Glenstar Reports Additional Gold Assays and Increases Land Position at Wildhorse Project

Rhea-AI Summary

Glenstar Minerals (OTCQB: GSTRF) has reported additional gold assays from its Wildhorse Project in Nevada, reinforcing evidence of a copper-gold skarn target. The company's Phase 1 exploration at the Coca Cola Zone revealed significant gold assays ranging from 2.18 to 11.2 g/t and copper values up to 5.29%.

The company has expanded its land position by staking 28 additional claims, bringing the total to 89 claims covering 1,780 acres. The geological setting, featuring magnetite + epidote + pyrite alteration, suggests potential for a copper-gold porphyry system. Glenstar has hired expert geologist Tom Borovicka and plans trenching activities and an airborne drone magnetic survey to advance exploration efforts.

Positive

• None.

Negative

• Early stage exploration with uncertain size of mineralization system
• Partial land coverage by landslide rubble and boulder bearing gravel units concealing underlying geology

• FURTHER ASSAY RESULTS POINT TO COPPER-GOLD SKARNIFICATION UNDERLYING PROPERTY-WIDE PORPHYRY SYSTEM POTENTIAL

• 28 ADDITIONAL CLAIMS STAKED TO EXPAND PHASE 2 EXPLORATION TARGETS

Vancouver, British Columbia--(Newsfile Corp. - September 24, 2025) - Glenstar Minerals Inc. (CSE: GSTR) (OTCQB: GSTRF) (FSE: VO20) ("Glenstar" or the "Company") announces that additional gold assays from rock samples collected at the Coca Cola Zone during Phase 1 exploration work at the Company's Wildhorse Project in Mineral County, Nevada, continues to support the contention of an emerging copper-gold skarn target. Outcropping of high-grade copper plus gold at surface on the Coca Cola Zone, when taken into consideration with all of the historical geologic data gathered to date, suggest that the property is underlain by a copper-gold porphyry system of unknown size. The presence of abundant magnetite + epidote + pyrite alteration encountered near the Coca Cola Zone so far supports the evidence that this type of geology is a classic setting for copper porphyry systems.

The mineralization found at surface to date is hosted in the Triassic age Excelsior Formation, a complex unit of greenstones and metasedimentary rocks. This is of particular note as several large copper porphyry deposits of Jurassic age are well known, including the past producing Yerington deposit located approximately 35 miles west of Wildhorse. The copper mineralization at Yerington is also hosted in the Excelsior formation. Copper-gold skarn systems are common above and around porphyry copper systems.

The table below shows the assay results received from rock sampling that was previously reported, along with four new gold assays that were provided by ALS Chemex of Vancouver, BC, Canada. (see news releases dated July 23, 2025 and September 3, 2025)

Assays from Phase 1 of sampling at the Coca Cola Zone

Sample	Gold (Au)		Silver (Ag)*		Copper (Cu)*
	g/t	oz/t	g/t	oz/t	%
WLDH-R-1	6.31	0.20	21.1	0.68	1.50
WLDH-R-2	5.10	0.16	24.3	0.78	5.29
WLDH-R-3	2.18	0.07	6.53	0.21	2.25
WLDH-R-4	9.42	0.30	34.6	1.12	5.14
WLDH-R-13	11.2*	0.36*	11.6	0.37	4.45

 
*Previously Reported

At this early stage of exploration at Wildhorse, Glenstar has retained highly regarded economic geologist and porphyry copper expert, Tom Borovicka, to produce a detailed and comprehensive geologic base map of the property. The Company is also in the final stages of permitting for a series of trenches to better expose Coca Cola Zone. It is anticipated that initial trenching will be comprised of three parallel trenches, five feet wide and three feet deep and each measuring 50 feet in length, spaced 20 feet apart. Additionally, an airborne drone magnetic survey is planned to cover the property in its entirety utilizing 50 meter spacing to better inform ongoing exploration plans.

The Company also announces that it has staked a further 28 claims to the west, south, and southeast of the Coca Cola and Highland Zones. This increases the total land package to 89 claims representing 1,780 acres (~720 hectares). The focus of the Phase 2 exploration program will be to greatly increase sample density and geologic information of the identified central zone.

Property scale zoning of gold, silver, tungsten, bismuth, tellurium, and base metals suggest the center of the mineralized system at Wildhorse lies around and between Coca Cola and Rattlesnake Zones, and may extend under cover to the east and west of these outcropping areas. Data compiled thus far suggests that there could be in excess of 1 km of strike length over these two zones of interest, and the geologic mapping will be an important addition to the current database in order to define the true extent of the skarn system and the expected underlying porphyry system.

Project Background & Recent Exploration Work

The Wildhorse Property is comprised of 89 mineral claims, representing 1,780 acres (720 hectares) in Mineral County, Nevada, and 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. All fieldwork relating to geologic observations and sampling as reported herein, has been directly overseen by Mr. Marvin who supervised the preparation of, and has reviewed and approved, the technical information in this 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 at 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.sedar.com 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. We seek safe harbour.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/267700

FAQ

What were the latest gold assay results from GSTRF's Wildhorse Project?

The latest assays from the Coca Cola Zone showed gold values ranging from 2.18 to 11.2 g/t, with copper values up to 5.29% and silver values up to 34.6 g/t.

How many claims does Glenstar Minerals now hold at the Wildhorse Project?

After staking 28 additional claims, Glenstar now holds 89 total claims covering 1,780 acres (720 hectares) at the Wildhorse Project in Nevada.

What type of mineralization system is indicated at GSTRF's Wildhorse Project?

The geological evidence, including magnetite + epidote + pyrite alteration, suggests the presence of a copper-gold skarn system potentially underlain by a larger copper-gold porphyry system.

What are Glenstar's next exploration steps at the Wildhorse Project?

Glenstar plans to conduct trenching activities with three parallel trenches and an airborne drone magnetic survey with 50-meter spacing, while also producing a detailed geologic base map.

Where is the Wildhorse Project located and what is its geological significance?

The Wildhorse Project is located in Mineral County, Nevada, approximately 35 miles east of the historic Yerington deposit, and features similar host rocks in the Triassic age Excelsior Formation.