Fault Offset Discovery Raises Stakes for Gulf Creek Copper Project

New Geophysical Insights at Gulf Creek

OD6 Metals Limited has announced encouraging results from its Down Hole Electromagnetic (DHEM) survey at the Gulf Creek Copper Project in northern New South Wales. The survey, completed in December 2025, identified a strong off-hole conductor approximately 75 metres beyond the end of drill hole GDD010, which lies close to historic high-grade copper workings.

This discovery is significant because it suggests the presence of previously undetected mineralisation, potentially offset by a structural fault or existing as stacked lodes beneath the historic mine. The DHEM method, which detects conductive sulphide bodies by transmitting electromagnetic fields from surface loops and measuring responses down drill holes, is particularly effective in complex geological settings like Gulf Creek.

Expanding the Exploration Footprint

The survey encompassed six drill holes across key target areas, including Gulf Creek itself, Big Bend, West Limb, and the Northwest Target. While the Big Bend and West Limb areas did not reveal significant off-hole conductors, the Northwest Target showed a possible additional conductor warranting further investigation.

Importantly, the geological reinterpretation informed by the DHEM data suggests a fault offset that may have displaced the main mineralised lode, opening new avenues for exploration. This structural insight aligns with the presence of silicified material in drill hole GDD010, interpreted as a fault zone, reinforcing the potential for undiscovered high-grade copper mineralisation nearby.

Next Steps and Project Outlook

OD6 Metals is awaiting assay results from its recent diamond drilling program, which will provide critical data on the grade and extent of mineralisation intersected. The company is fully permitted to undertake an additional 25 drill holes at Gulf Creek, positioning it well to follow up on these promising geophysical targets.

Managing Director Brett Hazelden expressed confidence in the findings, highlighting that the combined data from drilling, historic records, and geophysical modelling significantly advance the understanding of the project’s geology. He emphasised that the newly identified conductor represents a high-priority target that could extend the known mineralisation at depth.

Beyond Gulf Creek, OD6 Metals continues to develop its rare earths portfolio at the Splinter Rock Project in Western Australia, underscoring its diversified approach within the critical minerals sector.

Balancing Historical Legacy with Modern Exploration

The Gulf Creek mine, once one of New South Wales’ highest-grade copper producers in the early 1900s, has seen limited exploration in the past century. OD6’s application of modern geophysical techniques like DHEM is breathing new life into this historic site, offering a glimpse of the untapped potential beneath the surface.

As assay results come to hand and follow-up drilling is planned, the market will be watching closely to see if these geophysical signals translate into economically viable mineralisation. The integration of DHEM data with geological and geochemical information will be key to refining drill targets and unlocking the project’s full value.