Visible mineralisation has been returned from the first three diamond holes drilled at the property east of Laverton.
With mineralisation open in all directions, numerous conductors remain to be drill-tested over a further 6.5 kilometres.
All drill results indicate that the Mt Venn mineralised system is large.
Three more diamond holes
Three more diamond holes will be drilled as part of the initial program.
One of these will be a wider diameter hole for metallurgical test work.
The company has also resumed reverse circulation (RC) drilling.
This will test for extensions to mineralisation identified in the phase I RC program as well as new magnetic conductors.
The new western magnetic zone will also be targeted.
Drilling more effectively targeted
Stefan Murphy, managing director, said: “We are still in the very early stages of this discovery but can more effectively target our drilling.
“This is based on what we now understand about the mineralised system and using electromagnetic and magnetic inversion modelling as an effective exploration tool.
“We now see the copper and nickel-cobalt rich phases occur together in the drill core, which is helping us understand more about the higher grade copper distribution.
“The combined RC and diamond drilling program will test the entire 9-kilometre Mt Venn intrusion, generating a significant amount of information over the coming weeks.”
Mt Venn background
In late 2015 Gold Road (ASX:GOR) drilled and assayed an RC drill hole on the edge of an electromagnetic anomaly, identifying copper-nickel-cobalt mineralisation at the Mt Venn prospect.
Great Boulder subsequently re-assayed the hole and confirmed primary bedrock sulphide mineralisation, with peak assay results of 1.7% copper, 0.2% nickel and 528 ppm cobalt.