Rio Grande Resources Announces the Successful Completion of Sampling and Field Campaign at the Winston Gold-Silver Project
Rio Grande Resources Announces the Successful Completion of
Sampling and Field Campaign at the Winston Gold-Silver Project
VANCOUVER, British Columbia, April 07 , 202 5 – Rio Grande Resources Ltd. (CSE: RGR,
OTCPINK: RGR LF) ( “Rio Grande ” or “RIO” the “Company”), is pleased to announce it has
successfully completed its exploration and sampling program conducted at the Winston Gold-Silver
Project (" Winston" or the " Project") located the Black Range Mountains of Sierra County, New
Mexico. The recent field campaign, conducted from March 24–28, 2025, collected 57 samples to be
analyzed, and further, provides promising geological insights to advance the Company's
understanding of the high-grade epithermal vein system.
Exploration Highlights:
• Mineralized shoots were identified along bends in vein strike and are associated with ginguro
banded vein phases containing dark gray sulphosalts and chalcopyrite, indicative of high-
grade precious metal potential. This mineralization style is shown to be associated with
economic gold and silver grades, particularly in epithermal or transitional vein systems. The
presence of sulphosalts strongly suggests significant silver enrichment, while ginguro
textures point to episodic high-grade deposition.
• Surface mapping confirmed continuous vein strike lengths of several hundred meters to over
1 kilometer, with evidence that the precious metal horizon remains intact at depth despite
post-mineral fault offsets.
• A 3D geological model is under development, integrating quartz textures, mineral
paragenesis, alteration, and geochemistry to target the precious metal horizon of the vein
system.
Jason Barnard, President and CEO of Rio Grande , comments: “The findings from our March field
program at the Winston Project underscore the exceptional potential of this district. The continuity of
high-grade vein structures, combined with the geological indicators of preserved mineralization at
depth, reinforces our confidence in the Project’s ability to host significant gold-silver resources. Our
team is now focused on integrating these results into a robust 3D model to guide our next phase of
exploration, including the prospect of future targeted drilling. With gold and silver markets remaining
strong, we are committed to advancing Winston strategically and efficiently to unlock value for our
shareholders. "
Figure1. Project Sampling Map; Recent Locations are Indicated by Yellow Triangles
Dr. Michael Feinstein, PhD, CPG, the Company's Qualified Person, notes: "The Winston Project
exhibits classic low-to-intermediate sulfidation epithermal vein characteristics. Mineralization is
controlled by structural complexities such as vein bends, dilation zones, and through a depth
transition into the precious metal horizon, indicated by the development of sulphide-rich banding,
sulphide breccias, and elevated metals content. The preservation of high-level quartz textures and
the strike continuity of veins at surface suggest robust potential for ore-grade material at depth. Our
ongoing work aims to refine drill targets based upon geochemistry, quartz textures, and alteration
vectoring in combination with a structural reconstruction to pre-fault vein geometry.
Next Steps
The Company has submitted all 57 samples from the March program to ALS Global Laboratories for
gold (fire assay) and multi-element (ICP-MS) analysis, with results expected to be released in the
coming weeks. These assays, combined with ongoing 3D modeling, will focus on the Paymaster
Fault Zone and associated veins, which will form the foundation for drill targeting and be used to
prioritize follow-up sampling programs for the next phase of exploration.
Consulting Agreements
Rio Grande would like to announce that it has entered into two arms’ length business and
consulting service agreements. The first consulting agreement (the “First Agreement”), dated April
3, 2025, is for geological advisory services over a six-month term. The services include geological
data processing and assay analysis, software mapping and modelling, administrative tasks
including documentation review and preparation. The fee for these services is $3,750 USD per
quarter in arrears, payable in common shares of the Company at a price per share equal to the 3-
day VWAP on the day prior to issuance.
Further, the Company would like to also announce it has entered into a second consulting
agreement (the “Second Agreement”), dated April 7, 2025, which includes business, operational,
and financial advisory services over a 12-month term. The fee for these services is $12,500 CND
per month, payable quarterly in arrears in cash or common shares at the sole election of Company.
If the Company elects to pay in common shares, the number of common shares issued will be
calculated equal to the 3-day VWAP on the day prior to issuance. Pursuant to Second Agreement,
The Company has also granted 833,333 Restricted Share Units (the "RSUs") valued at $0.06 per
RSU valued at $50,000 in accordance with the Company’s Omnibus Long-Term Incentive Plan (the
“Plan”) dated December 20, 2024, and the policies of the Canadian Securities Exchange (“CSE”).
The RSUs shall vest on the date that is twelve (12) months from the date of grant.
All share issuances are subject to a four-month and one day statutory hold period and final
approval by the CSE.
Qualified Person
Technical information in this news release has been reviewed and approved by Michael Feinstein,
PhD, CPG, who is a Qualified Person as identified by Canadian National Instrument 43-101
Standards of Disclosure for Mineral Projects.
About Rio Grande Resources
Rio Grande Resources (CSE:RGR) is a burgeoning mineral exploration company focused on unlocking
the high-grade gold and silver potential within its 3,000-acre drill-ready property in the Black Range
of Sierra County, New Mexico. The company holds 100% interest in the Winston project group, which
includes the 2 patented historic Ivanhoe & Emporia Claims, and Little Granite mines, all known for
their past production of high- grade precious metals. Rio Grande Resources is led by a team of
experienced professionals with expertise in mineral exploration and development, who are targeting
large-scale precious metal discoveries within the property’s well -documented low -sulfidation
epithermal setting. To view the company fact sheet and corporate presentation please visit our
website at www.riogranderesources.ca
Contact and Information
Company
Jason Barnard, President, CEO and Director
(604) 767-6598
Investor Relations Contact:
Lucas A. Zimmerman & Ian Scargill
MZ Group - MZ North America
(262) 357-2918
www.mzgroup.us
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