Magma transport and metasomatism in the mantle; a critical review of current geochemical models

Conflicting geochemical models of metasomatic interactions between mantle peridotite and melt all assume that mantle reactions reflect chromatographic processes. Examination of field, petrological and compositional data suggests that the hypothesis of chromatographic fractionation based on the suppo...

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Bibliographic Details
Published in:The American mineralogist 1993-12, Vol.78 (11-12), p.1117-1134
Main Authors: Nielson, J. E, Wilshire, H. G
Format: Article
Language:English
Subjects:
alkaline earth metals
Asia
California
chemical fractionation
crystallization
Dish Hill California
Europe
Far East
Fractionation
France
geochemical cycle
Geochemistry
Geology
harzburgite
Horoman Massif
igneous and metamorphic rocks
igneous rocks
inclusions
isotope ratios
isotopes
Japan
Lava
Lherz Massif
lherzolite
magmas
mantle
mantle metasomatism
metals
metasomatism
mineral composition
Nd-144/Nd-143
neodymium
P-T conditions
peridotites
Petrology
plutonic rocks
rare earths
Sr-87/Sr-86
stable isotopes
strontium
ultramafics
United States
upper mantle
Western Europe
xenoliths
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Summary:Conflicting geochemical models of metasomatic interactions between mantle peridotite and melt all assume that mantle reactions reflect chromatographic processes. Examination of field, petrological and compositional data suggests that the hypothesis of chromatographic fractionation based on the supposition of large- scale percolative processes needs review and revision.
ISSN:0003-004X
1945-3027