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首页> 外文期刊>Contributions to Mineralogy and Petrology >Hydrogen incorporation in enstatite in the system MgO–SiO2–H2O–NaCl
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Hydrogen incorporation in enstatite in the system MgO–SiO2–H2O–NaCl

机译：MgO–SiO 2 –H 2 O–NaCl体系中顽辉石中的氢结合

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摘要

The incorporation of hydrogen in enstatite in a hydrous system containing various amounts of NaCl was investigated at 25 kbar. The hydrogen content in enstatite shows a clear negative correlation to the NaCl-concentration in the system. The most favourable explanation is the reduction of water fugacity due to dilution. Other reasons for the limited hydrogen incorporation at high NaCl levels, such as a significant influence of Na+ on the defect chemistry or an exchange between OH- and Cl−in enstatite, appear much less important. A partition coefficient D Na En/Fluid = 0.0013 could be determined, demonstrating that Na is less incompatible in enstatite than H. The new results support the idea that dissolved components have to be considered when the total hydrogen storage capacity in nominally anhydrous minerals is estimated, especially in geological settings with high levels of halogens, such as subduction zones.
机译：在25 kbar的条件下研究了氢在顽固辉石中的含水量，该含水系统含有各种NaCl。顽辉石中的氢含量与系统中的NaCl浓度呈明显的负相关。最有利的解释是稀释导致水混浊度降低。在高NaCl水平下氢结合受限的其他原因，例如Na + 对缺陷化学的显着影响或OH -和Cl -之间的交换在硬石膏中显得不那么重要。可以确定分配系数D Na En / Fluid = 0.0013，表明Na在顽辉石中的不相容性小于H。新结果支持以下观点：溶解的组分必须在估算名义上无水矿物中的总储氢量时应考虑在内，特别是在卤素含量高的地质环境中，例如俯冲带。

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