Yari Minerals Limited Unlocks Expansion Potential: New Drill Data Reveals Thicker Coal Seams Bolstering 151Mt Inferred Resource at Rolleston South Project

Monday, August 11, 2025
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8:26 am
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Yari Minerals Limited’s latest geophysical data from three CSG wells reveals unexpectedly thick coal seams near its Rolleston South Coal Project. These results could lead to an expanded resource estimate and higher asset value, with upcoming drilling set to further validate these promising insights.

Yari Minerals Limited has disclosed promising technical results from three recent coal seam gas wells drilled on its Rolleston South Coal Project in Queensland’s Bowen Basin. The newly acquired high-quality downhole geophysical data from wells Rougemont 3, 5, and 6 confirms the presence of notable coal seams, with some intersections in the D seam horizon measuring up to 3.5 meters in thickness. This new input has been successfully integrated into the existing geological models, which already underpin a delineated inferred resource of 151 million tonnes. Early interpretations by the company’s geology team indicate that these thicker, and in some cases deeper, coal seams could lead to an expansion of the current resource estimate. The announcement highlights that the fresh data aligns closely with the established resource model, particularly within the Bandanna Formation. The report explains that wells Rougemont 5 and 6, in particular, encountered coal seams that exceeded prior expectations. Technical details, such as geophysical trace results and cross-sectional comparisons to the existing Datamine Minescape models, substantiate the potential for additional tonnage. Further updates to the resource model are underway and will be released once the integration process is complete. Alongside these encouraging technical findings, the company is actively progressing with plans to secure regulatory approvals for its inaugural drilling campaign in the second half of 2025. The project’s strategic proximity to major infrastructure—just 15 kilometers from Glencore’s Rolleston Mine and within 40 kilometers of Aurizon’s Blackwater Rail System—enhances its market potential, with opportunities to produce both export thermal coal and semi-soft metallurgical coal products. The new data has generated optimism among investors, as thicker coal seams could significantly boost the resource base of a high-quality asset. From a bullish perspective, the integration of advanced geophysical information, the potential for expanded resource estimates, and the proximity to established transport networks paint a positive picture for Yari Minerals Limited’s future prospects. However, on the bearish side, uncertainties remain as the updated geological model and resource estimates are yet to be finalized, and any delays in obtaining regulatory approvals or additional drilling complications could temper investor enthusiasm. Overall, while the technical details are promising, the coming months will be crucial in confirming the full scope of the resource potential.

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