广西大厂锡多金属矿床中铟的富集规律

详细论述大厂锡多金属矿床中地层和矿石的微量元素和主要金属元素与铟的关系,岩浆岩、近矿围岩和矿石的稀土元素特征与铟的关系以及铟与成矿温度之间的关系。微量元素分析结果表明:在赋矿地层中铟的含量较高,且不同岩性之间的铟含量变化较大,而在矿石中铟与锡和镉均呈正相关关系,与锌呈负相关关系。稀土元素分析结果表明,在岩浆岩中铟含量与δEu成负相关,在近矿围岩中铟含量与δEu呈正相关,在矿石中铟含量与δEu、LREE/HREE、(La/Yb)N关系密切,而且铟在相对氧化、弱碱性的高温阶段更易于富集。最后对大厂锡多金属矿床中铟富集的有利部位进行了预测。

Indium distribution in Dachang tin-polymetallic deposit of Guangxi Province

The preliminarily research focused on dispersed elements in Dachang tin-polymetallic deposits of Guangxi province.The relationships among indium,trace elements and main metal elements of wall rock and ore were introduced,as well as the relationships among indium content and distribution,and the typical characteristics of rare earth elements of igneous,wall rock and ore.The trace element analyses results suggest that indium enriches in the wall rock and varies in different lithologies,and indium is prositively correlated to Sn and Cd,and negatively correlated to Zn.The rare earth element analyses results suggest that indium content is negatively correlated to δEu in igneous rocks and positively correlated to δEu in wall rocks.The indium contents are intimately associated with δEu,LREE/HREE,(La/Yb)N in ores.The relative oxidized,weakly alkali and high temperature stage is favorable for enrichment of indium during the ore-forming process.At the end,the enrichment prospect of indium was given here.