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Updated: Jun 24, 2026

Simulation of the Planetary Interior Differentiation Processes in the Laboratory

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Published on: November 16, 2013

Estado redox del manto superior y la corteza de Marte debido a las anomalías de Eu en los piroxenos shergotticos

¹Department of Geology, The Field Museum, 1400 South Lake Shore Drive, Chicago, IL 60605, USA. mwadhwa@fieldmuseum.org

Science (New York, N.Y.)

|February 27, 2001

Resumen

Los meteoritos marcianos revelan distintos estados de oxidación entre el manto y la corteza del planeta. Esta diferencia, evidenciada por la partición de europium, sugiere la oxidación de la corteza terrestre a través de la alteración acuosa y el reciclaje limitado de la corteza en el manto.

Área de la Ciencia:

Ciencias planetarias Ciencias planetarias.
La geoquímica es la geoquímica.
La mineralogía es la Mineralogía.

Sus antecedentes:

Los meteoritos marcianos basálticos proporcionan información crucial sobre la historia geológica del Planeta Rojo.
Comprender el estado de oxidación de los depósitos marcianos es clave para descifrar su evolución.

Objetivo del estudio:

Para determinar el estado de oxidación de los meteoritos marcianos basálticos.
Para correlacionar las condiciones redox con las composiciones isotópicas e inferir las interacciones manto-corteza.

Principales métodos:

Análisis de la partición del europio (Eu) en piroxenos de los meteoritos marcianos.
Comparación de las condiciones redox estimadas con los datos isotópicos de neodimio y estroncio.

Principales resultados:

Las condiciones redox estimadas se correlacionan con las composiciones isotópicas iniciales de neodimio y estroncio.
La evidencia sugiere una interacción entre los fundidos derivados del manto y un componente de la corteza.
La fuente del manto marciano probablemente esté cerca del amortiguador de hierro-wüstita; la corteza está más oxidada.

Conclusiones:

Existe una diferencia de redox significativa (más de 3 unidades log) entre el manto marciano y la corteza.
La alteración acuosa probablemente oxidó la corteza marciana.
El reciclaje limitado de la corteza oxidada en el manto superior reducido puede explicar la dicotomía redox.

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