Underground at the bonanza vein, low sulphidation, Hishikari mine.
Left: The right hand banded half of the vein averages over 400 g/t Au. The massive left hand half and the enclosing country rocks are barren except where the latter contains banded veinlets.
Below: Members of the tour group with Sumitomo mine geologist Mr Margusa (right).
Photographs by Mike Porter