Great Boulder Resources Ltd (ASX:GBR) has received initial results from a recently completed high-resolution gravity survey at its Whiteheads Gold Project that confirms the regional potential of the Arsenal Trend.
The survey has confirmed a large low gravity feature striking south from outcropping granite in the north-eastern corner of the project, coincident with the position of the Arsenal Trend gold-in-soil anomaly.
This feature explains the broad, coherent gold anomalism found at surface along the Arsenal Trend as wherever mineralising fluid encounters a suitable setting to reduce fluid temperature such as a sudden pressure drop, or an increase in pH, the gold may precipitate.
The company believes this also explains the location of the Blue Poles prospect.
“Theory supported by data”
Great Boulder managing director Andrew Paterson said: “It’s very encouraging to see our initial theory about Arsenal supported by the new gravity data.
“There are two key takeaways here.
“Firstly this explains the location and scale of gold anomalism on the Arsenal Trend.
“Secondly it reinforces our view that the southern extension of Arsenal – currently a 7 kilometre gap in the exploration data – is equally prospective."
The Arsenal trend low gravity corridor (red outline) is interpreted to be caused by a granite at depth.
Next steps
A reverse circulation drilling program is scheduled for Blue Poles in the second half of March to infill and extend the zone of primary gold mineralisation.
Aircore drilling is being planned to test the lookalike auger anomaly north of Blue Poles and is expected to be completed during April.
Any high-priority nickel targets will need to be tested with an aerial EM (electromagnetic) survey prior to planning drill testing.
Paterson said: “We’ve no soil geochemistry or drilling at all in that area between Blue Poles and Four Dudes.
“That will be a key target for early-stage exploration going forward.
“Our early petrography work at Blue Poles identified widespread alteration, so we knew we were dealing with a large system.
“But the scale of this fluid pathway does indicate a much larger target than previously thought.
“We’re still poring over the gravity data looking for nickel targets.
“I expect to have another update for the market in the next couple of weeks.”