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地幔的氧化还原状态一直是地球演化史中一个非常关键但又悬而未决的科学问题。理论和实验研究表明,地球具有一个液态金属外核,深部地幔的高度还原环境可以沉淀铁合金。铁以极高的丰度存在于地球深部,对于深部地幔的物理化学性质具有深远的影响。然而,由于现有的技术条件难以实现地球深部的直接观测,而上涌的地幔来源熔体产生的玄武质岩浆和
The redox state of the mantle has always been a crucial but unanswered scientific issue in the evolution of the Earth. Theoretical and experimental studies show that the earth has a liquid metal outer core, and the highly reduced environment of the deep mantle can precipitate ferroalloys. The presence of iron in deep earth at very high abundance has far-reaching implications for the physico-chemical properties of the deep mantle. However, because of the existing technical conditions, it is difficult to realize the direct observation of the deep earth, while the basaltic magma produced by the upwelling mantle-derived melt and