St George Mining Ltd (ASX:SGQ) has revealed further intersections of lithium mineralisation, indicating the presence of a potentially valuable pegmatite system at the Jailbreak Lithium Prospect within the Mt Alexander Project in Western Australia.
New assays have returned further intersections of lithium with peak values of 1.77% lithium and 1.49% lithium, confirming the presence of mineralised pegmatites starting from or near the surface and extending to depths of up to 300 metres.
During the program, the company also identified anomalous lithium, caesium, tantalum and tin values up to 16 metres thick, indicating the potential for further mineralisation.
Jailbreak remains open at depth and along strike of current drilling, including to the south along the interpreted LCT corridor which extends towards the Mt Ida deposit of Delta Lithium Ltd.
Prospective horizon
St George executive chairman John Prineas said: “Assay results received to date continue to demonstrate the presence of mineralised pegmatites that commence from or near surface and continue to depths of up to 300 metres below surface.
“High grades have been observed, highlighting the potential of the pegmatite system that remains open at depth and along strike of the prospective horizon.
“The recent drilling has significantly increased the understanding of the distribution of pegmatites and lithium mineralisation along the prospective LCT corridor that is situated within St George’s tenure.
“A follow-up drill program will be planned once all drill results are received and interpreted with a focus likely to be the ultramafic sequence where the highest lithium values have been intersected so far.
“The Mt Ida province continues to evolve as a significant lithium region with Delta Lithium progressing development activities for its lithium resource and the Mt Bevan Project immediately adjacent to Jailbreak being explored under joint venture by Hancock Prospecting Pty Ltd, Hawthorn Resources (ASX:HAW) and the Indian Government backed Legacy Iron Ore.
“We look forward to providing a further update once final assay results are received.”
Drill highlights
The majority of the recent drilling was designed to follow up encouraging results from the initial 2022 drilling at Jailbreak as well as to test mineralised pegmatite outcrops identified from surface sampling.
These results indicate the host pegmatites appear to be part of a fractionated pegmatite system with potential for stronger mineralisation along strike and down dip from current drilling.
Drill results have also provided an increased understanding as to the controls on mineralisation and indicate that the priority target horizon is a north-south trending ultramafic sequence where the highest lithium values have been observed.
Focus of the follow-up activity will likely be on the southern extension of this sequence which remains relatively underexplored including mapped pegmatites that have yet to be tested by drilling.