Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563
Abstract By studying deep‐sea drilled records from the North Atlantic Ocean, several magnetic instabilities of short duration, such as the Iceland Basin (188 ka), the Björn (1,255 ka) and the Gardar (1,460 ka) excursions, were discovered. These records have contributed to our understanding of Earth&...
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2025-06-01
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| Series: | Geochemistry, Geophysics, Geosystems |
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| Online Access: | https://doi.org/10.1029/2025GC012220 |
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| author | Anita Di Chiara Sara Satolli Sarah A. Friedman Deepa Dwyer Gary D. Acton Tom Dunkley Jones Boris Theofanis Karatsolis Paul N. Pearson Takuma Suzuki Sevasti Modestou Suzanne O'Connell Halima Ibrahim Claire E. Jasper Danielle E. LeBlanc Saran Lee‐Takeda Thena Thulasi Deborah E. Eason Matthias Sinnesael Katharina Hochmuth Anne Briais Ross Parnell‐Turner Leah J. LeVay Expedition 395C/395 Science Party |
| author_facet | Anita Di Chiara Sara Satolli Sarah A. Friedman Deepa Dwyer Gary D. Acton Tom Dunkley Jones Boris Theofanis Karatsolis Paul N. Pearson Takuma Suzuki Sevasti Modestou Suzanne O'Connell Halima Ibrahim Claire E. Jasper Danielle E. LeBlanc Saran Lee‐Takeda Thena Thulasi Deborah E. Eason Matthias Sinnesael Katharina Hochmuth Anne Briais Ross Parnell‐Turner Leah J. LeVay Expedition 395C/395 Science Party |
| author_sort | Anita Di Chiara |
| collection | DOAJ |
| description | Abstract By studying deep‐sea drilled records from the North Atlantic Ocean, several magnetic instabilities of short duration, such as the Iceland Basin (188 ka), the Björn (1,255 ka) and the Gardar (1,460 ka) excursions, were discovered. These records have contributed to our understanding of Earth's magnetic field and are the foundation of the Geomagnetic Instability Time Scale (GITS) in the Quaternary. Here, we present the magnetostratigraphy from Sites U1555 (0 to ∼2.7 Ma) and U1563 (0 to ∼5.2 Ma) drilled during the International Ocean Discovery Program Expedition 395C on the eastern side of the modern Mid‐Atlantic Ridge (∼60°N, 20–30°W). Shipboard paleomagnetic and microfossil data provided a preliminary age model, extending the regional record to 3.4 Ma. The Virtual Geomagnetic Pole latitudes from archive halves, corroborated with data from discrete samples, were used to build a high‐resolution magnetostratigraphy, which contained the expected Brunhes and Matuyama Chrons and their respective Subchrons. We also identified most of the magnetic events reported in the GITS, including the less well‐documented ones, such as Osaka, Kamitzukara, Huckleberry Ridge, Reunion, Gardar, Halawa and L4 events. The high‐resolution magnetostratigraphy from Sites U1555 and U1563 is compared with two previous legacy sites and contributes toward an increasingly robust GITS, expanding its use as a correlation and dating tool. |
| format | Article |
| id | doaj-art-a0c53aa4d2974143b2f87a07e9b859fe |
| institution | Kabale University |
| issn | 1525-2027 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Wiley |
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| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj-art-a0c53aa4d2974143b2f87a07e9b859fe2025-08-20T03:30:36ZengWileyGeochemistry, Geophysics, Geosystems1525-20272025-06-01266n/an/a10.1029/2025GC012220Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563Anita Di Chiara0Sara Satolli1Sarah A. Friedman2Deepa Dwyer3Gary D. Acton4Tom Dunkley Jones5Boris Theofanis Karatsolis6Paul N. Pearson7Takuma Suzuki8Sevasti Modestou9Suzanne O'Connell10Halima Ibrahim11Claire E. Jasper12Danielle E. LeBlanc13Saran Lee‐Takeda14Thena Thulasi15Deborah E. Eason16Matthias Sinnesael17Katharina Hochmuth18Anne Briais19Ross Parnell‐Turner20Leah J. LeVay21Expedition 395C/395 Science PartyIstituto Nazionale di Geofisica e Vulcanologia, Roma Roma ItalyDepartment of Engineering and Geology University of Chieti‐Pescara Chieti ItalySchool of Earth Environment & Sustainability Georgia Southern University Statesboro GA USACollege of Earth Ocean and Atmospheric Sciences Oregon State University Corvallis OR USAInternational Ocean Discovery Program Texas A&M University College Station TX USASchool of Geography, Earth and Environmental Sciences, University of Birmingham Birmingham UKArchaeology, Environmental changes & Geo‐Chemistry, Vrije Universiteit Brussel Brussels BelgiumDepartment of Earth Sciences University College London London UKMarine Core Research Institute Kochi University Nankoku Kochi JapanDepartment of Geography and Environmental Sciences Northumbria University Newcastle upon Tyne UKDepartment of Earth and Environmental Sciences Wesleyan University Middletown CT USADepartment of Earth Sciences Binghamton University Binghamton NY USALamont‐Doherty Earth Observatory Columbia University Palisades NY USADepartment of Earth and Environmental Sciences Boston College Chestnut Hill MA USADepartment of Natural Environmental Studies Atmosphere and Ocean Research Institute The University of Tokyo Tokyo JapanGeosciences Division National Centre for Polar and Ocean Research (NCPOR) Vasco‐da‐Gama IndiaDepartment of Earth Sciences School of Ocean & Earth Science & Technology University of Hawai'i at Mānoa Honolulu HI USAGeology, School of Natural Sciences, Trinity College Dublin, The University of Dublin Dublin IrelandInstitute for Marine and Antarctic Studies (IMAS), College of Science and Engineering, University of Tasmania Hobart TAS AustraliaGeo‐Ocean, Centre National de la Recherche Scientifique (CNRS), Institut Universitaire Européen de la Mer, Rue Dumont d’Urville Plouzané FranceInstitute of Geophysics & Planetary Physics Scripps Institution of Oceanography University of California, San Diego La Jolla CA USAInternational Ocean Discovery Program Texas A&M University College Station TX USAAbstract By studying deep‐sea drilled records from the North Atlantic Ocean, several magnetic instabilities of short duration, such as the Iceland Basin (188 ka), the Björn (1,255 ka) and the Gardar (1,460 ka) excursions, were discovered. These records have contributed to our understanding of Earth's magnetic field and are the foundation of the Geomagnetic Instability Time Scale (GITS) in the Quaternary. Here, we present the magnetostratigraphy from Sites U1555 (0 to ∼2.7 Ma) and U1563 (0 to ∼5.2 Ma) drilled during the International Ocean Discovery Program Expedition 395C on the eastern side of the modern Mid‐Atlantic Ridge (∼60°N, 20–30°W). Shipboard paleomagnetic and microfossil data provided a preliminary age model, extending the regional record to 3.4 Ma. The Virtual Geomagnetic Pole latitudes from archive halves, corroborated with data from discrete samples, were used to build a high‐resolution magnetostratigraphy, which contained the expected Brunhes and Matuyama Chrons and their respective Subchrons. We also identified most of the magnetic events reported in the GITS, including the less well‐documented ones, such as Osaka, Kamitzukara, Huckleberry Ridge, Reunion, Gardar, Halawa and L4 events. The high‐resolution magnetostratigraphy from Sites U1555 and U1563 is compared with two previous legacy sites and contributes toward an increasingly robust GITS, expanding its use as a correlation and dating tool.https://doi.org/10.1029/2025GC012220BruhnesMatuyamamagnetostratigraphyexcursionspaleomagnetismmagnetic instabilities |
| spellingShingle | Anita Di Chiara Sara Satolli Sarah A. Friedman Deepa Dwyer Gary D. Acton Tom Dunkley Jones Boris Theofanis Karatsolis Paul N. Pearson Takuma Suzuki Sevasti Modestou Suzanne O'Connell Halima Ibrahim Claire E. Jasper Danielle E. LeBlanc Saran Lee‐Takeda Thena Thulasi Deborah E. Eason Matthias Sinnesael Katharina Hochmuth Anne Briais Ross Parnell‐Turner Leah J. LeVay Expedition 395C/395 Science Party Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563 Geochemistry, Geophysics, Geosystems Bruhnes Matuyama magnetostratigraphy excursions paleomagnetism magnetic instabilities |
| title | Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563 |
| title_full | Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563 |
| title_fullStr | Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563 |
| title_full_unstemmed | Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563 |
| title_short | Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563 |
| title_sort | geomagnetic excursions recorded in north atlantic iodp expedition 395c sites u1555 and u1563 |
| topic | Bruhnes Matuyama magnetostratigraphy excursions paleomagnetism magnetic instabilities |
| url | https://doi.org/10.1029/2025GC012220 |
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