This work describes preliminary laboratory testwork to study the relative
leaching response to cyanidation and thiourea leaching of an oxidised low
grade gold ore. The potential of an alternative lixiviant like thiourea to
commercial processing of mine dumps is discussed by specific reference
to selected case histories. It would appear that on the basis of the
available published information, there could well be a case advanced for
the acid thiourea leaching of sulphide concentrate tailings being subjected