广西新民铜银多金属矿床金银的赋存状态

新民铜银多金属矿床的矿体呈脉状、透镜状和似层状产出，主要受断裂、接触带和隐爆角砾岩筒构造控制。金、银主要呈自然金、自然银、辉银矿（β－Ａｇ２Ｓ）－螺状硫银矿（α－Ａｇ２Ｓ）、硫铋铅银矿、角银矿和碘银矿等独立矿物存在．金的主要载体矿物为毒砂、褐铁矿、辉铋矿、方铅矿、黄铁矿和黄铜矿。配分计算结果表明：在原生矿石中，黄铁矿中金的配分率较高；而方铅矿、黄铁矿和黄铜矿中银的配分率较高．在氧化矿石中，褐铁矿中金、银的占有率均较高．根据金、银的赋存状态特征，对该区金、银的综合利用进行了初步评价．

THE OCCURRENCE OF GOLD AND SILVER OF XINMIN COPPER AND SILVER POLYMETALLIC DEPOSIT, GUANGXI

The ore bodies of Xinmin copper and silver polymetallic deposit are existed in the form of vein and lens and are controlled by faults, contact zones and cryptoexplosive breccia pipes. Gold and silver occur mostly in the form of independent minerals as native gold, native silver, argentite-acanthite, ourayite, chlorargyrite and iodargyrite. The main gold carrier minerals are arsenopyrite, limonite, bismuthinite and pyrite. The main silver carrier minerals are bismuthinite, galena, limonite and chalcopyrite. The distribution pattern characteristics show that within primary ores gold mainly exists in pyrite, whereas silver in galena, pyrite and chalcopyrite. But in oxidized ores, gold and silver mainly exist in limonite. In the light of their occurrence mode, a preliminary evaluation for the comprehensive utilization of gold and silver associated with the ore deposit is made.