Timing of chaotic terrain formation in Argadnel Regio, Europa, and implications for geological history
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Título: | Timing of chaotic terrain formation in Argadnel Regio, Europa, and implications for geological history |
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Autor/es: | Parro, Laura M. | Ruiz, Javier | Pappalardo, Robert T. |
Grupo/s de investigación o GITE: | Astronomía y Astrofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías |
Palabras clave: | Europa | Jupiter, Satellites | Chaos | Geological history | Surfaces | Geological processes |
Fecha de publicación: | 15-feb-2016 |
Editor: | Elsevier |
Cita bibliográfica: | Planetary and Space Science. 2016, 130: 24-29. https://doi.org/10.1016/j.pss.2016.02.002 |
Resumen: | Chaos terrains are among the most prominent landforms of Europa, and are generally among the youngest features recorded on the surface. Chaos units were formed by to endogenic activity, maybe related to solid-state convection and thermal diapirism in the ice shell, perhaps aided by melting of salt-rich ice bodies below the surface. In this work, we analyze the different units of chaotic terrain in a portion of Argadnel Regio, a region located on the anti-Jovian hemisphere of Europa, and their possible timing in the general stratigraphic framework of this satellite. Two different chaos units can be differentiated, based on surface texture, morphology, and cross-cutting relationships with other units, and from interpretations based on pre-existing surface restoration through elimination of a low albedo band. The existence of two stratigraphically different chaos units implies that conditions for chaos formation occurred during more than a single discreet time on Europa, at least in Argadnel Regio, and perhaps in other places. The existence of older chaos units on Europa might be related to convective episodes possibly favored by local conditions in the icy shell, such as variations in grain size, abundance of non-water ice-components, or regional thickness of the brittle lithosphere or the entire ice shell. |
Patrocinador/es: | Work by LMP was initially supported by a Beca-Colaboración from the Ministerio de Educación, Cultura y Deporte of Spain. Work by JR was supported by a contract Ramón y Cajal (RYC-2009-05082) co-financed from the Ministerio de Economía y Competitividad of Spain and the European Social Fund. The portion of this work performed by RTP was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. |
URI: | http://hdl.handle.net/10045/140304 |
ISSN: | 0032-0633 (Print) | 1873-5088 (Online) |
DOI: | 10.1016/j.pss.2016.02.002 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2016 Elsevier Ltd. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.pss.2016.02.002 |
Aparece en las colecciones: | INV - Astronomía y Astrofísica - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Parro_etal_2016_PSS_final.pdf | Versión final (acceso restringido) | 4,75 MB | Adobe PDF | Abrir Solicitar una copia |
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