El origen de las Islas Canarias: un modelo de síntesis

A new model, partially based on the three most widely cited previous hypotheses, Is proposed to explain the genesis of the Canary Islands. From the hotspot hypothesis it retains the notion that the islands originated from a thermal anomaly in the mantle. From the propagating fracture hypothesis it t...

Descripción completa

Detalles Bibliográficos
Autores: Anguita Virella, Francisco, Hernán, F.
Tipo de recurso: artículo
Fecha de publicación:2000
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:español
OAI Identifier:oai:docta.ucm.es:20.500.14352/57965
Acceso en línea:https://hdl.handle.net/20.500.14352/57965
Access Level:acceso abierto
Palabra clave:552.3
Canary Islands
Volcanology
Hotspots
Fracture volcanism
Petrología
id ES_b942ff540ae844ecd9c7efa938d07f4e
oai_identifier_str oai:docta.ucm.es:20.500.14352/57965
network_acronym_str ES
network_name_str España
repository_id_str
spelling El origen de las Islas Canarias: un modelo de síntesisAnguita Virella, FranciscoHernán, F.552.3Canary IslandsVolcanologyHotspotsFracture volcanismPetrologíaA new model, partially based on the three most widely cited previous hypotheses, Is proposed to explain the genesis of the Canary Islands. From the hotspot hypothesis it retains the notion that the islands originated from a thermal anomaly in the mantle. From the propagating fracture hypothesis it takes the critical role of regional fractures in the onset of magmatism. The uplifted block hypothesis contributes with the notion that the islands are in their present freeboard attitude due to the action of tectonic forces. The main drawbacks of the three preceding hypotheses are solved within this unifying approach: the thermal anomaly is an upper mantle residue from an old plume, and therefore it does not carry (or does it in a highly diluted form) the typical geophysical and geochemical plume signatures; the fractures are well expressed on the continental and oceanic crust, but not in the extremely thick sedimentary pile between the Canary Islands and Africa; and the Canary Islands uplift took place through transpressive shears, and not by means of purely reverse faults. This unifying model is considered to be a valid approach to a number of volcanic areas where, as has been highlighted in recent years, pure hotspot or pure fracture models are found wanting to explain oceanic or continental volcanic lines.Sociedad Geológica de España.Universidad Complutense de Madrid20002000-01-0120002000-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/57965reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Españolspaopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/579652026-06-02T12:44:21Z
dc.title.none.fl_str_mv El origen de las Islas Canarias: un modelo de síntesis
title El origen de las Islas Canarias: un modelo de síntesis
spellingShingle El origen de las Islas Canarias: un modelo de síntesis
Anguita Virella, Francisco
552.3
Canary Islands
Volcanology
Hotspots
Fracture volcanism
Petrología
title_short El origen de las Islas Canarias: un modelo de síntesis
title_full El origen de las Islas Canarias: un modelo de síntesis
title_fullStr El origen de las Islas Canarias: un modelo de síntesis
title_full_unstemmed El origen de las Islas Canarias: un modelo de síntesis
title_sort El origen de las Islas Canarias: un modelo de síntesis
dc.creator.none.fl_str_mv Anguita Virella, Francisco
Hernán, F.
author Anguita Virella, Francisco
author_facet Anguita Virella, Francisco
Hernán, F.
author_role author
author2 Hernán, F.
author2_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 552.3
Canary Islands
Volcanology
Hotspots
Fracture volcanism
Petrología
topic 552.3
Canary Islands
Volcanology
Hotspots
Fracture volcanism
Petrología
description A new model, partially based on the three most widely cited previous hypotheses, Is proposed to explain the genesis of the Canary Islands. From the hotspot hypothesis it retains the notion that the islands originated from a thermal anomaly in the mantle. From the propagating fracture hypothesis it takes the critical role of regional fractures in the onset of magmatism. The uplifted block hypothesis contributes with the notion that the islands are in their present freeboard attitude due to the action of tectonic forces. The main drawbacks of the three preceding hypotheses are solved within this unifying approach: the thermal anomaly is an upper mantle residue from an old plume, and therefore it does not carry (or does it in a highly diluted form) the typical geophysical and geochemical plume signatures; the fractures are well expressed on the continental and oceanic crust, but not in the extremely thick sedimentary pile between the Canary Islands and Africa; and the Canary Islands uplift took place through transpressive shears, and not by means of purely reverse faults. This unifying model is considered to be a valid approach to a number of volcanic areas where, as has been highlighted in recent years, pure hotspot or pure fracture models are found wanting to explain oceanic or continental volcanic lines.
publishDate 2000
dc.date.none.fl_str_mv 2000
2000-01-01
2000
2000-01-01
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/20.500.14352/57965
url https://hdl.handle.net/20.500.14352/57965
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 Sociedad Geológica de España.
publisher.none.fl_str_mv Sociedad Geológica de España.
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_ 1869417757572857856
score 15.300719

Similares en LA Referencia