Pilbara Acreage Package
Macarthur’s Pilbara lithium tenements comprise of 15 exploration licenses that are prospective for ‘hard-rock’ lithium.
Macarthur has 15 Exploration Licenses in the Pilbara covering a total area of approximately 1,300km2.
In May and June 2016, Macarthur completed two heliborne reconnaissance field trips across a portion of its tenements in the Pilbara region. Sampling across several pegmatites yielded encouraging results warranting further exploration. The best lithium results are from a swarm of pegmatites within Exploration Licence application 45/4702 exploited in the past for tin and tantalum. A sample of lithium muscovite from one old working returned 0.2% Li2O and elevated tantalum and tin values confirming the rare element character of this pegmatite. A feldspar-quartz-muscovite pegmatite within Exploration Licence 45/4711 also returned 111 parts per million (“ppm”) lithium (“Li”).
In addition to the reconnaissance sampling, historical results of the Geological Society of WA (“GSWA”) include the Tambourah North lithium pegmatite located in Exploration Licence application 45/4848. A rock sample collected by Fortescue Metals Group Ltd in 2012 on the western edge of Exploration Licence application 45/4702 returned a result of 876 ppm Li (0.19% Li2O).
Western Australian Lithium Strategy
The current strategy for Macarthur regarding Lithium
Macarthur is focussed on the acquisition and development of high quality lithium projects. Macarthur is currently evaluating its tenure and commencing discussions with various third parties concerning potential joint ventures to maximise the exploration effort throughout 2017.
The results of the reconnaissance trips across the Pilbara, Yalgoo and Ravensthorpe tenure have identified several pegmatitic bodies, some containing lithium minerals that warrant further exploration efforts across each region. Based on these results, MLi is focussing on refining an exploration strategy that will involve broader scale mapping of pegmatite outcrops; further rock sampling to determine lithium mineralisation, fractionation state and fractionation trends; as well as localised intensive sampling of soil to detect geochemical haloes associated with a lithium-bearing pegmatite. The results of such activities will inform drill targets to explore the degree and extent of lithium mineralisation as well as obtaining material for process test-work.