广东新榕锰矿伴生银的赋存状态初步研究

A Preliminary Study on Mode of Occurrence of Associated Silver in the Xinrong Manganese Deposit, Guangdong Province

广东省西部新榕锰矿矿石中含银较高 ,平均达到 10 0× 10 - 6以上。利用电子探针等测试方法对锰矿石中伴生银的赋存状态进行研究 ,初步查明银主要是以脆银矿、溴角银矿、银锑黝铜矿、银金矿等矿物形式存在 ,呈微小颗粒状被包裹于铁锰矿物内或矿物间隙里。

The silver content of ores from the Xinrong manganese deposit in western Guangdong is higher than 100×10 -6 on average. According to the electron probe analyses and other data, some conclusions have been reached as follows: The modes of occurrence of associated silver include minerals of stephanite, bromargyrite, Ag_Sb_tetrahedrite,electrum etc., which occur as small grains among or between Fe_Mn minerals. Slight amounts of silver exist in Fe_Mn minerals as adsorbed ions.