Colosseum Project Hits 70% MT Survey Completion, 50% Geochemical Sampling Done

• Magnetotelluric survey 70% complete with preliminary 2D resistivity data under review
• Geochemical sampling halfway done, initial assay results expected in July
• 3D inversion of geophysical data to refine drill targets planned post-survey
• Project hosts 1.1 million ounces of gold with significant measured and indicated resources
• Planning underway for maiden rare earth element-focused drilling campaign

Exploration Momentum Builds at Colosseum

Dateline Resources Limited (ASX – DTR) is advancing its 100%-owned Colosseum Gold-REE Project in California with encouraging progress in both geophysical and geochemical exploration activities. The magnetotelluric (MT) survey, designed to probe deep subsurface structures that could host gold and rare earth element mineralisation, is approximately 70% complete. Early 1D and 2D resistivity models from the first three survey lines have already been generated and are under technical review, offering promising insights into the project's geological framework.

Alongside the MT survey, the company has collected about half of its planned geochemical samples across the claim area. These samples are being sent to laboratories in batches for comprehensive multi-element analysis, including rare earth elements, with initial assay results anticipated in July. This phased approach allows Dateline to integrate emerging data sets rapidly and refine its exploration strategy.

Stacked Evidence Approach to Drill Targeting

Dateline is employing a 'stacked evidence' methodology that combines geophysical conductivity data, gravity survey results, and geochemical anomalies to identify high-priority drill targets. The forthcoming 3D inversion of the full MT dataset, expected within weeks of survey completion, will provide a detailed subsurface model to enhance this integrated targeting approach. This comprehensive data fusion aims to pinpoint zones with the highest potential for both gold and rare earth mineralisation, critical for the project's next phase of development.

The Colosseum Project already boasts a JORC-compliant mineral resource estimate of 27.1 million tonnes at 1.26 grams per tonne gold, equating to approximately 1.1 million ounces of gold. Notably, over 67% of this resource is classified as measured and indicated, underscoring the project's robust foundation. Recent economic assessments have valued the project at US$550 million with an internal rate of return of 61%, reflecting strong financial prospects.

Rare Earth Element Potential in Focus

Situated less than 10 kilometres from the Mountain Pass rare earth mine, Colosseum's geological setting suggests significant rare earth element (REE) potential. Dateline has commenced planning for its maiden REE-focused drilling campaign, aiming to unlock value from this dual gold-REE asset. The integration of geophysical and geochemical datasets will be pivotal in guiding this drilling program, which could position Colosseum as a strategic source of critical minerals.

Managing Director Stephen Baghdadi expressed optimism about the exploration progress, highlighting the systematic approach and the value of combining multiple data streams. As the company awaits assay results and the final 3D geophysical models, the groundwork is being laid for targeted drilling that could materially enhance the project's resource base and economic outlook.

Bottom Line?

With key data sets converging, Dateline is poised to sharpen its drill targets and unlock Colosseum’s gold and rare earth potential.

Questions in the middle?

• How will the upcoming 3D MT inversion influence the prioritisation of drill targets?
• What initial geochemical anomalies might signal significant rare earth element zones?
• When will the maiden REE-focused drilling campaign commence and what scale is planned?