Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean)
New seismic profiles, bathymetric data, and sediment‐rock sampling document for the first time the discovery of hydrothermal vent complexes and volcanic cones at 4800–5200 m depth related to recent volcanic and intrusive activity in an unexplored area of the Canary Basin (Eastern Atlantic Ocean, 500...
| Autores: | , , , , , , , , , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 2017 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/277156 |
| Acesso em linha: | http://hdl.handle.net/10261/277156 https://doi.org/10.1002/2017GC006889 |
| Access Level: | acceso abierto |
| Palavra-chave: | volcanoes sills hydrothermal vents oceanic hotspots deep oceanic basins Atlantic Ocean Canary Basin |
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Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean)Medialdea Cela, TeresaSomoza, LuisGonzález Sanz, Francisco JavierVázquez, Juan TomásIgnacio, Cristina deSumino, HirochikaSánchez-Guillamón, OlgaOrihashi, YujiLeón Buendía, Ricardo F.Palomino, Desiréevolcanoessillshydrothermal ventsoceanic hotspotsdeep oceanic basinsAtlantic OceanCanary BasinNew seismic profiles, bathymetric data, and sediment‐rock sampling document for the first time the discovery of hydrothermal vent complexes and volcanic cones at 4800–5200 m depth related to recent volcanic and intrusive activity in an unexplored area of the Canary Basin (Eastern Atlantic Ocean, 500 km west of the Canary Islands). A complex of sill intrusions is imaged on seismic profiles showing saucer‐shaped, parallel, or inclined geometries. Three main types of structures are related to these intrusions. Type I consists of cone‐shaped depressions developed above inclined sills interpreted as hydrothermal vents. Type II is the most abundant and is represented by isolated or clustered hydrothermal domes bounded by faults rooted at the tips of saucer‐shaped sills. Domes are interpreted as seabed expressions of reservoirs of CH4 and CO2‐rich fluids formed by degassing and contact metamorphism of organic‐rich sediments around sill intrusions. Type III are hydrothermal‐volcanic complexes originated above stratified or branched inclined sills connected by a chimney to the seabed volcanic edifice. Parallel sills sourced from the magmatic chimney formed also domes surrounding the volcanic cones. Core and dredges revealed that these volcanoes, which must be among the deepest in the world, are constituted by OIB‐type, basanites with an outer ring of blue‐green hydrothermal Al‐rich smectite muds. Magmatic activity is dated, based on lava samples, at 0.78 ± 0.05 and 1.61 ± 0.09 Ma (K/Ar methods) and on tephra layers within cores at 25–237 ky. The Subvent hydrothermal‐volcanic complex constitutes the first modern system reported in deep water oceanic basins related to intraplate hotspot activity.Instituto Geológico y Minero de España, EspañaInstituto Español de Oceanografía, EspañaDepartamento de Petrología y Geoquímica, Universidad Complutense de Madrid, EspañaDepartment of Basic Science, University of Tokyo, JapónEarthquake Research Institute, University of Tokyo, JapónJohn Wiley & Sons202220222017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/277156https://doi.org/10.1002/2017GC006889reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#CGL2012–39524- C02CTM2010– 09496-ECTM2016–75947-Rhttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017GC006889info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2771562026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean) |
| title |
Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean) |
| spellingShingle |
Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean) Medialdea Cela, Teresa volcanoes sills hydrothermal vents oceanic hotspots deep oceanic basins Atlantic Ocean Canary Basin |
| title_short |
Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean) |
| title_full |
Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean) |
| title_fullStr |
Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean) |
| title_full_unstemmed |
Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean) |
| title_sort |
Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean) |
| dc.creator.none.fl_str_mv |
Medialdea Cela, Teresa Somoza, Luis González Sanz, Francisco Javier Vázquez, Juan Tomás Ignacio, Cristina de Sumino, Hirochika Sánchez-Guillamón, Olga Orihashi, Yuji León Buendía, Ricardo F. Palomino, Desirée |
| author |
Medialdea Cela, Teresa |
| author_facet |
Medialdea Cela, Teresa Somoza, Luis González Sanz, Francisco Javier Vázquez, Juan Tomás Ignacio, Cristina de Sumino, Hirochika Sánchez-Guillamón, Olga Orihashi, Yuji León Buendía, Ricardo F. Palomino, Desirée |
| author_role |
author |
| author2 |
Somoza, Luis González Sanz, Francisco Javier Vázquez, Juan Tomás Ignacio, Cristina de Sumino, Hirochika Sánchez-Guillamón, Olga Orihashi, Yuji León Buendía, Ricardo F. Palomino, Desirée |
| author2_role |
author author author author author author author author author |
| dc.subject.none.fl_str_mv |
volcanoes sills hydrothermal vents oceanic hotspots deep oceanic basins Atlantic Ocean Canary Basin |
| topic |
volcanoes sills hydrothermal vents oceanic hotspots deep oceanic basins Atlantic Ocean Canary Basin |
| description |
New seismic profiles, bathymetric data, and sediment‐rock sampling document for the first time the discovery of hydrothermal vent complexes and volcanic cones at 4800–5200 m depth related to recent volcanic and intrusive activity in an unexplored area of the Canary Basin (Eastern Atlantic Ocean, 500 km west of the Canary Islands). A complex of sill intrusions is imaged on seismic profiles showing saucer‐shaped, parallel, or inclined geometries. Three main types of structures are related to these intrusions. Type I consists of cone‐shaped depressions developed above inclined sills interpreted as hydrothermal vents. Type II is the most abundant and is represented by isolated or clustered hydrothermal domes bounded by faults rooted at the tips of saucer‐shaped sills. Domes are interpreted as seabed expressions of reservoirs of CH4 and CO2‐rich fluids formed by degassing and contact metamorphism of organic‐rich sediments around sill intrusions. Type III are hydrothermal‐volcanic complexes originated above stratified or branched inclined sills connected by a chimney to the seabed volcanic edifice. Parallel sills sourced from the magmatic chimney formed also domes surrounding the volcanic cones. Core and dredges revealed that these volcanoes, which must be among the deepest in the world, are constituted by OIB‐type, basanites with an outer ring of blue‐green hydrothermal Al‐rich smectite muds. Magmatic activity is dated, based on lava samples, at 0.78 ± 0.05 and 1.61 ± 0.09 Ma (K/Ar methods) and on tephra layers within cores at 25–237 ky. The Subvent hydrothermal‐volcanic complex constitutes the first modern system reported in deep water oceanic basins related to intraplate hotspot activity. |
| publishDate |
2017 |
| dc.date.none.fl_str_mv |
2017 2022 2022 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 |
| format |
article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/277156 https://doi.org/10.1002/2017GC006889 |
| url |
http://hdl.handle.net/10261/277156 https://doi.org/10.1002/2017GC006889 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# CGL2012–39524- C02 CTM2010– 09496-E CTM2016–75947-R https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017GC006889 |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.publisher.none.fl_str_mv |
John Wiley & Sons |
| publisher.none.fl_str_mv |
John Wiley & Sons |
| dc.source.none.fl_str_mv |
reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
| instname_str |
Consejo Superior de Investigaciones Científicas (CSIC) |
| reponame_str |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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1869417668128276480 |
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15.811543 |