Sandfire Resources America Inc. announced initial drill results of its winter 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 4,420 meters of a planned 20,000-meter drill program.

Drilling conducted by Ruen Drilling of Hope, ID. 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, photographed in White Sulphur Springs, Montana, all mineralized zones were sampled by cutting half-core splits which were delivered to ALS labs in Reno NV 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 company is aware of no drilling, sampling, recovery, or other factors that could materially affect the accuracy or reliability of the data.