Great Boulder Resources (ASX: GBR) has released an initial Exploration Target for intrusive-related copper-gold-silver mineralization at the Side Well Gold Project near Meekatharra in Western Australia.
“We have been working on this process for several months, identifying copper-rich intervals in the pXRF data in and around the gold lodes and resubmitting those samples for base metals analysis. We’ve now compiled a significant data set which underpins the exploration target expectations,” Managing Director, Andrew Paterson, said.
“The Exploration Target doesn’t include gold because there are two different populations of gold data within Mulga Bill. The high-grade cross-cutting veins contrast with bulk tonnage low-grade gold mineralization within the copper sulphide lodes, so we are treating both styles of mineralization.
“Once the gold, copper and silver data is compiled into a formal resource estimate we will be able to quantify the different styles of mineralization.”.
“This work demonstrates Mulga Bill has potential for a significant Cu-Au-Ag endowment in addition to the high-grade gold structures. This could be a significant value-add for an eventual production scenario.”
The Exploration Target range for copper is eight to 10Mt at between 0.2% and 0.4% Cu for 16,000t to 40,000t of contained metal.
Assays, geological logging and pXRF analyses of drilling completed at Mulga Bill to date have resulted in the interpretation of four subvertical north-south Cu-Au-Ag lodes, collectively referred to as the copper sulphide lodes, capped by a semi-horizontal supergene layer. This interpretation is supported by 1,543 multi-element assays selected from 90 holes within a strike length of approximately 380m. The Cu-Au-Ag lodes are proximal to the subvertical gold lodes and higher- grade shallow-dipping gold lodes modelled during the 518,000oz Au Mineral Resource Estimate.
Mulga Bill was identified as an intrusive-related gold system early in Great Boulder’s exploration at Side Well, highlighted by the pathfinder mineral assemblage of Au-Bi-Cu-Ag +/- Mo-Sb. The company is still working to refine this definition and gain a greater understanding of the mineral system responsible for the known gold endowments at Mulga Bill and Ironbark, as well as the other mineralized targets seen in surface geochemistry along the Ironbark trend.
Copper and silver has not been estimated within the MRE gold lodes, and future resource estimation will consider the various orientations of mineralization and domain the different mineralization styles appropriately.
For further information please visit: https://www.greatboulder.com.au/
