Legend Mining Limited (ASX:LEG) has identified a strong offhole conductor at Mawson nickel-copper sulphides discovery on WA’s Fraser Range which managing director Mark Wilson describes as another “exciting development”.
Downhole electromagnetic (DHTEM) surveys within the discovery at the Rockford Project identified a strong 12,000-14,000S offhole conductor in drill hole RKRC013.
This is interpreted to be a northeast extension of Mawson mineralisation and will be tested by upcoming diamond drilling.
Wilson said: “The strength, size and location of the offhole conductor northwest of hole 13 make it a priority target when the diamond rig returns to site later this week.
"It is interpreted as the possible northeast extension of the mineralisation at Mawson and is an exciting development at this prospect.”
DHTEM surveying is ongoing in the recently completed reverse circulation (RC) drill holes.
The RC rig has completed a seven-hole baseline and has moved onto drilling four holes under priority aircore holes in the eastern aircore geochemical anomaly.
A diamond rig is mobilising to site later this week with the new conductor a priority target.
This program will focus on extensions to the known zone of nickel-copper mineralisation and the eastern geochemical anomaly.
The RC drilling was targeting a combination of known nickel-copper mineralisation in the west, a central gravity high and the southern baseline of the eastern anomaly.
DHTEM surveys have been completed in two holes - RKRC011 and RKRC013 - with the remaining holes to be completed during the week.
In RKRC011 DHTEM identified an inhole conductor associated with the semi-massive sulphide at 141 metres, which relates to the known upper mineralised zone in hole RKDD007.
A second offhole feature near the end of hole was also identified and correlates with massive sulphide mineralisation in holes 11 and 8.
In hole 13 the strong conductor was modelled to be near the contact between mafic/ultramafic intrusive to the west and metasediment/granulite to the east.
The position and orientation of the conductor also coincides with the interpreted extension of the main Mawson mineralisation to the northeast.
This is a compelling EM target given both its geological location and high conductance, and a 300-metre diamond drill hole has been designed to test it.
- Continue RC drilling program testing the eastern geochemical anomaly;
- Complete DHTEM surveying in all RC drill holes and process/interpret results;
- Recommence diamond drilling testing the RKRC013 DHTEM conductor, extensions of the known mineralised zone and the eastern geochemical anomaly;
- Complete infill aircore drill program across the greater Mawson area; and
- Ongoing integration of RC and aircore drilling results into the Mawson dataset to assist future diamond drill hole planning/design.