金在热液中的迁移形式TRANSPORT FORMS OF GOLD IN HYDROTHERMAL SOLUTIONS
汪东波
摘要(Abstract)：
有关现代地热体系及金矿床的流体包裹体的化学组成的系统的研究,结合高温高压下金的溶解度实验表明:形成金矿化的热液具有弱酸—中性—弱碱性(pH=pH_n+1~pH_n—1)的特征,HS~-,Cl~-,HCO_3~-是形成金的配合物的重要配体。在通常的弱酸—中性—弱碱性介质中,金主要以[Au(HS)_2]~-形式迁移,而在高温、强酸性、强氧化介质中金以[AuCl_2]~-,[AuCl_4]~-,Au_2Cl_6(HCl)_2(气态)形式迁移。虽然产生金矿化的溶液仅含ppb级的金,但是在充分长的时间和合适地质环境中也能沉淀成矿。
关键词(KeyWords)：
基金项目(Foundation):
作者(Author): 汪东波
参考文献(References)：
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