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06:04
Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 15, 2013
El vulcanismo de silicato de alta temperatura en la luna de Júpiter Io Io
A S McEwen1, L Keszthelyi, J R Spencer
1Lunar and Planetary Lab, University of Arizona, Tucson, AZ 85711, USA. mcewen@lpl.arizona.edu
Science (New York, N.Y.)
|July 4, 1998
Resumen
Yo también lo creo.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Volcanología Volcanología.
- La geoquímica es la geoquímica.
Sus antecedentes:
- Io, la luna volcánica de Júpiter, exhibe una actividad volcánica extrema.
- Las observaciones anteriores sugirieron altas temperaturas de erupción, pero las mediciones precisas fueron limitadas.
Objetivo del estudio:
- Para determinar las temperaturas de las erupciones de lava en Io.
- Para identificar la composición de las lavas volcánicas de Io.
Principales métodos:
- Se utilizaron datos de espectroscopia infrarroja de la nave espacial Galileo.
- Analizó las emisiones térmicas de al menos 12 respiraderos volcánicos distintos en Io.
- Aplicó modelos termodinámicos para estimar las temperaturas de la lava.
Principales resultados:
- Las temperaturas de lava observadas superan los 1700 Kelvin, y algunas alcanzan potencialmente los 2000 Kelvin.
- Se identificaron al menos 12 respiraderos volcánicos activos en Io.
- Tentativamente se identificó ortopiróxeno rico en magnesio en los flujos de lava, lo que sugiere una composición ultramafica.
Conclusiones:
- La lava volcánica de Io es significativamente más caliente que la lava basáltica de la Tierra.
- Las altas temperaturas apoyan la hipótesis de la composición de lava ultramafica en Io.
- Las observaciones de Galileo proporcionan una visión sin precedentes del volcanismo extremo de Io.
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