The very early thermal state of Terra Cimmeria: Implications for magnetic carriers in the crust of Mars

Large areas of strongly magnetized crust are located in Terra Cimmeria and Terra Sirenum, in the southern highlands of Mars, the older terrains on the planet. The typical depth to the base of the magnetized layer, deduced from the magnetic spectrum of Mars and modeling of isolated magnetic anomalies...

Descripción completa

Detalles Bibliográficos
Autor: Ruiz Pérez, Javier
Tipo de recurso: artículo
Fecha de publicación:2009
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:español
OAI Identifier:oai:docta.ucm.es:20.500.14352/49352
Acceso en línea:https://hdl.handle.net/20.500.14352/49352
Access Level:acceso abierto
Palabra clave:550.2
Mars
Magnetic fields
Mars-Climate
Geodinámica
2507 Geofísica
id ES_705f2b68e99e3ebebf86bfb441bc5014
oai_identifier_str oai:docta.ucm.es:20.500.14352/49352
network_acronym_str ES
network_name_str España
repository_id_str
spelling The very early thermal state of Terra Cimmeria: Implications for magnetic carriers in the crust of MarsRuiz Pérez, Javier550.2MarsMagnetic fieldsMars-ClimateGeodinámica2507 GeofísicaLarge areas of strongly magnetized crust are located in Terra Cimmeria and Terra Sirenum, in the southern highlands of Mars, the older terrains on the planet. The typical depth to the base of the magnetized layer, deduced from the magnetic spectrum of Mars and modeling of isolated magnetic anomalies, would 40–60 km. In this paper the thermal state of Terra Cimmeria is revisited by calculating heat flows and crustal geotherms consistent with a previous estimation of the effective elastic thickness of the lithosphere, and with crustal abundances of heat-producing elements based on surface measurements performed by the Mars Odyssey Gamma Ray Spectrometer. The results suggest that, at the time of formation of the magnetized terrains surface (which have a minimum age of 4.1 Ga), Curie depths for magnetite and hematite were shallower and similar, respectively, than the typical depth to the base of the magnetized layer. This implies that hematite is an important (if not dominant) contributor to the magnetization of the martian crust. However, an early warm climate would enhance the chance of magnetite to be a significant, even dominant, magnetization carrier in the lower portion of the magnetic layer.Rosen Pub. GroupUniversidad Complutense de Madrid20092009-01-0120092009-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/49352reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Españolspaopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/493522026-06-02T12:44:21Z
dc.title.none.fl_str_mv The very early thermal state of Terra Cimmeria: Implications for magnetic carriers in the crust of Mars
title The very early thermal state of Terra Cimmeria: Implications for magnetic carriers in the crust of Mars
spellingShingle The very early thermal state of Terra Cimmeria: Implications for magnetic carriers in the crust of Mars
Ruiz Pérez, Javier
550.2
Mars
Magnetic fields
Mars-Climate
Geodinámica
2507 Geofísica
title_short The very early thermal state of Terra Cimmeria: Implications for magnetic carriers in the crust of Mars
title_full The very early thermal state of Terra Cimmeria: Implications for magnetic carriers in the crust of Mars
title_fullStr The very early thermal state of Terra Cimmeria: Implications for magnetic carriers in the crust of Mars
title_full_unstemmed The very early thermal state of Terra Cimmeria: Implications for magnetic carriers in the crust of Mars
title_sort The very early thermal state of Terra Cimmeria: Implications for magnetic carriers in the crust of Mars
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 550.2
Mars
Magnetic fields
Mars-Climate
Geodinámica
2507 Geofísica
topic 550.2
Mars
Magnetic fields
Mars-Climate
Geodinámica
2507 Geofísica
description Large areas of strongly magnetized crust are located in Terra Cimmeria and Terra Sirenum, in the southern highlands of Mars, the older terrains on the planet. The typical depth to the base of the magnetized layer, deduced from the magnetic spectrum of Mars and modeling of isolated magnetic anomalies, would 40–60 km. In this paper the thermal state of Terra Cimmeria is revisited by calculating heat flows and crustal geotherms consistent with a previous estimation of the effective elastic thickness of the lithosphere, and with crustal abundances of heat-producing elements based on surface measurements performed by the Mars Odyssey Gamma Ray Spectrometer. The results suggest that, at the time of formation of the magnetized terrains surface (which have a minimum age of 4.1 Ga), Curie depths for magnetite and hematite were shallower and similar, respectively, than the typical depth to the base of the magnetized layer. This implies that hematite is an important (if not dominant) contributor to the magnetization of the martian crust. However, an early warm climate would enhance the chance of magnetite to be a significant, even dominant, magnetization carrier in the lower portion of the magnetic layer.
publishDate 2009
dc.date.none.fl_str_mv 2009
2009-01-01
2009
2009-01-01
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/20.500.14352/49352
url https://hdl.handle.net/20.500.14352/49352
dc.language.none.fl_str_mv Español
spa
language_invalid_str_mv Español
language spa
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 Rosen Pub. Group
publisher.none.fl_str_mv Rosen Pub. Group
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
_version_ 1869410576221863936
score 15.300724

Similares en LA Referencia