THE DRILL SERGEANT: De Grey Mining (ASX: DEG) continues to increase the company’s recent Hemi gold discovery just outside of Port Hedland in Western Australia.
De Grey Mining has defined three broad anomalous gold in bedrock anomalies, Aquila, Brolga and Crow, by way of aircore drilling at Hemi.
The company has had RC and diamond drilling underway at Brolga and Aquila since February 2020, which has confirmed considerable gold mineralisation at both deposits.
At Brolga, the gold-sulphide mineralisation has been defined over 640 metres strike length, up to 300m width and to a maximum depth of approximately 300m.
Recent gold extensions defined by diamond and RC drilling at Brolga, include:
15 metres at 2.4 grams per tonne gold from 40m, and 38m at 1.6g/t gold from 168m; and
HERC037D (Precollar only)
29m at 1.1g/t gold from 148m.
Mineralisation remains open and further drilling is continuing to establish the extent of gold mineralisation.
Aquila is a parallel gold-sulphide zone to the immediate north of the larger Brolga zone.
RC and diamond drilling has also established gold mineralisation over a strike of 800m, up to 50m width and to a maximum depth of approximately 300m.
Recent gold extensions defined by diamond and RC drilling, include:
16.2m at 3.3g/t gold from 249.3m, 8.95m at 1g/t gold from 303m, and 6.2m at 2g/t gold from 344.8m;
6m at 2.4g/t gold from 80m; and
26m at 1.5g/t gold from 83m.
Gold mineralisation remains open.
The Crow Zone is a recently-define large gold zone located immediately to the north of Aquila where De Grey commenced deeper RC drill testing in April 2020.
Results for five of six holes remain pending and are expected towards the end of April.
Further RC and diamond drilling is ongoing to test the scale of each deposit with the overall aim to delineate the overall extent of each deposit prior to an initial Inferred resource estimation.
The overall scale of Hemi continues to grow, with three large gold zones in Aquila, Brolga and the new Crow defined to date,” De Grey Mining technical director Andy Beckwith said in the company’s announcement to the Australian Securities Exchange.
“Our immediate plans are to continue the 80m by 80m step-out resource drilling at all three areas Brolga, Aquila and Crow with one RC and two diamond rigs active.
“We have a further four other significant intrusions in the immediate area, Scooby, Antwerp, Shaggy and Alectroenas over a strike length of 15 kilometres still to test.
“The metallurgical program has commenced with an initial emphasis on defining the oxide, transition and fresh domains and completion of a suite of comminution, leaching, sulphide flotation and oxidation test work.
“We expect this work will provide overall recoveries for each domain and define a potential plant processing flowsheet.”