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Rio Grande Resources Advances District-Scale Gold-Silver Target Definition at its Winston Project Through Structural Mapping of Multiple Vein Corridor Systems
Phase 2 Sampling and Mapping Program Identifies Extensive Vein Corridors, Structural Intersections, and Widespread Epithermal Textures Ahead of Planned Phase
About this update from Rio Grande Resources Ltd
[{"type":"text","content":" Phase 2 Sampling and Mapping Program Identifies Extensive Vein Corridors, Structural Intersections, and Widespread Epithermal Textures Ahead of Planned Phase 1 Drill Program VANCOUVER, BC / ACCESS Newswire / May 21, 2026 / Rio Grande Resources Ltd. (CSE:RGR) (OTCQB:RGRLF) (\"Rio Grande\" or \"RIO\" the \"Company\"), is pleased to announce completion of its Phase 2 field sampling and structural mapping program at the Winston Gold-Silver Project (\"Winston\" or the \"Project\"), located in the Black Range Mountains of Sierra County, New Mexico. The program was completed by Dahrouge Geological Consulting USA Ltd. (\"Dahrouge\") and included extensive structural mapping and surface sampling designed to refine the Company's geological understanding of mineralized vein trends across the property ahead of its planned Phase 1 drill program. During the seven-day program conducted the second week of May 2026 (see News release May 06, 2026), Dahrouge collected 75 rock chip samples and 5 channel samples, representing an additional 16 individual samples, for a total of 91 individual samples submitted for analysis. The program's extensive structural mapping, represented by 307 new data points, has significantly enhanced the Company's understanding of mineralized vein trends and interpreted corridors throughout the Winston claim block. The structural dataset includes mapped vein orientations, mineralization characteristics, textural observations, and structural measurements are expected to play an important role in refining and prioritizing drill targets for the Company's planned Phase 1 drill program. Highlights include: 91 individual samples collected, including rock chip and channel samples 307 new structural data points collected across multiple target areas Multiple steeply dipping vein corridors and structural intersections identified Mapping supports continuity of interpreted mineralized trends between Poverty Creek, Highway 59, Ivanhoe-Emporia, and Little Granite. Epithermal quartz textures observed across several target areas, including bladed quartz, drusy quartz, comb quartz, amethyst, colloform banding, and vuggy textures Jason Barnard, CEO of Rio Grande Resources, commented: \"This second phase field program has significantly advanced our understanding of the Winston Project and further strengthened our confidence in the scale of...