HIGH-PRESSURE AND HIGH-TEMPERATURE EXPERIMENTS ON CORE-MANTLE SEGREGATION IN THE ACCRETING EARTH

被引:81
作者
HILLGREN, VJ [1 ]
DRAKE, MJ [1 ]
RUBIE, DC [1 ]
机构
[1] UNIV BAYREUTH,BAYER GEOINST,D-95440 BAYREUTH,GERMANY
关键词
D O I
10.1126/science.264.5164.1442
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
The abundances of siderophile elements in the Earth's silicate mantle are too high for the mantle to have been in equilibrium with iron in the core if equilibrium occurred at low pressures and temperatures. It has been proposed that this problem may be solved if equilibrium occurred at high pressures and temperatures. Experimental determination of the distribution of siderophile elements between liquid metal and liquid silicate at 100 kilobar and 2000 degrees C demonstrates that it is unlikely that siderophile element abundances were established by simple metal-silicate equilibrium, which indicates that the segregation of the core from the mantle was a complex process.
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页码:1442 / 1445
页数:4
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