分散元素成矿机制研究获重大进展

Ore-forming Mechanism of the Dispersed Elements

        涂光炽(中国科学院地球化学研究所 贵阳550002)
        高振敏(中国科学院地球化学研究所 贵阳550002)

         分散元素;独立矿床;矿床分类;赋存状态;成矿专属性

        dispersed elements;independent ore deposits;classification for ore deposits;Existing forms of the dispersed elements;ore-forming specialty

        分散元素一般指在地壳中丰度很低(多为ppb级),且在岩石中极为分散为特征的元素。经深入研究某些分散元素在特殊地质环境下能常富集形成独立矿床,厘定了分散元素独立矿床的含义,对分散元素矿床进行了分类,总结出分散元素矿床中它们以独立矿物、类质同象、吸附三种形式存在。分析了我国西南地区它们集中出现的有利因素,阐明了分散元素成矿专属性。

        The dispersed elements are normally referred to those elements of low abundance (usually at ppb level) in the crust,with the characteristics of extreme dispersion in various rocks. They include Ge, Ga, In, Tl, Re, Cd, Se and Te eight elements. This research has systematically studied that some of the dispersed elements can be extraordinarily concentrated to form independent ore deposits under favorable geological conditions, stipulated the meaning of independent ore deposits of the dispersed elements, made classification for ore deposits of the dispersed elements, summarized the dispersed elements presented in their ore deposits as three forms of independent minerals, isomorphism and adsorption, studied the favorable factors for their mineralizations concentrated in the southwestern China, and delineated the ore-forming specialty of the dispersed elements.