |
| Measured & Indicated Resources | 16.9 | 0.66% | 1.55% | 0.64% | 0.55 | 27 | 0.11 | 0.26 | 0.11 | 0.30 | 14.67 | |
| Inferred | 73.4 | 0.61% | 1.24% | 0.61% | 0.62 | 30 | 0.45 | 0.91 | 0.45 | 1.46 | 70.84 | |
| Total Resources | 90.3 | 0.62% | 1.30% | 0.62% | 0.61 | 29 | 0.56 | 1.17 | 0.56 | 1.76 | 85.52 | |
| Proyecto Masa Valverde – Majadales | 100% | |||||||||||
| Proven & Probable Reserves | – | – | – | – | – | – | – | – | – | – | – | |
| Measured & Indicated Resources | – | – | – | – | – | – | – | – | – | – | – | |
| Inferred | 3.1 | 0.94% | 3.08% | 1.43% | 0.32 | 54 | 0.03 | 0.09 | 0.04 | 0.03 | 5.34 | |
| Total Resources | 3.1 | 0.94% | 3.08% | 1.43% | 0.32 | 54 | 0.03 | 0.09 | 0.04 | 0.03 | 5.34 | |
| Proyecto Touro | Up to 80% | |||||||||||
| Proven & Probable Reserves | 90.9 | 0.43% | – | – | – | – | 0.39 | – | – | – | – | |
| Measured & Indicated Resources | 129.9 | 0.39% | – | – | – | – | 0.51 | – | – | – | – | |
| Inferred | 46.5 | 0.37% | – | – | – | – | 0.17 | – | – | – | – | |
| Total Resources | 176.4 | 0.38% | – | – | – | – | 0.68 | – | – | – | – | |
| Proyecto Ossa Morena – Alconchel (Historical) | 99.9% | |||||||||||
| Proven & Probable Reserves | – | – | – | – | – | – | – | – | – | – | – | |
| Measured & Indicated Resources | 7.8 | 0.66% | – | – | 0.17 | – | 0.05 | – | – | 0.04 | – | |
| Inferred | 15.0 | 0.47% | – | – | 0.14 | – | 0.07 | – | – | 0.07 | – | |
| Total Resources | 22.8 | 0.53% | – | – | 0.15 | – | 0.12 | – | – | 0.11 | – | |
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Notes
The Measured and Indicated Mineral Resources are inclusive of those Mineral Resources modified to produce the Mineral Reserves.
Proyecto Riotinto
Unless otherwise noted, all scientific and technical information relating to Proyecto Riotinto is based on and derived from a Competent Persons Report (CPR) entitled “An Independent Competent Persons Report on the Mineral Assets of Atalaya Mining Plc” and issued on 22 November 2023, prepared by Guillermo Dante Ramírez Rodríguez (PhD, MMSA QP), Kira Johnson (MMSA QP) and Jaye Pickarts (PE, MMSA QP) of Tetra Tech, each of whom are “Qualified Persons” as defined in the Canadian National Instrument 43-101 – Standards of Disclosure for Mineral Project (“NI 43-101”). The information contained herein is subject to all of the assumptions, qualifications and procedures set out in the CPR and reference should be made to the full details of the CPR which is available on the Company’s website.
Proyecto Masa Valverde
Unless otherwise noted, all scientific and technical information relating to Proyecto Masa Valverde is based on and derived from a technical report entitled “Mineral Resource Evaluation of Proyecto Masa Valverde, Huelva Province, Spain” dated 31 March 2022, prepared by CSA Global and John Barry, M.Sc., M.B.A, P.Geo, FSEG and Galen White, B.Sc. (Hons), FAusIMM (the “PMV Technical Report”), each of whom are “Qualified Persons” as defined in the Canadian National Instrument 43-101 – Standards of Disclosure for Mineral Project (“NI 43-101”). The information contained herein is subject to all of the assumptions, qualifications and procedures set out in the PMV Technical Report and reference should be made to the full details of the PMV Technical Report which is filed under the Company’s corporate profile on SEDAR at www.sedar.com and on its website.
Proyecto Touro
Unless otherwise noted, all scientific and technical information relating to Proyecto Touro is based on and derived from a technical report entitled “Technical Report On the Mineral Resources and Reserves of the Touro Copper Project” dated April 2018, prepared by Alan C. Noble, P.E. of Ore Reserves Engineering, in association with William Rose, P.E., WLR Consulting, Inc. and Jay T Pickarts, P.E. (the “Touro Technical Report”), each of whom are “Qualified Persons” as defined in the Canadian National Instrument 43-101 – Standards of Disclosure for Mineral Project (“NI 43-101”). The information contained herein is subject to all of the assumptions, qualifications and procedures set out in the Touro Technical Report and reference should be made to the full details of the Touro Technical Report which is filed under the Company’s corporate profile on SEDAR at www.sedar.com and on its website.
Proyecto Ossa Morena
Unless otherwise noted, all scientific and technical information relating to Proyecto Ossa Morena is based on and derived from a technical report dated October 2017 which was produced for the project’s previous owner and was compliant with Canadian Securities Administrators’ National Instrument 43-101 – Standards of Disclosure for Mineral Projects (NI 43-101) at the time. As a result, the figures shown are historical estimates. A qualified person has not done sufficient work to classify the historical estimate as current mineral resources and the issuer is not treating the historical estimate as current mineral resources.