Exploring the future
of renewable energy
The deep underground waters at Tolgus near Redruth have been identified as having potential for lithium extraction. Consequently, exploration drilling and water testing were conducted at the site from May to November 2024. Further analysis to assess the lithium content of these waters is ongoing.
Frequently asked questions
The Tolgus area was selected as a promising site to explore for lithium in geothermal waters following intensive desk studies, 3D modelling, and reviewing historic mining data for the area.
Exploration drilling took place at this site from May to November 2024, including testing of the waters. Further analysis of the waters to assess the lithium content is taking place from November 2024 onwards.
The exploration site has been re-instated, with equipment removed and the site returned to its original state. Re-seeding of the field will take place when the weather allows. Results of the exploration are being reviewed.
The final depth of the borehole was around 2km. Permeable structures with geothermal waters found flowing, and the lithium grades of these waters are currently being reviewed. The final borehole temperature was 74 degrees.
The Mineral Planning Authority at Cornwall Council provided temporary permission for exploration work, under the submission number PA24/01499 and permission was sought from the Environment Agency. The landowner and mineral rights owners also provided agreements for this work.
