Based on a brief analysis of the genesis of hematite, the authors hold that hematite in red granite was mostly produced under the condition of high oxygen fugacity.
本文对赤铁矿的成因作了简要分析，认为红色花岗岩中的赤铁矿大多为高氧逸度条件下的产物。
Under the influence of the subduction, the source mantle of the potassic lamprophyres has a high geothermal gradient and oxygen fugacity.
由于这种作用的影响，使钾质煌斑岩的源区地幔处于地温梯度高、氧逸度高的不稳定状态。
However, the temperatures and oxygen fugacity of magmas at high level magma chamber decreased along with fractional crystallization.
但在高位岩浆房中，随着分离结晶作用的进行，岩浆的温度和氧逸度逐渐降低。
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