山西高凡银金矿床黄铁矿的标型特征在预测深部矿体中的应用

APPLICATION OF TYPOMORPHIC CHARACTERISTICS OF PYRITES IN THE GAOFAN SILVER-GOLD DEPOSIT, SHANXI IN EXPLORING DEEP-SEATED OREBODIES

高凡银金矿床的黄铁矿在矿化空间上表现出:由上往下晶形{100}减少,{100)+{210}增多,X_(py),由高负值变为低负值;在单号勘探线一侧Cu、Co、Ni、K_p和爆裂温度趋于增高,As,Ag和a趋于降低;在双号勘探线一侧则显示相反的特征。分析表明,本矿床目前控制矿体仍属上部矿体,深部矿体主要位于单号勘探线一侧,且矿化较好,双号勘探线一侧深部主要显示边部矿化特征,矿化相对较弱。

In the mineralization space of the Gaofan silver-gold deposit the typomorphic characteristics of pyrites show a decrease in crystal form {100} from the top downwards but an increase in {100}+{210}. X_(Py) changes from high-negative value to low-negative value. On the side of odd-number exploration lines the abundances of Cu, Co, Ni, K_P and precipitation temperature of pyrites tend to increase; on the side of even-number exploration lines an opposite trend is observed. The studies indicate that the engineering-control orebodies of the Gaofan silver-gold deposit now belong to the upper orebodies, the major deepseated orebodies are located on the side of odd-number exploration lines and their mineralization is well developed; the deep-seated orebodies on the side of even number exploration lines are characteristic of marginal mineralization, so their mineralization is relatively weak.