中文摘要：

以合成花岗岩、水、不同浓度的盐酸溶液、氢氟酸溶液作为反应初始物,在850℃,100 MPa,接近于NNO的条件下开展了金在不同花岗质熔体中溶解度的实验研究,实验固液相产物中的金含量使用石墨炉原子吸收法测定。实验结果显示,金在花岗质熔体中的溶解度变化范围为1.87～156.62μg/g,流体相中金的溶解度为0.31～6.92μg/g;金在熔体相中的溶解度较其在共存液相中的高。花岗质熔体相中金的溶解度明显受熔体化学组成的影响,过碱性富钠花岗质熔体中金的溶解度明显高些;金在花岗质熔体中的溶解度随着熔体中Na2O/K2O摩尔比增大而增大;在氟氯共存岩浆体系中,氟含量变化对金在熔体相中的溶解度影响不明显,而液相中氯含量增大有利于提高金在流体相中的含量。

英文摘要：

Haplogranitie gels and distilled water, hydrochloric acid solutions and hydrofluoric acid solution were em- ployed as starting solid materials and fluid in this experimental study. The temperature and pressure were 850℃, 100 MPa, respectively, and the fugacity was near NNO. Gold content in silicate melt and aqueous fluid were meas- ured with a flame atomic-absorption spectrometer （AAS）. Results show that the solubility of gold in different melts is ranged from 1.87× 10^-6 to 156. 62 × 10^-6 and gold contents in aqueous fluid are vary from 0. 31 × 10^-6 to 6. 92 × 10^-6. Gold content in silicate melt phase is higher than that in the coexisting aqueous fluid. Solubility of gold is affected by composition of the melt, and gold solubility in Na-rieh peralkaline silicate mell,s is obviously higher and increases with increasing Na20/K20 mole ratio. Fluorine has no obviously influence on gold solubility in melt phase, but increasing chlorine content can improve gold concentration in aqueous fluid phase, in fluorine and chlorine coexisting magma system.