Growth-focused Western Australian nickel company St George Mining (ASX: SGQ) has provided its quarterly activities report for the period ended 31 December 2020.
Mt Alexander project
Deeper diamond drilling intersects targeted mafic-ultramafic rocks over a strike of more than 5km, increasing the prospectivity for the discovery of further nickel-copper sulphides.
Multiple off-hole electromagnetic (EM) anomalies identified by downhole EM (DHEM) surveys in deeper drill holes.
New DHEM anomalies are the deepest identified in the Cathedrals Belt and situated upto 800m north-west of known nickel-copper sulphides, indicating outstanding potential for a new discovery of high-grade mineralisation.
Petrographic analysis of drill core confirms the presence of intrusive rocks at depth that are very favourable for hosting significant deposits of sulphide mineralisation.
Positive interim results from metallurgical test work underway in Canada on the shallow, highgrade Stricklands deposit.
Preparations underway for inaugural drill programme in Q2 2021 pending completion of heritage survey.
Multiple strong targets prospective for copper and gold mineralisation.
Mt Alexander project:
Deeper drilling confirms prospective intrusive unit with strong EM conductors: Eight deep diamond drill holes were completed in Q4 2020 as part of a deep drilling programme along the Cathedrals Belt that was launched in June 2020.
The drill holes were designed to test the large conductive structure identified by Magnetotelluric (MT) and Audio-magnetotelluric (AMT) surveys completed earlier in 2020, as well as new EM conductors identified by DHEM surveys in recent drill holes.
All deeper drill holes intersected mafic-ultramafic intrusive-style rocksthat are similar to those known to host high-grade massive nickel-copper sulphides at shallow depths along the Cathedrals Belt.
This intrusive unit has now been confirmed by drilling to extend for a strike of more than 5km in an east-west trend along the Cathedrals Belt and down-dip for at least 600m. The unit remains open in all directions.
The drill hole data from MAD185, MAD192 and MAD193 was particularly significant, with each of these intersecting thick mafic-ultramafic rocks that included minor disseminated and blebby nickel-copper sulphides on the basal contact. Although not of economic grade, mineralisation of this kind is very significant as it may represent the halo around proximal massive sulphide mineralisation.