Krakatoa Resources Limited (ASX: KTA) has confirmed that survey data results from its heliborne VTEM Max survey recently completed over parts of the Mt Clere project located at the north western margins of the Yilgarn Graton, WA, has clearly outlined multiple extensive highly conductive targets.
The company’s Geophysical Consultant, David McInnes, says the targets have the potential to host significant massive sulphide mineralisation.
“It is a privilege to be able to assist Krakatoa Resources with the interpretation of this data. The survey has discovered multiple isolated late-time conductors that form discrete shapes, situated next to large scale magnetic lineaments. The data records some of the best EM responses representing potential basement conductors I have seen in my 30 years of AEM data review.”
Krakatoa’s CEO, Mark Major, said the results are a major achievement for the company.
“It took close to 10 months to get the VTEMTM Max system to the project and the wait has been well worth it. We now have world class late time conductive targets at key structural intersection, close to the craton margins. All the hallmarks for company defining discoveries.
“We look forward to proving up the priority targets with ground exploration activities followed by drilling as soon possible.”
In November 2021 UTS Geophysics, on behalf of Krakatoa Resources, collected 1,966 line kilometres of versatile time domain electromagnetic (VTEMTM Max) and total magnetic field data over the Mt Clere Project. The VTEM system is sensitive to changes in the subsurface conductivity.
Airborne EM surveys have been shown to be successful in locating geophysical anomalies associated with sulphide mineralised zones. Chalice Mining Limited’s recent Ni-Cu-PGE Julimar discovery was in the similarly aged Southwest Terrane of the Yilgarn Craton and was initially identified as a strong electromagnetic feature. The Narryer terrane, which forms the northwest margin of the Yilgarn Craton is an underexplored region which similarly consists of relatively high-grade granitic gneisses interlayered with metasedimentary rocks that are intruded by granites and pegmatites.
Geophysical consultant, Montana GIS (David McInnes) has completed a comprehensive interpretation of the Versatile Time-domain Electro-Magnetic (VTEM) surveys flown over the part of the Mt Clere tenement area.
The data revealed a total of 52 VTEM conductive targets which were ranked according to various characteristics.
Of these fifty-two targets twenty high-priority targets were defined as late time, with strong amplitude (late time Taus), appropriate late time cross over in the X component, highly coherent “z” component single and twin peak anomalies, pertinent wavelengths, strike limited and close to know or interpretated lineaments.
Sixteen medium-priority targets were defined as mid to late time anomalies generally without a magnetic anomaly association.
These sections represent various targets within the cluster areas across the survey field. Each plot displays “X’ and “Z” component observed data time decay profiles, total magnetic field and derivative profiles (Reduced To Pole) with resistivity depth transform images.