Tracing the Scale of Fluid Flow in Subduction Zone Forearcs: Implications from Fluid-Mobile elements
International audience Despite the importance of fluids in subduction zone processes, the extent of mass transfer and fluid circulation from the subducting plate through the forearc region remain unclear. To estimate the fluid budget and scale of fluid circulation in subducted sediments, we assess t...
Published in: | Chemical Geology |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2024
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Subjects: | |
Online Access: | https://insu.hal.science/insu-04577988 https://insu.hal.science/insu-04577988/document https://insu.hal.science/insu-04577988/file/1-s2.0-S0009254124002213-main.pdf https://doi.org/10.1016/j.chemgeo.2024.122141 |
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ftanrparis:oai:HAL:insu-04577988v1 |
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institution |
Open Polar |
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Portail HAL-ANR (Agence Nationale de la Recherche) |
op_collection_id |
ftanrparis |
language |
English |
topic |
Subduction zone Fluid-mobile elements Fluid-rock interaction Fluid inclusions LA-ICP-MS Mass-balance calculations [SDU]Sciences of the Universe [physics] |
spellingShingle |
Subduction zone Fluid-mobile elements Fluid-rock interaction Fluid inclusions LA-ICP-MS Mass-balance calculations [SDU]Sciences of the Universe [physics] Rajič, Kristijan Raimbourg, Hugues Gion, Austin, M Lerouge, Catherine Erdmann, Saskia Tracing the Scale of Fluid Flow in Subduction Zone Forearcs: Implications from Fluid-Mobile elements |
topic_facet |
Subduction zone Fluid-mobile elements Fluid-rock interaction Fluid inclusions LA-ICP-MS Mass-balance calculations [SDU]Sciences of the Universe [physics] |
description |
International audience Despite the importance of fluids in subduction zone processes, the extent of mass transfer and fluid circulation from the subducting plate through the forearc region remain unclear. To estimate the fluid budget and scale of fluid circulation in subducted sediments, we assess the distribution and retention of fluid-mobile elements (FME) in metamorphically equivalent metapelites from the Kodiak complex (Alaska) and the Shimanto Belt (Japan). The temperature range of interest is 230–350 °C, i.e., encompasses the base of the seismogenic zone. We examine the Li, B, Rb, Sr, Cs, and Ba concentrations in the bulk rock, as well as in fluid inclusions and individual minerals by (LA-) ICP-MS.The whole-rock composition in metapelites from Kodiak shows no significant loss of FME, which is in contrast to Shimanto where between 10% and 55% of FME (particularly Li, B and Cs) are leached out of rocks. The FME budget in Kodiak is consistent with a redistribution of elements between metamorphic illite and chlorite, whereas in Shimanto the loss of Li, B and Cs as temperature increases is the result of decreasing concentrations in illite and chlorite. The semi-quantitative analysis of fluid inclusions is consistent with a significant enrichment in all analyzed trace elements relative to seawater and interstitial pore fluids of seafloor sediments.Combining the fluid compositions with the whole-rock compositions, mass balance calculations were performed for B, Cs, and Ba. In the Kodiak complex the mass balance calculations are consistent with closed-system behavior, wherein the fluid is an insignificant reservoir for FME. Conversely, in the Shimanto Belt the mass balance calculations are consistent with open-system behavior, wherein large amounts of fluid percolated through rocks and the mass water-rock ratios correspond to 0.5–2.2. We infer that such an open system behavior was promoted by a larger amount of internal strain and the proximity to a large-scale fault zone. Moreover, fluid compositions observed ... |
author2 |
Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) Bureau de Recherches Géologiques et Minières (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Magma & Déformation Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Bureau de Recherches Géologiques et Minières (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Durham University University of Oxford Bureau de Recherches Géologiques et Minières (BRGM) ANR-11-EQPX-0036,PLANEX,Planète Expérimentation: simulation et analyse in-situ en conditions extrêmes(2011) ANR-10-LABX-0100,VOLTAIRE,Geofluids and Volatil elements – Earth, Atmosphere, Interfaces – Resources and Environment(2010) |
format |
Article in Journal/Newspaper |
author |
Rajič, Kristijan Raimbourg, Hugues Gion, Austin, M Lerouge, Catherine Erdmann, Saskia |
author_facet |
Rajič, Kristijan Raimbourg, Hugues Gion, Austin, M Lerouge, Catherine Erdmann, Saskia |
author_sort |
Rajič, Kristijan |
title |
Tracing the Scale of Fluid Flow in Subduction Zone Forearcs: Implications from Fluid-Mobile elements |
title_short |
Tracing the Scale of Fluid Flow in Subduction Zone Forearcs: Implications from Fluid-Mobile elements |
title_full |
Tracing the Scale of Fluid Flow in Subduction Zone Forearcs: Implications from Fluid-Mobile elements |
title_fullStr |
Tracing the Scale of Fluid Flow in Subduction Zone Forearcs: Implications from Fluid-Mobile elements |
title_full_unstemmed |
Tracing the Scale of Fluid Flow in Subduction Zone Forearcs: Implications from Fluid-Mobile elements |
title_sort |
tracing the scale of fluid flow in subduction zone forearcs: implications from fluid-mobile elements |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://insu.hal.science/insu-04577988 https://insu.hal.science/insu-04577988/document https://insu.hal.science/insu-04577988/file/1-s2.0-S0009254124002213-main.pdf https://doi.org/10.1016/j.chemgeo.2024.122141 |
genre |
Kodiak Alaska |
genre_facet |
Kodiak Alaska |
op_source |
ISSN: 0009-2541 Chemical Geology https://insu.hal.science/insu-04577988 Chemical Geology, 2024, 659, ⟨10.1016/j.chemgeo.2024.122141⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.chemgeo.2024.122141 insu-04577988 https://insu.hal.science/insu-04577988 https://insu.hal.science/insu-04577988/document https://insu.hal.science/insu-04577988/file/1-s2.0-S0009254124002213-main.pdf doi:10.1016/j.chemgeo.2024.122141 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.chemgeo.2024.122141 |
container_title |
Chemical Geology |
container_volume |
659 |
container_start_page |
122141 |
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1802008425036513280 |
spelling |
ftanrparis:oai:HAL:insu-04577988v1 2024-06-16T07:41:16+00:00 Tracing the Scale of Fluid Flow in Subduction Zone Forearcs: Implications from Fluid-Mobile elements Rajič, Kristijan Raimbourg, Hugues Gion, Austin, M Lerouge, Catherine Erdmann, Saskia Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) Bureau de Recherches Géologiques et Minières (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Magma & Déformation Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Bureau de Recherches Géologiques et Minières (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Durham University University of Oxford Bureau de Recherches Géologiques et Minières (BRGM) ANR-11-EQPX-0036,PLANEX,Planète Expérimentation: simulation et analyse in-situ en conditions extrêmes(2011) ANR-10-LABX-0100,VOLTAIRE,Geofluids and Volatil elements – Earth, Atmosphere, Interfaces – Resources and Environment(2010) 2024-05-08 https://insu.hal.science/insu-04577988 https://insu.hal.science/insu-04577988/document https://insu.hal.science/insu-04577988/file/1-s2.0-S0009254124002213-main.pdf https://doi.org/10.1016/j.chemgeo.2024.122141 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.chemgeo.2024.122141 insu-04577988 https://insu.hal.science/insu-04577988 https://insu.hal.science/insu-04577988/document https://insu.hal.science/insu-04577988/file/1-s2.0-S0009254124002213-main.pdf doi:10.1016/j.chemgeo.2024.122141 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0009-2541 Chemical Geology https://insu.hal.science/insu-04577988 Chemical Geology, 2024, 659, ⟨10.1016/j.chemgeo.2024.122141⟩ Subduction zone Fluid-mobile elements Fluid-rock interaction Fluid inclusions LA-ICP-MS Mass-balance calculations [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2024 ftanrparis https://doi.org/10.1016/j.chemgeo.2024.122141 2024-05-22T23:39:42Z International audience Despite the importance of fluids in subduction zone processes, the extent of mass transfer and fluid circulation from the subducting plate through the forearc region remain unclear. To estimate the fluid budget and scale of fluid circulation in subducted sediments, we assess the distribution and retention of fluid-mobile elements (FME) in metamorphically equivalent metapelites from the Kodiak complex (Alaska) and the Shimanto Belt (Japan). The temperature range of interest is 230–350 °C, i.e., encompasses the base of the seismogenic zone. We examine the Li, B, Rb, Sr, Cs, and Ba concentrations in the bulk rock, as well as in fluid inclusions and individual minerals by (LA-) ICP-MS.The whole-rock composition in metapelites from Kodiak shows no significant loss of FME, which is in contrast to Shimanto where between 10% and 55% of FME (particularly Li, B and Cs) are leached out of rocks. The FME budget in Kodiak is consistent with a redistribution of elements between metamorphic illite and chlorite, whereas in Shimanto the loss of Li, B and Cs as temperature increases is the result of decreasing concentrations in illite and chlorite. The semi-quantitative analysis of fluid inclusions is consistent with a significant enrichment in all analyzed trace elements relative to seawater and interstitial pore fluids of seafloor sediments.Combining the fluid compositions with the whole-rock compositions, mass balance calculations were performed for B, Cs, and Ba. In the Kodiak complex the mass balance calculations are consistent with closed-system behavior, wherein the fluid is an insignificant reservoir for FME. Conversely, in the Shimanto Belt the mass balance calculations are consistent with open-system behavior, wherein large amounts of fluid percolated through rocks and the mass water-rock ratios correspond to 0.5–2.2. We infer that such an open system behavior was promoted by a larger amount of internal strain and the proximity to a large-scale fault zone. Moreover, fluid compositions observed ... Article in Journal/Newspaper Kodiak Alaska Portail HAL-ANR (Agence Nationale de la Recherche) Chemical Geology 659 122141 |