Legend Mining Limited (ASX:LEG) has confirmed economic grades of nickel-copper-cobalt in assay results from a diamond drill hole at Mawson prospect within the Rockford Project in WA’s Fraser Range.
The assays are from two zones of heavy disseminated, semi-massive and massive nickel-copper sulphides and from three zones of massive nickel-copper sulphides.
Best result from the former was 10.4 metres at 1.32% nickel, 1.11% copper and 0.07% cobalt from 153.8 metres and from the latter was 12.8 metres at 2.76% nickel, 1.36% copper and 0.14% cobalt from 234.9 metres.
“This is paydirt”
The company’s managing director Mark Wilson said: "In simple terms this is paydirt.”
He said: “The results from the sulphide zones in hole 8 confirms economic grades of nickel-copper-cobalt.”
The diamond hole, RKDD008, was designed to test a strong 6,000-8,000S off-hole conductor identified by downhole electromagnetic (DHTEM) surveying.
This was interpreted to represent the down plunge extension of nickel-copper sulphide mineralisation identified in previous hole RKDD007 that returned 14.9 metres at 1.07% nickel, 0.75% copper and 0.06% cobalt from 114 metres.
Results from the five intervals of nickel-copper sulphides in the diamond hole.
Strong results
Another result from the two zones of heavy disseminated, semi-massive and massive nickel-copper sulphides was 5.8 metres at 0.97% nickel, 0.61% copper and 0.05% cobalt from 148 metres.
Also returned from the three zones of massive nickel-copper sulphides were 5.6 metres at 2.85% nickel, 1.86% copper and 0.15% cobalt from 199.4 metres and 6.9 metres at 2.55% nickel, 1.67% copper and 0.14% cobalt from 218.2 metres.
Mawson diamond drill hole locations on aeromagnetics.
Results show that the individual assay values for nickel and cobalt, and to a lesser degree copper, are relatively consistent throughout the massive sulphide intervals and reflects the uniform visual appearance of the sulphides.
Consistent grades
The consistent nickel-copper-cobalt grades of the sulphide intervals along with their combined thickness of 41.5 metres confirms the mineralisation intersected in RKDD008 as being “highly significant”.
Further sampling and assaying of disseminated sulphide intervals surrounding these intercepts will be undertaken and reported as they come to hand.
Future drilling will provide valuable geological, geophysical and geochemical data which will be incorporated into the Mawson 3D geological model.
Exploration update pending
Legend is still in a trading halt with an exploration update upcoming which Wilson said would detail the results from the next three diamond holes.
"We expect the exploration update announcement to be released pre-market on Wednesday, April 22, 2020,” he said.