Legend Mining Limited has identified a very strong offhole conductor during downhole electromagnetic (DHTEM) surveys at the Mawson discovery within the Rockford Project on WA’s Fraser Range.
The 25,000-30,000S offhole conductor defined during DHTEM surveying of hole RKDD021 is twice as strong as the 12,000-14,000S that the hole was designed to test.
This conductor is interpreted to be the extension of the lower 15.35 metres of net textured, heavy disseminated, and semi-massive nickel-copper sulphides intersected in the hole.
“Exciting days ahead”
Legend managing director Mark Wilson said: “The new offhole conductor from hole 21 is modelled as double the strength of the conductor which hole 21 was designed to test.
“The geological interpretation that this conductor is the extension of the 15.35-metre interval of significant sulphides in hole 21 coupled with its strength, point to some exciting days ahead.
“The diamond hole to test this conductor will be the next hole drilled once the rig completes the diamond tail on RC hole 15.”
Diamond hole RKDD021 was completed to a depth of 482.3 metres and intersected two intervals of nickel-copper sulphide mineralisation across two intrusive packages separated by a metasedimentary unit.
The position and orientation of the conductor fits with the structural analysis of the interpreted extension orientation of the main Mawson mineralisation.
Diamond hole planned
Diamond drilling of the new offhole conductor will begin after Legend completes the current diamond hole. The hole is planned to a depth of 300 metres downhole.
Structural analysis of RKDD021 has been completed, with the drill core scheduled for sampling and assaying.
Hole 22 completed
The company has finished drilling diamond hole RKDD022 to a depth of 333.9 metres downhole.
This hole encountered a highly prospective intrusive package including pyroxenite, troctolite, gabbronorite/norite and anorthosite from 101.4 to 232.8 metres, including semi-massive and vein sulphides from 174.65-175.4 metres, before finishing in metasediment and mafic granulite.
Importantly, the intrusive complex extends south of the main Mawson mineralisation as interpreted, increasing prospectivity for mineralised intrusives.
Future work
Future programs at Mawson include:
- Ongoing diamond, RC and aircore drilling;
- Ongoing DHTEM surveying in diamond and RC drill holes;
- Structural logging of RKDD022 drill core by Jon Standing from Model Earth;
- Report assays from samples as received; and
- Integration of diamond, RC and aircore drilling results into the Mawson dataset to assist 3D modelling and future diamond drill hole planning/design.