Evidence for K-rich terranes on Vesta from impact spherules

被引：35

作者：

Barrat, J. A. ^{[1
]}

Bohn, M. ^{[1
]}

Gillet, Ph ^{[2
]}

Yamaguchi, A. ^{[3
]}

机构：

[1] UBO IUEM, CNRS, UMR Domaines Ocean 6538, F-29280 Plouzane, France

[2] Univ Lyon, Ecole Normale Super Lyon, CNRS, Lab Sci Terre,UMR 5570, F-69364 Lyon 7, France

[3] Natl Inst Polar Res, Antarctic Meteorite Res Ctr, Itabashi Ku, Tokyo 1738515, Japan

来源：

METEORITICS & PLANETARY SCIENCE | 2009年 / 44卷 / 03期

关键词：

DAWN MISSION; SOLAR-SYSTEM; GEOCHEMISTRY; DIOGENITES; METEORITES; MINERALOGY; CHEMISTRY; PETROLOGY; MELTS; GLASS;

D O I：

10.1111/j.1945-5100.2009.tb00738.x

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：

The howardite-eucrite-diogenite (HED) clan is a group of meteorites that probably originate from the asteroid Vesta. Some of them are complex breccias that contain impact glasses whose compositions mirror that of their source regions. Some K-rich impact glasses (up to 2 wt% K(2)O) suggest that in addition to basalts and ultramafic cumulates, K-rich rocks are exposed on Vesta's surface. One K-rich glass (up to 6 wt% K(2)O), with a felsic composition, provides the first evidence of highly differentiated K-rich rocks on a large asteroid. They can be compared to the rare lunar granites and suggest that magmas generated in a large asteroid are more diverse than previously thought.

引用

页码：359 / 374

页数：16

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