摘要
系统研究了矿床中石英的产状、成因类型及标型特征,结果表明:与成矿作用密切相关的千里山花岗岩体是地壳硅铝层物质经重熔生成的岩浆冷凝后形成的;成矿流体为花岗岩浆分异演化的产物;成矿作用主要发生在气成一高温热液阶段;含矿溶液是一种中等盐度和密度、含有较多CO_2、F和CI等挥发组分的弱酸性气液;在主要成矿阶段,体系处于一种半封闭状态.外压降低引起成矿流体沸腾和少量深循环大气降水的渗入是导致成矿的两个重要因素.成矿阶段生成的石英中成矿元素的种类和含量大体反映了矿床的地球化学类型.因此,石英中的微量金属元素是矿化的灵敏指示剂.
This paper systematically deals with the attitude, genetic type and typomorphic peculiarities of the quartz. The results shown that the Qianlishan granite which closely related to mineralization was the product of magma condensation from the remelting materials of crustal silica-alumina layer and metallogenic fluid came from the materials of the granite magma fractionation evolution; the mineralization mainly occurred in the pneumatogenic-high temperature hydrothermal fluid stages, the mineral-bearing liquor was a kind of medium salinity and density of weak acidic pneumatolitic solution with a little more fugitive constituent of CO2, F and Cl. The mineralization system was a semi-closed state in the main metallogenic stage. It is obvious that the decrease of outside pressure and a few deep-cycled meteoric water infiltration were two major important factors for mineralization. The kind and high content of main mineralization elements in quartz formed in metallogenesis simply indicate the geochemistry type of the ore-deposit. Therefore, the trace metal elements in quartz could be regarded as a sensitive indicator of mineralization.
出处
《华南地质与矿产》
CAS
1997年第3期60-69,共10页
Geology and Mineral Resources of South China
关键词
石英
标型特征
矿床成因
石英矿床
矿物学
quartz typomorphic peculiarities genesis of ore-deposit Shizhuyuan southern Hunan.
