St George Mining Limited (ASX: SGQ) has announced promising soil sampling results at its flagship Mt Alexander Project in Western Australia.
John Prineas, St George Mining’s executive chairman said: “We are very pleased with the results of the latest soils programme, which delineated not just one but a series of strong kilometre-long lithium soil anomalies in areas not yet drill tested for lithium. The consistency and cohesiveness of the lithium values within these large-scale anomalies is impressive. The coincident pathfinder elements like tantalum and caesium as well as the extensive pegmatite outcrop make these areas compelling drill targets.”
St George completed a geochemical soil survey over two broad areas at Mt Alexander. The included zones within tenements E29/638, E29/1143, E29/962, and P29/2680. The soil survey followed on from drilling in late 2022 and early 2023 at the Jailbreak Prospect – within E29/638 and E29/962 – that confirmed the presence of lithium mineralized pegmatites at or near surface and up to depths of 300m below surface. High grades – up to 1.8% Li2O – were returned in the drill results, highlighting the potential of the pegmatite system. The soil survey also included areas on E29/1143 and P29/2680, tenements acquired by St George in late 2022. St George believes this soil sampling is the first ever systematic exploration for lithium at these tenements.
Mt Alexander Project map showing soil survey areas and the interpreted contact between the greenstone sequence and the Copperfield Granite overlying TMI magnetics imagery. The survey area in the south represents a 4km-long zone along strike from were drilling by St George has already intersected multiple lithium bearing pegmatites at Jailbreak. The larger survey area in the north covers more than 10km of the contact between the Copperfield Granite and the Mt Alexander ultramafic sequences, including a large zone around the Manta Prospect where a 121m thick pegmatite was intersected in drilling by St George.
“Drilling approvals are in place and we look forward to testing these promising targets very soon. The lithium exploration programme at Mt Alexander is part of St George’s disciplined and well-funded approach to advancing our portfolio of high-quality projects through the commodity cycle and positioning our assets for the resurgence in battery metals market conditions.”
The soils programme: The survey was completed on a minimum spacing of 200m x 100m, with a total of 1,421 soil samples collected. Samples were assayed at LabWest using the Ultrafine technique. Analysis used the <2µm Ultrafine+ method for 53 elements including lithium and pathfinder elements such as caesium, tantalum, rubidium, niobium, and tin.
The soil anomalies delineated from the sampling results. The soil anomalies represent areas with >100ppm Li2O – considered highly anomalous using the soil sampling technique. The numbers attributed to each anomaly to correspond to the numbers in the summary below.
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