Keep up to date
Sign up to our
The Doolgunna mineral field in Western Australia’s Bryah Basin (150km north-east of Meekatharra) is one of the most exciting copper-gold provinces in the country. Sandfire and Ausgold are confident that the Doolgunna region represents an emerging VMS and mineral province.
The Doolgunna region has produced in excess of 2 million ounces of gold with the Peak Hill area contributing over 850,000 ounces. The majority of this production has been derived from Archean lode gold deposits however some production has been derived as a by-product from copper rich volcanic hosted massive sulphide (VMS) deposits. Other mineralisation which occurs in the region include shear zone-hosted copper, sedimentary-hosted lead, supergene-enriched manganese, banded iron formation (BIF) iron ore and talc in metasomatised dolomitic rocks.
Ausgold’s Doolgunna Project is located adjacent to Sandfire Resource's DeGrussa Copper Gold Project and is considered prospective for similar volcanogenic massive sulphide (VMS) copper-gold mineralisation. The project covers over 5 km strike length of prospective Jenkins Fault & Narracoota Volcanics. The prospective Narracoota Formation, a wide band of volcanic rocks, which runs broadly east-north-east for more than 100k is the host to Degrussa-style copper-gold mine and has the potential to host further discoveries.
The Monty massive sulphide discovery is 10km from Sandfire’s DeGrussa copper mine and approximately 23km from Ausgold’s Doolgunna Station tenement (E52/3031). The DeGrussa project itself lies 13km east of Ausgold’s tenement. The discovery holes at the Monty discovery include diamond drill holes TLDD0004 (16.5m grading 18.9% Cu and 2.1g/t Au, from 409.5m) and TLDD0005 (9.2m grading 11.8% Cu and 2.9g/t Au from 417m) and highlight the potential for discovery of high grade copper-gold sulphide mineralisation in favourable VMS stratigraphy throughout the entire Bryah Basin, and outside the immediate DeGrussa mine environment.
Previous exploration on the tenement has been limited to broad regional type studies including aeromagnetic interpretation and target definition, stream sediment sampling and reconnaissance soil sampling. In 2015, Ausgold commissioned Precision Geophysics Pty Ltd to carry out an independent review of geophysical surveys carried out at its 100% owned Doolgunna Station project in the Bryah Basin, WA.
Based on recommendations from the review, Ausgold is proposing follow-up work, including a high energy fixed loop (FLEM) geophysical survey of the south east corner of the Doolgunna Station tenement adjacent to Sandfire’s Noonyereena VMS Prospect. Modern FLEM geophysical technology has been successful in leading SFR into favourable stratigraphy which hosts the Monty discovery and Homer prospect and in identifying drill targets.
Limited exploration has been undertaken over the prospective Narracoota volcanics (being the host of the neighbouring DeGrussa deposit), which are largely under transported cover. The prospective geological structures associated with Alchemy Resources’ neighbouring Hermes gold mineralisation also extend into Ausgold’s Doolgunna project.