AMN - NAMIBIA: Agreement for Uis technical services

Montero Mining and Exploration has signed a non-binding Letter of Intent with Gravity Worx Mining Solutions (Pty) Ltd to provide technical services for potential development of the Uis Lithium-Tin Tailings Project in Namibia. These services include but are not limited to metallurgical and engineering consulting services.

These services will be provided at no cost to Montero and will allow Gravity Worx to develop a non-binding proposal to Montero to supply a metallurgical process plant to process tailings material containing lithium and tin and operational services on a Build, Own, Operate and Transfer (BOOT) basis.

Gravity Worx is finalising a non-compliant scoping study on the project.

Montero's president and CEO Dr Tony Harwood said: “Montero is pleased to announce this non-binding Letter of Intent with Gravity Worx to assist in the potential development of the Uis Lithium Tin Tailings project.

"Gravity Worx is a specialist engineering company that provides fit for purpose engineering and operational solutions to the minerals sector. Gravity Worx will provide consulting services at no cost to Montero in order to be granted the opportunity to present a non-binding proposal for a Build Own Operate and Transfer solution.

"The Uis Lithium-Tin Tailings project has an NI43-101 inferred mineral resource of 14.4 million tonnes at 0.37% lithium and 17.1 million tonnes at 0.05% tin in coarse and fine tailings material.

"Montero and Gravity Worx are evaluating the metallurgy characteristics of the tailings in order to cost and design a lithium and tin process plant.”

The Uis project is in central Namibia near the town of Uis, 220 kilometres north of Walvis Bay, Namibia’s largest commercial deep-water port. The project is in the Erongo Region connected by dirt and asphalt road to Walvis Bay.

The lithium-caesium-tantalum (LCT) pegmatite field that hosts the Uis Tin mine is hosted in metasedimentary units of the Damara Mobile Belt, the northeast-trending branch of the Neo-Proterozoic, Pan African Damara Orogen in Namibia. The unzoned albite rich pegmatites at the Uis Tin mine belong to a group of highly fractionated, cassiterite and lithium-rich rare metal pegmatites.

The Uis project comprises un-weathered surface mine tailings of coarse sand tailings and slimes derived from the Uis tin mining operation between 1924 and 1990. The pegmatites were mined by open cut and hauled to a process plant for crushing and milling for cassiterite extraction.

The mine historically produced 35,400 tonnes of cassiterite concentrate which delivered coarse and fine tailings material on surface.

The tonnage and grade of the tailing material has been substantiated by a mineral resource estimate announced on January 14, 2019. The pegmatites at Uis have not previously been mined or systematically sample assayed for lithium.

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