The Review of High Pressure Science and Technology
Online ISSN : 1348-1940
Print ISSN : 0917-639X
ISSN-L : 0917-639X
Reviews—Chemical Heterogeneity in the Deep Earth—
Differentiation in the Early Earth's Interior: Constraints from Isotope Geochemistry and High-Pressure Experiments
Tetsu KOGISONozomi KONDO
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2017 Volume 27 Issue 4 Pages 256-265

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Abstract

We conducted isotopic model calculations and high-pressure melting experiments in order to estimate the major element composition of the “missing reservoir”, which is a supposed component that should compensate the difference in 142Nd/144Nd ratio between the bulk silicate Earth and carbonaceous chondrite, from which the Earth is assumed to have formed. Our estimation demonstrated that the missing reservoir should have picritic to komatiitic composition, and that it was likely to have been lost from the Earth's surface by a giant impact event at the last stage of the Earth formation.

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© 2017 The Japan Society of High Pressure Science and Technology
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