Mineralogy at Gusev crater from the Mossbauer spectrometer on the Spirit rover

被引：213

作者：

Morris, RV ^{[1
]}

Klingelhöfer, G

Bernhardt, B

Schröder, C

Rodionov, DS

de Souza, PA

Yen, A

Gellert, R

Evlanov, EN

Foh, J

Kankeleit, E

Gütlich, P

Ming, DW

Renz, F

Wdowiak, T

Squyres, SW

Arvidson, RE

机构：

[1] NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA

[2] Johannes Gutenberg Univ Mainz, Inst Anorgan & Analyt Chem, D-55128 Mainz, Germany

[3] IKI, Space Res Inst, Moscow, Russia

[4] CVRD Grp, Vitoria, Brazil

[5] CALTECH, Jet Prop Lab, Pasadena, CA USA

[6] Max Planck Inst Chem, D-55128 Mainz, Germany

[7] Tech Univ Darmstadt, Darmstadt, Germany

[8] Univ Alabama Birmingham, Birmingham, AL USA

[9] Cornell Univ, Ithaca, NY USA

[10] Washington Univ, St Louis, MO USA

来源：

SCIENCE | 2004年 / 305卷 / 5685期

关键词：

D O I：

10.1126/science.1100020

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：

Mossbauer spectra measured on Mars by the Spirit rover during the primary mission are characterized by two ferrous iron doublets ( olivine and probably pyroxene) and a ferric iron doublet ( tentatively associated to nanophase ferric iron oxide). Two sextets resulting from nonstoichiometric magnetite are also present, except for a coating on the rock Mazatzal, where a hematite-like sextet is present. Greater proportions of ferric-bearing phases are associated with undisturbed soils and rock surfaces as compared to fresh rock surfaces exposed by grinding. The ubiquitous presence of olivine in soil suggests that physical rather than chemical weathering processes currently dominate at Gusev crater.

引用

页码：833 / 836

页数：4

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