The Holocene volcanism at El Hierro: insights from petrology and geochemistry
The Holocene volcanism at El Hierro consists of basaltic monogenetic volcanic fields associated with o the three rift systems present in this island. In this work we report preliminary petrological and geochemical data of Holocene lava flows belonging to the WNW-striking rift. Sampling was focused i...
| Autores: | , , , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Recursos: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/171438 |
| Acesso em linha: | https://hdl.handle.net/2445/171438 |
| Access Level: | acceso abierto |
| Palavra-chave: | Vulcanisme Petrologia Holocè Hierro (Canàries) Volcanism Petrology Holocene Hierro (Canary Islands) |
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The Holocene volcanism at El Hierro: insights from petrology and geochemistryAulinas Juncà, MeritxellDominguez, D.Rodriguez-Gonzalez, A.Carmona, H.Fernández Turiel, José LuisCarracedo, Juan C.Arienzo, I.D'Antonio, M.VulcanismePetrologiaHolocèHierro (Canàries)VolcanismPetrologyHoloceneHierro (Canary Islands)The Holocene volcanism at El Hierro consists of basaltic monogenetic volcanic fields associated with o the three rift systems present in this island. In this work we report preliminary petrological and geochemical data of Holocene lava flows belonging to the WNW-striking rift. Sampling was focused in three zones: Orchilla, Verodal-Sabinosa, and Tanganasoga. Petrography of the studied lavas shows that they are homogeneous. All samples are porphyritic with macrocrysts of clinopyroxene and olivine immersed in a groundmass formed by microcrysts of plagioclase, Fe-Ti oxides and clinopyroxene. Clinopyroxenes are diopsides, olivines have forsterite contents ranging from 74 to 84 % and anorthite in plagioclase varies from 66 to 76% (labradorite). Whole-rock geochemical results evidence that all magmas are basic in composition, ranging from picrobasalts to phonotephrites. Major, trace elements and isotope suppor fractional crystallization as the main process of magma evolution. However, petrography and chemistry of clinopyroxene cores agree with a xenocrystic nature of some of them. We suggest that these clinopyroxene cores crystallized from a genetically related magma and subsequently were entrapped o cannibalized by the basic rising magmas.Sociedad Geológica de España2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/171438Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://sge.usal.es/archivos/geogacetas/geo65/Geo65_09.pdfGeogaceta, 2019, vol. 65, p. 35-38(c) Sociedad Geológica de España, 2019info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1714382026-05-27T06:46:51Z |
| dc.title.none.fl_str_mv |
The Holocene volcanism at El Hierro: insights from petrology and geochemistry |
| title |
The Holocene volcanism at El Hierro: insights from petrology and geochemistry |
| spellingShingle |
The Holocene volcanism at El Hierro: insights from petrology and geochemistry Aulinas Juncà, Meritxell Vulcanisme Petrologia Holocè Hierro (Canàries) Volcanism Petrology Holocene Hierro (Canary Islands) |
| title_short |
The Holocene volcanism at El Hierro: insights from petrology and geochemistry |
| title_full |
The Holocene volcanism at El Hierro: insights from petrology and geochemistry |
| title_fullStr |
The Holocene volcanism at El Hierro: insights from petrology and geochemistry |
| title_full_unstemmed |
The Holocene volcanism at El Hierro: insights from petrology and geochemistry |
| title_sort |
The Holocene volcanism at El Hierro: insights from petrology and geochemistry |
| dc.creator.none.fl_str_mv |
Aulinas Juncà, Meritxell Dominguez, D. Rodriguez-Gonzalez, A. Carmona, H. Fernández Turiel, José Luis Carracedo, Juan C. Arienzo, I. D'Antonio, M. |
| author |
Aulinas Juncà, Meritxell |
| author_facet |
Aulinas Juncà, Meritxell Dominguez, D. Rodriguez-Gonzalez, A. Carmona, H. Fernández Turiel, José Luis Carracedo, Juan C. Arienzo, I. D'Antonio, M. |
| author_role |
author |
| author2 |
Dominguez, D. Rodriguez-Gonzalez, A. Carmona, H. Fernández Turiel, José Luis Carracedo, Juan C. Arienzo, I. D'Antonio, M. |
| author2_role |
author author author author author author author |
| dc.subject.none.fl_str_mv |
Vulcanisme Petrologia Holocè Hierro (Canàries) Volcanism Petrology Holocene Hierro (Canary Islands) |
| topic |
Vulcanisme Petrologia Holocè Hierro (Canàries) Volcanism Petrology Holocene Hierro (Canary Islands) |
| description |
The Holocene volcanism at El Hierro consists of basaltic monogenetic volcanic fields associated with o the three rift systems present in this island. In this work we report preliminary petrological and geochemical data of Holocene lava flows belonging to the WNW-striking rift. Sampling was focused in three zones: Orchilla, Verodal-Sabinosa, and Tanganasoga. Petrography of the studied lavas shows that they are homogeneous. All samples are porphyritic with macrocrysts of clinopyroxene and olivine immersed in a groundmass formed by microcrysts of plagioclase, Fe-Ti oxides and clinopyroxene. Clinopyroxenes are diopsides, olivines have forsterite contents ranging from 74 to 84 % and anorthite in plagioclase varies from 66 to 76% (labradorite). Whole-rock geochemical results evidence that all magmas are basic in composition, ranging from picrobasalts to phonotephrites. Major, trace elements and isotope suppor fractional crystallization as the main process of magma evolution. However, petrography and chemistry of clinopyroxene cores agree with a xenocrystic nature of some of them. We suggest that these clinopyroxene cores crystallized from a genetically related magma and subsequently were entrapped o cannibalized by the basic rising magmas. |
| publishDate |
2019 |
| dc.date.none.fl_str_mv |
2019 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/171438 |
| url |
https://hdl.handle.net/2445/171438 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Reproducció del document publicat a: https://sge.usal.es/archivos/geogacetas/geo65/Geo65_09.pdf Geogaceta, 2019, vol. 65, p. 35-38 |
| dc.rights.none.fl_str_mv |
(c) Sociedad Geológica de España, 2019 info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
(c) Sociedad Geológica de España, 2019 |
| eu_rights_str_mv |
openAccess |
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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 |
Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) reponame:Dipòsit Digital de la UB instname:Universidad de Barcelona |
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Universidad de Barcelona |
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Dipòsit Digital de la UB |
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Dipòsit Digital de la UB |
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15,301629 |