Asian monsoon modulation of nonsteady state diagenesis in hemipelagic marine sediments offshore of Japan
We have identifiedmillennial-scale variations inmagneticmineral diagenesis from Pacific Ocean sediments offshore of Japan that we correlate with changes in organic carbon burial that were likely driven by Asian monsoon fluctuations. The correlation was determined by identifying offsets between the p...
Main Authors: | , , , , , , , , , , , |
---|---|
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2016
|
Subjects: | |
Online Access: | https://dspace.library.uu.nl/handle/1874/343166 |
id |
ftunivutrecht:oai:dspace.library.uu.nl:1874/343166 |
---|---|
record_format |
openpolar |
spelling |
ftunivutrecht:oai:dspace.library.uu.nl:1874/343166 2023-07-23T04:20:43+02:00 Asian monsoon modulation of nonsteady state diagenesis in hemipelagic marine sediments offshore of Japan Chang, Liao Bolton, C.T. Dekkers, M.J. Hayashida, A. Heslop, David Krijgsman, W. Kodama, K. Paterson, Greig Roberts, Andrew P. Rohling, E.J. Yamamoto, Y. Zhao, X. Paleomagnetism 2016-11 image/pdf https://dspace.library.uu.nl/handle/1874/343166 en eng 1525-2027 https://dspace.library.uu.nl/handle/1874/343166 info:eu-repo/semantics/OpenAccess Article 2016 ftunivutrecht 2023-07-02T01:55:33Z We have identifiedmillennial-scale variations inmagneticmineral diagenesis from Pacific Ocean sediments offshore of Japan that we correlate with changes in organic carbon burial that were likely driven by Asian monsoon fluctuations. The correlation was determined by identifying offsets between the positions of fossil diagenetic fronts and climatically induced variations in organic carbon burial inferred frommagnetic and geochemical analyses. Episodes of intense monsoon activity and attendant sedimentmagneticmineral diagenesis also appear to correlate with Heinrich events, which supports the existence of climatic telecommunications between Asia and the North Atlantic region. Several lines of evidence support our conclusions: (1) fluctuations in down-coremagnetic properties and diagenetic pyrite precipitation are approximately coeval; (2) localized stratigraphic intervals with relatively strongermagneticmineral dissolution are linked to enhanced sedimentary organic carbon contents that gave rise to nonsteady state diagenesis; (3) down-core variations in elemental S content provide a proxy for nonsteady state diagenesis that correlate with key records of Asianmonsoon variations; and (4) relict titanomagnetite that is preserved as inclusions within silicate particles, rather than secondary authigenic phases (e.g., greigite), dominates the strongly diagenetically altered sediment intervals and are protected against sulfidic dissolution.We suggest that such millennial-scale environmentalmodulation of nonsteady state diagenesis (that creates a temporal diagenetic filter and relict magneticmineral signatures) is likely to be common in organic-rich hemipelagic sedimentary settingswith rapidly varying depositional conditions. Ourwork also demonstrates the usefulness of magnetic mineral inclusions for recording important environmentalmagnetic signals. Article in Journal/Newspaper North Atlantic Utrecht University Repository Pacific |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
description |
We have identifiedmillennial-scale variations inmagneticmineral diagenesis from Pacific Ocean sediments offshore of Japan that we correlate with changes in organic carbon burial that were likely driven by Asian monsoon fluctuations. The correlation was determined by identifying offsets between the positions of fossil diagenetic fronts and climatically induced variations in organic carbon burial inferred frommagnetic and geochemical analyses. Episodes of intense monsoon activity and attendant sedimentmagneticmineral diagenesis also appear to correlate with Heinrich events, which supports the existence of climatic telecommunications between Asia and the North Atlantic region. Several lines of evidence support our conclusions: (1) fluctuations in down-coremagnetic properties and diagenetic pyrite precipitation are approximately coeval; (2) localized stratigraphic intervals with relatively strongermagneticmineral dissolution are linked to enhanced sedimentary organic carbon contents that gave rise to nonsteady state diagenesis; (3) down-core variations in elemental S content provide a proxy for nonsteady state diagenesis that correlate with key records of Asianmonsoon variations; and (4) relict titanomagnetite that is preserved as inclusions within silicate particles, rather than secondary authigenic phases (e.g., greigite), dominates the strongly diagenetically altered sediment intervals and are protected against sulfidic dissolution.We suggest that such millennial-scale environmentalmodulation of nonsteady state diagenesis (that creates a temporal diagenetic filter and relict magneticmineral signatures) is likely to be common in organic-rich hemipelagic sedimentary settingswith rapidly varying depositional conditions. Ourwork also demonstrates the usefulness of magnetic mineral inclusions for recording important environmentalmagnetic signals. |
author2 |
Paleomagnetism |
format |
Article in Journal/Newspaper |
author |
Chang, Liao Bolton, C.T. Dekkers, M.J. Hayashida, A. Heslop, David Krijgsman, W. Kodama, K. Paterson, Greig Roberts, Andrew P. Rohling, E.J. Yamamoto, Y. Zhao, X. |
spellingShingle |
Chang, Liao Bolton, C.T. Dekkers, M.J. Hayashida, A. Heslop, David Krijgsman, W. Kodama, K. Paterson, Greig Roberts, Andrew P. Rohling, E.J. Yamamoto, Y. Zhao, X. Asian monsoon modulation of nonsteady state diagenesis in hemipelagic marine sediments offshore of Japan |
author_facet |
Chang, Liao Bolton, C.T. Dekkers, M.J. Hayashida, A. Heslop, David Krijgsman, W. Kodama, K. Paterson, Greig Roberts, Andrew P. Rohling, E.J. Yamamoto, Y. Zhao, X. |
author_sort |
Chang, Liao |
title |
Asian monsoon modulation of nonsteady state diagenesis in hemipelagic marine sediments offshore of Japan |
title_short |
Asian monsoon modulation of nonsteady state diagenesis in hemipelagic marine sediments offshore of Japan |
title_full |
Asian monsoon modulation of nonsteady state diagenesis in hemipelagic marine sediments offshore of Japan |
title_fullStr |
Asian monsoon modulation of nonsteady state diagenesis in hemipelagic marine sediments offshore of Japan |
title_full_unstemmed |
Asian monsoon modulation of nonsteady state diagenesis in hemipelagic marine sediments offshore of Japan |
title_sort |
asian monsoon modulation of nonsteady state diagenesis in hemipelagic marine sediments offshore of japan |
publishDate |
2016 |
url |
https://dspace.library.uu.nl/handle/1874/343166 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
1525-2027 https://dspace.library.uu.nl/handle/1874/343166 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772185381372952576 |