Great Boulder Resources Ltd (ASX:GBR) has intersected high-grade gold in two of the first three reverse circulation (RC) holes drilled at the Ironbark prospect, situated within the Side Well Gold Project near Meekatharra in Western Australia.
To date, assays have been received for three of the seven holes drilled at the Ironbark discovery east of Mulga Bill including:
- 22 metres at 2.47g/t gold from 38 metres, including 4 metres at 6.68g/t g/t from 39 metres;
- 14 metres at 4.25g/t from 104 metres, including 8 metres at 5.96g/t from 108 metres; and
- 2 metres at 1.33g/t from 128 metres.
Looking ahead, assays for the remaining holes at Ironbark are expected in the coming weeks, and more drilling will be completed as part of the upcoming program expected to commence at the end of June.
“Significant strike potential”
GBR managing director Andrew Paterson said: “This is a great result for our first RC program at Ironbark.
“In contrast to Mulga Bill, Ironbark is not concealed beneath alluvial cover, and we were able to make this discovery last year using auger soil sampling followed by air-core drilling.”
“We now have high grades in two of the first three RC holes, with broad down-hole intervals at relatively shallow depths.
“Hole 22IBRC007 is the southern-most hole drilled so there is definitely scope to extend this further south.
“Our drilling to date is on lines 100 metres apart, and these two intersections are 300 metres apart so there is significant strike potential.”
Geological logging
GBR's geological logging of the RC chips indicates a zone of deeper weathering striking north-northeast through Ironbark, coincident with gold mineralisation.
This observation, together with the multielement geochemistry, suggests Ironbark is a structurally controlled orogenic system.
The deeper weathering means these intersections are in partially weathered rock, but they are likely to relate to primary mineralisation at depth.