Lithium Discovery Extended with Exceptional 86.9-Metre Intercept at Red

CleanTech Lithium PLC (“CleanTech Lithium” or “CleanTech” or the “Company”) (AIM: CTL, Frankfurt:T2N), an exploration and development company advancing sustainable lithium projects in Chile, announces an updated resource estimate for its Laguna Verde project that has been included by the Chile Government as one of the six salar systems to be prioritised for development.

Highlights:

• The mineral resource estimate is updated from that reported in the RNS of 17 July 2023 based on additional exploration and pumping tests conducted in 2024
• The JORC (2012) compliant estimate was calculated by Montgomery & Associates (“Montgomery´”), a leading hydrogeological consultant highly experienced in lithium brine resource estimation
• The total updated resource is 1.63 million tonnes of Lithium Carbonate Equivalent (LCE), at a grade of 175 milligrams per litre (mg/l) lithium, of which 0.81 million tonnes is in the Measured + Indicated category at a grade of 178 mg/l lithium
• This current resource estimate is based on the proposed polygon area included in the Company´s recently submitted application for a Special Operating Contract for Lithium (“CEOL”)
• The previous 2023 estimate which totalled 1.77 million tonnes LCE at an average grade of 200mg/l lithium was based on the previously proposed CEOL area under the old application regime that was larger covering the entire estimated resource of the basin.
• Lithium concentrations obtained in the 2024 campaign were below the average grade of other exploration wells impacting the average lithium grade of the resource
• Montgomery recommends three additional drillholes in the southwest, north and northeast to potentially increase the resource based on completed geophysics
• This updated measured and indicated resource estimate will be used in the pre-feasibility study (PFS) which is intended to underpin a maiden reserve estimate for the Laguna Verde project

Steve Kesler, Executive Chairman, CleanTech Lithium said: “The updated JORC-compliant resource estimate for the Laguna Verde project, independently determined by Montgomery & Associates, confirms a robust and significant resource of 1.63 million tonnes of Lithium Carbonate Equivalent (LCE), with 0.81 million tonnes in the Measured and Indicated category at an average grade of 178 mg/l lithium. Now with greater confidence in the resource, this comprehensive evaluation will form the basis for the Pre-Feasibility Study, scheduled for end of this quarter. This positions Laguna Verde as a highly promising direct lithium extraction (DLE) based project in the lithium brine sector and as a contributor to Chile’s future as a leading lithium producer for the global EV and battery market.”

Further Details:

Project Background

The Laguna Verde corresponds to a lithium brine deposit which is found in the Atacama Region of Chile, near the Chile – Argentina border. The project consists of mining concessions located approximately 192 kilometres (km) northeast of Copiapó. The concession area is…