St Barbara's (ASX:SBM) 15-Mile Processing Hub project' mineral resources estimate (MRE) rose 20% to 62.4 million tonnes at 1.2 grams per tonne (g/t) grade of gold containing 2.5 million ounces in July from 59.4 million tonnes at 1.1 g/t grade of gold containing 2 million ounces in December 2025, according to a Tuesday filing with the Australian bourse.
The upgrade brings the company's group MRE to 5.4 million ounces, the filing said.
The ore reserves estimate for the project will be updated following an updated pre-feasibility study, expected to be finalized by the end of the first quarter of fiscal year 2027.
The updated MRE will be incorporated into the feasibility study slated for the fourth quarter of fiscal year 2027, per the filing.
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