Magnetic properties experiments on the Mars Pathfinder lander: preliminary results.
Science
; 278(5344): 1768-70, 1997 Dec 05.
Article
en En
| MEDLINE
| ID: mdl-9388172
ABSTRACT
Many of the particles currently suspended in the martian atmosphere are magnetic, with an average saturation magnetization of about 4 A. m2/kg (amperes times square meters per kilogram). The particles appear to consist of claylike aggregates stained or cemented with ferric oxide (Fe2O3); at least some of the stain and cement is probably maghemite (gamma-Fe2O3). The presence of the gamma phase would imply that Fe2+ ions leached from the bedrock, passing through a state as free Fe2+ ions dissolved in liquid water. These particles could be a freeze-dried precipitate from ground water poured out on the surface. An alternative is that the magnetic particles are titanomagnetite occurring in palagonite and inherited directly from a basaltic precursor.
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Base de datos:
MEDLINE
Asunto principal:
Marte
/
Medio Ambiente Extraterrestre
/
Magnetismo
Idioma:
En
Revista:
Science
Año:
1997
Tipo del documento:
Article
País de afiliación:
Dinamarca