The heat flow of Europa

The heat flow from Europa has profound implications for ice shell thickness and structure, as well as for the existence of an internal ocean, which is strongly suggested by magnetic data. The brittle–ductile transition depth and the effective elastic thickness of the lithosphere are here used to per...

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Detalles Bibliográficos
Autor: Ruiz Pérez, Javier
Tipo de recurso: artículo
Fecha de publicación:2007
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/49332
Acceso en línea:https://hdl.handle.net/20.500.14352/49332
Access Level:acceso abierto
Palabra clave:Europa
Satellites of Jupiter
Thermal histories
Tides
Solid body
Geodinámica
2507 Geofísica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/49332
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spelling The heat flow of EuropaRuiz Pérez, JavierEuropaSatellites of JupiterThermal historiesTidesSolid bodyGeodinámica2507 GeofísicaThe heat flow from Europa has profound implications for ice shell thickness and structure, as well as for the existence of an internal ocean, which is strongly suggested by magnetic data. The brittle–ductile transition depth and the effective elastic thickness of the lithosphere are here used to perform heat flow estimations for Europa. Results give preferred heat flow values (for a typical geological strain rate of (10−15 s-1) of 70–110 mWm−2 for a brittle–ductile transition 2 km deep (the usually accepted upper limit for the brittle–ductile transition depth in the ice shell of Europa), 24–35mWm−2 for an effective elastic thickness of 2.9 km supporting a plateau near the Cilix impact crater, and >130 mWm−2 for effective elastic thicknesses of ≤0.4 km proposed for the lithosphere loaded by ridges and domes. These values are clearly higher than those produced by radiogenic heating, thus implying an important role for tidal heating. The >19–25 km thick ice shell proposed from the analysis of size and depth of impact structures suggests a heat flow of ≤30–45 mWm−2 reaching the ice shell base, which in turn would imply an important contribution to the heat flow from tidal heating within the ice shell. Tidally heated convection in the ice shell ould be capable to supply 100 mWm−2 for superplastic flow, and, at the Cilix crater region, 35–50 mWm−2 for dislocation creep, which suggests local variations in the dominant flow mechanism for convection. The very high heat flows maybe related to ridges and domes could be originated by preferential heating at special settingsElsevier Science B.V., AmsterdamUniversidad Complutense de Madrid20072007-01-0120072007-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/49332reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/493322026-06-02T12:44:21Z
dc.title.none.fl_str_mv The heat flow of Europa
title The heat flow of Europa
spellingShingle The heat flow of Europa
Ruiz Pérez, Javier
Europa
Satellites of Jupiter
Thermal histories
Tides
Solid body
Geodinámica
2507 Geofísica
title_short The heat flow of Europa
title_full The heat flow of Europa
title_fullStr The heat flow of Europa
title_full_unstemmed The heat flow of Europa
title_sort The heat flow of Europa
dc.creator.none.fl_str_mv Ruiz Pérez, Javier
author Ruiz Pérez, Javier
author_facet Ruiz Pérez, Javier
author_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv Europa
Satellites of Jupiter
Thermal histories
Tides
Solid body
Geodinámica
2507 Geofísica
topic Europa
Satellites of Jupiter
Thermal histories
Tides
Solid body
Geodinámica
2507 Geofísica
description The heat flow from Europa has profound implications for ice shell thickness and structure, as well as for the existence of an internal ocean, which is strongly suggested by magnetic data. The brittle–ductile transition depth and the effective elastic thickness of the lithosphere are here used to perform heat flow estimations for Europa. Results give preferred heat flow values (for a typical geological strain rate of (10−15 s-1) of 70–110 mWm−2 for a brittle–ductile transition 2 km deep (the usually accepted upper limit for the brittle–ductile transition depth in the ice shell of Europa), 24–35mWm−2 for an effective elastic thickness of 2.9 km supporting a plateau near the Cilix impact crater, and >130 mWm−2 for effective elastic thicknesses of ≤0.4 km proposed for the lithosphere loaded by ridges and domes. These values are clearly higher than those produced by radiogenic heating, thus implying an important role for tidal heating. The >19–25 km thick ice shell proposed from the analysis of size and depth of impact structures suggests a heat flow of ≤30–45 mWm−2 reaching the ice shell base, which in turn would imply an important contribution to the heat flow from tidal heating within the ice shell. Tidally heated convection in the ice shell ould be capable to supply 100 mWm−2 for superplastic flow, and, at the Cilix crater region, 35–50 mWm−2 for dislocation creep, which suggests local variations in the dominant flow mechanism for convection. The very high heat flows maybe related to ridges and domes could be originated by preferential heating at special settings
publishDate 2007
dc.date.none.fl_str_mv 2007
2007-01-01
2007
2007-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/49332
url https://hdl.handle.net/20.500.14352/49332
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier Science B.V., Amsterdam
publisher.none.fl_str_mv Elsevier Science B.V., Amsterdam
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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