Further high-grade nickel-copper sulphides confirmed down dip at investigators
Emerging Western Australian nickel company St George Mining Limited has announced that further high-grade nickel-copper sulphides have been intersected in drilling at the Mt Alexander Project, located near Leonora in the north-eastern Goldfields.
MAD112 was completed in the eastern section of the Investigators Prospect to test a discrete downhole EM conductor that had been modelled within a large bullseye SAMSON EM anomaly with a strike of approximately 200 metres.
The drill hole successfully intersected a prospective ultramafic unit between 102.9m to 116.65m downhole. Weakly disseminated nickel sulphide mineralisation (<1%Ni) is observed between 114m to 116.65m
Only a single line of holes (north-west) has been completed within the 200m east-west strike of the large bullseye EM anomaly at Investigators East, with three drill holes – MAD112, MAD32 and MAD33 – intersecting high-grade nickel-copper sulphides. With only this limited drilling, the EM anomaly remains underexplored and additional drilling will be planned to further test the continuity of the mineralised ultramafic – both along the east-west strike and at depth.
Significantly, the mineralised ultramafic in this area dips to the north and thickens at depth. MAD112 has confirmed massive sulphides 40m down dip from MAD33 and 120m down dip from MAD32.
The intervals of massive and disseminated sulphides in MAD112 imply a structural influence. There are breaks in the mineralised ultramafic, as evidenced by MAD24, but this does not exclude the potential for both additional mineralisation down dip and for structural thickening of the massive sulphide mineralisation.
A DHEM survey will be completed in MAD112 later this week to assist in identifying the extent of the massive sulphides around the drill hole and the potential for further down dip extensions of the mineralisation.
John Prineas, St George Mining’s Executive Chairman, said: “MAD112 was another big step-out from the known high-grade mineralisation in this area and has been successful in confirming additional massive sulphides down dip towards the north.
“As with MAD108, which was reported in our ASX Release of 23 July 2018, we are seeing more high-grade mineralisation at depth at Investigators. We are planning drill holes to further test these depth extensions to the north and north-west.
“With very little drilling here beyond 200m from the surface, we believe this is a compelling exploration area for further discoveries at Investigators.”