Mirasol Resources Provides Exploration Update on Sobek Copper-Gold Project in the Vicuña District, Chile

About this update from Mirasol Resources Ltd

Exploration season completed, including two drill holes, at the 46 South Target located just 7 km west of Filo del Sol in the Vicuña District, at the south end of Sobek Central Results from the first drill hole testing the 46 South target confirm a structurally controlled hydrothermal system with anomalous copper/gold geochemical intervals A second drill hole was completed 300 m to the south of the first hole to test directly beneath the quartz-alunite breccia for stronger near surface mineralization; assays are pending VANCOUVER, British Columbia, April 23, 2026 (GLOBE NEWSWIRE) -- Mirasol Resources Ltd. (TSX-V: MRZ) (OTC: MRZLF) (the “Company” or “Mirasol”) announces an update on the exploration and drilling at the Company’s 100%-owned Sobek Copper-Gold-Silver Project (“Sobek” or “the Project”) located 7 km west of Filo Del Sol in the Vicuña District of Chile. Two drill holes were completed this season to test the 46 South target located on the south end of Sobek Central, results from the second hole are still pending. Figure 1: Vicuña District - Sobek Property Package including the 46 South Target The first drill hole was designed to test the main structural corridor at 46 South target which resides on the southern margin of a district-scale magnetic high where both the airborne MT and magnetics surveys outlined distinct cylindrical anomalies. The ground based Deep Vectoring IP and MT geophysical survey launched late last year also defined a corresponding shallow coincident IP anomaly with strong MT-resistivity and chargeability responses. The grid-based soil survey over the area outlined a coincident, large and coherent copper-gold-moly geochemical anomaly on surface that directly overlays IP-PDP resistivity and chargeability responses from IP ground geophysics surveys (news release dated January 22, 2026). The drilling confirmed that 46 South hosts a structurally controlled hydrothermal system intersecting multiple hydrothermal breccia zones with the strongest hydrothermal response closely tied to structurally controlled breccias and fault zones, as opposed to the hypothesized lithocap environment which was expected to host a much broader distribution of alteration and mineralization. “These first drill holes at 46 South have improved our understanding of the target. Although initial assay results were modest, drilling has confirmed a structurally co...

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