CHANDA15 May 2017 15:39
To surmise the technical aspects of Mowana: the previous operator failed to manage the resource effectively, partly due to the firm they hired to assess the resource. The major issue, as far as I can discern, is the previous operator's failure to properly domain the various ore types thus inappropriate processing methods were used. As a result, recovery rates were adversely impacted. The geological model is being improved and ALO are undertaking further drilling to this vain in order to overcome this issue. Secondly, it is of the opinion of WAI that the resource does not currently conform to the internationally recognised standard 'JORC'. Again, pit optimisation and further drilling is planned and are probably underway now. It is expected that the Mineral Resource base will be reduced; the extent to which is unknown. However, only breccia mineralisation currently compile the resource base, omitting carbonate mineralisation. Providing that the DMS plant is a feasible option, carbonate mineralisation can be processed. As such, the mineral resource base will be inclusive of carbonate mineralisation, hence a significant in resource will follow. To conclude: (1) ALO are attempting to improve the poor geological model constructed by the previous operator. This will allow ALO to utilise an appropriate processing method for the various ore types; (2) ALO are attempting to find a method to process the ore without excessive copper loss, or use of uneconomical amounts of acid for leaching. If a successful method of treating is found, the DMS plant will be a feasible option. And a significant increase in NPV is expected.