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Legend Mining produces premium nickel and copper concentrates in Mawson metallurgical tests

The nickel concentrate was particularly desirable due to the high Fe:MgO ratio with no other deleterious elements.

Legend Mining Limited -
Copper and nickel concentrate from the Mawson sulphide samples

Legend Mining Ltd (ASX:LEG) has received positive phase-1 metallurgical test-work results on samples from diamond drill hole RKD034 at Mawson prospect within the Rockford Project, demonstrating recovery of up to 98% copper and 97% nickel.

Strategic Metallurgy Pty Ltd was engaged to conduct preliminary flotation test-work to assess the ability to produce saleable nickel and copper concentrates from Mawson massive sulphide.

Test-work utilised depression of iron sulphides to selectively float separate copper and nickel concentrates and the flotation regime utilised common flotation reagents, similar to that used at IGO Ltd’s (ASX:IGO) nearby Nova Nickel Mine.

“Premium concentrates can be produced”

Managing director Mark Wilson said: “The results of this first met test-work have demonstrated that premium nickel and copper concentrates can be produced by conventional means from Mawson samples.

“This successful outcome has significantly advanced and de-risked our project.”

Shares have been as much as 9 per cent higher in early trade to 13 cents.

Test highlights

Notable highlights from the test-work include confirming that Mawson massive sulphide responds well to conventional flotation:

  • Rougher recovery up to 98% for copper and 97% for nickel was achieved;
  • Selective flotation demonstrated the ability to produce separate saleable copper and nickel concentrates – copper concentrate 31.8%, nickel concentrate 13.1%;
  • Nickel concentrate highly desirable to market due to high Fe:MgO ratio (>300) with no other deleterious elements noted; and
  • Optimisation expected to yield further improvement on current results.

Future programs

  • Finalisation of diamond and reverse circulation (RC) drill hole design for 2021 field season at Mawson;
  • Field logistics underway for the commencement of field season at Mawson; and 
  • Integration of DD, RC, aircore geochemical and geophysical datasets to evolve 3D emplacement model of Mawson, with new constrained gravity and magnetic inversions underway.

Quick facts: Legend Mining Limited

Price: 0.13 AUD

Market: ASX
Market Cap: $358.17 m

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Legend Mining says metallurgical test-work has de-risked Mawson prospect

Legend Mining Ltd's (ASX:LEG) Mark Wilson caught up with Proactive's Andrew Scott after receiving positive phase-1 metallurgical test-work results on samples from diamond drill hole RKD034 at the Mawson prospect. They demonstrated recoveries of up to 98% copper and 97% nickel. Wilson says the...

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