Compressibility change in iron-rich melt and implications for core formation models
Compressibility change in iron-rich melt and implications for core formation models
复制标题
富铁熔体的压缩性变化及其对核心形成模型的影响
DOI：
10.1016/j.epsl.2011.03.039
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发表时间：
2011
影响因子：
5.3
通讯作者：
J. Perrillat
中科院分区：
文献类型：
--
作者：
C. Sanloup;W. Westrenen;R. Dasgupta;H. Maynard;J. Perrillat
金属铁，无论是固态还是液态，都是地核的主要成分。对含有适量轻元素（5.7 wt.%碳）的铁液的密度测量表明，在δ-γ-液体三相点附近，在5.2 GPa处，可压缩性显著增加，从而确定了液-液转变。这一转变压力与镍、钴和钨在液态金属和硅酸盐熔体之间分布压力演化的显著变化相吻合，构成了岩心形成地球化学模型的基石。熔融金属多态性和金属硅酸盐元素分配之间的明确联系的确定意味着可靠的地球化学岩心形成模型将需要纳入这些额外的液态金属转变的影响。
Metallic iron, in both solid and liquid states, is the dominant component of Earth's core. Density measurements of molten iron containing an appropriate amount of light elements (5.7 wt.% carbon) identified a liquid–liquid transition by a significant compressibility increase in the vicinity of the δ-γ-liquid triple point at 5.2 GPa. This transition pressure coincides with a marked change in the pressure evolution of the distributions of nickel, cobalt and tungsten between liquid metal and silicate melt that form a cornerstone of geochemical models of core formation. The identification of a clear link between molten metal polymorphism and metal–silicate element partitioning implies that reliable geochemical core formation models will need to incorporate the effects of these additional liquid metal transitions.
影响因子：
56.9
作者：
Dubrovinsky, L.;Dubrovinskaia, N.;Abrikosov, I. A.
通讯作者：
Abrikosov, I. A.