A new look at differentiation of the earth from melting experiments on the Allende meteorite

Details A new look at differentiation of the earth from melting experiments on the Allende meteorite A new look at differentiation of the earth from melting experiments on the Allende meteorite

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.346..834a&link_type=abstract

Nature (ISSN 0028-0836), vol. 346, Aug. 30, 1990, p. 834-837.

Computer Science

32

Allende Meteorite, Earth Mantle, Iron Oxides, Meteoritic Composition, Carbonaceous Chondrites, Earth Core, Electron Microscopy, Phase Transformations, Pressure Dependence, Ternary Systems

Scientific paper

The results of high-pressure melting experiments on the Allende CV3 carbonaceous chondrite are reported. Multianvil experiments at 24, 26, and 26.5 GPa show that FeO-rich magnesiowuestite is an abundant crystallizing phase at temperatures near the Allende silicate liquidus. If a chondritic earth experienced a high-temperature molten stage, then during cooling and crystallization FeO-rich magnesiowuestite could be segregated to the deepest levels of the earth's interior. Magnesiowuestite fractionation may thus have depleted the initial FeO content of the primitive chondritic mantle and contributed to the variation and growth of the earth's core.

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