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Snapshot
- Asset Type Open pit and underground deposit
- Stage Near-term development
- Key Metals Copper, zinc, silver
- Location Andalucía, Spain
- Ownership 100%
San Dionisio is a deposit located immediately west of the Cerro Colorado open pit. Historically, portions of the deposit were mined using both open pit and underground methods to extract copper-rich stockwork and polymetallic massive sulphide ore.
Atalaya completed an extensive drilling campaign from 2015-2021, in order to verify historical data and support a new independent resource estimate, which includes open pit and underground areas and two types of mineralisation – copper stockwork and polymetallic.
The open pit resource at San Dionisio has the potential to be mined as a pit extension of the operating Cerro Colorado deposit, subject to the relocation of certain infrastructure and receipt of final permits, with material processed at Riotinto’s existing 15 Mtpa plant.
As a result of its resource grade being higher than Cerro Colorado, San Dionisio has the potential to provide an uplift to Riotinto copper production by increasing the blended head grade.
RESERVES & RESOURCES
| Grade | Contained Metal | ||||||
| Tonnage | Cu | Zn | Pb | Cu | Zn | Pb | |
| Mt | Mt | Mt | Mt | ||||
| San Dionisio Open Pit | |||||||
| 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 |
| San Dionisio Underground | |||||||
| 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 |
Scroll horizontally on the table to see more data.
Unless otherwise noted, all scientific and technical information relating to Proyecto Riotinto is based on and derived from a technical report entitled “Technical Report On the Riotinto Copper Project” dated September 2022, prepared by Alan C. Noble, P.E. of Ore Reserves Engineering, in association with Monica Barrero Bouza, EurGeol, and Jay T Pickarts, P.E., Tetra Tech (the “Riotinto 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 Riotinto Technical Report and reference should be made to the full details of the Riotinto Technical Report which is filed under the Company’s corporate profile on SEDAR at www.sedar.com and on its website.