Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon system
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.1/14202 |
Resumo: | We report a study of the magnetic stratigraphy and the anisotropy of isothermal remanent magnetization of Pliocene sediments from International Ocean Discovery Program (IODP) Site U1467 drilled in the Maldives platform (Indian Ocean) during Exp. 359. Magnetic stratigraphy gives a precise record of geomagnetic reversals of the early Pliocene from approximately 5.3 Ma to 3.1 Ma providing a detailed age model in an interval where the biostratigraphic record is scarce. We use the anisotropy of isothermal remanent magnetization (AIRM) to investigate the statistical orientation of fine magnetic particles and provide data on the strength and direction of bottom currents during the early Pliocene. The strength of bottom currents recorded by the AIRM, shows a prominent increase at the top of Chron C3n.1n (about 4.2 Ma), and the current direction (NE - SW) is consistent with that of modern instrumental measurements. Since bottom currents in the Maldives are driven by the monsoon, we speculate that the 4.2 Ma increase of bottom currents could mark the onset of the present-day setting, probably related to the coeval uplift phase of the Himalayan plateau. |
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Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon systemIndian-OceanPolar WanderSusceptibilityOrientationAnisotropyRemanenceCurrentsUpliftFlowWe report a study of the magnetic stratigraphy and the anisotropy of isothermal remanent magnetization of Pliocene sediments from International Ocean Discovery Program (IODP) Site U1467 drilled in the Maldives platform (Indian Ocean) during Exp. 359. Magnetic stratigraphy gives a precise record of geomagnetic reversals of the early Pliocene from approximately 5.3 Ma to 3.1 Ma providing a detailed age model in an interval where the biostratigraphic record is scarce. We use the anisotropy of isothermal remanent magnetization (AIRM) to investigate the statistical orientation of fine magnetic particles and provide data on the strength and direction of bottom currents during the early Pliocene. The strength of bottom currents recorded by the AIRM, shows a prominent increase at the top of Chron C3n.1n (about 4.2 Ma), and the current direction (NE - SW) is consistent with that of modern instrumental measurements. Since bottom currents in the Maldives are driven by the monsoon, we speculate that the 4.2 Ma increase of bottom currents could mark the onset of the present-day setting, probably related to the coeval uplift phase of the Himalayan plateau.IODP-ItaliaUniversity of Urbino (DiSPeA)ElsevierSapientiaLanci, LucaZanella, ElenaJovane, LuigiGaleotti, SimoneAlonso-Garcia, MontserratAlvarez-Zarikian, Carlos A.Bejugam, Nagender NathBetzler, ChristianBialik, Or M.Blattler, Clara L.Eberlik, Gregor P.Guo, Junhua AdamHaffen, SebastienHorozal, SenayInoue, MayuriKroon, DickLaya, Juan CarlosMee, Anna Ling HuiLuedmann, ThomasNakakunir, MasatoshiNiino, KaoruPetruny, Loren M.Pratiwi, Santi D.Reijmer, John J. G.Reolid, JesusSlagle, Angela L.Sloss, Craig R.Su, XiangSwart, Peter K.Wright, James D.Yao, ZhengquanYoung, Jeremy R.2021-11-01T01:30:18Z2019-112019-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/14202eng0031-018210.1016/j.palaeo.2019.109283info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:26:27Zoai:sapientia.ualg.pt:10400.1/14202Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:05:14.946809Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon system |
title |
Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon system |
spellingShingle |
Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon system Lanci, Luca Indian-Ocean Polar Wander Susceptibility Orientation Anisotropy Remanence Currents Uplift Flow |
title_short |
Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon system |
title_full |
Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon system |
title_fullStr |
Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon system |
title_full_unstemmed |
Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon system |
title_sort |
Magnetic properties of early Pliocene sediments from IODP Site U1467 (Maldives platform) reveal changes in the monsoon system |
author |
Lanci, Luca |
author_facet |
Lanci, Luca Zanella, Elena Jovane, Luigi Galeotti, Simone Alonso-Garcia, Montserrat Alvarez-Zarikian, Carlos A. Bejugam, Nagender Nath Betzler, Christian Bialik, Or M. Blattler, Clara L. Eberlik, Gregor P. Guo, Junhua Adam Haffen, Sebastien Horozal, Senay Inoue, Mayuri Kroon, Dick Laya, Juan Carlos Mee, Anna Ling Hui Luedmann, Thomas Nakakunir, Masatoshi Niino, Kaoru Petruny, Loren M. Pratiwi, Santi D. Reijmer, John J. G. Reolid, Jesus Slagle, Angela L. Sloss, Craig R. Su, Xiang Swart, Peter K. Wright, James D. Yao, Zhengquan Young, Jeremy R. |
author_role |
author |
author2 |
Zanella, Elena Jovane, Luigi Galeotti, Simone Alonso-Garcia, Montserrat Alvarez-Zarikian, Carlos A. Bejugam, Nagender Nath Betzler, Christian Bialik, Or M. Blattler, Clara L. Eberlik, Gregor P. Guo, Junhua Adam Haffen, Sebastien Horozal, Senay Inoue, Mayuri Kroon, Dick Laya, Juan Carlos Mee, Anna Ling Hui Luedmann, Thomas Nakakunir, Masatoshi Niino, Kaoru Petruny, Loren M. Pratiwi, Santi D. Reijmer, John J. G. Reolid, Jesus Slagle, Angela L. Sloss, Craig R. Su, Xiang Swart, Peter K. Wright, James D. Yao, Zhengquan Young, Jeremy R. |
author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Lanci, Luca Zanella, Elena Jovane, Luigi Galeotti, Simone Alonso-Garcia, Montserrat Alvarez-Zarikian, Carlos A. Bejugam, Nagender Nath Betzler, Christian Bialik, Or M. Blattler, Clara L. Eberlik, Gregor P. Guo, Junhua Adam Haffen, Sebastien Horozal, Senay Inoue, Mayuri Kroon, Dick Laya, Juan Carlos Mee, Anna Ling Hui Luedmann, Thomas Nakakunir, Masatoshi Niino, Kaoru Petruny, Loren M. Pratiwi, Santi D. Reijmer, John J. G. Reolid, Jesus Slagle, Angela L. Sloss, Craig R. Su, Xiang Swart, Peter K. Wright, James D. Yao, Zhengquan Young, Jeremy R. |
dc.subject.por.fl_str_mv |
Indian-Ocean Polar Wander Susceptibility Orientation Anisotropy Remanence Currents Uplift Flow |
topic |
Indian-Ocean Polar Wander Susceptibility Orientation Anisotropy Remanence Currents Uplift Flow |
description |
We report a study of the magnetic stratigraphy and the anisotropy of isothermal remanent magnetization of Pliocene sediments from International Ocean Discovery Program (IODP) Site U1467 drilled in the Maldives platform (Indian Ocean) during Exp. 359. Magnetic stratigraphy gives a precise record of geomagnetic reversals of the early Pliocene from approximately 5.3 Ma to 3.1 Ma providing a detailed age model in an interval where the biostratigraphic record is scarce. We use the anisotropy of isothermal remanent magnetization (AIRM) to investigate the statistical orientation of fine magnetic particles and provide data on the strength and direction of bottom currents during the early Pliocene. The strength of bottom currents recorded by the AIRM, shows a prominent increase at the top of Chron C3n.1n (about 4.2 Ma), and the current direction (NE - SW) is consistent with that of modern instrumental measurements. Since bottom currents in the Maldives are driven by the monsoon, we speculate that the 4.2 Ma increase of bottom currents could mark the onset of the present-day setting, probably related to the coeval uplift phase of the Himalayan plateau. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-11 2019-11-01T00:00:00Z 2021-11-01T01:30:18Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.1/14202 |
url |
http://hdl.handle.net/10400.1/14202 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0031-0182 10.1016/j.palaeo.2019.109283 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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