Barite crystals facies in the Southern Ocean: towards a better understanding of bio-organo-mineralisation mechanisms
Among the approaches developed this last decade to resolve the issue of the controls on particle transfer efficiency to, and organic carbon remineralisation in the mesopelagic zone, stands the study of particulate biogenic barium (Baxs)- barite (BaSO4) distribution in the water column. This approach...
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ftvliz:oai:oma.vliz.be:217373 2023-05-15T18:25:29+02:00 Barite crystals facies in the Southern Ocean: towards a better understanding of bio-organo-mineralisation mechanisms Jacquet, S. Grauby, O. Baronnet, A. Cardinal, D. Dehairs, F. 2011 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=217373 en eng http://www.vliz.be/nl/open-marien-archief?module=ref&refid=217373 info:eu-repo/semantics/restrictedAccess +biinib+i43suprdsup+international+Lige+colloquium+on+ocean+dynamics+Tracers+of+physical+and+biogeochemical+processes+past+changes+and+ongoing+anthropogenic+impacts+-+May+2-6+2011.i+pp.+1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2011 ftvliz 2022-05-01T09:47:21Z Among the approaches developed this last decade to resolve the issue of the controls on particle transfer efficiency to, and organic carbon remineralisation in the mesopelagic zone, stands the study of particulate biogenic barium (Baxs)- barite (BaSO4) distribution in the water column. This approach relies on the formation of nano- to micro- barite crystals in association with sinking decomposing organic matter, in a world ocean mostly undersaturated for barite, and the release of these crystals after remineralization of the organic matter carrier. The water column distribution of barite in suspended matter reflects production of barite to take place mainly below the surface layer and to be ongoing mainly through the mesopelagic zone. However, the exact mechanism by which barite precipitates is still a matter of debate. Barite crystals in suspended matter collected during the BONUS-GOODHOPE cruise (2008) were examined by scanning electron microscopy and energy dispersive X-ray spectrometry (SEM-EDX). The different facies and compositions of marine barite crystals from surface and mesopelagic depths are compared to investigate whether these carry information on the bio-organo-mineralization mechanisms. These results are compared with Baxs and barite profiles determined by ICP-MS and SEM-EDX analysis, respectively. Article in Journal/Newspaper Southern Ocean Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Southern Ocean |
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Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
Among the approaches developed this last decade to resolve the issue of the controls on particle transfer efficiency to, and organic carbon remineralisation in the mesopelagic zone, stands the study of particulate biogenic barium (Baxs)- barite (BaSO4) distribution in the water column. This approach relies on the formation of nano- to micro- barite crystals in association with sinking decomposing organic matter, in a world ocean mostly undersaturated for barite, and the release of these crystals after remineralization of the organic matter carrier. The water column distribution of barite in suspended matter reflects production of barite to take place mainly below the surface layer and to be ongoing mainly through the mesopelagic zone. However, the exact mechanism by which barite precipitates is still a matter of debate. Barite crystals in suspended matter collected during the BONUS-GOODHOPE cruise (2008) were examined by scanning electron microscopy and energy dispersive X-ray spectrometry (SEM-EDX). The different facies and compositions of marine barite crystals from surface and mesopelagic depths are compared to investigate whether these carry information on the bio-organo-mineralization mechanisms. These results are compared with Baxs and barite profiles determined by ICP-MS and SEM-EDX analysis, respectively. |
format |
Article in Journal/Newspaper |
author |
Jacquet, S. Grauby, O. Baronnet, A. Cardinal, D. Dehairs, F. |
spellingShingle |
Jacquet, S. Grauby, O. Baronnet, A. Cardinal, D. Dehairs, F. Barite crystals facies in the Southern Ocean: towards a better understanding of bio-organo-mineralisation mechanisms |
author_facet |
Jacquet, S. Grauby, O. Baronnet, A. Cardinal, D. Dehairs, F. |
author_sort |
Jacquet, S. |
title |
Barite crystals facies in the Southern Ocean: towards a better understanding of bio-organo-mineralisation mechanisms |
title_short |
Barite crystals facies in the Southern Ocean: towards a better understanding of bio-organo-mineralisation mechanisms |
title_full |
Barite crystals facies in the Southern Ocean: towards a better understanding of bio-organo-mineralisation mechanisms |
title_fullStr |
Barite crystals facies in the Southern Ocean: towards a better understanding of bio-organo-mineralisation mechanisms |
title_full_unstemmed |
Barite crystals facies in the Southern Ocean: towards a better understanding of bio-organo-mineralisation mechanisms |
title_sort |
barite crystals facies in the southern ocean: towards a better understanding of bio-organo-mineralisation mechanisms |
publishDate |
2011 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=217373 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
+biinib+i43suprdsup+international+Lige+colloquium+on+ocean+dynamics+Tracers+of+physical+and+biogeochemical+processes+past+changes+and+ongoing+anthropogenic+impacts+-+May+2-6+2011.i+pp.+1 |
op_relation |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=217373 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766206970503626752 |