Underground Gold Potential Grows at Colosseum

About this update from Dateline Resources Limited

Colosseum Gold Mineralization Extended by Broad Intersections SAN BERNARDINO, CA / ACCESS Newswire / May 15, 2026 / Dateline Resources Limited (ASX:DTR)(OTCQB:DTREF)(FSE:YE1) (Dateline or the Company) is pleased to announce two new broad gold intersections from drill testing of the northeast extension at the North Pit at Colosseum. The Colosseum Gold-REE Project is located in San Bernardino County, California, with the gold Bankable Feasibility Study recently completed. Drillhole CM26-42 was drilled further to the northeast than previous holes, extending the mineralized zone further to the north and at depth. Drillhole CM25-41 was extended from 149.6m to 437m following positive results in 2025, increasing the mineralized zone by a further 140m downhole. Highlights High Density Rocks Correlate with Gravity Anomalies: Specific gravity (SG) analysis of REE drilling indicates high SG readings of greater than 2.8g/cm3, in line with density readings from Mountain Pass carbonatites and well above the 2.65g/cm3 in the breccia pipes. Dateline's Managing Director, Stephen Baghdadi, commented: "Gold mineralization at the Colosseum North Pit continues to extend to the northeast and these latest drill intersections again highlight the robust nature of the deposit. "These broad gold intersections highlight the potential for the definition of an underground deposit at Colosseum that could be exploited following the completion of open pit mining. "Based on the positive indications so far, the rare earth drilling program has now been expanded to 18 holes. The high-density rocks are an encouraging indicator that we are on the right track." Colosseum North Pit NE Gold Extensions Drilling in late 2025 identified a zone in the North Pit at Colosseum demonstrating broad zones of consistent gold mineralization. Previous intercepts in the area included 149.65m @ 1.39g/t Au in CM25-41, 295.64m @ 1.04g/t Au in RC25-035 and 105.15m @ 1.24g/t Au in RC25-037. As CM25-41 ended in mineralization, it was subsequently re-entered and extended to 437 metres. The mineralized zone was extended by a further 140 metres to 287.3 metres. The overall intersection is 287.3m @ 1.05g/t Au, with a high-grade component of 17.7m @ 6.13g/t Au. CM26-42 was designed to follow up on the 2025 successes to the northeast of the North Pit and to define the true extents of the breccia pi...

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