Magmatic differentiation

Rabinowicz M, Ceuleneer G, Monnereau M, Rosemberg C (1990) Three-dimensional models of mantle flow across a low-viscosity zone implications for hotspot dynamics. Earth Planet Sci Lett 99 170-184 Reid MR(1995) Processes of mantle enrichment and magmatic differentiation in the eastern Snake River Plain Th isotope evidence. Earth Planet Sci Lett, 131 239-254 Reid MR, Ramos FC (1996) Chemical dynamics of enriched mantle in the southwestern United States Thorium isotope evidence. Earth Planet Sci Lett, 138 67-81. 

Plyushin GS, Posokhov VF, Sandimirova GP (1979) Magmatic differentiation and the relationship of LF/Li ratio to fluorine content. Doklady 248 223-225... 

Explanation of magmatic differentiation patterns of transition metals... 

Curtis, C. D. (1964) Applications of the crystal-field theory to the inclusion of trace transition elements in minerals during magmatic differentiation. Geochim. Cosmochim. Acta, 28, 389-403. 

The Apollo 11 rocks contain large amounts of ilmenite, as can be seen from Tables 2 and 3 (high titanium content). We have plotted the chemical composition of rock sample 12018 in Fig. 3a vs. that of the carbonaceous chondrites (the most primitive of all meteorites), in Fig. 3b vs. the basaltic achondrite (eucrite) Juvinas (a class of meteorites which have undergone magmatic differentiation) and in Fig. 4 vs. the average composition of the Earth s... 

There cannot be any doubt that the lunar maria were formed by large lava flows2The basalts from the various landing sites differ in composition (Table 3), but samples from a single mare site are not uniform either. Fig. 5 plots the concentrations of Al vs. Mg in lunar basalts from Apollo 12. The observed trend can be accounted for by magmatic differentiation processes, with the variations in chemical composition reflecting origin at different depths. 

Correlations between pairs or groups of elements are of extraordinary significance, as from a limited number of samples collected at the surface elemental ratios can be determined for a whole planet, or at least for that fraction of the planet which underwent magmatic differentiation. 

The distinction between the two groups, lighter and heavier lanthanides is a consequence of magmatic differentiation and due to the small differences in ionic sizes. The ratio of light rare earth to heavy rare earths, La-Eu/Jj Gd-Lu, Y is different and depends on the type... 

The influx of magma from the mantle into the crust is the principal mechanism by which Earth s crust grows. Understanding the assembly of igneous rocks, whether those ejected at Earth s surface or those solidified within the crust, is therefore critical to our ability to delineate crustal evolution. Processes of magmatic differentiation, including crystal-liquid separation, crustal... 

Fuge R. (1977) On the behaviour of fluorine and chlorine during magmatic differentiation. Contrib. Mineral. Petrol. 61, 245-249. 

A correlation between He/" He ratios and an index of magmatic differentiation. For example, Gasparon et al. (1994) found lower He/ He ratios in more highly evolved phenocrysts (phenocrysts with a lower Mg ) from the Sunda arc, Indonesia. 

Harrington HJ (1958) Nomenclature of rock units in the Ross Sea region, Antarctica. Nature 182 209 Heier KS, Rogers JJW (1963) Radiometric determination of thorium, uranium, and potassium in basalts and in two magmatic differentiation series. Geochim Cosmochim Acta 27 137-154 Heier KS, McDougall I, Adams JAS (1964) Thorium, uranium, and potassium concentrations in Hawaiian lavas. Nature 201 254-256... 

The differentiated nonchondrites in Table 18.1 consist primarily of achondrites which are stony meteorites that lack chondrules and contain evidence of magmatic differentiation, including the segregation of liquid iron and nickel which are insoluble in silicate... 

Crystal Fractionation Separation of mineral crystals from a magma, typically by settling or flotation due to density differences, resulting in magmatic differentiation. 

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