Calcium-aluminum-rich inclusions from enstatite chondrites: Indigenous or foreign?

被引：63

作者：

Guan, YB ^{[1
]}

Huss, GR

MacPherson, GJ

Wasserburg, GJ

机构：

[1] Smithsonian Inst, Natl Museum Nat Hist, Dept Mineral Sci, Washington, DC 20560 USA

[2] CALTECH, Div Geol & Planetary Sci 170 25, Lunat Asylum, Pasadena, CA 91125 USA

[3] Arizona State Univ, Ctr Meteorite Studies, Tempe, AZ 85287 USA

[4] Arizona State Univ, Dept Geol, Tempe, AZ 85287 USA

来源：

SCIENCE | 2000年 / 289卷 / 5483期

关键词：

D O I：

10.1126/science.289.5483.1330

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 primary mineral assemblages and initial Al-26/Al-27 ratios of rare calcium-aluminum-rich inclusions (CAIs) from enstatite (E) chondrites are similar to those of CAIs from other chondrite classes. CAIs from all chondrite classes formed under oxidizing conditions that are much different from the reducing conditions under which the E chondrites formed. Either CAIs formed at an earlier, more oxidizing epoch in the region where E chondrites ultimately formed, or they formed at a different place in the solar nebula and were transported into the E chondrite formation region.

引用

页码：1330 / 1333

页数：4

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