Formation of harzburgite by pervasive melt/rock reaction in the upper mantle

来自 EBSCO

阅读量:

266

作者:

PB KelemenHJB DickJE Quick

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摘要:

Many mantle peridotite samples are too rich in Si0 2 (in the form of orthopyroxene) and have ratios of light to heavy rare earth elements that are too high to be consistent with an origin as the residuum of partial melting of the primitive mantle. Trace element studies of melt/rock reaction zones in the Trinity peridotite provide evidence for reaction of the mantle lithosphere with ascending melts, which dissolved calcium-pyroxene and precipitated orthopyroxene as magma mass decreased. This process can account for the observed major and trace element compositions of lithospheric mantle samples and may accordingly be prevalent in the upper mantle.

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DOI:

10.1038/358635a0

被引量:

1073

年份:

1992

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2014
被引量:70

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