FORMATION OF HARZBURGITE BY PERVASIVE MELT ROCK REACTION IN THE UPPER MANTLE

被引：610

作者：

KELEMEN, PB ^{[1
]}

DICK, HJB ^{[1
]}

QUICK, JE ^{[1
]}

机构：

[1] US GEOL SURVEY,DENVER FED CTR,DENVER,CO 80225

来源：

NATURE | 1992年 / 358卷 / 6388期

关键词：

D O I：

10.1038/358635a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Many mantle peridotite samples are too rich in SiO2 (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.

引用

页码：635 / 641

页数：7

共 60 条

[1] ABUNDANCES OF THE ELEMENTS - METEORITIC AND SOLAR [J].