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Agua asteroidal dentro de una inclusión fluida que contiene halita en una condrita H5, Monahans (1998)
M E Zolensky1, R J Bodnar, E K Gibson
1Mail Code SN2, NASA Johnson Space Center, Houston, TX 77058, USA.
Science (New York, N.Y.)
|August 28, 1999
Resumen
Las inclusiones de fluidos acuosos en los cristales de halita y silvita de condrita de Monahans revelan sales de cloruro de sodio y cloruro de potasio. Estas salmueras contienen cationes divalentes, lo que sugiere orígenes de fluidos internos de asteroides o cuerpos helados externos.
Área de la Ciencia:
- * Cosmoquímica y ciencia planetaria, centrada en los meteoritos y la composición de los asteroides.
- * Geoquímica de materiales extraterrestres y evolución de fluidos.
Sus antecedentes:
- * Los meteoritos, específicamente las condritas, proporcionan información sobre los primeros procesos del sistema solar.
- * La halita y la silvita son minerales de sal que pueden preservar la evidencia de ambientes acuosos pasados.
Objetivo del estudio:
- * Para analizar la composición de las inclusiones de fluidos acuosos dentro de la halita y la silvita de la condrita Monahans (1998) H5.
- * Para determinar el origen y la naturaleza de las salmueras atrapadas dentro de estos cristales de sal.
Principales métodos:
- * Análisis de inclusiones de fluidos dentro de cristales de halita y silvita.
- * Caracterización química de la composición de la salmuera, incluidos los cationes mayores y los iones divalentes.
Principales resultados:
- * Las inclusiones de fluidos contienen predominantemente salmueras de cloruro de sodio y cloruro de potasio.
- * Se detectaron cationes divalentes como el hierro, el magnesio y el calcio en las salmueras.
- * La presencia de estas salmueras indica la actividad acuosa pasada dentro del cuerpo madre.
Conclusiones:
- * Las salmueras analizadas probablemente se originaron de fluidos autóctonos dentro del asteroide o de entrega exógena de objetos helados ricos en sal.
- * Estos hallazgos contribuyen a comprender la historia del agua y los elementos volátiles en los asteroides.
Palabras clave:
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