A Study on the Occurring States of Ag in the Oxidized Ores in China

A systematic study on the occurrences and association states of silver in the oxid ores in China has been carried out in this paper.It is indicated that silver is mainly existed as independent silver minerals in oxide ores.Only little part of silver occurred occasionally as ion absorption or substitution in other minerals.The silver mineral assemblages and mineralization series,and shapes,textures,grain size,distribution features of the silver minerals are closely related to the nature of ore-forming fluids and the oxidation degrees of the primary ores.The Pb,Zn,Fe oxides and residual sulfides are the main carrier minerals of silver.The partitioning of silver in ores is controlled by the oxidation intensity of ores,silver mineral associations and distribution features in ores.This will be helpful for improving the silver recovery from the ores.