| An Experimental Styudy on Gold Solubility in Amino Acid Solution and Its Geological Significance |
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| 作者姓名： | 张景荣 陆建军 |
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| 作者单位： | [1]DepartmentofEarthSciences,NanjingUniversity,Nanjing,210093 [2]DepartmentofEarthSciences,NanjingUniversit |
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| 摘 要： | The experiments on gold solubility in amino acid solution mdicate that gold is very intensively soluble in amino acid(or other organic acids),which is extensively present in geological bodies,and is most soluble in histidine.The temperature and concentration,acidity and type of amino acid in the solution are important factors affecting gold-amino acid complexing. The solubility of gold in amino acid is different under different conditions of temperature, amino acid concentration and pH value of the solution,At 80℃ and pH=6-8,gold is most soluble in amino acid.Gold dispersed in water and rocks could be concentrated and transported by amino acid and then precipitated in favorable loci.Amino acids might have played an important role in metallogenesis as well as in the formation of source beds of gold.Nitrogen,oxygen and sulfur in amino acid might have reacted with gold to form soluble complex ions.
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| 关 键 词： | 氨基酸 金矿床 溶解度 地质特征 有机酸 PH值 温度 |
An experimental study on gold solubility in amino acid solution and its geological significance |
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| Zhang Jingrong,Lu Jianjun,Yang Fan,Wu Jingwei,Zhu Fahua.An Experimental Styudy on Gold Solubility in Amino Acid Solution and Its Geological Significance[J].Chinese Journal of Geochemistry,1996,15(4):296-302. |
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| Authors: | Zhang Jingrong Lu Jianjun Yang Fan Wu Jingwei Zhu Fahua |
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| Institution: | (1) Department of Earth Sciences, Nanjing University, 210093 Nanjing |
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| Abstract: | The experiments on gold solubility in amino acid solution indicate that gold is very intensively soluble in amino acid (or
other organic acids), which is extensively present in geological bodies, and is most soluble in histidine. The temperature
and concentration, acidity and type of amino acid in the solution are important factors affecting gold-amino acid complexing.
The solubility of gold in amino acid is different under different conditions of temperature, amino acid concentration and
pH value of the solution. At 80°C and pH=6–8, gold is most soluble in amino acid. Gold dispersed in water and rocks could
be concentrated and transported by amino acid and then precipitated in favorable loci. Amino acids might have played an important
role in metallogenesis as well as in the formation of source beds of gold. Nitrogen, oxygen and sulfur in amino acid might
have reacted with gold to form soluble complex ions.
This project was financially supported by the National Natural Science Foundation of China (No. 9488010). |
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| Keywords: | amino acid gold deposit solubility experiment complex |
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