Geothermal Raw Material Extraction Under the Microscope

With the Critical Raw Materials Act, the European Union has set the goal of reducing dependence on critical raw materials by 2030. The CuLiWell project of the Helmholtz Forum Earth and Environment is therefore investigating the extraction of copper and lithium from geothermal fluids in northern Germany, with the participation of KIT. In a newly published fact sheet, experts outline the challenges and possible approaches.

Closing Knowledge Gaps, Unlocking Potential

One such possibility is the direct extraction of lithium from deep‑lying sandstones of the North German Basin, a process that could also yield copper. This co‑extraction is relatively environmentally friendly and economically viable; however, the low permeability of the rock formations has so far hindered extraction processes. “While there are already promising approaches, scaling them up to industrial dimensions has not yet been achieved,” explains Dr. Elisabeth Eiche from the Institute of Applied Geosciences at KIT. “Furthermore, there are still research gaps. That is why it is very important to continue supporting collaborative projects and to address these challenges in a scientifically sound and reliable manner.”

In their fact sheet, the researchers outline concrete options for action designed to enable reliable extraction as well as economic viability. These range from establishing industrial demonstration facilities to federal and state policy initiatives, such as multidimensional subsurface planning and accelerated access to geological data. In the CuLiWell project, researchers from the Helmholtz Association, of which KIT is a member, collaborate with the Fraunhofer-Gesellschaft and federal departmental research institutions, bringing their expertise into dialogue with industry, civil society, and policymakers.

lla, April 1, 2026