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Updated: Sep 4, 2026
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Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions
Published on: June 13, 2015
Una inclusión de silicato en Puente del Zacate, un meteorito de hierro IIIA
E J Olsen1, A M Davis, R N Clayton
1Department of the Geophysical Sciences, University of Chicago, Chicago, IL 60637, USA.
Science (New York, N.Y.)
|September 6, 1996
Resumen
Las inclusiones de silicatos en el meteorito Puente del Zacate, similares a las de los hierros del IAB, sugieren la formación en núcleos de asteroides. Los isótopos de oxígeno vinculan esta inclusión con otros hierros IIIA y IIIB, posiblemente del manto del asteroide IIIAB.
Área de la Ciencia:
- * Ciencias planetarias Ciencias planetarias
- * Cosmoquímica es la cosmoquímica.
- * Mineralogía * Mineralogía * Mineralogía
Sus antecedentes:
- * Se cree que los meteoritos de hierro IIIA y IIIB se originan en núcleos de asteroides.
- * Las inclusiones de silicato que se encuentran en los meteoritos de hierro proporcionan información sobre sus entornos de formación.
- * El meteorito Puente del Zacate contiene una notable inclusión de silicatos con una mineralogía diversa.
Objetivo del estudio:
- * Para caracterizar la composición mineralógica y isotópica de oxígeno de una inclusión de silicato en el meteorito Puente del Zacate.
- * Para comparar la inclusión de Puente del Zacate con las inclusiones encontradas en otros grupos de meteoritos de hierro, particularmente IAB.
- * Para determinar el origen potencial y la ubicación de formación de la inclusión de Puente del Zacate dentro de su asteroide progenitor.
Principales métodos:
- * Análisis petrográfico de la inclusión de silicato en el meteorito Puente del Zacate.
- * Identificación mineralógica mediante microscopía electrónica y espectroscopía.
- * Análisis de isótopos de oxígeno de las fases minerales de la inclusión.
Principales resultados:
- * La inclusión de Puente del Zacate incluye olivino, piroxeno, plagioclase, grafito, troilita, cromita, daubreelita y metal de hierro.
- * El ensamblaje mineral muestra similitudes con las inclusiones encontradas en los meteoritos de hierro IAB.
- * La composición isotópica del oxígeno se alinea con las inclusiones de cromita y fosfato en los meteoritos de hierro IIIA y IIIB.
Conclusiones:
- * La inclusión de silicato Puente del Zacate comparte características con las inclusiones de los meteoritos de hierro IAB.
- * Su firma isotópica de oxígeno lo vincula con los cuerpos madre de los meteoritos de hierro IIIA y IIIB.
- * La inclusión probablemente se originó en el manto inferior del asteroide padre IIIAB.
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