De Grey continues to reap the rewards of spinning the drill bit at Hemi
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Special Report: The sky appears to be the limit for De Grey’s Hemi gold discovery with drilling continuing to extend the scale of the Brolga zone.
Extensional and reverse circulation drilling at Brolga continues to define thick zones of gold mineralisation with hits such as 26.9m grading 1.5 grams per tonne (g/t) gold from a depth of 269m and 19m at 2.7g/t gold from 203m including 3m at 14.7g/t gold from 203m.
Results above 5g/t gold are generally considered to be high-grade.
De Grey Mining (ASX:DEG) added that drilling of the new southern extension, which covers about 1000m by 200m, has returned further hits of 5m at 1.1g/t gold from 59m and 15m at 1.1g/t gold from 223m in the same hole.
This zone was defined by wide-space aircore drilling that returned results of 16m at 2.4g/t gold from a depth of 40m and 4m at 5g/t gold from 60m.
Additionally, shallow aircore drilling has potentially extended the Brolga zone by 160m to the west with a hit of 16m at 1.89g/t gold from 48m.
“The potential for Brolga to expand continues to grow with an 80m x 80m RC program currently underway at Brolga (South) and Crow,” technical director Andy Beckwith said.
“At Crow, the initial program of 160m x 80m spaced RC drilling has recently been completed with results expected in the coming weeks. Diamond drilling is currently focused on depth extensions beneath Aquila.”
Any company would be happy with the results that De Grey has received to date but there are tantalising hints that there is more to come.
The recently completed airborne magnetic survey has been reviewed and the company has identified four new clusters with at least 16 individual new intrusive targets within the Greater Hemi corridor.
In addition, the review also assessed the previously flown magnetic surveys elsewhere along the 150km Mallina project area and generated over 20 new targets that warrant further investigation.
Beckwith says the company’s next 12 month drilling strategy involves drilling to define inferred resources at Hemi before infill drilling is carried out to defined higher certainty indicated resources, which has sufficient information on geology and grade continuity to support mine planning.
Aircore drilling will also be carried out for new discoveries along the Greater Hemi corridor and testing the many structural and new intrusion targets elsewhere within the Mallina project.
“Two RC rigs and two diamond rigs are operating at Hemi and two aircore rigs are advancing at Scooby and Antwerp prospect areas.”