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St George Mining buoyed after intersecting intrusive rocks at Mt Alexander nickel-copper prospects

A deep drilling program at Mt Alexander Nickel-Copper Sulphide Project has intersected intrusions at depth, confirming the prospectivity of the deposits.

St George Mining Ltd - St George Mining intersects intrusive rocks at the Investigators and Cathedrals Prospects
Two diamond rigs are operating along the Cathedrals Belt on a 24/7 basis

St George Mining Ltd (ASX:SGQ) has intersected promising intrusive rocks at depth during diamond drilling of prospects at its flagship high-grade nickel-copper sulphide project Mt Alexander in WA's north-eastern Goldfields.

Drilling has confirmed the down-dip continuity of the Cathedrals Belt intrusive system that is known to host the shallow high-grade nickel-copper sulphide mineralisation, extending the prospective area for potential nickel-copper sulphide deposits.

Deep diamond drilling at Investigators and Cathedrals prospects confirmed the prospectivity for nickel-copper sulphides at depth:

  • MAD180W1 at Investigators has been completed as a wedge hole from 520.5 metres to 877 metres and intersected intrusive-style rocks intercalated within a structural zone; and
  • MAD182 at Cathedrals has been completed to 700.4 metres downhole and intersected multiple mafic-ultramafic intrusive units, which are interpreted to confirm the continuation of the Cathedrals Belt at depth.

“Potential presence of further mineralisation”

St George executive chairman John Prineas said: “Drilling at depth continues to intersect an extensive intrusive network that is the control on the high-grade nickel-copper sulphides at the Cathedrals Belt.

“These drill results are positive for the potential presence of further mineralisation in the Cathedrals Belt mineral system.

“The new conductors identified from the DHEM in MAD179 again shows the success that can come from systematic and methodical exploration.

“We are pleased with the strong progress made by the St George exploration team in better understanding the large and complex mineral system at Mt Alexander.

“The drilling of exciting nickel-copper sulphide targets continues 24/7 with both diamond rigs at Mt Alexander operating on a double shift with two crews each.”

Schematic orthographic view of the Cathedrals Belt showing the interpreted target horizon, existing drilling and known massive nickel-copper sulphides.

Looking forwards

Diamond drilling continues at Investigators and at the Fairbridge prospect, with the following underway:

  • MAD181 is being drilled at Investigators to a planned depth of 800 metres to test a large conductive anomaly identified from the magnetotelluric (MT) and audio-magnetotelluric (AMT) surveys; and
  • MAD183 is being drilled at Fairbridge to a planned depth of 700 metres to test a large MT/AMT conductive anomaly identified from the MT/AMT surveys and located below numerous nickel-copper sulphide gossans.

In addition, downhole electromagnetic (DHEM) surveys are scheduled to be carried out in MAD180 and MAD182 this week, to search for conductive mineralisation around the current holes.

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on 28/11/19

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