Tinka highlights exploration progress at Ayawilca and Silvia projects

Vancouver, British Columbia--(Newsfile Corp. - May 20, 2026) - Tinka Resources Limited   (TSXV: TK) (OTCQX: TKRFF)  (" Tinka " or the " Company ") is pleased to provide an exploration update on exploration at the Ayawilca zinc-silver-tin and Silvia copper-gold projects in central Peru. Silvia Copper-Gold Project: A magnetotellurics (MT) ground geophysical survey will commence by the end of May 2026 covering a 4 km 2 area targeting several copper-gold skarn and porphyry targets at the Silvia NW area including Area A (4 holes drilled Q4 2025) and Areas B and C (not previously drilled). The MT survey is designed to highlight deep conductive zones caused by sulphides associated with copper-gold skarn and/or porphyry mineralization.

The survey is expected to be completed early July. Initial drill holes at Silvia NW in Q4 2025 intersected encouraging skarn-hosted copper-gold mineralization which included 15.1 metres @ 0.17% copper + 0.26 g/t gold from 18.5 metres depth in hole S25-001, and 23.2 metres @ 0.20% copper + 0.05 g/t gold from 231.8 metres depth in hole S25-004 (see news release Feb 26, 2026 ). Ayawilca Zinc-Silver Project: Tinka has completed a revised interpretation of the geological and structural controls within the main zones at Ayawilca.

Several high-grade silver veins have been interpreted from drill hole intercepts and incorporated into the 3D geological model, veins that were not included in the 2024 mineral resource estimation. The Company is now advancing a detailed prioritization of drill targets for the upcoming ~5,000 metre drill program at Ayawilca, to focus on high-grade areas of silver and zinc including resource conversion and extension. The Colquipucro silver deposit, 2 km from Ayawilca, is a potential open pit silver resource.

Colquipucro, which was last reviewed in 2016, is currently undergoing a detailed internal re-evaluation including consideration for inclusion in future resource updates and economic studies. Dr. Graham Carman,