The phase relations of Allende meteorite, which belongs to the CV carbonaceous chondrites, were investigated at 22-25 GPa and 1600-2300 • C. With increasing pressure, the liquidus phase changes from garnet to Mg-perovskite at about 24.5 GPa. Magnesiowüstite crystallizes as the second phase throughout the investigated pressure range, and the solidus curve coincides with the appearance of ringwoodite below 23 GPa, Mg-perovskite at 23-24 GPa and Ca-perovskite above 24 GPa. Immiscible silicate and metallic liquid phases are present in the entire melting range, and a single metallic liquid persists below the solidus down to at least 1600 • C. The Kd(Fe/Mg) crystal/silicateliq. is well below unity for magnesiowüstite (0.7-0.8), garnet (0.35-0.39) and Mg-perovskite (0.34). Ni and S are strongly partitioned into the metallic liquid, and the Ni and Fe partition coefficients between metallic liquid and coexisting minerals are relatively constant with variations in pressure or temperature. An important factor controlling D metalliq./crystal of Fe and Ni is the oxygen fugacity. Our results provide further constraints on models for early Earth differentiation and core formation.

Yuki Asahara

Tomoaki Kubo

Tadashi Kondo

Physics of The Earth and Planetary Interiors

《地球物理学》和《行星内部》于 1968 年推出，旨在满足行星物理学、大地测量学和地球物理学领域对国际期刊的需求，现已发展成为所有地球物理学家的重要阅读材料。它是唯一完全致力于行星内部物理和化学过程的期刊。原创研究论文、评论文章、短通讯和书评均定期发表；该杂志不时发布特刊，专门刊登编辑认为读者会特别感兴趣的专题讨论会和大会的会议记录。

"Physics of the Earth and Planetary Interiors" was launched in 1968 to meet the demand for an international journal in the fields of planetary physics, geodesy, and geophysics. It has since developed into an essential reading material for all geophysicists and is the only journal fully dedicated to the physical and chemical processes of planetary interiors. The journal regularly publishes original research papers, review articles, short communications, and book reviews, and occasionally releases special issues featuring conference proceedings and discussions on topics of particular interest to readers.

《Physics of the Earth and Planetary Interiors》创刊于1968年，旨在满足行星物理学、大地测量学和地球物理学领域对国际期刊的需求。该期刊现已成为所有地球物理学家的重要阅读材料，是唯一专注于行星内部物理和化学过程的期刊。期刊定期发表原创研究论文、评论文章、短通讯和书评，并不时发布特刊，专门刊登编辑认为读者会特别感兴趣的专题讨论会和大会的会议记录。

Category	Quartile
地球科学	3
地球科学, 地球化学与地球物理	3

Phase relations of a carbonaceous chondrite at lower mantle conditions

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Journal Info

Category	Quartile
GEOCHEMISTRY & GEOPHYSICS	2