Graphite in the martian meteorite Allan Hills 84001

被引：45

作者：

Steele, Andrew ^{[1
]}

McCubbin, Francis M. ^{[2
]}

Fries, Marc D. ^{[3
]}

Golden, D. C. ^{[4
]}

Ming, Douglas W. ^{[5
]}

Benning, Liane G. ^{[6
]}

机构：

[1] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

[2] Univ New Mexico, Inst Meteorit, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA

[3] Planetary Sci Inst, Tucson, AZ 85719 USA

[4] ESCG Hamilton Sundstrand, Houston, TX 77058 USA

[5] NASA, Lyndon B Johnson Space Ctr, Clear Lake Houston, TX 77058 USA

[6] Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England

来源：

AMERICAN MINERALOGIST | 2012年 / 97卷 / 07期

关键词：

Martian life; SNC; organic carbon; Mars Science Lab; Raman spectroscopy; magnetite; volatiles; THERMAL-DECOMPOSITION; SIDERITE FECO3; CARBONATE GLOBULES; TERRESTRIAL ANALOG; RAMAN-SPECTROSCOPY; ALH84001; TEMPERATURE; ALH-84001; STABILITY; MAGNETITE;

D O I：

10.2138/am.2012.4148

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：

We use confocal Raman imaging spectroscopy and transmission electron microscopy to study the martian meteorite Allan Hills (ALH) 84001, reported to contain mineral assemblages within carbonate globules (carbonate + magnetite), interpreted as potential relict signatures of ancient martian biota. Models for an abiologic origin for these assemblages required the presence of graphite, and this study is the first report of graphite within ALH 84001. The graphite occurs as hollow spheres (nano-onions), filaments, and highly crystalline particles in intimate association with magnetite in the carbonate globules. In addition to supporting an abiologic origin for the carbonate globule assemblages in ALH 84001, this work proves that there is an inventory of reduced-carbon phases on Mars that has not yet been thoroughly investigated.

引用

页码：1256 / 1259

页数：4

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