| | Book | South America, Africa, Indian sub-continent and China. A search of Amazon.com yields six books concerned...become economically viable. However, most economic Au and base metal deposits were formed by hydrothermal...Australia (which accounts for 65% of Australia’s current Au production), although the bulk of the production...at grades of 1.0–5.0 g/t Au. In many deposits, lateritic and saprolitic Au provides an easily exploitable...of heavy mineral sands that are rich in zircon, ilmenite and rutile (Hou and Warland 2005). The sediments |
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