Great Boulder Resources Ltd (ASX:GBR) has intersected more high-grade gold at the Mulga Bill deposit of the flagship Side Well Gold Project near Meekatharra in Western Australia, proving the continuity of mineralisation over a total strike length of 1,100 metres.
The high-grade gold intersections such as 6 metres at 30.96 g/t gold from 113 metres, including 1-metre at 173.50 g/t, are from Phase 3 reverse circulation (RC) drilling testing the gap between the Central and HGZ resource areas at Mulga Bill, an area that had been relatively poorly tested and is outside of the current mineral resource.
A total of 17 RC holes were drilled for 3,870 metres in this campaign, while resource definition drilling continues at Mulga Bill in preparation for the pending Mulga Bill and Ironbark resource update.
Drilling within the gap intersected mineralisation within sub-vertical shear-hosted or 'Malvern' lodes as well as west-dipping vein-hosted 'Cervelo' lodes.
This is the same combination of structures as seen within the mineral resource areas to the north and south. Great Boulder, therefore, expects that the same orientations are likely to control mineralisation at Mulga Bill North.
The Cervelo veins intersected at depth are more than 300 metres long, open along strike and down dip.
The RC results also include 8 metres at 5.71 g/t gold from 216 metres, including 3 metres at 13.84 g/t, and 7 metres at 4.94 g/t from 129 metres.
RC drilling is on track to be completed this week — the RC rig is now completing a small Phase 4 program to fill in a few gaps in the data prior to the next mineral resource update expected.
With gold and multi-element assay turnaround currently averaging about three weeks, the company says all data should be received by the first week of October.
Heritage surveys at Ironbark
Heritage surveys are set to begin next week over the new high-priority regional targets defined within the 14-kilometre Ironbark Corridor as Great Boulder prepares for maiden drill testing in the upcoming quarter.
Managing director Andrew Paterson said that this was an important step forward for Great Boulder, as it set the stage for a big regional aircore drilling campaign to test this extremely prospective zone in the months ahead.
Updated mineral resource estimate
While the drilling and assay data is being collated, the company’s geologists will start updating the mineralisation envelopes for Mulga Bill and finalise those for Ironbark.
The company confirms that it is on track to deliver an updated resource estimate for the Mulga Bill and Ironbark prospects at the end of October. It says all data and wireframes are on track to be delivered to the resource estimation consultant in mid-October.