Great Boulder Resources Ltd (ASX:GBR) has received assays from the third round of reverse circulation drilling at Blue Poles discovery within Western Australia’s Whiteheads Gold Project, extending mineralisation along strike and at depth.
During the recent campaign, the exploration company intersected as much as 3 metres at 5.51 g/t gold, with the broader results defining supergene mineralisation over 700 metres of strike.
Interestingly, the latest assays indicate there’s potential for higher-grade, primary mineralisation at depth, implying a possible southern plunge component to the deposit.
Great Boulder says exploration at Whiteheads is far from over, with an aircore program over the broader project scheduled for September, while a reverse circulation campaign at the nearby Side Well Project should recommence imminently.
Drilling increases definition
Great Boulder managing director Andrew Paterson said: “This round of drilling has increased definition at Blue Poles and extended it further north, while also leaving a new, higher-grade zone open at depth and along strike to the south.
“We have now defined a broad, shallow cigar-shaped zone of supergene mineralisation up to 40 metres wide, with an apparent plunge to high-grade primary gold at the south end. We will be testing that hypothesis with more drilling soon.
“Exploration will now move on to finding more Blue Poles-style positions along the Arsenal Trend.
“The early results at Tektite are a good start, with untested potential south of that location.
“At Side Well, we are currently processing core from the recent diamond drilling program, and we have an RC program starting at Mulga Bill in the coming fortnight.”
Third time round
The latest assays mark the third reverse circulation campaign at the Blue Poles Discovery, where GBR recently drilled 18 holes for 2,545 metres.
Some of the best intersections include:
- 5 metres at 3.52 g/t gold from 181 metres, including 3 metres at 5.51 g/t from 181 metres;
- 47 metres at 1.18 g/t from 40 metres, including 19 metres at 2.09 g/t from 59 metres; and
- 11 metres at 1.64 g/t from 64 metres.
Overall, the main zone of supergene gold mineralisation at Blue Poles has now been extended to a strike of roughly 700 metres, with new holes improving continuity at the northern end.
Meanwhile, the 5.51 g/t intersection at the southern end indicates the potential for higher grade primary mineralisation at depth, implying a possible southern plunge component to the deposit remaining open to the south and at depth.
In addition, four holes drilled into the Tektite prospect, which lies 1,700 metres south on the Blue Poles trend, also intersected mineralisation, returning a best result of 4 metres at 1.99 g/t from 56 metres.
Looking ahead
With a third reverse circulation campaign at Blue Poles now under its belt, Great Boulder hopes to resume drilling at Whiteheads in September, with another aircore program testing regional targets along the Arsenal Trend, as well as elsewhere within the project.
A reverse circulation program will also kick off shortly at the Side Well Project near Meekatharra, continuing work on the high-grade Mulga Bill prospect.