Glenstar Begins Exploration Program on Its Wildhorse Property in Western Nevada

Rhea-AI Summary

Glenstar Minerals (GSTRF) has initiated an exploration program at its 900-acre Wildhorse property in Mineral County, Nevada. The program focuses on three mineralized zones: the Rattlesnake Zone, which showed polymetallic mineralization including copper, gold, silver, and antimony; the newly discovered Coca Cola Zone featuring copper oxide mineralization; and a third mining area with bedrock cut. The property, acquired through staking in early 2025, is situated along an east-west trend of porphyry-related polymetallic mineralization. Initial sampling revealed promising results, including zones containing over 1 gram per ton gold, 1% copper, and 6,100 ppm antimony. The geology consists of folded and faulted limestones, shale, and metavolcanic rocks, with a rhyolite intrusion near known mineralization. The company sees potential for discovering a large skarn system beneath surface workings.

Positive

• Initial sampling showed promising mineralization with over 1 g/t gold, 1% copper, and 6,100 ppm antimony
• Property location in favorable geological setting with three identified mineralized zones
• Skarn deposits are relatively easy to explore due to their responsiveness to electric geophysical methods
• Strategic acquisition through staking, indicating low entry costs

Negative

• Historical workings are limited and date back to 1800s-1900s with minimal modern exploration
• Large portions of the property are concealed by landslide rubble and boulder bearing gravel units
• Previous claims from 2011 were never registered with BLM, suggesting possible issues with the area
• Company is still awaiting assay results from its other project (Green Monster)

Vancouver, British Columbia--(Newsfile Corp. - June 5, 2025) - Glenstar Minerals Inc. (CSE: GSTR) (OTCQB: GSTRF) (FSE: VO20) ("Glenstar" or the "Company") announces that it has determined an exploration work program for the Company's Wildhorse property, which is comprised of 900 acres (364 hectares) in Mineral County, Nevada, commencing in early June, 2025.

The Wildhorse work program will include comprehensive focused rock chip sampling and geologic mapping of three known zones of outcropping mineralization. The results of first round sampling done during the initial phase of property identification returned robust polymetallic mineralization including copper, gold, silver and antimony (see news release dated May 8, 2025). This zone is known as the Rattlesnake Zone, which historical records indicate was previously explored underground by an incline shaft of limited extent.

Two new zones were found during the Company's claim staking that include a quartz vein stockwork zone with abundant copper mineralization. Massive copper oxide mineralization is densely spotted with black and yellow oxide minerals and cut by dark brown veinlets. Wall rocks include limestone and strongly altered porphyritic rocks. The zone is partially exposed by a small prospect pit, however, no evidence of modern sampling or other exploration activities of this zone is apparent. This occurrence is called the Coca Cola Zone and will be an early focus of the exploration program. A third zone is a larger-scale mining or prospecting area consisting of a bedrock cut and dump, and will be examined and sampled in detail as part of the current work program.

Glenstar acquired the Wildhorse property through staking in early 2025 and the regional setting was determined to be favorable due to the presence of an east-west trend of porphyry related polymetallic mineralization. The selection of the property was further guided by a compilation of data from the Anaconda archives in Laramie Wyoming and the NURE stream sediment sample data base.

Glenstar recently completed a first round drill program on its Green Monster project (see news release dated May 28, 2025) and the Company is now turning its focus on the Wildhorse project while it awaits the assay results from green Monster. The Wildhorse property is considered to be a considerable prospective exploration area for porphyry related, or direct porphyry hosted, polymetallic mineralization. The Company anticipates discovering additional zones of interest as the exploration work continues, and is optimistic that the results of initial sampling delineation of the known mineralized areas will confirm the target areas viability for further exploration work.

Project Background & Recent Exploration Work

The Wildhorse property was initially targeted after compilation of all available data, including notes of a 1975 field examination contained in the Anaconda Company archives housed at the university of Wyoming. The claims show historical workings that appear to date from the late 1800's and early 1900's. Other claim stakes that the geological team discovered on the property indicate the last time the area was staked was 2011, however, these claims were never registered with the BLM. Preliminary geological assessment of the claims, and the area in general, indicate there are a series of east dipping mineralized zones. Initial field examination of the property identified and sampled a quartz veinlet zone containing in excess of 1 gram per ton gold, 1% copper, and 6,100 ppm of antimony. It was also reported that outcropping zones also contain bismuth and tungsten >200 ppm, which points to a focused intrusive source for the epidote skarn alteration and poly-metallic system.

Several additional areas of exposed copper mineralization were located during the staking of the property. The geology of the area is complex, with strongly folded and faulted limestones, shale, and metavolcanic rocks of Paleozoic age underly the known mineralization and cover a large portion of the property claims. Importantly, an intrusive mass of rhyolite has intruded the deformed section in a position proximal to the known mineralization. Land slide rubble and boulder bearing gravel units conceal the underlying geology in the northcentral portion of the property (see news release dated May 8, 2025).

The economic opportunity at Wildhorse points to the possible discovery of a large, well mineralized skarn system under the surface workings and within the controlling north-south fault zone exposed at surface. Skarns are relatively easy to explore as they respond well to a variety of electric geophysical methods including magnetic surveys.

About Glenstar Minerals Inc.

Glenstar is a mineral exploration company with a focus on polymetallic minerals. These elements are classified as critical minerals and are essential in the manufacturing of sophisticated electronics and other vital energy technologies. The Company's mission is to leverage its knowledge and connections to explore, acquire, and develop critical mineral and energy metal properties throughout the world.

Glenstar's shares trade on the Canadian Securities Exchange (CSE) under the symbol "GSTR", on the Frankfurt Stock Exchange under the symbol "VO20", and on the Over-the-Counter market (OTCQB) in the United States under the symbol "GSTRF".

Robert Marvin, P.Geo (ONT) is the qualified person as defined by National Instrument 43-101 and is the independent consulting geologist for Glenstar Minerals Inc., who has examined the Green Monster and Wildhorse properties on the ground numerous times since 2022 and 2024 respectively; and has reviewed the geological information available from private and public sources related to the properties, and is responsible for approving the technical contents of this press release.

ON BEHALF OF THE BOARD

David Ryan
President & CEO

Further information regarding the Company can be found on SEDAR+ at www.sedarplus.ca, by visiting the Company's website www.glenstar.ca or by contacting the Company directly at 604-449-2810.

Neither Canadian Securities Exchange nor its Regulation Services Provider (as that term is defined in policies of the Canadian Securities Exchange) accepts responsibility for the adequacy or accuracy of this release.

Cautionary Statement Regarding Forward-Looking Information: Certain information contained in this news release constitutes "forward-looking information" or "forward-looking statements" (collectively, "forward- looking information"). Without limiting the foregoing, such forward-looking information includes statements regarding the process and completion of any Offering, the use of proceeds of the Offering and any statements regarding the Company's business plans, expectations and objectives. In this news release, words such as "may", "would", "could", "will", "likely", "believe", "expect", anticipate", "intend", "plan", "estimate" and similar words and the negative form thereof are used to identify forward-looking information.

Forward-looking information should not be read as guarantees of future performance or results, and will not necessarily be accurate indications of whether, or the times at or by which, such future performance will be achieved. Mineral exploration is subject to risks and uncertainties and there is no assurance that any potential results or findings that may be suggested in this press release will ultimately happen. Forward-looking information is based on information available at the time and/or the Company management's good faith belief with respect to future events and is subject to known or unknown risks, uncertainties, assumptions and other unpredictable factors, many of which are beyond the Company's control. For additional information with respect to these and other factors and assumptions underlying the forward-looking information made in this news release, see the Company's most recent Management's Discussion and Analysis and financial statements and other documents filed by the Company with the Canadian securities commissions and the discussion of risk factors set out therein. Such documents are available at www.sedarplus.ca under the Company's profile and on the Company's website. The forward-looking information set forth herein reflects the Company's expectations as at the date of this news release and is subject to change after such date.

This release may contain certain forward‐looking statements with respect to the financial condition, results of operations and business of the Company and certain of the plans and objectives of the Company with respect to the same. By their nature, forward‐looking statements involve risk and uncertainty because they relate to events and depend on circumstances that will occur in the future and there are many factors that could cause actual results and developments to differ materially from those expressed or implied by these forward‐looking statements.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any state in the United States in which such offer, solicitation or sale would be unlawful. The securities referred to herein have not been and will not be registered under the United States Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements. This release may contain statements within the meaning of safe harbour provisions as defined under securities laws and regulations.

We seek safe harbour.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/254565

FAQ

What are the key minerals found at Glenstar's (GSTRF) Wildhorse property in Nevada?

The Wildhorse property shows polymetallic mineralization including copper, gold, silver, antimony, with initial sampling revealing over 1 g/t gold, 1% copper, and 6,100 ppm antimony. Bismuth and tungsten (>200 ppm) were also reported.

How large is Glenstar's (GSTRF) Wildhorse property and when was it acquired?

The Wildhorse property comprises 900 acres (364 hectares) in Mineral County, Nevada, and was acquired through staking in early 2025.

What are the three main mineralized zones at GSTRF's Wildhorse property?

The three main zones are the Rattlesnake Zone (with historical underground exploration), the Coca Cola Zone (featuring copper oxide mineralization), and a third zone with a bedrock cut and dump area.

What type of deposit is Glenstar (GSTRF) targeting at the Wildhorse property?

Glenstar is targeting a large, well-mineralized skarn system under the surface workings within the controlling north-south fault zone.

When did Glenstar (GSTRF) begin its exploration program at Wildhorse?

Glenstar began its exploration program in early June 2025, focusing on comprehensive rock chip sampling and geologic mapping of three known mineralized zones.