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首页> 外文期刊>Contributions to Mineralogy and Petrology >Ferric/ferrous ratio in silicate melts: a new model for 1atm data with special emphasis on the effects of melt composition
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Ferric/ferrous ratio in silicate melts: a new model for 1atm data with special emphasis on the effects of melt composition

机译：硅酸盐熔融的铁/黑色合太铁：1ATM数据的新模型，特别强调熔体组成的影响

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摘要

The effect of MgO and total FeO on ferric/ferrous ratio in model multicomponent silicate melts was investigated experimentally in the temperature range 1300-1500 degrees C at 1atm total pressure in air. We demonstrate that the addition of these weak network modifier cations results in an increase of Fe3+/Fe2+ ratio in both mafic and silicic melts. Based on present and published experimental data, a new empirical equation is proposed to predict the ferric/ferrous ratio as a function of oxygen fugacity, temperature and melt composition. In contrast to previous equations, the compositional effect of melts on the Fe3+/Fe2+ ratio is not only modeled by the sum of the molar fraction of the individual oxide components. Additional interactions terms have also been incorporated. The main advantage of the proposed model is its applicability for a wide compositional range. However, its application to felsic melts (68wt% SiO2) is not recommended. Other advantages of this equation and differences when compared with previous models are discussed.
机译：MgO和总FeO对模型多组分硅酸盐熔体中的亚铁/铁比的影响在1ATM的空气中，在1ATM的总压力下实验研究了在700-1500℃的温度范围内进行研究。我们证明，添加这些弱网络改性剂阳离子导致镁发泡和硅熔体中的Fe3 + / Fe2 +比率增加。基于目前和公开的实验数据，提出了一种新的经验方程来预测氧气抗污水，温度和熔体组合物的亚铁/黑色合法。与先前的等式相比，熔体对Fe3 + / Fe2 +比的组成效果不仅通过各种氧化物组分的摩尔分数之和而建模。额外的互动条款也已被纳入。所提出的模型的主要优点是其适用于广泛的组成范围。但是，不建议将其应用于肠道熔体（＆ 68wt％siO2）。与先前模型相比，该方程式和差异的其他优点。

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