GreenX Metals Confirms Deep Copper Source Beneath Historical Tannenberg Mines in Germany

GreenX Metals (ASX: GRX) has identified the likely deep source of copper mineralisation below Germany’s historic Richelsdorf district.

An airborne magnetic and radiometric survey has confirmed the presence of the Mid-European Crystalline Zone (MECZ), a major geological structure that is widely considered the source of metals for the Kupferschiefer deposits, which together form one of Europe’s most important copper belts.

The findings mark the first modern exploration at the Tannenberg copper project in four decades and provide a strong rationale for renewed exploration.

Deep Geological Insights

GreenX used helicopter-mounted equipment to conduct the 58 square kilometre airborne survey across 660 line kilometres at 100 metre spacing.

Data processing revealed two large amplitude magnetic anomalies supported by gravity modelling, both consistent with an uplifted basement block below the old mines.

Chief executive officer Ben Stoikovich said the identification of this structure for the first time at Tannenberg represents a breakthrough after 40 years without modern exploration, adding that the new data will provide a foundation for reinterpreting the district’s geology.

Alongside the anomalies, the survey mapped fault patterns hidden below the deepest known drilling that are critical in the formation of Kupferschiefer-style mineralisation, where copper is scavenged from the basement and redeposited in overlying rocks.

GreenX said the combination of a proven metal source and mapped fluid pathways greatly increases confidence in the potential for further copper discoveries within the licence.

Expanded Project Potential

The anomalies and fault zones extend to the east and northwest into the larger Tannenberg 2 licence, suggesting the mineral system is far more extensive than previously thought.

With its combined 1,900 square kilometre landholding, GreenX controls one of the largest brownfields copper exploration positions in central Europe.

The company noted that the project benefits from existing infrastructure, shallow cover and a long mining history, which together create favourable conditions for future development.

Mr Stoikovich said the expanded footprint reinforces the project’s strategic value at a time when copper is increasingly important to both Germany and the European Union.

“Our archive review is progressing at pace, and with the combined interpretation of the geophysics results, continues to contribute to our confidence in the value of this project,” he added.

Next Steps with BHP Xplor

The BHP Xplor program fully funded the survey, which GreenX has since extended until October 2025.

The partnership seeks to speed up exploration through integration of modern data with extensive historic records.

Planned work includes relogging and assaying historical core, hyperspectral scanning, reprocessing legacy geophysics, and building a new geological model of the district.

GreenX said this work would guide drill targeting and ensure that future campaigns focused on areas with the greatest potential to host high-grade copper.