Geological modelling of
ISCR would utilise a series of injection and recovery wells to pump a weak acid solution to dissolve the copper within the ore body. The method relies on naturally developed fractures to focus the solution into the orebody where the copper is leached, after which the copper-rich solution is pumped to surface through recovery wells for processing into copper cathode sheets using an electro-chemical process that separates the copper from the solution. During the Quarter, a detailed hydrogeological review was completed demonstrating that the target represents a strong candidate for ISCR. In addition, further metallurgical testwork was undertaken on high and low grade composite samples using combinations of ferric sulphate and chloride added to the leach system. Results demonstrated copper recoveries of 77.4% and 71.9% for high and low grade samples respectively in addition to recovery of the silver credits.
Flying of the 8,788km Airborne Gravity Gradient (AGG) survey, undertaken collaboratively with Sandfire, has now been completed with data products expected in the next month. AGG results are expected to provide valuable information on the location of sub-basins, margins and controlling structures where copper-silver mineralisation may be focussed. Results will cover the Kitlanya East (KITE), NCP and KITW projects where they will be used to further prioritise targets for follow-on drill testing.
During the Quarter, the Company progressed a programme aimed at assessing the Mt Alfred area for signs of mineralisation and implementing an auger programme to test an area of conductance south-west of the Monti Prospect.
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