{"_buckets": {"deposit": "69148143-4d5b-49da-b257-4fd568d0ec8d"}, "_deposit": {"id": "4039", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "4039"}, "status": "published"}, "_oai": {"id": "oai:nied-repo.bosai.go.jp:00004039", "sets": []}, "author_link": [], "item_10001_biblio_info_7": {"attribute_name": "書誌情報", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2017-08"}, "bibliographicIssueNumber": "8", "bibliographicPageEnd": "3164", "bibliographicPageStart": "3138", "bibliographicVolumeNumber": "18", "bibliographic_titles": [{"bibliographic_title": "GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS", "bibliographic_titleLang": "en"}]}]}, "item_10001_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_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 0.780.05 and 1.610.09 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.\nPlain Language Summary Submarine volcanism and associated hydrothermal systems are relevant processes for the evolution of the ocean basins, due their impact on the geochemistry of the oceans, their potential to form significant ore deposits, and their implications for global climate change, considering the heat transport, maturation of organic matter and the release of carbon-rich fluids associated to these systems. Hydrothermal vent complexes have been found all over the world in the fossil record related to large igneous provinces as those found in the North Atlantic margins. Nevertheless, studies focused on modern deep water magmatic hydrothermal systems are generally confined to ocean spreading centers, while scarce works address their study in deep oceanic intraplate basins. This study reports and documents for the first time the discovery of a recent deep water system of magmatic-induced hydrothermal vents at 4800-5200 m depth in an unexplored area of the Canary Basin (eastern central Atlantic), located about 500 km west of the Canary Islands. The analysis and interpretation of the newly acquired data set has shown that the study area is characterized by the presence of a huge magmatic complex of sills that intrudes the sedimentary sequence and exceptionally deep volcanoes so far unknown.", "subitem_description_language": "en", "subitem_description_type": "Other"}]}, "item_10001_publisher_8": {"attribute_name": "出版者", "attribute_value_mlt": [{"subitem_publisher": "AMER GEOPHYSICAL UNION", "subitem_publisher_language": "en"}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "10.1002/2017GC006889"}}]}, "item_10001_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "1525-2027", "subitem_source_identifier_type": "ISSN"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "T. Medialdea", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "L. Somoza", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "F. J. Gonzalez", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "J. T. Vazquez", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "C. de Ignacio", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "H. Sumino", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "O. Sanchez-Guillamon", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Y. Orihashi", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "R. Leon", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "D. Palomino", "creatorNameLang": "en"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_title": "Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean)", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean)", "subitem_title_language": "en"}]}, "item_type_id": "40001", "owner": "1", "path": ["1670839190650"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/4039", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "4039", "relation": {}, "relation_version_is_last": true, "title": ["Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean)"], "weko_shared_id": -1}