The possibilities for bacterial leaching of refractory gold ores found in the
Central Victorian region of Australia are examined. The behaviour of
bacteria, especially 77iobacillus ferroaridans is outlined and the effects
of these when they are exposed to pyrite, arsenopyrite and stibnite are
examined. The factors which are particular to Central Victoria are
outlined and the possibility of adapting a bacterial culture to suit the
conditions is discussed. It is concluded that a bacterial leaching system is
a feasible proposition and that it could enhance leaching rates and yields.