Prodigy Gold NL has provided an update on diamond drilling underway on the Lake Mackay Project.
The Lake Mackay Project is held in Joint Venture (JV) with IGO Limited, with IGO holding a 70 per cent JV interest in the tenements and Prodigy Gold holding a 30 per cent JV interest.
The project is positioned approximately 400 kilometres northwest of Alice Springs, adjacent to the Western Australian border, and comprises approximately 15,630 square kilometres of exploration licences and applications.
The project has consolidated tenure over the favourable Proterozoic margin between the Aileron and Warumpi Provinces and is characterised by a continent-scale geophysical gravity ridge and the Central Australian Suture.
Prodigy Gold outlined that the previous discovery of the Grapple, Bumblebee, Phreaker, Arcee and Goldbug Prospects since 2015 has upgraded the prospectivity of the western Aileron Province and Warumpi Province for base and precious metal mineralisation.
The current campaign includes diamond drilling of electromagentic (EM) conductors thought to be associated with base metal mineralisation at the Phreaker Prospect, and the Raw and Customisable Targets, and potentially additional RC drilling of a geochemical anomaly at the Raw Target.
Two diamond drillholes have been completed at the Phreaker Prospect so-far in 2021, with the second hole intersecting a wide interval of sulphides.
21PHDD002 Coarse-grained disseminated chalcopyrite and pyrrhotite in foreground and massive chalcopyrite and pyrrhotite with lesser arsenopyrite in the background. Image courtesy of Prodigy Gold and IGO.
Prodigy Gold’s Managing Director, Matt Briggs, said that previous significant mineralised intersections at the Phreaker Prospect have been around 10 metres at about 1 per cent copper [1].
“The current diamond drilling program is targeting 150 metres down dip of existing drilling, testing for thicker higher grade parts of the system. Downhole EM (DHEM) completed during the last RC program indicated that the strongest part of the EM conductor is below the depth of the RC holes,” Mr Briggs said.
“The second diamond hole drilled at the prospect has intersected a 44.4 metres mineralised interval. This interval includes a total of 12.4 metres of semi-massive sulphide breccia, 10.5 metres of stringer sulphides and 7.7 metres of disseminated sulphides. This hole, and DHEM surveys of previous drilling, indicate the strong conductor continues at depth.”
Mr Briggs said drilling near-surface has already confirmed mineralisation extends for at least 750 metres of strike [1].
He noted that the mineralisation recently drilled appears similar to that previously intersected at the Phreaker Prospect, but occurs over a much wider zone giving the JV the confidence to test the large EM conductor at greater depths.
“Drilling is now underway on a third hole collared 170 metres to the west of 21PHDD002, targeting mineralisation a further 150 – 200 metres down dip,” Mr Briggs shared.
“The Raw and Customisable EM targets will be tested with co-funded drilling once drilling at the Phreaker Prospect is completed.”
Disseminated and semi-massive sulphide in 21PHDD002 ~570.6-580.7m downhole. Image credit: Prodigy Gold and IGO.
Phreaker Drill Program
Two diamond holes were designed to drill the down-dip potential of mineralisation at Phreaker. These holes were planned to intersect mineralisation 150 metres below previous Reverse Circulation (RC) drilling.
The first hole drilled, 21PHDD0001, significantly shallowed in dip intersecting the mineralisation approximately 75 metres down dip of previous RC holes.
The hole intersected 7 metres of semi-massive and disseminated sulphide from 477.9 metres downhole and is visually similar to previous intersections [1] from the Phreaker Prospect.
Diamond drill hole 21PHDD002, drilled 400 metres to the east of 21PHDD001, has intersected the sulphide mineralisation 563 metres downhole, approximately 475 metres vertically below surface.
Within a downhole interval of 44.4 metres and estimated true thickness of approximately 28 metres, the mineralisation consists of intermittent deformed (sheared/brecciated) coarse-grained massive to semi-massive sulphide intervals of up to 6.3 metres, interspersed amongst stringer and disseminated sulphides.
The main sulphide phase includes pyrrhotite (Fe), chalcopyrite (Cu), sphalerite (Zn) and arsenopyrite (As). Downhole EM will be completed on 21PHDD002 while drilling of a third hole 170 metres to the south is underway.
[1] More Copper and Cobalt intersected at Lake Mackay and promising new prospect identified – 17th July 2019.
