Macarthur Minerals completes desktop review and expands lithium projects in the Eastern Pilbara
Monday, Feb 29, 2016
Macarthur Minerals Limited (TSX VENTURE:MMS) (the "Company" or "Macarthur Minerals") is pleased to announce that it has made applications for additional exploration licences in the Eastern Pilbara region of Western Australia for potential lithium projects. In addition, CSA Global Pty Ltd ("CSA Global") has completed a desktop review of the Company's Eastern Pilbara projects, which concludes that the applications are prospective for lithium-bearing pegmatites.

Expansion of Lithium Projects in the Eastern Pilbara

In addition to the Company's existing Pilgangoora applications for exploration licences (E45/4693, E45/4694 and E45/4702), the Company has applied for a further six exploration licenses (Table 1) covering a total area of 531 square kilometres located in the Eastern Pilbara region of Western Australia.

Aggregate Area of 946 square kilometres

The Company now holds a total of 10 applications for exploration licences covering a total area of 946 square kilometres in the Pilgangoora district, the Eastern Pilbara, and the Mid-West region of Western Australia. Figure 2 shows the location of those applications in the Pilbara. The Edah Hill Project in the Mid-West is located further south, although not indicated in Figure 2.

CSA Global Desk Top Review

CSA Global has completed a desktop review, which concludes that the applications in the Eastern Pilbara, including an adjoining previous Pilgangoora application (E47/4702) are considered prospective for lithium-bearing pegmatites. CSA Global, a leading geological, mining and management consulting company have substantial experience in the field of industrial minerals exploration, including for lithium.

CSA Global reports that the applications contain similar geological settings to the Wodgina Tin-Tantalum (Ta-Sn) and Pilgangoora Lithium-Tantalum (Li-Ta) pegmatite deposits, which host the lithium projects of Australian Securities Exchange listed companies, Pilbara Minerals Limited and Altura Mining Limited.

The broader Eastern Pilbara district has been the subject of extensive historical exploration for a range of minerals and is known to host many granitic pegmatites such as those hosting the Pilbara Minerals Limited and Altura Mining Limited lithium projects. The largest concentrations of lithium-containing minerals, such as spodumene are found in pegmatites. Due to its lithium content and abundance, spodumene is considered the most important lithium-bearing mineral.

The new applications in the Eastern Pilbara were selected based on their geological attributes compared with the currently accepted exploration model for Lithium-Caesium-Tantalum (LCT) type rare element pegmatites. The tenements cover areas of potential pegmatite host rock sequences ('greenstone belts') and are located within 5-10 kilometres of interpreted syn- to post-tectonic monzogranite intrusions, which are the expected magmatic fluid source for the pegmatites. The fertile character of the monzogranites1, and potential link to lithium mineralisation, adjacent to and within the new applications is highlighted by the numerous occurrences of lithium (Li), tantalum (Ta), tin (Sn), and beryl (Be) associated with these monzogranites.

Next Steps

The Company with the assistance of CSA Global, will initially undertake geological reconnaissance to locate outcropping pegmatites. In areas of outcrop, pegmatites, intrusives, and host rocks, will be mapped to ascertain the mineral assemblages and rockchip sampled to determine key geochemical fractionation trends and lithium contents. Areas with subcropping potential host rock units, with no evidence of surface based pegmatites, will be soil sampled to locate geochemical haloes related to lithium-bearing pegmatites. Target areas under transported cover, will require drilling to sample bedrock and locate pegmatites and/or related geochemical aureoles.

Lithium Market

The global lithium market is growing rapidly due to developments in the technology and energy sectors, especially in the use of lithium-ion batteries for portable electronic devices, hybrid electric motor vehicles, and storage battery industries.

Industry experts comment that overall lithium demand may more than double from present levels through to 2025, while incumbent producers of lithium are limited in their ability to bring on additional supply to satisfy growing demand. Industry experts further comment that lithium has been one of the few commodities to enjoy recent price appreciation, and that they expect this pattern to continue over the next 10 years.2 The price of 99%-pure lithium carbonate imported to China more than doubled in the last 2 months to the end of December 2015, to US$13,000 a tonne.


CSA Global is a leading geological, mining and management consulting company whose staff includes geologists, mining engineers, project managers, data management professionals, and technical personnel. CSA Global has been operating from Perth, Western Australia since 1986. It is an independent company, with origins dating back to 1984 as part of the CSA Group founded in Ireland. CSA Global now has offices in the UK, Indonesia, Johannesburg, Vancouver, Darwin, and Brisbane. CSA has a high level of expertise in most mineral commodities gained from over twenty years' experience within the exploration and mining industry at an international level. It has experience in all stages of the mining cycle from project generation to production.

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