DataSheet_1_Geochemistry of Hydrothermal Fluids From the E2-Segment of the East Scotia Ridge: Magmatic Input, Reaction Zone Processes, Fluid Mixing Regimes and Bioenergetic Landscapes.docx
The compositions of hydrothermal fluids in back-arc basins (BABs) can be affected by the influx of magmatic fluids into systems that are dominated by reactions between basement rocks and seawater-derived fluids. The East Scotia Ridge (ESR) in the Scotia Sea hosts such hydrothermal systems where the...
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2022
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Online Access: | https://doi.org/10.3389/fmars.2022.765648.s001 https://figshare.com/articles/dataset/DataSheet_1_Geochemistry_of_Hydrothermal_Fluids_From_the_E2-Segment_of_the_East_Scotia_Ridge_Magmatic_Input_Reaction_Zone_Processes_Fluid_Mixing_Regimes_and_Bioenergetic_Landscapes_docx/20071259 |
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ftfrontimediafig:oai:figshare.com:article/20071259 2023-05-15T18:16:01+02:00 DataSheet_1_Geochemistry of Hydrothermal Fluids From the E2-Segment of the East Scotia Ridge: Magmatic Input, Reaction Zone Processes, Fluid Mixing Regimes and Bioenergetic Landscapes.docx Samuel I. Pereira Alexander Diehl Jill M. McDermott Thomas Pape Lukas Klose Harald Strauss Gerhard Bohrmann Wolfgang Bach 2022-06-15T05:16:38Z https://doi.org/10.3389/fmars.2022.765648.s001 https://figshare.com/articles/dataset/DataSheet_1_Geochemistry_of_Hydrothermal_Fluids_From_the_E2-Segment_of_the_East_Scotia_Ridge_Magmatic_Input_Reaction_Zone_Processes_Fluid_Mixing_Regimes_and_Bioenergetic_Landscapes_docx/20071259 unknown doi:10.3389/fmars.2022.765648.s001 https://figshare.com/articles/dataset/DataSheet_1_Geochemistry_of_Hydrothermal_Fluids_From_the_E2-Segment_of_the_East_Scotia_Ridge_Magmatic_Input_Reaction_Zone_Processes_Fluid_Mixing_Regimes_and_Bioenergetic_Landscapes_docx/20071259 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering hydrothermal vents East Scotia Ridge back-arc basin conductive cooling magmatic water bioenergetics Southern Ocean Dataset 2022 ftfrontimediafig https://doi.org/10.3389/fmars.2022.765648.s001 2022-06-15T23:03:53Z The compositions of hydrothermal fluids in back-arc basins (BABs) can be affected by the influx of magmatic fluids into systems that are dominated by reactions between basement rocks and seawater-derived fluids. The East Scotia Ridge (ESR) in the Scotia Sea hosts such hydrothermal systems where the role of magmatic fluid influx has not yet been addressed. During expedition PS119 in 2019, three chimneys were sampled from the E2 segment. These samples were analysed for their chemical and isotopic composition along with fluid inclusions in corresponding precipitates. Our data provide evidence for the temporal evolution of hydrothermal fluids in this remote back-arc system. Salinity variations in anhydrite-hosted fluid inclusions indicate that phase separation takes place in the subseafloor. Moderate-temperature (<53°C) fluids from the newly discovered E2-West hydrothermal vent field and high-temperature (>320°C) fluids from the E2-South area were sampled. Depletions in fluid-mobile elements, ΣREE and low δ 18 O H2O show that the basement in this root zone has been leached since the previous sampling in 2010. The results indicate that high-temperature fluid-rock interactions are key in setting the composition of the fluids with cation-to-chloride ratios suggesting a common root zone for both vent sites. The concentrations of dissolved gases provide new insights in the connection between magmatic degassing and its influence on endmember vent fluid composition. Specifically, stable isotope (O, H) data and elevated CO 2 concentrations point to a minor influx of magmatic vapour. Stable sulphur isotopes provide no evidence for SO 2 disproportionation suggesting a H 2 O-CO 2 dominated nature of these vapours. The concentrations of conservative elements in the E2-W fluid reflects subseafloor mixing between E2-S endmember fluid and seawater. In contrast, non-conservative behaviour, and depletion of Fe, H 2 , and H 2 S point to a combination of sub-surface abiotic and biotic reactions affecting these fluids. Similarly, ... Dataset Scotia Sea Southern Ocean Frontiers: Figshare Southern Ocean Scotia Sea East Scotia Ridge ENVELOPE(-29.250,-29.250,-57.917,-57.917) |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering hydrothermal vents East Scotia Ridge back-arc basin conductive cooling magmatic water bioenergetics Southern Ocean |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering hydrothermal vents East Scotia Ridge back-arc basin conductive cooling magmatic water bioenergetics Southern Ocean Samuel I. Pereira Alexander Diehl Jill M. McDermott Thomas Pape Lukas Klose Harald Strauss Gerhard Bohrmann Wolfgang Bach DataSheet_1_Geochemistry of Hydrothermal Fluids From the E2-Segment of the East Scotia Ridge: Magmatic Input, Reaction Zone Processes, Fluid Mixing Regimes and Bioenergetic Landscapes.docx |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering hydrothermal vents East Scotia Ridge back-arc basin conductive cooling magmatic water bioenergetics Southern Ocean |
description |
The compositions of hydrothermal fluids in back-arc basins (BABs) can be affected by the influx of magmatic fluids into systems that are dominated by reactions between basement rocks and seawater-derived fluids. The East Scotia Ridge (ESR) in the Scotia Sea hosts such hydrothermal systems where the role of magmatic fluid influx has not yet been addressed. During expedition PS119 in 2019, three chimneys were sampled from the E2 segment. These samples were analysed for their chemical and isotopic composition along with fluid inclusions in corresponding precipitates. Our data provide evidence for the temporal evolution of hydrothermal fluids in this remote back-arc system. Salinity variations in anhydrite-hosted fluid inclusions indicate that phase separation takes place in the subseafloor. Moderate-temperature (<53°C) fluids from the newly discovered E2-West hydrothermal vent field and high-temperature (>320°C) fluids from the E2-South area were sampled. Depletions in fluid-mobile elements, ΣREE and low δ 18 O H2O show that the basement in this root zone has been leached since the previous sampling in 2010. The results indicate that high-temperature fluid-rock interactions are key in setting the composition of the fluids with cation-to-chloride ratios suggesting a common root zone for both vent sites. The concentrations of dissolved gases provide new insights in the connection between magmatic degassing and its influence on endmember vent fluid composition. Specifically, stable isotope (O, H) data and elevated CO 2 concentrations point to a minor influx of magmatic vapour. Stable sulphur isotopes provide no evidence for SO 2 disproportionation suggesting a H 2 O-CO 2 dominated nature of these vapours. The concentrations of conservative elements in the E2-W fluid reflects subseafloor mixing between E2-S endmember fluid and seawater. In contrast, non-conservative behaviour, and depletion of Fe, H 2 , and H 2 S point to a combination of sub-surface abiotic and biotic reactions affecting these fluids. Similarly, ... |
format |
Dataset |
author |
Samuel I. Pereira Alexander Diehl Jill M. McDermott Thomas Pape Lukas Klose Harald Strauss Gerhard Bohrmann Wolfgang Bach |
author_facet |
Samuel I. Pereira Alexander Diehl Jill M. McDermott Thomas Pape Lukas Klose Harald Strauss Gerhard Bohrmann Wolfgang Bach |
author_sort |
Samuel I. Pereira |
title |
DataSheet_1_Geochemistry of Hydrothermal Fluids From the E2-Segment of the East Scotia Ridge: Magmatic Input, Reaction Zone Processes, Fluid Mixing Regimes and Bioenergetic Landscapes.docx |
title_short |
DataSheet_1_Geochemistry of Hydrothermal Fluids From the E2-Segment of the East Scotia Ridge: Magmatic Input, Reaction Zone Processes, Fluid Mixing Regimes and Bioenergetic Landscapes.docx |
title_full |
DataSheet_1_Geochemistry of Hydrothermal Fluids From the E2-Segment of the East Scotia Ridge: Magmatic Input, Reaction Zone Processes, Fluid Mixing Regimes and Bioenergetic Landscapes.docx |
title_fullStr |
DataSheet_1_Geochemistry of Hydrothermal Fluids From the E2-Segment of the East Scotia Ridge: Magmatic Input, Reaction Zone Processes, Fluid Mixing Regimes and Bioenergetic Landscapes.docx |
title_full_unstemmed |
DataSheet_1_Geochemistry of Hydrothermal Fluids From the E2-Segment of the East Scotia Ridge: Magmatic Input, Reaction Zone Processes, Fluid Mixing Regimes and Bioenergetic Landscapes.docx |
title_sort |
datasheet_1_geochemistry of hydrothermal fluids from the e2-segment of the east scotia ridge: magmatic input, reaction zone processes, fluid mixing regimes and bioenergetic landscapes.docx |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.765648.s001 https://figshare.com/articles/dataset/DataSheet_1_Geochemistry_of_Hydrothermal_Fluids_From_the_E2-Segment_of_the_East_Scotia_Ridge_Magmatic_Input_Reaction_Zone_Processes_Fluid_Mixing_Regimes_and_Bioenergetic_Landscapes_docx/20071259 |
long_lat |
ENVELOPE(-29.250,-29.250,-57.917,-57.917) |
geographic |
Southern Ocean Scotia Sea East Scotia Ridge |
geographic_facet |
Southern Ocean Scotia Sea East Scotia Ridge |
genre |
Scotia Sea Southern Ocean |
genre_facet |
Scotia Sea Southern Ocean |
op_relation |
doi:10.3389/fmars.2022.765648.s001 https://figshare.com/articles/dataset/DataSheet_1_Geochemistry_of_Hydrothermal_Fluids_From_the_E2-Segment_of_the_East_Scotia_Ridge_Magmatic_Input_Reaction_Zone_Processes_Fluid_Mixing_Regimes_and_Bioenergetic_Landscapes_docx/20071259 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.765648.s001 |
_version_ |
1766189437655449600 |