Geochemistry and dissolved organic matter in marine shallow hydrothermal systems
Shallow submarine hydrothermal systems are extreme environments with strong redox gradients at the interface of hot, reduced fluids and cold, oxygenated seawater. Hydrothermal fluids are often depleted in sulfate when compared to surrounding seawater and can contain high concentrations of hydrogen s...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.874298 2023-05-15T16:49:38+02:00 Geochemistry and dissolved organic matter in marine shallow hydrothermal systems Gomez-Saez, Gonzalo V Niggemann, Jutta Dittmar, Thorsten Pohlabeln, Anika M Lang, Susan Q Noowong, Ann Pichler, Thomas Wörmer, Lars Bühring, Solveig I MEDIAN LATITUDE: 34.043250 * MEDIAN LONGITUDE: -27.960852 * SOUTH-BOUND LATITUDE: 13.854000 * WEST-BOUND LONGITUDE: -61.363000 * NORTH-BOUND LATITUDE: 65.930511 * EAST-BOUND LONGITUDE: 24.522500 * DATE/TIME START: 2012-05-01T00:00:00 * DATE/TIME END: 2013-04-03T00:00:00 2017-04-05 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.874298 https://doi.org/10.1594/PANGAEA.874298 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.874298 https://doi.org/10.1594/PANGAEA.874298 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Gomez-Saez, Gonzalo V; Niggemann, Jutta; Dittmar, Thorsten; Pohlabeln, Anika M; Lang, Susan Q; Noowong, Ann; Pichler, Thomas; Wörmer, Lars; Bühring, Solveig I (2016): Molecular evidence for abiotic sulfurization of dissolved organic matter in marine shallow hydrothermal systems. Geochimica et Cosmochimica Acta, 190, 35-52, https://doi.org/10.1016/j.gca.2016.06.027 Center for Marine Environmental Sciences MARUM Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.874298 https://doi.org/10.1016/j.gca.2016.06.027 2023-01-20T07:33:55Z Shallow submarine hydrothermal systems are extreme environments with strong redox gradients at the interface of hot, reduced fluids and cold, oxygenated seawater. Hydrothermal fluids are often depleted in sulfate when compared to surrounding seawater and can contain high concentrations of hydrogen sulfide (H2S). It is well known that sulfur in its various oxidation states plays an important role in processing and transformation of organic matter. However, the formation and the reactivity of dissolved organic sulfur (DOS) in the water column at hydrothermal systems are so far not well understood. We investigated DOS dynamics and its relation to the physicochemical environment by studying the molecular composition of dissolved organic matter (DOM) in three contrasting shallow hydrothermal systems off Milos (Eastern Mediterranean), Dominica (Caribbean Sea) and Iceland (North Atlantic). We used ultra-high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) to characterize the DOM on a molecular level. The molecular information was complemented with general geochemical data, quantitative dissolved organic carbon (DOC) and DOS analyses as well as isotopic measurements (d2H, d18O and F14C). In contrast to the predominantly meteoric fluids from Dominica and Iceland, hydrothermal fluids from Milos were mainly fed by recirculating seawater. The hydrothermal fluids from Milos were enriched in H2S and DOS, as indicated by high DOS/DOC ratios and by the fact that >90% of all assigned DOM formulas that were exclusively present in the fluids contained sulfur. In all three systems, DOS from hydrothermal fluids had on average lower O/C ratios (0.26?0.34) than surrounding surface seawater DOS (0.45?0.52), suggesting shallow hydrothermal systems as a source of reduced DOS, which will likely get oxidized upon contact with oxygenated seawater. Evaluation of hypothetical sulfurization reactions suggests DOM reduction and sulfurization during seawater recirculation in Milos seafloor. The four most ... Dataset Iceland North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-61.363000,24.522500,65.930511,13.854000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Center for Marine Environmental Sciences MARUM |
spellingShingle |
Center for Marine Environmental Sciences MARUM Gomez-Saez, Gonzalo V Niggemann, Jutta Dittmar, Thorsten Pohlabeln, Anika M Lang, Susan Q Noowong, Ann Pichler, Thomas Wörmer, Lars Bühring, Solveig I Geochemistry and dissolved organic matter in marine shallow hydrothermal systems |
topic_facet |
Center for Marine Environmental Sciences MARUM |
description |
Shallow submarine hydrothermal systems are extreme environments with strong redox gradients at the interface of hot, reduced fluids and cold, oxygenated seawater. Hydrothermal fluids are often depleted in sulfate when compared to surrounding seawater and can contain high concentrations of hydrogen sulfide (H2S). It is well known that sulfur in its various oxidation states plays an important role in processing and transformation of organic matter. However, the formation and the reactivity of dissolved organic sulfur (DOS) in the water column at hydrothermal systems are so far not well understood. We investigated DOS dynamics and its relation to the physicochemical environment by studying the molecular composition of dissolved organic matter (DOM) in three contrasting shallow hydrothermal systems off Milos (Eastern Mediterranean), Dominica (Caribbean Sea) and Iceland (North Atlantic). We used ultra-high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) to characterize the DOM on a molecular level. The molecular information was complemented with general geochemical data, quantitative dissolved organic carbon (DOC) and DOS analyses as well as isotopic measurements (d2H, d18O and F14C). In contrast to the predominantly meteoric fluids from Dominica and Iceland, hydrothermal fluids from Milos were mainly fed by recirculating seawater. The hydrothermal fluids from Milos were enriched in H2S and DOS, as indicated by high DOS/DOC ratios and by the fact that >90% of all assigned DOM formulas that were exclusively present in the fluids contained sulfur. In all three systems, DOS from hydrothermal fluids had on average lower O/C ratios (0.26?0.34) than surrounding surface seawater DOS (0.45?0.52), suggesting shallow hydrothermal systems as a source of reduced DOS, which will likely get oxidized upon contact with oxygenated seawater. Evaluation of hypothetical sulfurization reactions suggests DOM reduction and sulfurization during seawater recirculation in Milos seafloor. The four most ... |
format |
Dataset |
author |
Gomez-Saez, Gonzalo V Niggemann, Jutta Dittmar, Thorsten Pohlabeln, Anika M Lang, Susan Q Noowong, Ann Pichler, Thomas Wörmer, Lars Bühring, Solveig I |
author_facet |
Gomez-Saez, Gonzalo V Niggemann, Jutta Dittmar, Thorsten Pohlabeln, Anika M Lang, Susan Q Noowong, Ann Pichler, Thomas Wörmer, Lars Bühring, Solveig I |
author_sort |
Gomez-Saez, Gonzalo V |
title |
Geochemistry and dissolved organic matter in marine shallow hydrothermal systems |
title_short |
Geochemistry and dissolved organic matter in marine shallow hydrothermal systems |
title_full |
Geochemistry and dissolved organic matter in marine shallow hydrothermal systems |
title_fullStr |
Geochemistry and dissolved organic matter in marine shallow hydrothermal systems |
title_full_unstemmed |
Geochemistry and dissolved organic matter in marine shallow hydrothermal systems |
title_sort |
geochemistry and dissolved organic matter in marine shallow hydrothermal systems |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.874298 https://doi.org/10.1594/PANGAEA.874298 |
op_coverage |
MEDIAN LATITUDE: 34.043250 * MEDIAN LONGITUDE: -27.960852 * SOUTH-BOUND LATITUDE: 13.854000 * WEST-BOUND LONGITUDE: -61.363000 * NORTH-BOUND LATITUDE: 65.930511 * EAST-BOUND LONGITUDE: 24.522500 * DATE/TIME START: 2012-05-01T00:00:00 * DATE/TIME END: 2013-04-03T00:00:00 |
long_lat |
ENVELOPE(-61.363000,24.522500,65.930511,13.854000) |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_source |
Supplement to: Gomez-Saez, Gonzalo V; Niggemann, Jutta; Dittmar, Thorsten; Pohlabeln, Anika M; Lang, Susan Q; Noowong, Ann; Pichler, Thomas; Wörmer, Lars; Bühring, Solveig I (2016): Molecular evidence for abiotic sulfurization of dissolved organic matter in marine shallow hydrothermal systems. Geochimica et Cosmochimica Acta, 190, 35-52, https://doi.org/10.1016/j.gca.2016.06.027 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.874298 https://doi.org/10.1594/PANGAEA.874298 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.874298 https://doi.org/10.1016/j.gca.2016.06.027 |
_version_ |
1766039774974443520 |