【摘要】 采用MLA联用技术对一批进口金矿砂样品的物相组成、化学成分和微观形貌进行分析，并结合金矿、黄钾铁矾渣与酸性矿山废水的次生矿物特征来判定金矿砂的属性。结果表明：样品表面有孔洞，呈现蜂窝构造，黄钾铁矾的微观形貌呈土状和胶状；金含量为2.57g/t,pH值为3.71，酸性特征显著；样品的主要物相为FeS₂、SiO₂、KFe₃（SO₄）₂（OH）₆、K_0.5-1（Al,Fe,Mg）₂（SiAl）₄O₁₀（OH）₂·nH₂O、BaSO₄、CaSO₄等。黄钾铁矾含量为7.43%，其中Zn、Cu、As含量远低于湿法炼锌产生的黄钾铁矾渣中的含量，且样品中不含铁酸锌、硅酸锌物相成分。综合分析样品的外观、微观形貌、物相组成和化学成分发现样品具有天然矿物特征，推断样品可能为蚀变岩型金矿或由火山喷流沉积和后期矽卡岩化改造的复合型金矿床蚀变矿物。更多还原

【Abstract】 The phase composition,chemical composition and micro-morphology of one block of imported gold ores are analyzed by using MLA combined technology.Combined with the characteristic analysis of gold ores and jarosite residue,secondary mineral formed in acid mine drainage,the attribute identification of gold ores is realized.The results show that the surface of sample have holes,the micro morphology of jarosite in the sample is earthy and colloidal state,the gold content in the sample is 2.57g·t^-1,the p H value is 3.71,and the acid characteristic is remarkable.The main phase of samle are FeS₂,SiO₂,KFe₃（SO₄）₂（OH）₆,K_0.5-1（Al,Fe,Mg）₂（SiAl）₄O₁₀（OH）₂·n H₂O,Ba SO₄,CaSO₄,eta l.The jarosite content in the sample is 7.43%,and the content of Zn,Cu and As far lower than the content of its in jarosite residue produced in zinc hydrometallurgy,and it doesn’t contain the phase composition of zinc ferrite and zinc silicate in the sample.Comprehensive analysis of the apperarance,microscopic morphology,phase composition,chemical composition of the sample,the sample conforms to natural mineral characteristics,inferred that the sample is probably structural altered rocks-host gold deposit or altered minerals of composite gold deposits transformed latterly by volcanic exhalative sedimentation.更多还原