Glenstar completes shear-wave seismic survey at Green Monster

Vancouver, British Columbia--(Newsfile Corp. - July 8, 2026) - Glenstar Minerals Inc. (CSE: GSTR) (OTCQB: GSTRF) (FSE: VO20) (" Glenstar " or the " Company ") announces that, further to the recent news release dated June 25 th , the Company has completed the Terēan Shear-Wave Seismic Geophysical Survey at its geologically complex Green Monster Project in Clark County, Nevada. The survey was completed and consisted of four (4) shear-wave velocity structure cross sections that were collected along 2,400 ft long arrays. This survey was designed to image cover thickness, depth to bedrock, key structural and lithologic features (faults and voids), and extended from the surface to a 600 foot cross section depth.

This Terēan survey was undertaken in order to gain a more detailed understanding of the intricate and complicated geological structures that appear to be present on the property. The final interpretation of the collected data is being compiled and analysed for the final report. The Terēan survey is a detailed geophysical survey that maps a number of critical factors pertaining to underground faults and structural controls on mineralization; including defining depth to competent rock, quantifying overburden, imaging paleochannels & alteration zones, as well as identifying weathered and fractured zones that could indicate the presence of large faults and their particular orientation.

Glenstar Geologist Bob Marvin noted that, "The Terēan survey is a powerful tool that will provide Glenstar with detailed information that will help determine what the next phase of drilling and exploration should be as we continue to advance the project. We do know that there is a definite complexity to the geologic structure, or structures, underlying the property and the results of this survey will allow us to gain a far better understanding of how these structures relate to the ore intercept in drill hole GMST-4." Numerous polymetallic zones were encountered during the Phase 2 program, which consisted of six (6) holes drilled to depths from 500 feet to 585 feet encompassing ~3,320 feet of total drilling across three (3) drill pads. These holes contained highly fractured rock with abundant clay alteration and brightly coloured orange and red oxide minerals and decalcification.

Assay results confirmed that the area of interest is significantly mineralized and geologically complex; however, at this early stage of exploration the grades reported are less than expected while at the same time raising a number of interesting questions. As a result of this geological complexity, further geophysical work is required to address the data that is inconclusive and provide a clearer understanding of the type of structure and system contained within the property. Project Background & Recent Exploration Work The Green Monster Property is comprised of 35 federal lode claims covering ~700 acres located in Clark County, Nevada, on the west trending spur of the Spring Mountains and is approximately 40 miles southwest of Las Vegas.

Until the recent drill programs conducted in May of 2025 and February of 2026, no drilling was ever conducted on the property. The Company's previous identification of robust nickel-copper with anomalous cobalt from sampling work done in 2022 indicated that several targets were ideal for shallow RC drilling (see news releases dated May 28, 2025, and July 16, 2025). Glenstar acquired the Green Monster Property and conducted initial groundwork in 2022 that included reconnaissance geologic mapping, surface rock sampling, soil sampling, and a drone magnetic survey.