Dateline Resources (ASX:DTR) said that the March quarter will mark a step-change in activity at the Colosseum gold and rare earth element project in the US as it moves into an accelerated drilling and execution phase, according to a Thursday Australian bourse filing.

Dateline said it will rapidly integrate the recently completed induced polarisation survey data with existing magnetotellurics, gravity, and radiometric datasets and commence deep diamond drilling to test extensions of the gold system and high-priority rare earth elements targets beyond the depth limits of previous reverse circulation drilling.

Two diamond drill rigs will mobilize in early February, with negotiations underway to expand to up to four rigs, enabling parallel drilling across multiple target areas and higher drilling rates, the filing added.

The company added that rare earth elements drill core samples will be prioritized for rapid assay turnaround to support real-time targeting, alongside completion of the bankable feasibility study and ongoing progress on long-term construction financing.