| 金在花岗质熔体中溶解度的初步实验研究 |
| |
| 引用本文： | 胡晓燕,毕献武,蔡国盛,陈佑纬,董少花.金在花岗质熔体中溶解度的初步实验研究[J].矿物学报,2012(1):22-27. |
| |
| 作者姓名： | 胡晓燕 毕献武 蔡国盛 陈佑纬 董少花 |
| |
| 作者单位： | 中国科学院地球化学研究所矿床地球化学国家重点实验室;贵州省有色金属和核工业地质勘查局;中国科学院研究生院 |
| |
| 基金项目： | 国家自然科学基金(批准号:41103030;41130423);贵州省科学技术基金(黔科合J字[2010]2232号) |
| |
| 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。
|
| 关 键 词： | 金 花岗质熔体 溶解度 实验研究 |
A Preliminary Experimental Study on the Solubility of Gold in Granitic Silicate Melts |
| |
| HU Xiao-yan,BI Xian-wu,CAI Guosheng,CHEN You-wei,DONG Shao-hua.A Preliminary Experimental Study on the Solubility of Gold in Granitic Silicate Melts[J].Acta Mineralogica Sinica,2012(1):22-27. |
| |
| Authors: | HU Xiao-yan BI Xian-wu CAI Guosheng CHEN You-wei DONG Shao-hua |
| |
| Institution: | 1,3(1.State Key Laboratory of Ore Deposit Geochemistry,Institute of Geochemistry,CAS,Guiyang 550002,China; 2.Guizhou Bureau of Nonferrous Metal and Nuclear Industry Geological Exploration,Guiyang 550002,China; 3.Graduate University of the Chinese Academy of Sciences,CAS,Beijing 100049,China) |
| |
| Abstract: | Haplogranitic gels and distilled water,hydrochloric acid solutions and hydrofluoric acid solution were employed 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 measured 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-rich peralkaline silicate melts is obviously higher and increases with increasing Na2O/K2O 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. |
| |
| Keywords: | silicate melt solubility experimental study |
| 本文献已被 CNKI 等数据库收录！ |
|
