马脑壳金矿载金硫化物微量元素地球化学特征

Trace Elements Geochemical Characteristics of Gold-bearing Sulfides in Manaoke Gold Deposit

通过对马脑壳金矿主要载金硫化物黄铁矿、辉锑矿、雄黄的微量元素进行研究,发现不同矿物之间的稀土配分曲线差异很大,即使是同种矿物的稀土配分曲线也有明显的不同;Hf/Sm、Th/La、Nb/La、Y/Ho、Zr/Hf、Nb/Ta值的也有较大的差异性;黄铁矿样品的Co/Ni值按前人研究成果投图,其结果也显示出差异性。以上研究结果表明,马脑壳矿床的热液成矿期经历了不同性质的流体作用。此外,矿区内载金硫化物微量元素的Q型、R型聚类分析结果表明,部分成矿热液极有可能来自于矿区形成深部隐伏岩体的晚期岩浆热液。

The main gold-bearing sulfides of Manaoke gold deposit such as pyrite, stibnite, realgar trace elements are researched, according to the research results, the differences of rare earth distribution curve of different mineral are big, the difference of rare earth distribution curve of the same mineral are al- so different significantly. The values of Hf/Sm, Th/La, Nb/La, Y/Ho, Zr/Hf, Nb/Ta are not identical with each other. According to the predecessors＇research results to figure, the differences of Co/Ni values of py- rite samples are obviously. The above research results indicated that, the hydrothermal mineralization peri- od of Manaoke gold deposit has experienced the effects of different nature of the fluid. Besides that, Q cluster and R cluster analysis of the trace elements of gold-beating sulfides in mining area are conducted, the analysis results show that, part of the ore-forming hydrothermal maybe come from the late magmatic hydrothermal that form the deep concealed rock mass.