New extreme 16O-rich reservoir in the early solar system

被引：91

作者：

Kobayashi, S ^{[1
]}

Imai, H ^{[1
]}

Yurimoto, H ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Earth & Planetary Sci, Meguro Ku, Tokyo 1528551, Japan

来源：

GEOCHEMICAL JOURNAL | 2003年 / 37卷 / 06期

关键词：

D O I：

10.2343/geochemj.37.663

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

An enrichment of oxygen-16 of about 8% relative to the Earth has been found in a chondrule from the Acfer 214 carbonaceous chondrite. In contrast, isotopic abundances of major cations, Mg and Si, are similar to those of the Earth. These suggest that oxygen isotopic heterogeneity in the early solar system was much larger ever thought and assist mass-independent-isotopic fractionation for the origin. Because the chondrule has solar abundance for refractory and normal lithophile elements, we propose that silicate dusts in the early solar system were initially enriched in O-16 corresponding to the O-16-rich reservoir.

引用

页码：663 / 669

页数：7

共 27 条

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