Vancouver, Canada. August 15, 2025. Grosvenor Resource Corporation (“Grosvenor” or the “Company”) (Trading Symbol: GVR (TSX.V)) is pleased to report on the summary results of an initial NI43-101 Technical Report (the “Report”) on its 100 percent (%) interest in the Powder Property (“Powder”). The report was prepared by APEX Geoscience Ltd. (“APEX”) of Vancouver, BC.
The report has been prepared for Grosvenor for the purpose of supporting its listing on the TSX.V and determine potential future work programs on Powder to discover the property’s potential.
NI43-101 Technical Report
During 2025, APEX was retained by Grosvenor to complete an NI43-101 report and validate historic exploration work. The author of the report, Mr. Kristopher Raffle, B.Sc., P. Geo. of APEX, is an independent qualified person as defined by the Canadian Securities Administration (CSA) National Instrument 43-101.
The Report has been written in accordance with the requirements of the NI43-101 Standards of Disclosure for Mineral Projects, and is a technical summary of the available geological, geophysical, and geochemical data relevant to the Project. Mr. Raffle P.Geo., of APEX Geoscience Ltd. is the Qualified Person who has reviewed and verified the technical information contained in this new release. The Report will be filed on SEDAR.
The Powder Property
Powder consists of two contiguous mineral claims totaling 121.22 hectares, located 75 kilometers north of Kamloops, in south-central British Columbia, approximately 2 km west of the North Thompson River and the Yellowhead Highway 5.
In 1994, an exploration program collected 66 rock samples targeting altered and mineralized zones, revealing anomalous concentrations of gold (up to 4.96 ppm), silver, molybdenum, arsenic, and antimony, indicative of a high-level epithermal vein system. Additionally, a 11.7km Very Low Frequency Electromagnetic (VLF-EM) survey was carried out. The results from both geochemical and geophysical work support the property potential for epithermal-style precious metal mineralization and justify further exploration.
In May 2025, Grosvenor conducted a follow-up surface exploration program, building on historical work. The program included 30 rock samples and 19.8 line-kilometres of ground magnetic and VLF-EM surveys. Rock sampling targeted altered and mineralized zones confirming the presence of limonitic sheared granodiorite and quartz veins with brecciation and sulfide mineralization. Gold values reached up to 0.61 g/t, with six samples exceeding 0.1 g/t Au. Silver values peaked at 4 g/t, with 15 samples over 1 ppm Ag, and were associated with elevated As, Mo, Pb, and Zn. The VLF-EM data, collected at 24.8 kHz, showed strong continuity and improved resolution over historical data. Negative in-phase slopes were interpreted as potential buried conductive structures, supporting the presence of mineralized zones.
The 2025 program has reinforced the exploration potential of Powder and provides a solid foundation for follow-up work, including systematic geochemical sampling, IP/resistivity surveys, and eventual drill testing of identified targets.
Further Exploration Work
A two phase exploration program is recommended to better define the extent and character of gold-silver quartz vein systems on Powder. A results-driven program is proposed with a total estimated budget of $650,000. Phase one ($200,000), includes surface rock and soil geochemical sampling along east-west lines, and six pole-dipole induced polarization/resistivity survey lines. Contingent on phase one, phase two ($450,000) involves 1,000m of diamond drilling targeting anomalies identified from geochemical and geophysical surveys, with potential for expansion based on results.
For further corporate information contact:
Ian Rozier, M.Sc, P.Eng (Non-Practising)
Director and Chief Executive Officer
604-685-6851
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the accuracy or adequacy of this news release.
Cautionary Statement on Forward-Looking Information
This news release is intended to provide readers with a reasonable basis for assessing the future performance of the Company. The words “believe”, “should”, “could”, “expect”, “anticipate”, “contemplate”, “target”, “plan”, “intends”, “continue”, “budget”, “estimate”, “may”, “will”, “schedule” and similar expressions identify forward-looking statements. Forward-looking statements may pertain to assumptions regarding exploration plans. Forward-looking statements are based upon a number of estimates and assumptions that, which are considered reasonable by the Company, are inherently subject to business, economic and competitive uncertainties and contingencies. Factors include, but are not limited to, the risk of fluctuations in the assumed prices of gold, silver, the risk of changes in government legislation including the risk of obtaining necessary licences and permits, taxation, controls, regulations and political or economic developments in Canada or other countries in which the Company carries or may carry on business in the future, risks associated with developmental activities, the speculative nature of exploration and development, and assumed quantities or grades of reserves. Readers are cautioned that forward-looking statements are not guarantees of future performance. There can be no assurance that such statements will prove to be accurate and actual results and future events could differ materially from those acknowledged in such statements.
The Company disclaims any intention or obligation to update or revise any forward-looking statements whether as a result of new information, future events or otherwise, except to the extent required by applicable laws.