Rio Grande Resources is a gold and silver exploration company advancing its 100%-owned Winston Gold-Silver Project or the “Winston Group of Properties”. The ~3,000-acre project encompasses three past-producing high-grade gold and silver mines; the patented Ivanhoe and Emporia mines, together with the Little Granite claims, and also includes Poverty Creek Project, located in the historical Chloride Mining District of the Black Range Mountains in Sierra County, New Mexico, approximately 45 miles northwest of Truth or Consequences. With a rich history of high-grade production, the Chloride Mining District remains one of New Mexico’s most compelling precious metals districts.
Rio Grande is reinterpreting the Winston Group of Properties’ historical data through a modern exploration lens. By integrating historical datasets with contemporary structural geology, detailed surface mapping, geochemistry and modern airborne geophysics, the Company is identifying high-confidence exploration targets with the objective of revealing the broader district-scale potential of Winston. The Company believes today’s exploration technologies provide the opportunity to uncover what has been waiting generations to be discovered, and redefining the potential of this prolific precious metals district.
Including on both patented and unpatented claims
The area was a past major producer with a current strong potential for district-scale discovery
Strong macro-economic trends has driven gold to all time highs in 2025 and silver to levels it hasn’t seen since the 1908’s
The mineralization is of the well-documented epithermal type (close to the surface) within the Paymaster Fault, a structural trend known for historic gold deposits
High grade deposits of silver and gold were mined over 100 years ago, but ceased due to the decline in the price of silver and gold; little or no modern exploration has occurred since
Samples have returned 66.5g/t au and 4,610 g/t ag in 2021 within the main geological feature, the Rio Grande Rift, which currently hosts several past and present silver mines
More than a century of mining established high-grade gold and silver across multiple vein systems. Today, Rio Grande is applying modern sampling, structural mapping, historical data and airborne geophysics to connect the historical mines with emerging targets such as Poverty Creek.
Three historical mines. One emerging district. Multiple targets. One clear focus: discovery.
Ivanhoe, Emporia and Little Granite with over 100 years of high-grade gold and silver production.
Located along the Paymaster Fault within the Rio Grande Rift, a proven control on mineralization.
Recent sampling confirms multiple high-grade zones with potential for subsurface continuity.
Mapping, sampling, geophysics and historical data are advancing Phase 1 drill targeting.
Emerging high-grade target south of the historical mine areas. Recent sampling and mapping have identified multiple mineralized structures across an interpreted ~2.0 km corridor, supporting Phase 1 drill targeting.
Past-producing gold-silver mines with documented underground development and high-grade historical mineralization. These claims form a core part of Winston’s historical mining district story.
Past-producing gold mine with high-grade results and historical drilling. Shallow workings and historical drill intercepts support additional exploration along strike and at depth.