Dr. Graham Carman reports

TINKA RECEIVES AUTHORIZATION TO COMMENCE A DRILL PROGRAM AT SILVIA GOLD-COPPER PROJECT

Tinka Resources Ltd. has received a formal resolution from the Ministry of Energy and Mines in Peru allowing the company to initiate a drill program at its 100-per-cent-owned Silvia gold-copper property at any time. Silvia is located 100 kilometres south and along trend of the world-class Antamina copper mine in central Peru. The company believes that Silvia is a very prospective gold-copper target located in one of the world's best copper mining belts. There are several potential drill targets at Silvia NW covering several kilometres of strike. The mineralized outcrops at Area A have exceptional gold and copper geochemistry (up to 22 grams per tonne Au (gold) and 12 per cent Cu (copper)), and the company believes this area should be the first area drill tested. Mineralization is associated with altered intrusions and limestone skarn in a valley which has abundant shallow cover, meaning not all of the prospective zones are exposed.

Dr. Graham Carman, Tinka's president and chief executive officer, stated: "Receiving formal notification from the Peruvian authorities of this important milestone at Silvia is a big step forward for the company, as we now have a gold-copper property in our portfolio with multiple targets that can be moved forward without delay, subject only to adequate financing. Silvia provides Tinka the opportunity to move into gold and copper exploration whilst we continue with the strategic review at our flagship Ayawilca zinc-tin project. To finally have the drill permit at Silvia, after working on permitting for several years, is a great achievement by the Tinka team.

"The Silvia NW target, which covers three known areas of mineralization along a four km trend, has been significantly upgraded by Tinka since the acquisition from BHP in 2021. The property has not been drill tested. Tinka's discovery of high-grade gold-copper mineralization at Silvia NW Area A (including trench results of 46 metres at 1.9 g/t gold and 0.8 per cent copper, and 34 metres at 0.2 g/t Au and 0.4 per cent copper) represents a high-priority drill target. A diamond drill program of approximately 1,500 metres is planned for Q4 2025 with a portable drill rig, subject to appropriate funding. Further details of this initial drill program will be forthcoming."

Key highlights of the Silvia gold-copper property:

• The property was acquired 100 per cent by Tinka from BHP in 2021 for a 1-per-cent NSR (net smelter return) royalty and a one-time cash payment.
• Silvia consists of 10,906 hectares of granted exploration concessions immediately north of the Raura zinc-copper-silver mine owned by Grupo Breca.
• Exploration work has identified three areas of gold-copper mineralization at the Silvia NW target (referred to as areas A, B and C) which align on a trans-Andean northeast trend along a strike length of four kilometres.
• Gold and copper mineralization is associated with skarn alteration in intrusions hosted by Cretaceous limestone.
• Trench sampling at Area A returned results of up to 46 metres grading 1.9 grams per tonne Au and 0.8 per cent Cu in 2021.
• Area A trench samples from an area covering 500 m by 150 m returned an average grade of 0.55 g/t Au and 0.45 per cent Cu (average of 261 non-selective samples).
• Drone-based magnetics was flown at 100 m line spacing over Silvia NW with several anomalies outlined, including a large circular feature 1.5 km in diameter at Area B interpreted as a potential mineralized intrusion at depth.
• A drill permit (DIA) allowing up to 40 drill platforms covering all three target areas over approximately four square km was approved by the General Directorate of Mining (DGM) in August, 2023.
• An access agreement was signed with the local community and notarized in November, 2024.
• The initial drill program at Area A, with planned drill hole locations.
• The authorization to initiate activities was received from DGM on Aug. 12, 2025.

About Tinka Resources Ltd.

Tinka is an exploration and development company with its flagship property, being the 100-per-cent-owned Ayawilca zinc-silver-tin project in central Peru, and is also exploring the nearby Silvia copper-gold project. Mineral resources at Ayawilca include the Zinc zone which has an estimated indicated mineral resource of 28.3 million tonnes grading 5.8 per cent zinc, 16.4 g/t silver, 0.2 per cent lead and 91 g/t indium, and an inferred mineral resource of 31.2 Mt grading 4.2 per cent zinc, 14.5 g/t silver, 0.2 per cent lead and 45 g/t indium. The Tin zone at Ayawilca has an estimated indicated mineral resource of 1.4 million tonnes grading 0.72 per cent tin and an inferred mineral resource of 12.7 Mt grading 0.76 per cent tin. The company filed a National Instrument 43-101 technical report on an updated PEA for the Ayawilca project on April 15, 2024.

Dr. Graham Carman, Tinka's president and chief executive officer, has reviewed, verified and approved the technical contents of this release. Dr. Carman is a fellow of the Australasian Institute of Mining and Metallurgy, and is a qualified person as defined by National Instrument 43-101.

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