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Location: 100 km E from Kalgoorlie, Western Australia, Australia
Level 1, 16 Ventnor AvePerthWestern Australia, Australia6005
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The mineralisation at Manna is characterised as lithium-caesium-tantalum type (LCT) pegmatite swarms. The greenstone sequences within the vicinity of the Manna lithium deposit are dominated by mafic and felsic-intermediate igneous rocks, with minor sedimentary rocks, of the Kurnalpi Terrane of the Archean Yilgarn Craton. It is thought that the LCT pegmatite swarms, which includes the Manna lithium deposit, is likely to be associated with the Cardunia granitoid body.Mineralisation at Manna remains open along strike in both directions and at depth. Forty-six sets of anastomosing pegmatite veins were interpreted and 16 of these, which contain significant lithium mineralisation, were used with the mineral resource model.DimensionsThirty-five anastomosing pegmatites have been identified at the Manna deposit which extend from surface to a depth of 500 m.The pegmatites strike northeast-southwest and dip to the southeast at 60–70°.The main area has 16 mineralised pegmatites and has been drilled over an area of 1,700 m x 400 m. In the East zone, four mineralised pegmatite veins are delineated to the southeast of the main set, and have been drilled over an area of 1,400 m x 400 m and to a depth of 200 m. The West zone, to the northwest of main, includes 15 mineralised pegmatites and has been drilled over an area of 725 m x 250 m and to a depth of 500 m. The individual mineralised pegmatites are 1–14 m thick and have an average true thickness of 3.6 m.
