Mars: a new core-crystallization regime.
Science
; 316(5829): 1323-5, 2007 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-17540900
ABSTRACT
The evolution of the martian core is widely assumed to mirror the characteristics observed for Earth's core. Data from experiments performed on iron-sulfur and iron-nickel-sulfur systems at pressures corresponding to the center of Mars indicate that its core is presently completely liquid and that it will not form an outwardly crystallizing iron-rich inner core, as does Earth. Instead, planetary cooling will lead to core crystallization following either a "snowing-core" model, whereby iron-rich solids nucleate in the outer portions of the core and sink toward the center, or a "sulfide inner-core" model, where an iron-sulfide phase crystallizes to form a solid inner core.
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Base de dados:
MEDLINE
Assunto principal:
Marte
/
Evolução Planetária
Idioma:
En
Ano de publicação:
2007
Tipo de documento:
Article