评价含锡花岗岩类岩体成矿性的包裹体地球化学标志

A INCLUSION GEOCHEMISTRY OF TIN-BEARING GRANITOID BODIES AND ITS EXPLORATION IMPLICATIONS

本工作比较系统地研究了湘桂粤赣地区主要含锡花岗岩类岩体和部分非含锡岩体矿物中包裹体的发育分布特征和大小、形状、类型、气相比、均一温度、盐度、气液相成分、氢氧同位素组成等特征,指出含有机质包裹体、沸腾包裹体群、含流体相熔融包裹体,CO_2含量大于4%,Cl^-/F^-摩尔比值小于1以及流体总浓度大于10%等特征是成锡岩体的包裹体地球化学判别标志。

The characteristics of inclusions, including microscopic characteristics, homogenization temperature, salinity, composition, δ^(18)O_w and δD_w, in minerals of major tin-bearing and some tin-barren granitoid bodies in Hunan, Guangxi, Guangdong and Jiangxi provinces are systematically described. It is pointed out that organic-bearing inclusions, boiling inclusions, fluid-bearing melt inclusions, CO_2 content>4%, Cl^-/F^- mole ratio<1, total concentration of inclusion fluids>10%, etc. are the accessment criteria of the inclusion geochemistry of tin-mineralized granitoid bodies.