St George Mining Limited has intersected a very wide interval of continuous pegmatite in the first drill hole to test the ‘Manta’ seismic reflector at its Mt Alexander Lithium project in Western Australia.
The discovery is a 121m continuous pegmatite interval in diamond drill hole MAD213 whilst testing the Manta seismic reflector, with a total of 225m of pegmatites intersected in the hole.
The Manta seismic reflector is a prominent, large seismic reflector, occurring within a granite intrusion immediately north of the outcropping greenstone belt at Mt Alexander. Diamond drill hole MAD213 was drilled to test the source of the reflector and intersected multiple intervals of coarsely crystalline pegmatite.
The ongoing review of the seismic data and drill core from MAD213 confirmed the strong reflector is associated with the pegmatites. The reflector is modelled to continue up-dip to the south and appears to extend into, or below, the greenstone belt – a potentially favourable setting for mineralisation
The pegmatite intervals from MAD213 are being sampled for assaying to determine if there is any anomalous mineral or geochemical composition.
Further diamond drilling of the Manta pegmatites is planned to start in April to test the potential for mineral zonation of the pegmatites, within the greenstones at shallower depths.
This follows St George recently recommencing exploration activities – with latest assays for rock chips confirming more high-grade lithium bearing pegmatites up to 2.8% Li2O – and over 20,000m of total drilling expected to be completed through 1H 2023.
St George Mining’s Executive Chairman John Prineas said it is an exciting development for the lithium exploration at Mt Alexander.
“The early results from MAD213 are very encouraging with a large intersection of pegmatite that may be associated with significant structural activity.
“We are looking forward to further drill testing this very large pegmatite unit.”
