Physics
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988geokh......236k&link_type=abstract
Geokhimiia (ISSN 0016-7525), Feb. 1988, p. 236-245. In Russian.
Physics
Earth Mantle, Geophysical Fluids, Melting, Planetary Evolution, Rocks, Carbon Dioxide, Carbon Monoxide, Hydrogen, Methane, Volatility
Scientific paper
The effect of melting processes in the earth's mantle on the composition and the oxidation state of volatile elements in the mantle is examined. Large-scale melting is considered to be the major causative factor in the primary stages of the differentiation of volatile elements. It is suggested that the initial stages of the fractionation of the volatile components of the magmatic ocean were characterized by the separation of reduced gaseous compounds (such as CO, H2, and CH4), while late fractionation stages were characterized by the separation of oxidized gas molecules (such as CO2 and H2O), leading to the ultimate oxidation of the mantle matter and to the accumulation of CO2. Furthermore, it is considered that the migration of reduced fluids of the lower mantle initiated the melting process in the relatively oxidized rocks of the upper mantle and the lithosphere.
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