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Phase equilibria and trace element partitioning in a magma ocean to 260 kilobarsA magma ocean can solidify in a way that is intermediate between perfect equilibrium and perfect fractional crystallization. In order to model quantitatively any fractional crystallization scenario, it is necessary to understand the geochemical characteristics of the phases that crystallize from a magma ocean, and how they vary with pressure. The crystallizing phase is called the liquidus phase, and their identities were determined by numerous experiments utilizing the multianvil apparatus. For chondritic compositions the liquidus phases are as follows: olivine at 1 atmosphere to 100 kilobars; garnet from 100 to about 260 kilobars; silicate perovskite from 260 kilobars to possibly the core-mantle boundary in the Earth.
Document ID
19920019352
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Herzberg, Claude
(Rutgers - The State Univ. New Brunswick, NJ, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Lunar and Planetary Inst., Workshop on the Physics and Chemistry of Magma Oceans from 1 Bar to 4 Mbar
Subject Category
Geophysics
Accession Number
92N28595
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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