| The mechanisms of paragenesis and separation of silver, lead and zinc in hydrothermal solutions |
| |
| 作者姓名： | 尚林波 胡瑞忠 樊文苓 |
| |
| 作者单位： | [1]KeyLaboratoryofOreDepositGeochemistry,InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang550002,China／／GraduateSchool,ChineseAcademyofSciences,Belting100039,China [2]KeyLaboratoryofOreDepositGeochemistry,InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang550002,China |
| |
| 基金项目： | DevelopmentandPlanningProjectofStateKeyBasicResearch(G1999042310) |
| |
| 摘 要： | On the basis of an experimental study and thermodynamic calculation, the mechanisms of paragenesis and separation of silver, lead and zinc in the hydrothermal system have been studied. At acidic to nearly neutral pH, their chloride complexes are stable, and among them the chloride complexes of zinc are most stable. And the sulfide complexes are the dominant species at nearly neutral to alkaline pH,while the sulfide complexes of silver are most stable. With decreasing temperature, Cl^-] ,fO2, and increasing pH, the solubilities of silver, lead and zinc will decrease, leading to their deposition and separation. For sulfide complexes, the concentrations of reduced sulfur and pH are two important factors affecting their stabilities. Complexes of different forms and stabilities respond to the variation of conditions to different extents, which gave rise to the paragenesis and separation of silver, lead and zinc in the whole ore-forming process of dissolution, transport and deposition.
|
| 关 键 词： | 热液动力学 共生分离 银 石墨 锌 分布规律 |
The mechanisms of paragenesis and separation of silver, lead and zinc in hydrothermal solutions |
| |
| Linbo Shang,Ruizhong Hu,Wenling Fan.The mechanisms of paragenesis and separation of silver, lead and zinc in hydrothermal solutions[J].Chinese Journal of Geochemistry,2005,24(1):82-89. |
| |
| Authors: | Linbo Shang Ruizhong Hu Wenling Fan |
| |
| Institution: | (1) Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550002 Guiyang, China;(2) Graduate School, Chinese Academy of Sciences, 100039 Beijing, China |
| |
| Abstract: | On the basis of an experimental study and thermodynamic calculation, the mechanisms of paragenesis and separation of silver, lead and zinc in the hydrothermal system have been studied. At acidic to nearly neutral pH, their chloride complexes are stable, and among them the chloride complexes of zinc are most stable. And the sulfide complexes are the dominant species at nearly neutral to alkaline pH,while the sulfide complexes of silver are most stable. With decreasing temperature, Cl- ], fo2 and increasing pH, the solubilities of silver, lead and zinc will decrease, leading to their deposition and separation. For sulfide complexes, the concentrations of reduced sulfur and pH are two important factors affecting their stabilities. Complexes of different forms and stabilities respond to the variation of conditions to different extents, which gave rise to the paragenesis and separation of silver, lead and zinc in the whole ore-forming process of dissolution, transport and deposition. |
| |
| Keywords: | silver lead zinc paragenesis and separation hydrothermal process thermodynamics |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
|
