MANTLE PLUMES AND EPISODIC CRUSTAL GROWTH

被引：385

作者：

STEIN, M ^{[1
]}

HOFMANN, AW ^{[1
]}

机构：

[1] MAX PLANCK INST CHEM, D-55020 MAINZ, GERMANY

来源：

NATURE | 1994年 / 372卷 / 6501期

关键词：

D O I：

10.1038/372063a0

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 hitherto puzzling features of the isotope and trace-element geochemistry of the Earth's mantle and crust can be explained if Earth history is punctuated by episodes of enhanced exchange between the lower and upper mantle. Such episodes would replenish the upper mantle with trace elements, and also cause rapid growth of continental crust. This picture is consistent with recent geophysical models in which two-layer convection alternates with episodes of penetrative or whole-mantle convection.

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页码：63 / 68

页数：6

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