Orvana Announces the Restart of Its Don Mario Plant IN Bolivia
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For Immediate Release TSX:ORV
Date: December 17, 2025 #20-2025
ORVANA ANNOUNCES THE RESTART OF ITS DON MARIO PLANT IN BOLIVIA
TORONTO, ONTARIO, December 17, 2025 - Orvana Minerals Corp. (TSX:ORV) (the “Company” or
“Orvana”) is pleased to announce the initiation of a phased restart of its Don Mario processing plant in
Bolivia.
Juan Gavidia, Chief Executive Officer of Orvana, commented:
"The restart of the Don Mario plant represents an important milestone for Orvana as we advance the
commissioning of our expanded processing facilities. Our focus remains on executing a disciplined and
phased start -up designed to manage commissioning risk, v alidate plant performance and position the
operation for a controlled ramp-up in 2026."
Orvana’s Bolivian subsidiary, Empresa Minera Paitití S.A. (“EMIPA”), has commenced the initial phase of
the plant restart, with the comminution and thickening circuits brought online to supply feed to the Gold-
Silver circuit. These circuits are expected to undergo performance verification through mid-January 2026.
The copper circuit, which forms part of the Don Mario plant expansion, is scheduled to be brought online
in the second half of January 2026, followed by a controlled ramp-up of all circuits from February through
April 2026.
The Don Mario plant expansion includes:
(i) the installation of new circuits for copper oxide processing, including acid leaching, filtration,
solvent extraction and electrowinning to produce copper cathodes;
(ii) enhancements to the Gold-Silver and detox circuits to improve throughput and technological
performance;
(iii) a comprehensive overhaul of pre-existing comminution and thickening circuits; and
(iv) business-readiness initiatives, including upgrades to power generation, laboratories,
warehouses and workshops, as well as recruitment and training of personnel.
Concurrent with commissioning activities, EMIPA is conducting final on-site pilot testing. Upon completion,
the pilot testing, together with existing metallurgical data, is expected to allow the Company to update its
metal production estimates derived from processing the oxide stockpiles at Don Mario. The Company
expects to provide updated information once testing results have been validated.
ABOUT ORVANA – Orvana is a multi-mine gold-copper-silver company. Orvana’s assets consist of the
producing Orovalle operation in northern Spain; the Don Mario operation in Bolivia; and the Taguas
property located in Argentina. Additional information is available at Orvana’s website (www.orvana.com).
For further information please contact:
Nuria Menéndez
Chief Financial Officer
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Cautionary Statements – Forward-Looking Information
This news release contains forward -looking information within the meaning of applicable Canadian
securities laws. Forward -looking information includes, but is not limited to, statements regarding the
phased restart, commissioning, ramp-up and timing of bringing the Don Mario plant circuits into operation,
the completion and outcomes of pilot testing, and the timing of potential updates to production estimates.
Forward-looking information is based on management’s current expectations and assumptions, including
assumptions related to commissioning schedules, equipment performance, operational readiness, the
absence of material disruptions , and those described in the Company’s Management’s Discussion and
Analysis for the year ended September 30, 2025. Such information is subject to known and unknown risks
and uncertainties that may cause actual results to differ materially, including risks related to commissioning
and ramp -up of new process circuits, operational performance, metallurgical results, supply chain
constraints, permitting, regulatory matters, political and economic conditions in Bolivia, and other risks
described in the Company’s public disclosure documents available on SEDAR+ at www.sedarplus.ca.
Readers are cautioned not to place undue reliance on forward-looking information. Orvana undertakes no
obligation to update such information except as required by applicable law.