Sandfire Resources America Announces Results of Updated Pre-Feasibility Study for the Johnny Lee Deposit and Updated Mineral Resource for the Lowry Deposit at the Black Butte Copper Project
Updated PFS for the Johnny Lee Deposit and new Mineral Resource estimate for the nearby Lowry Deposit underline the high-grade underground copper potential, with a Probable Mineral Reserve for the Johnny Lee Deposit of 9.5Mt at 2.9% Cu for 270,000t of copper and an 8-year life at the Black Butte Copper Project in Montana, USA, that aligns with the stringent Mine Operating Permit conditions. WHITE SULPHUR SPRINGS, Mont., Dec. 16, 2025 (GLOBE NEWSWIRE) -- Sandfire Resources America Inc. (“Sandfire
Updated PFS for the Johnny Lee Deposit and new Mineral Resource estimate for the nearby Lowry Deposit underline the high-grade underground copper potential, with a Probable Mineral Reserve for the Johnny Lee Deposit of 9.5Mt at 2.9% Cu for 270,000t of copper and an 8-year life at the Black Butte Copper Project in Montana, USA, that aligns with the stringent Mine Operating Permit conditions. WHITE SULPHUR SPRINGS, Mont., Dec. 16, 2025 (GLOBE NEWSWIRE) -- Sandfire Resources America Inc. (“Sandfire