Spinel in Martian meteorite SaU 008: implications for Martian magnetism

被引：21

作者：

Yu, YJ ^{[1
]}

Gee, JS ^{[1
]}

机构：

[1] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 2005年 / 232卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

Mars; spinel; SNC meteorites; SaU; 008; magnetism;

D O I：

10.1016/j.epsl.2004.12.015

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：

Shergotty-Nakhla-Chassigny (SNC) meteorites provide the only available samples of Martian material. The stable permanent magnetization of SNC meteorites has been traditionally attributed to magnetite (Fe3O4) or pyrrhotite (Fe7S8). On the basis of rock magnetic, microscopic, and electron microprobe analyses on rock chips and mineral separates, we suggest that a new material (Fe-Cr-Ti spinel) is responsible for the stable paleomagnetic record of Martian meteorite SaU 008. It is possible that SaU 008 acquired a primary remanence of thermal origin from the Martian crustal field. However, this proposition requires further testing because the effect of shock events on Fe-Cr-Ti spinel is unknown. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：287 / 294

页数：8

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