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El contenido orgánico del meteorito del lago Tagish
S Pizzarello1, Y Huang, L Becker
1Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA.
Science (New York, N.Y.)
|August 25, 2001
Resumen
El meteorito prístino del lago Tagish contiene diversos compuestos orgánicos, incluidos ácidos e hidrocarburos. Su composición única de carbono ofrece nuevos conocimientos sobre la evolución química temprana del sistema solar.
Área de la Ciencia:
- Cosmoquímica es la cosmoquímica.
- Astrobiología Astrobiología.
- Ciencias planetarias Ciencias planetarias.
Sus antecedentes:
- Los meteoritos ofrecen pistas sobre la composición química del sistema solar temprano.
- Las condritas carbonáceas son particularmente importantes para el estudio de moléculas orgánicas.
- El meteorito del lago Tagish se considera excepcionalmente prístino.
Objetivo del estudio:
- Para analizar los compuestos orgánicos presentes en el meteorito del lago Tagish.
- Para investigar las características químicas de su material carbonoso.
- Para comprender la evolución química solar temprana a través del análisis de meteoritos.
Principales métodos:
- Análisis químico de compuestos orgánicos solubles.
- Caracterización del carbono insoluble, incluido el análisis isotópico.
- Identificación de fullerenos y gases nobles atrapados.
Principales resultados:
- Se identificaron aproximadamente 100 ppm de compuestos orgánicos solubles, incluidos varios ácidos e hidrocarburos.
- El carbono insoluble mostró carácter aromático, enriquecimiento de deuterio y fullerenos.
- Los fullerenos contenían helio y argón "planetarios", lo que indica un origen extraterrestre.
Conclusiones:
- El meteorito del lago Tagish contiene un complejo conjunto de moléculas orgánicas.
- Su composición única proporciona un claro ejemplo de la evolución química solar temprana.
- Este meteorito prístino mejora nuestra comprensión de la química prebiótica en el sistema solar.
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