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Location: 85 km NE from Porto, Portugal
Rua José Eigenmann n. 90, NogueiraBragaPortugal4715-199
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The Barroso – Alvão Region is characterized by the presence of a large field of several dozen pegmatite and aplite-pegmatite dykes of granitic composition. Pegmatite dykes are mainly intruded in the granitic rocks of the region whilst aplite-pegmatite dykes are hosted by low- to medium-grade metasedimentary rocks of Silurian age that are strongly deformed (B. CHAROY et al.,1992). The thickness of these dykes ranges from less than 1m up to 50m.The Li-rich aplite-pegmatite dykes show a spatial distribution of 3 sub-types (LIMA et al, 2003):- Spodumene-rich aplite-pegmatite dykes and sills are dominant at N and NE regions;- Petalite-rich are dominant at SW; and- Lepidolite-rich occur at NW regions.The Mina do Barroso Project is centred on a series of spodumene rich aplite-pegmatite dykes and sills which have formed the basis of this study.Grandao Deposit: Mineralised zone over 500m long, 450m wide and pegmatite depths of up to 50m. Results from recent drilling has recorded the broadest and most significant results for the Project to date.Reservatorio Deposit: Drilling has confirmed that the lithium mineralisation extends to over 400m strike length, with good down dip extensions of at least 100m.NOA Deposit: Drilling has confirmed the presence of lithium mineralisation over a 200m strike length together with good down dip extensions of at least 50m.
