Cornish Lithium Cross Lanes funding: viability and design notes for mine engineers
Reviewed by Tom Sullivan
First reported on International Mining – News
30 Second Briefing
Cornish Lithium has secured a £7.2 million UK Government DRIVE35 grant to part-fund a £14.5 million drilling and testing programme at its Cross Lanes geothermal lithium project at Baldhu, near Truro in southwest England. The work will focus on deep geothermal brines, using test wells and flow testing to evaluate lithium concentrations, reservoir productivity and sustainable heat extraction. Results will determine the technical and economic viability of commercial-scale geothermal lithium production in Cornwall, with implications for well design, brine handling and direct lithium extraction process selection.
Technical Brief
- Funding structure implies staged drilling and testing, with spend gated by interim technical results.
- Deep geothermal targeting near Truro must account for regional faulting and high geothermal gradient in well design.
- UK Government backing de-risks early-stage capex, potentially lowering cost of capital for subsequent production wells.
- Outcomes will influence whether future Cornish geothermal wells are optimised primarily for lithium, heat, or co-production.
Our Take
Cornish Lithium’s earlier work at the Trelavour hard-rock demonstration plant near St Austell shows the company already tackling flow and materials-handling issues in complex lithium circuits, which is likely to inform how it designs surface processing for any geothermal brine from Cross Lanes.
Planning permission secured for drilling at the Copper House site near Burncoose and Redruth indicates that Cornwall Council’s mineral planning authority is becoming familiar with Cornish Lithium’s proposals, which should help de-risk the permitting pathway for the Baldhu/Truro geothermal programme in southwest England.
Within our 111 lithium-tagged pieces, most UK items focus on exploration or processing trials rather than government-backed financing, so this UK Government support signals a higher level of policy endorsement for domestic lithium supply than seen in earlier Cornish Lithium coverage.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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