St George Mining Limited (ASX: SGQ) has announced a very wide interval of pegmatite intersected in the first drill hole to test the ‘Manta’ seismic reflector at the company’s Mt Alexander Project, in Western Australia’s Goldfields.
The Manta seismic reflector is a prominent, large seismic reflector – modelled as a saucer shape with a diameter of approximately 1,000m – occurring within a granite intrusion immediately north of the outcropping greenstone belt at Mt Alexander. Manta is located within Exploration Licence 29/638, held 75% by St George and 25% by IGO (ASX: IGO).
Diamond hole MAD213 was drilled to test the source of the reflector and intersected multiple intervals of coarsely crystalline pegmatite including:
- a continuous 120.8m interval of pegmatite from 631.2m to 752m downhole; and
- multiple additional pegmatite intervals of varying width from 369m to 624m downhole
The ongoing review of the seismic data and drill core from MAD213 by consultants Rock Solid Seismic 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 next month to test the potential for mineral zonation of the pegmatites, within the greenstones at shallower depths.
“This is an exciting development in our lithium exploration at Mt Alexander,” executive chairman John Prineas said.
“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.”
