Great Plains Metals Completes the First Stage of the Farm-in at Yeoval Goodrich

Executive Summary

• Great Plains Metals Corp. (GPS) has completed Stage 1 of its earn-in agreement with Godolphin Resources Ltd, successfully securing a 51% interest in the Yeoval Goodrich Project in New South Wales, Australia.
• The company has fulfilled all Stage 1 commitments (A$1,000,000 expenditure and 500m drilling) and has formally elected to proceed to Stage 2 to earn a 70% interest.
• Stage 1 exploration included 2,065m of air-core drilling and 1,000m of diamond drilling, significantly advancing geological understanding and strengthening the case for a previously unrecognized porphyry copper-gold system.

Key Details

• Earn-in Agreement Terms: Signed June 4, 2025, with Godolphin Resources Ltd (ASX: GOD). GPS earned 51% by incurring A$1,000,000 in exploration expenditure and completing a minimum of 500 metres of reverse circulation and/or diamond drilling.
• Stage 2 Requirements: GPS must incur a further A$1,000,000 in exploration expenditure over the next 12 months and complete a minimum of 500 metres of RC/diamond drilling to increase its interest to 70%.
• Alternative JV Path: Godolphin has 20 business days from the notice date to elect a 51/49% Joint Venture (favoring GPS), after which Godolphin would be responsible for 49% of future expenditure.
• Project Funding: GPS completed a private placement of $4.18 million in February 2026 to ensure funding for progression through Stage 2.
• Stage 1 Exploration Activities: 2,065 metres of shallow air-core drilling completed around the former Goodrich mine and Mt Rose targets, advancing geological understanding.
• Diamond Drilling Progress: Phase One of the diamond drill program is complete with 4 holes totaling just over 1,000 metres at Goodrich (initial program up to 2,000m commenced May 2026). Assay results are pending.
• Geological Findings: The historical Goodrich mine and a newly recognized pencil porphyry at Mt Rose appear to be focal points within a widespread hydrothermal system, strengthening the case for a previously unrecognized porphyry copper-gold system at Yeoval Goodrich.
• Project Location & Tenure: Located ~70 km northwest of Orange, NSW, within the Macquarie Arc/Lachlan Fold Belt. Covers ~290 square kilometres across tenements EL 8538 and EL 9243.
• Infrastructure & Geology: Area underlain by granites, granodiorites, and volcanics, with over 60 historic mine workings. Project is accessible via sealed/unsealed roads and adjacent to railway infrastructure.
• Historical Mining: Goodrich Mine operated 1868–1912 (Cu-Au). Mt Rose is located ~2 km south of Goodrich, with limited mining in 1886. Regional exploration has been continuous since the 1960s, primarily at shallow levels.

Notable Quotes

• Peeyush Varshney, CEO: "Completing the first stage of our earn-in agreement marks a pivotal milestone for GPS at Yeoval Goodrich. We are increasingly confident that a previously unrecognized porphyry copper-gold system may be hosted here. With Phase One of the drill program having been completed we eagerly look forward to the assay results and additional geological modelling with a view to further advance the Project.”