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De Grey Mining drilling continues to grow Hemi into a very large gold system

Published: 00:22 27 May 2020 EDT

De Grey Mining Limited - De Grey Mining drilling continues to grow Hemi into a very large gold system
Additional new discoveries are expected to be made along the prospective corridor

De Grey Mining Limited’s (ASX:DEG) drilling has confirmed significant mineralised extensions to the Hemi Discovery within the Mallina Gold Project in Western Australia.

Hemi continues to grow into a very large gold system with further wide, high-grade intervals at Aquila, where mineralisation remains open at depth.

Schematic section through Hemi (south to north - local grid)

Drilling to date shows the overall scale and dimensions of the shallow gold mineralisation across the combined Aquila, Brolga and Crow gold system remains open and currently extends over 1000 metres in width, 850 metres in strike and 300 metres in depth.

Stepout extension drilling continues across all three deposits to extend the limits of mineralisation and to assess the potential for a large tonnage, low strip ratio open pit mining scenario.

Aquila - significant results include:

  • 139.5 metres at 0.7g/t gold from 103.89 metres in HERC030D;
  • 113 metres at 0.8g/t gold from 70 metres in HERC070;
  • 27 metres at 2.7g/t gold from 152 metres in HERC039D; and
  • 13.4 metres at 3.5g/t gold from 266.67 metres in HERC041DW1.

Brolga - drilling results update expected next week.

Crow – About 40% of initial 5000-metre reverse circulation drilling completed, results pending.

Aquila Drilling Plan (local grid) showing drilling locations and new drilling results

Hemi is a new major gold discovery, where gold mineralisation is hosted in a series of intrusions associated with stringer and disseminated sulphide rich zones.

The style of mineralisation is new to the Pilbara region and shows a scale of mineralisation not seen in the project previously.

“Potential to be a world class discovery”

De Grey technical director Andy Beckwith said: “The scale and dimensions of the near surface mineralisation at Hemi continues to impress.

“The size of Hemi continues to grow with every drill program and we are also confident that additional new discoveries will be made along this prospective corridor.

“Western Australia is a Tier 1 mining jurisdiction, the project is surrounded by first class infrastructure close to Port Hedland and the project has the potential to be a world class discovery.”

Ongoing drilling

Reverse circulation (RC) and diamond core drilling are currently ongoing with three rigs operating between Aquila Brolga, and Crow testing for extensions of the gold mineralisation.

The aircore rig has commenced to the immediate south and south west of Brolga targeting extensions of the intrusion and associated sulphide-gold mineralisation.

Drilling to date has intersected further intrusion with variable weathered sulphide zones.

The Crow RC program is 40% completed. The remaining 60% is expected to be completed during late May and into early June. All results remain pending.

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