A scoping study into the Prieska zinc/copper project, in South Africa, has estimated that the project could produce between 70 000 t/y and 80 000 t/y of zinc and some 22 000 t/y of copper.
ASX-listed Orion Mining told shareholders that the 2.4-million tonne a year Phase 1 project was expected to require a capital investment of some A$300-million to A$330-million at peak, delivering a pre-tax net present value of between A$400-million and A$440-million, and a pre-tax internal rate of return of 38%.