基于蒙乃尔合金溶解度新方法对金属在含氟热液流体中地球化学行为的实验研究  

An new experimental study on the geochemical behaviors of metals in fluorine-bearing hydrothermal fluids based on the Monel alloy solubility method

作　　者：徐柳林 刘敏[2] 袁顺达 王佳新[3] XU Liu-lin;LIU Min;YUAN Shun-da;WANG Jia-xin(School of Earth Science and Mineral Resources,China University of Geosciences,Beijing 100083,China;Institute of Natural Resources Strategic Development,China University of Geosciences,Beijing 100083,China;MNR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,CAGS,Beijing 100037,China)

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]中国地质大学(北京)自然资源战略发展研究院,北京100083 [3]中国地质科学院矿产资源研究所,自然资源部成矿作用与资源评价重点实验室,北京100037

出　　处：《矿物岩石地球化学通报》2025年第1期116-122,共7页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(42330814,42272092);中央级公益性科研院所基本科研业务费资助项目(KK2418)。

摘　　要：含氟热液流体在热液成矿系统中普遍发育,且能主导金属的迁移、富集和沉淀成矿过程。溶解度实验可以明确金属在含氟热液流体中的溶解度、迁移形式及其热力学参数,是研究金属在含氟热液成矿过程的有效手段。然而,由于传统特氟龙内衬溶解度实验方法材料运行温度(t≤250℃)的缺陷,制约了中高温成矿过程中金属在含氟流体的地球化学行为研究。本文首次将蒙乃尔合金应用于溶解度实验体系,通过测试蒙乃尔合金耐氟能力实验,初步确定蒙乃尔合金溶解度新方法在350℃高温条件具有良好的稳定性,并且初步开展锡在350℃条件下含氟流体中的溶解度实验,证实该方法是研究各类金属在中高温含氟流体中溶解度的有效手段。最后,对该方法的应用前景做了初步的展望,期望在与高温含氟热液流体相关的成矿金属地球化学行为研究中得到广泛的应用。Fluorine-rich hydrothermal fluids are ubiquitous in the ore-forming hydrothermal systems,playing a pivotal role in the ore-forming process including transportation,enrichment,and precipitation of metals.The solubility experiment can be used to determine the solubilities,migration patterns,and thermodynamic parameters of metals within these fluorine-rich hydrothermal fluids.It is effective means for investigating the metallogenic processes of metals associated with the fluorine-bearing hydrothermal fluid.However,the operational temperature limitations of materials(t≤250℃)in the traditional Teflon-lined solubility experimental methods had hampered the investigation of the geochemical behaviors of metals in the metallogenic process within the fluorine-bearing fluids at medium–high temperature.In this study,we have firstly applied Monel alloy to the solubility experiment system.Based on experiments for testing the fluorine resistance of Monel alloy,it is basically confirmed that Monel alloy applied in the new solubility experimental method has excellent stability at temperature of 350℃.Additionally,we have conducted the preliminary solubility experiments of tin in the fluorine-bearing fluid at 350℃,and have confirmed that this new method is an effective means for studying the solubilities of various metals in the fluorine-bearing fluid at medium–high temperature. Finally, apreliminary prospect of the application of this method has been outlined. It is expected that this method will be widely applied tostudy the geochemical behaviors of ore-forming metals associated with the high-temperature fluorine-bearing hydrothermal fluids.

关 键 词：蒙乃尔合金 高温含氟流体 溶解度实验 地球化学行为 成矿过程 

分 类 号：P599[天文地球—地球化学]