长坑矿床矿化过程中元素的质量迁移及金银关系

在长坑矿床的金矿化和银矿化过程中，质量迁移计算显示ＳｉＯ２，Ａｌ２Ｏ３，ＦｅＯ，Ｎｉ，Ｚｎ，Ａｓ，Ｂａ均为带入组分，而ＣａＯ，ＭｇＯ，Ｎａ２Ｏ，Ｓｃ，Ｖ，Ｃｏ，Ｂｉ，Ｓｒ，ＲＥＥ则为带出物质：Ｆｅ２Ｏ３，ＭｎＯ，Ｃｕ，Ｐｂ的得失性质因矿化类型而异，轻，重稀土在金矿化中发生分离，但在银矿石形成过程中却表现出比较一致的行为。

MASS TRANSFER IN MINERALIZING PROCESS AND Au-Ag RELATION IN THE CHANGKENG DEPOSIT

alculation of mass transfer with equation presented by grant (1986) shows that SiO2,Al2O3, FeO, Ni, Zn, As and Ba are gained components, while CaO, MgO, Na2O, Sc, V, Co,Bi, Sr and REE are lost components for both gold and silver mineralizations in the Changkeng deposit. The gains or losses of Fe2O3, MnO, Cu and Pb depend on the type of mineralization.Separation of HREE from LREE occurs in mineralizing process of gold, but rare-earth elements show similar behavior during formation of silver ore. The relations of metallogenic separation and co-enrichment between gold and silver suggest the mineralizations of gold and silver represent re-sults of unified hydrothermal process in different stages. Silicification of country rock and anoma-lies of As, Pb and Zn should be useful prospecting indicators.