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Magnesium peridotites

Serpentinite A metamorphic rock derived from the hydration of iron- and magnesium-rich minerals, such as olivine and pyroxenes, in peridotites and other ultramafic igneous rocks. [Pg.465]

Secondary alteration processes are also responsible for element deviations, particularly the strong depletion of calcium and sodium relative to aluminum in some abyssal peridotites, as well as part of the scattered variations of silicon, magnesium, calcium, and sodium. Serpentinized, orogenic and ophiolitic peridotites may also be strongly depleted in calcium and sodium. However, these samples are rare in the selected database for peridotite massifs, which includes only moderately serpentinized samples. [Pg.823]

Snow J. E. and Dick H. J. B. (1995) Pervasive magnesium loss by marine weathering of peridotite. Geochim. Cosmochim. Acta 59, 4219 -4235. [Pg.870]

The commonly used model for calcium-carbo-natite genesis involves partial melting of a carbonate-bearing peridotite, forming a carbonate-rich silicate melt that upon ascent produces immiscible calcium-rich carbonate and magnesium-rich silicate melts (e.g., Lee and Wyllie,... [Pg.1025]

See other pages where Magnesium peridotites is mentioned: [Pg.312]    [Pg.312]    [Pg.66]    [Pg.66]    [Pg.235]    [Pg.380]    [Pg.326]    [Pg.354]    [Pg.21]    [Pg.711]    [Pg.756]    [Pg.822]    [Pg.823]    [Pg.826]    [Pg.827]    [Pg.828]    [Pg.888]    [Pg.888]    [Pg.895]    [Pg.911]    [Pg.939]    [Pg.1029]    [Pg.1030]    [Pg.1036]    [Pg.1042]    [Pg.1134]    [Pg.1354]    [Pg.1614]    [Pg.1617]    [Pg.1627]    [Pg.1788]    [Pg.1826]    [Pg.1867]    [Pg.3056]    [Pg.7]    [Pg.52]    [Pg.120]    [Pg.121]    [Pg.124]    [Pg.125]    [Pg.126]    [Pg.186]   
See also in sourсe #XX -- [ Pg.119 , Pg.124 , Pg.125 ]



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Peridotites

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