EL 29511 Mount Mary North Annual Technical Report 4

Abstract

EL 29511 Mt Mary North comprising 4 sub blocks (12.6sqkm) is located 150km north east of Alice Springs straddling the sheared regional unconformable contact between Palaeoproterozoic Aileron Province Ambulbinya Igneous Complex Bruna Gneiss (1750Ma) and onlapping /overlying Neoproterozoic Irindina Province metasediments/volcanics, Irindina Gneiss (810Ma) assigned to Harts Range Metamorphic Complex the upper amphibolite-granulite facie high grade metamorphic equivalent of Neoproterozoic-Cambrian sedimentary successions to north (Georgina Basin) and south (Amadeus Basin). The southern two blocks of licence area are dominated by three major north north west trending, uraniferous pegmatitoids (intruded waning stages of ASO, 330Ma) requiring further investigation. The largest of which closely parallels/ follows unconformity for 3km,up to 600m wide for about half its length before eventually pinching out and is also highly anomalous in niobium, thorium and rare earth elements. More importantly there lithium mineralisation potential has never been tested requiring further investigation. A fourth year program of regional pegmatite delineation through detailed analysis/interpretation of acquired large scale Google Earth images was undertaken identifying over 1000 potentially mineralised pegmatites very few of which have been analysed and/or prospected for (1) lithium and (2) amblygonite-spodumene-lepidolite mineralisation. Historic mica mining within these pegmatites attest to significant widths/volumes of pegmatitic material whose mineralogy and zoning is characteristic of LCT (lithium-cesium-tantalum) bearing pegmatites of which to date none have been assessed or sampled for lithium content.