pre-activationPre-activation of zinc sulphide in the ore by copper metal ions due to the presence of secondary copper sulphides coupled with water exposure leading to acid generation and the production of soluble copper metal ions will persist in the Bisha orebody until 2020 and perhaps beyond depending on the degree of contamination within the Primary orebody itself. To date drill results suggest the problem persists at depth.
Get used to it, Bisha is not a copper/zinc concentrates producer, Bisha is a bulk concentrate zinc producer with other payables in product. The good news is there is lots of it and the grades are marketable zinc, an excellent selling point that Nevsun should leverage to divest of an asset that as cash could rapidly promote growth and development in Serbia.