ASX-listed company Revolver Resources (ASX:RRR) reports it has found ‘encouraging’ results that reveal the copper potential of the Dianne Copper Project in north Queensland.
The company says results from new drilling and soil sampling indicate the presence of clear surface anomalies overlapping the identified electromagnetic (EM) drill targets all in close proximity to the existing Dianne deposit.
Hole 22DMDD18 and 22DMDDD19 were drilled over 1,141m aiming for an EM target 200m beneath the ‘high-grade’ massive sulphide Dianne Deposit, and Revolver says both holes intersected interpreted extensions of the massive sulphide horizon present at the project.
Revolver Resources Managing Director Pat Williams says: “Initial drilling of the Dianne Deeps target is giving the first step-out look at the stratigraphy and clear evidence of the right volcanic massive sulphides (VMS) deposit environments beyond the Dianne deposit itself.
“We are seeing encouraging geological sequences and evidence of proximal massive sulphide occurrences distinct from that at the Dianne deposit, giving confidence to known clustering effects with VMS deposits”
We are seeing encouraging geological sequences and evidence of proximal massive sulphide occurrences distinct from that at the Dianne deposit, giving confidence to known clustering effects with VMS deposits.
Importantly, we have identified the Dianne High Strain zone which identifies over 20 EM drill targets conducive to VMS hosted deposits and have secured a second diamond rig to accelerate the preliminary drill testing program of these targets and we look forward to unlocking the true potential of the region.”
Revolver reports the ‘high-priority’ Dianne Deeps target is based on the identification of a shallow EM conductor located within 200m of the existing Dianne VMS mineralisation that has a response supporting the potential to reflect massive sulphide mineralisation. The target is positioned below, or on a south-plunge from Dianne within the same broader prospective stratigraphic and structural setting.
The company says hole 22DMDD18 and 22DMDDD19 both intersected interpreted extensions of the massive sulphide horizon present at Dianne, and this is represented as brecciated and recrystallised chert with minor pyrite mineralisation within a broader sequence of shales interbedded with sandstone and contemporaneous volcanics confirming an extension of the prospective geology.
Stratigraphically below this horizon, 22DMDDD19 intersected sedimentary breccias and debris flows with mineralised intraformational clasts of massive sulphide (pyrite-chalcopyrite-sphalerite), suggesting the potential presence of proximal VMS horizon pre-Dianne massive sulphide lens.
Hole 22DMDDD19 was also surveyed with downhole EM (DHEM).
Revolver states the conductive response identified in the various surface and airborne geophysical surveys have yet to be explained by the drilling to date. DHEM plate modelling from hole 22DMDDD19 is preliminary, however it has identified several subtle off-hole conductors.
This ‘high-priority’ target remains untested with a view to repositioning the next exploration hole in close proximity, and a second DHEM survey is planned for 22DMDD18 in an attempt to further refine the off-hole conductive responses.
Of additional interest, hole 22DMDDD19 intersected a number of metre-scale zones of ‘well-developed’ quartz-carbonate veined stockwork and breccia. The company reports these zones display a varying presence of disseminated sulphide (galena-pyrite-sphalerite-arsenopyrite) that is interpreted to be of orogenic gold vein-style origin.
Samples from these zones have been submitted for assay to test the gold bearing potential.
While the geology logged from the company’s drillholes is ‘encouraging’, it has not yet been assessed quantitatively or interpreted as to grade or true width of mineralisation.
Revolver reports this current program of work commenced in August 2022 with the acquisition of 670-line km of Heli-EM data that identified multiple anomalies, which were small to moderate sized, discrete and localised late-time bedrock conductors situated across numerous areas within the tenement.
Following the positive exploration results of the Heli-EM survey, the company deployed on-ground geological teams to acquire a large volume of new field information and knowledge, ground-truthing a number of the identified EM targets. It also notes several programs of geological mapping, rock chip and soil sampling were all routinely undertaken to contribute to the ranking and prioritisation of so many drill worthy targets.
The modelling of newly collected data, and a weights of evidence approach to targeting has now vectored Revolver onto several ‘high-priority’ targets for immediate drilling. Targeted drillhole design has been refined based on additional detailed conductivity section modelling and conductor plate modelling of the EM decay data using Maxwell EM modelling software by Geo Discovery Group. These targets are now in the process of being drill tested.
Based on all these factors and encouraging results from initial exploration, the company has secured and deployed a second diamond drill rig to site to scale-up exploration activities.
Revolver Resources is an Australian public company focused on the development of natural resources, focusing on copper exploration. The company has 2 wholly owned copper projects which consists of the Dianne and Osprey Project.
Images: Revolver Resources Holdings Ltd
