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Supervolcanes dentro de una antigua provincia volcánica en Arabia Terra, Marte
Joseph R Michalski1, Jacob E Bleacher
1Planetary Science Institute, Tucson, Arizona 85719, USA. michalski@psi.edu
Nature
|October 5, 2013
Resumen
Los científicos descubrieron un nuevo tipo de construcción volcánica marciana en Arabia Terra, cambiando nuestra comprensión del vulcanismo antiguo y la evolución del clima en Marte. Estas características, similares a los supervolcanes terrestres, sugieren un magmatismo temprano muy extendido.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Volcanología Volcanología.
- Geología Geología Geología.
Sus antecedentes:
- La región de Arabia Terra de Marte contiene numerosos cráteres de forma irregular.
- Las interpretaciones anteriores a menudo los clasificaban como cráteres de impacto.
Objetivo del estudio:
- Identificar y caracterizar un nuevo tipo de construcción volcánica en Marte.
- Reevaluar la historia geológica de Arabia Terra y sus implicaciones para la evolución del clima marciano.
Principales métodos:
- Análisis geomorfológico de cráteres de las tierras altas marcianas.
- Comparación con las características y procesos volcánicos terrestres.
Principales resultados:
- Identificación de pateras de bajo relieve con características indicativas de colapso estructural, volcanismo efusivo y explosivo.
- La evidencia sugiere que estas construcciones volcánicas contribuyeron a las llanuras de crestas y depósitos piroclásticos.
- El azufre desgaseado y los piroclásticos probablemente influyeron en la formación de rocas sedimentarias y terrenos con trenzas.
Conclusiones:
- La provincia volcánica de Arabia representa una provincia ígnea marciana no reconocida hasta ahora.
- Este descubrimiento altera fundamentalmente la comprensión del antiguo volcanismo marciano y el clima.
- Las cuencas erosionadas que anteriormente se pensaba que eran cráteres de impacto pueden ser construcciones volcánicas del magmatismo marciano temprano.
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