De Grey unearths further thick, high-grade gold at Hemi, Mallina

De Grey Mining Limited (ASX: DEG) continues to announce more positive updates from the follow up aircore drilling at the Hemi Prospect within its Mallina Gold Project in WA.

The company reported that additional thick and high-grade gold mineralisation was intersected on Section A of Hemi prospect, consolidating a significant 30m wide gold zone to 130m depth, open in all directions.

Important hits include 44m @ 5.1g/t Au from 40m, including 13m @ 8.8g/t; and 46m @ 6.6g/t Au from 92m, including 21m @ 8.3g/t.

These results correlate strongly with previously announced results on 6 Feb 2020, which included 24m @ 7.5g/t Au from 126m.

Mallina gold project

De Grey’s Mallina Gold Project is located 60km south of Port Hedland in the Mallina Province of Western Australia.

The 1.7 Moz Mallina project hosts numerous large deposits. Significant gold deposits include Withnell, Mallina, and Toweranna. Other prospects include Hemi, Antwerp, and Scooby prospect.

Aircore drilling program at Hemi

The company had recently commenced an aircore drilling program at the Hemi Prospect.

The program was aimed at better defining the recent high-grade gold mineralisation on the 640m spaced sections as well as infilling lines to establish 320m x 80m spaced drilling.

Significant mineralisation from earlier drilling

At Section A of the Hemi prospect, high-grade results were previously announced results on 6 Feb 2020. Highlights included 24m @ 7.5g/t Au from 126m in BWAC315, including 18m @ 8.6g/t (EOH); 49m @ 3.7g/t Au from 65m in BWAC309, including 18m @ 6.6g/t; and 36m @ 4.0g/t from 39m in BWAC245, including 11m @ 8.9g/t.

Further results reported

The company has now reported the aircore drilling results for a further 20 holes (BWAC316 – BWAC335) completed on the initial discovery Section A of Hemi prospect together with initial results from the 320m spaced infill line (halfway between sections A and B).

Thick, high-grade gold intercepted

The company has announced encouraging assay results from the detailed infill holes BWAC320-321 on Section A, the 80m spaced infill drilling along Section A and approximately 60% of the holes in Section C (320m spaced drill section halfway between Section A and B) in Hemi prospect.

Section A

The company reported that the new drill results correlate very well with the previously reported gold mineralisation, confirming a substantial steeply south dipping zone of high-grade gold mineralisation.

DEG said that the mineralisation is defined as 30m wide (apparent thickness), extends to 130m below surface, remaining open at depth and along strike.

The company reported that the weighted average grade of all results within the mineralised envelope on Section A is 5.2g/t.

Significant intersections from Section A include 44m @ 5.1g/t Au from 40m in BWAC320, including 13m @ 8.8g/t; and 46m @ 6.6g/t Au from 92m in BWAC321, including 21m @ 8.3g/t.

Section C

De Grey reported that step out aircore drilling is underway over a 2.5km strike length on a nominal 320m x 80m drill spacing in Section C of Hemi prospect. Section C is located halfway between Sections A and B.

The company said that the result for approximately 60% of the holes along Section C has been received, with the most significant zone to date comprising a broad zone of mineralisation intersected in hole BWAC333.

Significant new results on Section C include 8m @ 1.4g/t Au from 44m in BWAC333; and 20m @ 0.9g/t Au from 88m in BWAC333.

DEG reported that this new gold zone represents a large and broad lower grade zone of 79m @ 0.5g/t including 8m @ 1.4g/t and 20m @ 0.9g/t.

The company noted that this zone is considered significant and encouraging, as the drilling is widespaced and fully overlapping holes are still to be completed.

Pending Results

DEG reported that a further 39 aircore holes have been completed (BWAC336 to BWAC374) with those results pending. The company said that the drilling was delayed due to Cyclone Damien and is expected to recommence shortly.

What’s next?

De Grey reported that Cyclone Damien has now dissipated and the Company is assessing access conditions to the Hemi Prospect.

The company said that the aircore, RC and diamond rigs are all available and ready to be remobilized at short notice.

Management statements

De Grey’s Technical Director, Andy Beckwith said: “These are stunning results – high grade, thick and consistent. Clearly, drilling below this zone and the mineralisation on Section B are two key high priority RC targets.

We are looking forward to receiving the remaining aircore drilling results and re-commencing drilling activities now the cyclone has dissipated.”

Written By Jonathan Norris
Jonathan is a founder of and has been covering the resources industry since 2018. With over 17 years experience in print, broadcast and online media, Jonathan has seen first hand the transformative effect of online niche media.