Abstract
The oxidation and dissolution of metallic iron in silicate melts were investigated. The base composition consisted of Idaho soil with quartz and potassium feldspars as primary phases. Iron immersed in melts of unaltered soil and SiO2‐K2O underwent minimal oxidation at 1400°C. Melts consisting of soil, 10 wt% of added K2O, and 5‐20 wt% of added Fe2O3 were capable of dissolving Fe. Progressively greater Fe dissolution occurred with increasing Fe2O3 content. A melt containing 20 wt% Fe2O3 dissolved 10 wt% Fe within 3 h. Melts containing greater than 10 wt% Fe2O3 crystallized almost entirely as magnetite (Fe3O4) and augite (Ca(Mg,Fe(2+))(SiO3)2). The data obtained also suggest that added Fe2O3 contributed to an increased rate of oxygen diffusion in these melts.
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