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Havilah Resources’ airborne EM survey identifies strong conductors, potentially indicating massive sulphides

Proactive Investors Monday, 12 August 2019
Havilah Resources Ltd (ASX:HAV) has identified a series of 16 conductors at its tenements in the Mutooroo Copper-Cobalt district 60 kilometres west of Broken Hill in South Australia. Using an airborne electromagnetic (AEM) survey, Havilah targeted massive sulphide mineralisation and identified several priority anomalies for follow-up with ground-based EM. This includes three anomalies with very strong and clear anomalism near the Mutooroo and Scorpion main sulphide mineralisation. Filling critical information gap Havilah chief executive officer Walter Richards said the VTEM survey was filling a critical information gap in the area within 10 kilometres of the Mutooroo resource. Richards continued: “It was the logical next step in investigation the massive sulphide potential of the Mutooroo Copper-Cobalt district. “The definition of additional copper-cobalt sulphide resources in the area is an important step in advancing the strategy of a longer mine life with higher throughput for the … district with the Mutooroo deposit as the foundation.” Ground-based surveys planned A particularly strong conductor MUVA2 has been identified at the Scorpion prospect which diverges from the observed Scorpion lode trend and may indicate a plunging sulphide shoot geometry. Some of the five drill holes intersected intervals of massive sulphides but do not appear to have tested the main AEM conductor. Fixed-loop ground EM surveying is planned to create 3D modelling of the bedrock conductor, define potential offset and plunge extensions and to assist with refined drill targeting and testing. Interpreted bedrock conductors The survey aimed to explore for additional copper-cobalt resources around Havilah’s priority targets and delineated several interpreted bedrock conductors which can potentially represent massive sulphide bodies. Utilising the VTEM Max time domain EM system, it was flown by UTS Geophysics and final data was reviewed, analysed and interpreted by consultant geophysicist Russell Mortimer of Southern Geoscience Consultants. Identifying source of large surface anomalies Additional exploration to be undertaken on priority anomalies may include ground-based induced polarisation geophysical surveys, which are better suited for the detection of disseminated sulphide mineralisation. Ground surveys are also more conducive to shallow drill testing to find the source of large surface anomalies, as evidenced by the lack of AEM conductor responses related to the known disseminated copper mineralisation at Havilah’s King Brown and Trinity prospects.
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