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¿Gases marcianos en un meteorito antártico?
Science (New York, N.Y.)
|August 12, 1983
Resumen
Los gases nobles atrapados en el meteorito Elephant Moraine 79001 muestran similitudes con los de Marte.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La meteorología es meteorítica.
- La geoquímica es la geoquímica.
Sus antecedentes:
- Los meteoritos acondríticos, como el Elephant Moraine 79001, ofrecen pistas sobre la formación de planetas.
- Los gases nobles atrapados dentro de los meteoritos pueden preservar las firmas atmosféricas.
Objetivo del estudio:
- Para analizar la composición de los gases nobles del meteorito Elephant Moraine 79001.
- Para comparar estos hallazgos con datos conocidos de gases nobles atmosféricos y de meteoritos.
Principales métodos:
- Análisis de gases nobles atrapados (argon, krypton, xenon) en las fases alteradas por el impacto del meteorito.
- Medición de la abundancia relativa de los elementos y de las relaciones isotópicas (por ejemplo, 40Ar/36Ar, 129Xe/132Xe).
Principales resultados:
- Se detectaron abundancias significativas de argón atrapado, criptón y xenón.
- Las relaciones isotópicas se parecen mucho a los datos de la atmósfera marciana (misión Viking).
- Estas proporciones difieren de los componentes típicos de los gases nobles de los meteoritos.
Conclusiones:
- La firma de gas noble sugiere un origen marciano para el meteorito Elephant Moraine 79001.
- Esto apoya las hipótesis geoquímicas anteriores sobre el origen de las shergottitas y los meteoritos relacionados.
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