Contrasted hydrothermal activity along the South-East Indian Ridge (130°E-140°E): From crustal to ultramafic circulation
Using a combined approach of seafloor mapping, MAPR and CTD survey, we report evidence for active hydrothermal venting along the 130°-140°E section of the poorly-known South-East Indian Ridge (SEIR) from the Australia-Antarctic Discordance (AAD) to the George V Fracture Zone (FZ). Along the latter,...
Published in: | Geochemistry, Geophysics, Geosystems |
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Amer Geophysical Union
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Online Access: | https://archimer.ifremer.fr/doc/00387/49821/50400.pdf https://archimer.ifremer.fr/doc/00387/49821/50401.pdf https://doi.org/10.1002/2016GC006683 https://archimer.ifremer.fr/doc/00387/49821/ |
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ftarchimer:oai:archimer.ifremer.fr:49821 2023-05-15T13:50:50+02:00 Contrasted hydrothermal activity along the South-East Indian Ridge (130°E-140°E): From crustal to ultramafic circulation Boulart, Cedric Briais, Anne Chavagnac, Valerie Revillon, Sidonie Ceuleneer, Georges Donval, Jean-pierre Guyader, Vivien Barrere, Fabienne Ferreira, Nicolas Hanan, Barry Hemond, Christophe Macleod, Sarah Maia, Marcia Maillard, Agnes Merkuryev, Sergey Park, Sung-hyun Ruellan, Etienne Schohn, Alexandre Watson, Sally Yang, Yun-seok 2017-07 application/pdf https://archimer.ifremer.fr/doc/00387/49821/50400.pdf https://archimer.ifremer.fr/doc/00387/49821/50401.pdf https://doi.org/10.1002/2016GC006683 https://archimer.ifremer.fr/doc/00387/49821/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00387/49821/50400.pdf https://archimer.ifremer.fr/doc/00387/49821/50401.pdf doi:10.1002/2016GC006683 https://archimer.ifremer.fr/doc/00387/49821/ 2017. American Geophysical Union. All Rights Reserved. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. info:eu-repo/semantics/openAccess restricted use CC-BY-NC-ND Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2017-07 , Vol. 18 , N. 7 , P. 2446-2458 hydrothermal plumes mid-ocean ridges South-East Indian Ridge text Publication info:eu-repo/semantics/article 2017 ftarchimer https://doi.org/10.1002/2016GC006683 2021-09-23T20:29:35Z Using a combined approach of seafloor mapping, MAPR and CTD survey, we report evidence for active hydrothermal venting along the 130°-140°E section of the poorly-known South-East Indian Ridge (SEIR) from the Australia-Antarctic Discordance (AAD) to the George V Fracture Zone (FZ). Along the latter, we report Eh and CH4 anomalies in the water column above a serpentinite massif, which unambiguously testify for ultramafic-related fluid flow. This is the first time that such circulation is observed on an intermediate-spreading ridge. The ridge axis itself is characterized by numerous off-axis volcanoes, suggesting a high magma supply. The water column survey indicates the presence of at least ten distinct hydrothermal plumes along the axis. The CH4:Mn ratios of the plumes vary from 0.37 to 0.65 denoting different underlying processes, from typical basalt-hosted to ultramafic-hosted high-temperature hydrothermal circulation. Our data suggest that the change of mantle temperature along the SEIR not only regulates the magma supply, but also the hydrothermal activity. The distribution of hydrothermal plumes from a ridge segment to another implies secondary controls such as the presence of fractures and faults along the axis or in the axial discontinuities. We conclude from these results that hydrothermal activity along the SEIR is controlled by magmatic processes at the regional scale and by the tectonics at the segment scale, which influences the type of hydrothermal circulation and leads to various chemical compositions. Such variety may impact global biogeochemical cycles, especially in the Southern Ocean where hydrothermal venting might be the only source of nutrients. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic George V Fracture Zone ENVELOPE(141.000,141.000,-53.500,-53.500) Indian Southern Ocean Geochemistry, Geophysics, Geosystems 18 7 2446 2458 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
hydrothermal plumes mid-ocean ridges South-East Indian Ridge |
spellingShingle |
hydrothermal plumes mid-ocean ridges South-East Indian Ridge Boulart, Cedric Briais, Anne Chavagnac, Valerie Revillon, Sidonie Ceuleneer, Georges Donval, Jean-pierre Guyader, Vivien Barrere, Fabienne Ferreira, Nicolas Hanan, Barry Hemond, Christophe Macleod, Sarah Maia, Marcia Maillard, Agnes Merkuryev, Sergey Park, Sung-hyun Ruellan, Etienne Schohn, Alexandre Watson, Sally Yang, Yun-seok Contrasted hydrothermal activity along the South-East Indian Ridge (130°E-140°E): From crustal to ultramafic circulation |
topic_facet |
hydrothermal plumes mid-ocean ridges South-East Indian Ridge |
description |
Using a combined approach of seafloor mapping, MAPR and CTD survey, we report evidence for active hydrothermal venting along the 130°-140°E section of the poorly-known South-East Indian Ridge (SEIR) from the Australia-Antarctic Discordance (AAD) to the George V Fracture Zone (FZ). Along the latter, we report Eh and CH4 anomalies in the water column above a serpentinite massif, which unambiguously testify for ultramafic-related fluid flow. This is the first time that such circulation is observed on an intermediate-spreading ridge. The ridge axis itself is characterized by numerous off-axis volcanoes, suggesting a high magma supply. The water column survey indicates the presence of at least ten distinct hydrothermal plumes along the axis. The CH4:Mn ratios of the plumes vary from 0.37 to 0.65 denoting different underlying processes, from typical basalt-hosted to ultramafic-hosted high-temperature hydrothermal circulation. Our data suggest that the change of mantle temperature along the SEIR not only regulates the magma supply, but also the hydrothermal activity. The distribution of hydrothermal plumes from a ridge segment to another implies secondary controls such as the presence of fractures and faults along the axis or in the axial discontinuities. We conclude from these results that hydrothermal activity along the SEIR is controlled by magmatic processes at the regional scale and by the tectonics at the segment scale, which influences the type of hydrothermal circulation and leads to various chemical compositions. Such variety may impact global biogeochemical cycles, especially in the Southern Ocean where hydrothermal venting might be the only source of nutrients. |
format |
Article in Journal/Newspaper |
author |
Boulart, Cedric Briais, Anne Chavagnac, Valerie Revillon, Sidonie Ceuleneer, Georges Donval, Jean-pierre Guyader, Vivien Barrere, Fabienne Ferreira, Nicolas Hanan, Barry Hemond, Christophe Macleod, Sarah Maia, Marcia Maillard, Agnes Merkuryev, Sergey Park, Sung-hyun Ruellan, Etienne Schohn, Alexandre Watson, Sally Yang, Yun-seok |
author_facet |
Boulart, Cedric Briais, Anne Chavagnac, Valerie Revillon, Sidonie Ceuleneer, Georges Donval, Jean-pierre Guyader, Vivien Barrere, Fabienne Ferreira, Nicolas Hanan, Barry Hemond, Christophe Macleod, Sarah Maia, Marcia Maillard, Agnes Merkuryev, Sergey Park, Sung-hyun Ruellan, Etienne Schohn, Alexandre Watson, Sally Yang, Yun-seok |
author_sort |
Boulart, Cedric |
title |
Contrasted hydrothermal activity along the South-East Indian Ridge (130°E-140°E): From crustal to ultramafic circulation |
title_short |
Contrasted hydrothermal activity along the South-East Indian Ridge (130°E-140°E): From crustal to ultramafic circulation |
title_full |
Contrasted hydrothermal activity along the South-East Indian Ridge (130°E-140°E): From crustal to ultramafic circulation |
title_fullStr |
Contrasted hydrothermal activity along the South-East Indian Ridge (130°E-140°E): From crustal to ultramafic circulation |
title_full_unstemmed |
Contrasted hydrothermal activity along the South-East Indian Ridge (130°E-140°E): From crustal to ultramafic circulation |
title_sort |
contrasted hydrothermal activity along the south-east indian ridge (130°e-140°e): from crustal to ultramafic circulation |
publisher |
Amer Geophysical Union |
publishDate |
2017 |
url |
https://archimer.ifremer.fr/doc/00387/49821/50400.pdf https://archimer.ifremer.fr/doc/00387/49821/50401.pdf https://doi.org/10.1002/2016GC006683 https://archimer.ifremer.fr/doc/00387/49821/ |
long_lat |
ENVELOPE(141.000,141.000,-53.500,-53.500) |
geographic |
Antarctic George V Fracture Zone Indian Southern Ocean |
geographic_facet |
Antarctic George V Fracture Zone Indian Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2017-07 , Vol. 18 , N. 7 , P. 2446-2458 |
op_relation |
https://archimer.ifremer.fr/doc/00387/49821/50400.pdf https://archimer.ifremer.fr/doc/00387/49821/50401.pdf doi:10.1002/2016GC006683 https://archimer.ifremer.fr/doc/00387/49821/ |
op_rights |
2017. American Geophysical Union. All Rights Reserved. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1002/2016GC006683 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
18 |
container_issue |
7 |
container_start_page |
2446 |
op_container_end_page |
2458 |
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1766254160851763200 |