Highlights
• Strong gold intercepts from infill drilling confirm the continuity of mineralisation at depth:
o RC25-020 returned 85.34m @ 1.33 g/t Au (beneath the existing pit) and,
o CM25-19 returned 61.26m @ 1.18 g/t Au (partial result; remaining assays pending),
• Assays received in line with expectations and demonstrate consistent grades over broad intervals, supporting the geological model.
• Expanded M&I mineral resource to strengthen Feasibility Study: A larger high-confidence (M&I) resource base will underpin the Bankable Feasibility Study (BFS), enhancing mine design and economic robustness.
Dateline Resources Limited (ASX: DTR, OTCQB: DTREF, FSE: YE1) (Dateline or the Company) is pleased to announce that recent drilling at its 100%-owned Colosseum Gold and Rare Earth Element (REE) Project in San Bernardino County, California has returned encouraging gold assay results that align with the Company’s expectations and confirm the continuity of mineralisation within the existing open-pit mineral resource. These results strongly support the Company’s strategy to convert Inferred Mineral Resources to the higher confidence Measured and Indicated categories, thereby upgrading the JORC-2012 mineral resource as part of the ongoing feasibility work.
The standout drilling intercepts include 85.34 metres at 1.33 g/t Au from RC25-020, a reversecirculation hole drilled beneath the current pit floor, and 61.26 metres at 1.18 g/t Au from CM25-19 (a diamond core hole for which assays are still pending beyond this interval). Hole RC25-020’s long intercept of consistent gold grades indicates a continuation of the gold mineralisation below the mined pit, extending the known mineralised envelope at depth. Hole CM25-19, an infill hole targeting a previously sparsely drilled zone, has already delivered a substantial gold interval in its upper section.
The breadth and grade of these intersections are comparable to the deposit’s average mineral resource grade, reinforcing confidence that the geological model is accurate and that gold mineralisation persists as predicted.
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About us:
About Dateline Resources Limited
Dateline Resources Limited (ASX: DTR, OTCQB: DTREF, FSE: YE1) is an Australian company focused on mining and exploration in North America. The Company owns 100% of the Colosseum Gold-REE Project in California.
The Colosseum Gold Mine is located in the Walker Lane Trend in East San Bernardino County, California. On 6 June 2024, the Company announced to the ASX that the Colosseum Gold mine has a JORC-2012 compliant Mineral Resource estimate of 27.1Mt @ 1.26g/t Au for 1.1Moz. Of the total Mineral Resource, 455koz @ 1.47/t Au (41%) are classified as Measured, 281koz @1.21g/t Au (26%) as Indicated and 364koz @ 1.10g/t Au (33%) as Inferred.
On 23 May 2025, Dateline announced that updated economics for the Colosseum Gold Project generated an NPV6.5 of US$550 million and an IRR of 61% using a gold price of US$2,900/oz.
The Colosseum is located less than 10km north of the Mountain Pass Rare Earth mine. Planning has commenced on drill testing the REE potential at Colosseum.
Dateline has also acquired the high-grade Argos Strontium Project, also located in San Bernadino County, California. Argos is reportedly the largest strontium deposit in the U.S. with previous celestite production grading 95%+ SrSO4.
Contact details:
Stephen Baghdadi
ManagingDirector
+61 2 9375 2353
www.datelineresources.com.au
Andrew Rowell
Corporate & Investor Relations Manager
+61 400 466 226
[email protected]