陕西红花坪铅锌矿中伴生银、镉、镓的赋存状态研究

摘要

Honghuaping lead-zinc deposit is located in the Au-Cu,Pb-Zn and Hg-Sb polymetallic metallogenic belt in Xunyang basin,southern Qinling Mountain.It is a sedimentary-reformed lead-zinc deposit.The grades of Ag,Cd and Ga in the deposit are all over the least industrial grade as the associated useful composition.The occurrences of Ag,Cd and Ga in Xunyang lead-zinc deposit were studied with the help of ore microscope and electronic probe.It shows that the main mineral compositions of the ore are zinc blende and galena,and also have bits of pyrite,bonamite and rhodochrosite.The useful composition of Silver minerals in the mine mostly occurs as electrum,and some occurs in galenite with isomorphism forms.The independent minerals about Cd and Ga are not appeared,which occur in the crystal lattice of zinc blende and galena.Then the Carrier minerals characteristics of useful associated elements are expounded.Most useful associated elements have broad prospects,which can be comprehensively utilized in lead-zinc deposit.The occurrence study of useful associated elements can bring high economic value and have some guidance significances to utilizing the mineral resource reasonably.%　　红花坪铅锌矿位于南秦岭旬阳盆地的金铜、铅锌、汞锑等多金属成矿带内，其中伴生的银、镉、镓含量均超过其作为伴生有用组分的最低工业品位。通过显微镜下鉴定并结合电子探针分析等手段对伴生有用组分的赋存状态进行详细的研究。结果表明，矿石中主要矿石矿物为闪锌矿、方铅矿，其次为少量黄铁矿、菱锌矿和菱锌锰矿等。矿石中伴生银主要以独立矿物银金矿的形式存在，其次以类质同象形式赋存于方铅矿中。而镉、镓未形成独立矿物，主要呈类质同象赋存于闪锌矿和方铅矿的矿物晶格中。铅锌矿中大量伴生组分可供回收利用，具备良好的综合利用前景。