摘要
产铀岩体气液包裹体数量多,热液纯净,密度低(0.83g/m^3),盐度低(1.24％wt NaCl),以Ca^(2+)、Mg^(2+)、HCO_3^(1-)为主,pH=7.07—8.31,铀浓度达0.0017—0.0066mol。
Gas-liquid inclusions in the Shuguang U-bearing submass have the following features:1. Gas-aqueous inclusions are obviously more in U-bearing masses than in U-barren masses.2. Primary gas-liquid inclusions were formed at 250-350℃, indicating that high-tempe-rature pneumatohydrothermal solutions are pure with low density (0.73g/cm3) and low salinity (1.5-1.6wt.%NaCl).3. Secondary gas-liquid inclusions were formed at 120-350℃, demonstrating that U-bearing masses were derived from hydrothermal solutions higher in purity, and lower in density (0.83g/cm2) and salinity (1.24 wt.% NaCl).4. The solutions contain mainly Ca+2, Mg2+, HCO_(3)^(1-) with pH = 7.07-8.31 (at 200?) and higher uranium concentrations (0.0017-0.0066 mol).
出处
《地球化学》
CAS
CSCD
北大核心
1989年第3期260-264,共5页
Geochimica
