内蒙古翁牛特旗长汉卜罗铅锌矿伴生银赋存状态研究  

Occurrence of associated silver in Changhanboluo Pb-Zn deposit in Wengniuteqi of Inner Mongolia

作　　者：蒋炜[1] 林龙军[1] 张云国 李占龙[1] 潘彦好 

机构地区：[1]有色金属矿产地质调查中心,北京100012 [2]中色地科矿产勘查股份有限公司,北京100012

出　　处：《矿产与地质》2015年第4期462-469,共8页Mineral Resources and Geology

摘　　要：内蒙古翁牛特旗长汉卜罗铅锌矿位于新开地―乌丹近EW向大断裂的南侧,是一个叠加于前中生代褶皱基底之上的复合构造单元。本区矿石中银矿物和含银矿物种类较多,已发现8种,含银最高的为辉银矿,含银比较普遍的以黝铜矿族矿物为主。在黝铜矿矿物晶粒中,Ag的含量不均匀,呈带状和不规则状分布。选矿工艺中应特别重视黝铜矿系列矿物的回收。矿石中黄铜矿是银矿物与含银矿物的最主要载体矿物,占统计总数的34.48%,有效回收黄铜矿,是提高银回收率的关键。以黝铜矿族为例,含银与否或银含量多寡,与矿物中Sb关系密切。大量数据证明,黝铜矿中较高的As、Zn不利于Ag的富集,而Sb与Ag有更为密切的成生关系。Changhanboluo Pb-Zn deposit in Wengniuteqi of Inner Mongolia is located on the south side of Xin- kaidi-Wudan nearly EW-trending major fault. The deposit is a composite structural unit which superimposes on the pre-Mesozoic folded basement. In this area, various kinds of silver and silver-bearing minerals exist. Among the discovered 8 kinds of minerals, argentite is the one with highest silver content, while tetrahe- drite-group minerals are the most common silver-bearing minerals. However, the uneven distribution of Ag in the grains of tetrahedrite is characterized by banding or irregularity. Therefore, the author believes that the recovery of tetrahedrite-group minerals requires much attention in the ore-dressing process. Moreover, chalcopyrite is the most primary carrier mineral of silver and silver-bearing minerals, and statistically speak- ing it accounts for 34.48% of the total carrier minerals. Thus the effective recovery of chalcopyrite is the key to improve the recovery rate of Ag. This paper used tetrahedrite group as an example to demonstrate the close relationship between existence or quantity of Ag content and Sb in the minerals. Large amount of data indicates that high As and Zn in tetrahedrite prevent the formation of Ag, and there is a close genetic relation between Sb and Ag.

关 键 词：矿石特征 银赋存状态 辉银矿 黝铜矿 翁牛特旗 内蒙古 

分 类 号：P618.4[天文地球—矿床学] P618.52[天文地球—地质学]