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Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 16, 2013
Océanos de magma extendidos en cuerpos de asteroides en el Sistema Solar temprano
Richard C Greenwood1, Ian A Franchi, Albert Jambon
1PSSRI, Open University, Walton Hall, Milton Keynes MK7 6AA, UK. r.c.greenwood@open.ac.uk
Nature
|June 17, 2005
Resumen
Los planetesimales del Sistema Solar temprano sufrieron una fusión a escala global, formando océanos de magma. Este proceso creó cuerpos en capas, influyendo en la composición de planetas como la Tierra.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Cosmoquímica es la cosmoquímica.
- Geología Geología Geología.
Sus antecedentes:
- Los cuerpos planetarios se formaron temprano en la historia del Sistema Solar.
- Se debate la actividad ígnea de los asteroides, con teorías que van desde el derretimiento a pequeña escala hasta los océanos de magma.
- La composición de los primeros cuerpos planetarios influyó en la estructura final de los planetas.
Objetivo del estudio:
- Para investigar la naturaleza de la actividad ígnea temprana de los asteroides.
- Para determinar si los océanos de magma eran comunes en los cuerpos diferenciados del Sistema Solar.
- Comprender cómo los primeros procesos planetarios afectaron la composición planetaria.
Principales métodos:
- Análisis de isótopos de oxígeno de las suites de meteoritos basálticos (HED y angritas).
- Estudiando meteoritos del asteroide 4 Vesta (HED) y una fuente no identificada (angritas).
Principales resultados:
- Evidencia de eventos tempranos de fusión a escala global (>50%) tanto en el HED como en las suites de meteoritos de angrita.
- Confirmación de océanos de magma en todos los cuerpos diferenciados del Sistema Solar muestreados.
- Los océanos de magma llevaron a planetesimales con capas de composición.
Conclusiones:
- Los planetesimales del Sistema Solar temprano experimentaron una fusión global significativa.
- Los océanos de magma fueron un fenómeno generalizado en el Sistema Solar temprano.
- Los planetesimales en capas formados por océanos de magma pueden explicar características planetarias anómalas, como la alta relación Mg / Si de la Tierra.
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