お知らせ • Dec 17
Sandfire Resources America Inc. 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 Sandfire Resources America Inc. announced its updated Mineral Resource and Reserve and the results of the Preliminary Feasibility Study Update (the "Study Update" or "PFS") for the Johnny Lee deposit at its Black Butte Copper Project in White Sulphur Springs, Montana, USA, pursuant to National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101"). The Study Update relates to Mineral Resources and Reserves associated with the Johnny Lee copper deposit, the cornerstone deposit at the Black Butte Copper Project (the " Johnny Lee Deposit" or the "Project"). The Study Update economic analysis is based on the Johnny Lee Deposit Mineral Reserves and does not include theLow Deposit. The current study is an underground Pre-Feasibility Study for the Johnny Lee Deposit, building on the prior Preliminary Economic Assessment (PEA, 2013) and the subsequent Feasibility Study completed in 2020, which defined an initial Mineral Reserve for the Johnny Lee Deposit. The Study Update incorporates updated geological and structural models for the JL UCZ and JL LCZ, revised Mineral Resource and Mineral Reserve estimates, updated metallurgical test work and recovery models, integrated with systematic mineralogy and geometallurgical modelling, and updated capital and operating cost estimates and refining charges, using long-term copper price estimates of USD 4.70/lb. The Study Update mine plan and economic analysis are based only on the Johnny Lee Deposit MineralReserves. The Mineral Reserves identified in Table 1 comply with CIM definitions and standards for a NI 43- 101 technical report. Detailed information on mining, processing, metallurgical, and other relevant factors demonstrate, at the time of the Study Update, that economic extraction is feasible. The Study Update did not identify any mining, metallurgical, infrastructure or other relevant factors that may materially affect the estimates of the Mineral Reserves or potential production. All deposits have anomalous silver and cobalt mineralization; however, copper is the only economic product considered in the Study Update. Geotechnical data used for the Study Update includes information pre viously collected by Sandfire America, MD Engineering, and Mining Plus. This data includes drill core logging, QA/QC reviews, structural measurements, and laboratory rock-property testing. As part of the current study update, Entech completed a geotechnical assessment involving reviewing drill core from the JL UCZ, JL LCZ, and planned decline areas, and incorporating both historical logging and new detailed photo-logging undertaken by Entech. Structural data were validated during an Entech site visit and used to characterize the rock mass and assess conditions relevant to the mine design. A 3D geotechnical model was developed combining the logging data and geological models and was utilized for visualization of geotechnical databases, and data from the JL UCZ and the Company's own geotechnical databases, including a geotechnical database. The Company has a geotechnical database and geotechnical database, and is currently being used for the Study Update. お知らせ • Sep 23
Sandfire Resources America Inc., Annual General Meeting, Nov 21, 2025 Sandfire Resources America Inc., Annual General Meeting, Nov 21, 2025. Location: british columbia, vancouver Canada お知らせ • Jul 18
Sandfire Resources America Inc. Announces Board Changes Sandfire Resources America Inc. announced the appointment of Stef Weber to Its Board of Directors, Effective July 17, 2025. Mr. Weber brings over 25 years of global experience in the mining industry, with a strong background in finance, project development, and corporate strategy. He has held senior leadership roles in debt financing, joint ventures, mergers and acquisitions, and treasury management. Mr. Weber began his career with PricewaterhouseCoopers and subsequently spent 16 years in senior financial roles with Iscor Limited, Kumba Resources Limited, and Exxaro Resources Limited. He joined Sandfire Resources Limited in October 2019 following its acquisition of MOD Resources Limited, where he served as Chief Financial Officer. Mr. Weber currently serves as Head of Treasury for Sandfire Resources Limited. The Company thanks Ms. Tually for her valuable contributions to the Board and wishes her well in her future endeavors. お知らせ • Jan 22
Sandfire Resources America Inc. Announces Board Changes Sandfire Resources America Inc. announced that Gemma Tually has been appointed to the Sandfire America Board of Directors effective immediately. This occurs in conjunction with Victoria Twiss stepping down from her seat on the Board. Ms. Tually is the Chief Legal & Compliance Officer for Sandfire Resources Ltd. (Australia); 86.9% owner of Sandfire America’s outstanding shares. Ms. Tually is a qualified solicitor with more than 20 years of legal experience working across areas including mining, dispute resolution, international trade and transport, finance, and corporate law. お知らせ • Sep 17
Sandfire Resources America Inc., Annual General Meeting, Nov 15, 2024 Sandfire Resources America Inc., Annual General Meeting, Nov 15, 2024. Location: british columbia, vancouver Canada お知らせ • Jul 25
Sandfire Resources America Inc. Reports Additional High Grade Copper Intersections at the Black Butte Copper Project Sandfire Resources America Inc. announced additional drill results of its 2024 exploration drilling program. The ongoing 2024 drill program focuses on upgrading and expanding the Johnny Lee Lower Copper Zone resource which at last estimate consists of a measured and indicated resource of 1.2 million tonnes grading 6.8% Cu and an inferred resource of 0.5 million tonnes of 5.9% Cu (2020 Technical Report). Since December 2023, the Company has drilled approximately 8,000 meters of a planned 20,000-meter drill program. Intercept calculations included a minimum of 2 samples above a 1% copper cutoff grade. Drilling conducted by Ruen Drilling of Hope, Idaho. HQ3-sized core was collected. Drill holes were oriented with dips varying between -80 to -70 degrees in relatively variably dipping mineral zones. Intercepts may be slightly longer than true thickness. After being logged and photographed in White Sulphur Springs, Montana, all mineralized zones were sampled by cutting half-core splits which were delivered to ALS labs in Reno Nevada for processing. ALS crushed the entire sample to 85% passing 2mm then split off 1kg, which was ground to 85% passing 75 micron and wet-sieved the split to ensure grinding passed specifications and then assayed for gold by fire assay with AA finish. Base metals were analyzed using a 4-acid digestion and ICP-OES analysis. Various other trace and major elements were also analyzed utilizing ICP procedures. Sandfire America utilized a QA/QC protocol which included inserting Certified Reference Materials (CRM) on a minimum of 1 CRM in 20 samples insertion rate. Assays of duplicates, and blanks were also included as part of the QA/QC program. ALS Labs are accredited by ISO/IEC 170205:2017 methods for North America. Drillhole collars are surveyed conforming to UTM NAD83 Zone 12. The Johnny Lee deposit has a Measured and Indicated Mineral Resource of 10.9 million tonnes (Mt) at an average copper grade of 2.9% for 311 thousand tonnes (kt) of contained copper (Cu) at a 1.0% Cu cut-off grade, and an Inferred Mineral Resource of 2.7 Mt at an average copper grade of 3.0% for 80 kt of contained Cu at a 1.0% Cu cut-off grade (2020 Technical Report). The Company has received a Mine Operating Permit from the Montana Department of Environmental Quality for mine development of this deposit and has completed a majority of Phase I construction on surface construction facilities. The Company received a decision from the Montana Supreme Court on February 26, 2024, to re-instate the mine operating permit and allow construction to move forward. 