方镁石
fāng měi shí
- periclase
方镁石
方镁石[fāng měi shí]
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根据高温高压相平衡实验资料，橄榄石、辉石这样的硅酸盐矿物在地幔深部的压力条件下可以分解成简单氧化物，如FeO（方铁矿）、MgO（方镁石）以及SiO2（斯石英）等。
High-pressure and high-temperature phase equilibrium experiments show that silicates such as olivine and pyroxene will be decomposed into simple oxides like FeO ( wustite ), MgO ( periclase ) and SiO-2 ( stishovite ) beneath the lower mantle ( 670 km ) .