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Grande Portage Initiates Preliminary Economic Assessment and Receives Gold Payability Terms of Up to 87%
VANCOUVER, BC / ACCESS Newswire / October 20, 2025 / Grande Portage Resources Ltd. (TSXV:GPG)(...
About this update from Grande Portage Resources Ltd.
[{"type":"text","content":"Grande Portage Initiates Preliminary Economic Assessment and Receives Gold Payability Terms of Up to 87%VANCOUVER, BC / ACCESS Newswire / October 20, 2025 / Grande Portage Resources Ltd. (TSXV:GPG)(OTCQB:GPTRF)(FSE:GPB) (\"Grande Portage\" or the \"Company\") is pleased to report two major advancements at its New Amalga Gold Project in Southeast Alaska.The project hosts a high-grade mineral resource of 1.4 million ounces of gold (indicated) and 0.5 million ounces (inferred) and remains open to expansion in multiple directions. The current development concept envisions a small-footprint underground mining operation with third-party offsite processing, eliminating the need for an onsite mill or tailings storage facility.Strong Indicative Offtake Terms Confirm MarketabilityGrande Portage has received indicative ore offtake terms from a leading global concentrate trading firm, showing gold payability of 72% to 87%, depending on the grade of the shipment. Based on the Company's conceptual production plan incorporating sensor-based ore sorting, typical payabilities are expected to range from 80% to 85%.The offtake study confirms that New Amalga ore is readily marketable to Asian base metal smelters, custom concentrates facilities, roasting operations, and leach plants. Applicable treatment and refining charges (TC/RCs) are quoted at the copper benchmark treatment charge plus $95 per tonne, and a $10 per contained gold ounce refining charge.Preliminary Economic Assessment InitiatedFollowing this positive market feedback, Grande Portage has initiated an NI 43-101 Preliminary Economic Assessment (PEA). The Company has contracted all required Qualified Persons (QPs) and technical specialists, many of whom have direct project experience in Alaska, including at Pogo, Kensington, and Greens Creek, as well as within the Alaska DNR Office of Project Management and Permitting.An initial draft PEA is anticipated in early to mid-January, with final completion targeted for mid-to-late February 2026.PEA Consultant Team:Core Geoscience LLC - Environmental, Permitting, Social & Community ImpactsDRW Geological Consultants Ltd. - Geological Setting & Mineralization, Resource EstimatesMine Development Associates (RESPEC Inc.) - Capital & Operating CostsOreLogic LLC - Mining Methods, Recovery, Infrastructure, Market Studies, Economic Analysis...