Physics
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3116605l&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 16, CiteID L16605
Physics
5
Geochemistry: Chemical Evolution, Mineralogy And Petrology: Experimental Mineralogy And Petrology, Mineralogy And Petrology: Igneous Petrology, Mineralogy And Petrology: Major Element Composition
Scientific paper
The grain-scale processes of peridotite partial melting were examined at 1340°C and 1.5 GPa using reaction couples formed by juxtaposing pre-synthesized clinopyroxenite against pre-synthesized harzburgite. Reaction between clinopyroxenite and harzburgite produces a melt-enriched, orthopyroxene-free, olivine + clinopyroxene reactive boundary layer. Clinopyroxene compositions vary systematically across the reactive boundary layer with compositional trends similar to the published clinopyroxene core-to-rim compositional variations in the bulk lherzolite partial melting studies conducted at similar P-T conditions. The growth of the reactive boundary layer is at the expense of the harzburgite and is consistent with grain-scale processes that involve dissolution, reprecipitation, and diffusive exchange between the interstitial melt and surrounding crystals.
Hess Paul C.
Liang Yanbin
Lo Cascio Mauro
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