Source to sink analysis of weathering fluxes in Lake Baikal and its watershed based on riverine fluxes, elemental lake budgets, REE patterns, and radiogenic (Nd, Sr) and 10 Be/ 9 Be isotopes
International audience We present a detailed analysis of weathering fluxes at Lake Baikal, the largest lake in the world, using the major element, trace element and isotope geochemistry of major inflowing rivers, the lake itself, and its sediments. Our objective is to assess how lake records could b...
Published in: | Geochimica et Cosmochimica Acta |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://insu.hal.science/insu-03671378 https://insu.hal.science/insu-03671378/document https://insu.hal.science/insu-03671378/file/1-s2.0-S0016703722000163-main.pdf https://doi.org/10.1016/j.gca.2022.01.007 |
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ftutoulouse3hal:oai:HAL:insu-03671378v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université Toulouse III - Paul Sabatier: HAL-UPS |
op_collection_id |
ftutoulouse3hal |
language |
English |
topic |
Lake Baikal Weathering Erosion Denudation Meteoric beryllium Radiogenic isotopes REE [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Lake Baikal Weathering Erosion Denudation Meteoric beryllium Radiogenic isotopes REE [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Suhrhoff, Tim Jesper Rickli, Jörg Christl, Marcus Vologina, Elena G. Pham, Viet Belhadj, Moustafa Sklyarov, Eugene V. Jeandel, Catherine Vance, Derek Source to sink analysis of weathering fluxes in Lake Baikal and its watershed based on riverine fluxes, elemental lake budgets, REE patterns, and radiogenic (Nd, Sr) and 10 Be/ 9 Be isotopes |
topic_facet |
Lake Baikal Weathering Erosion Denudation Meteoric beryllium Radiogenic isotopes REE [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience We present a detailed analysis of weathering fluxes at Lake Baikal, the largest lake in the world, using the major element, trace element and isotope geochemistry of major inflowing rivers, the lake itself, and its sediments. Our objective is to assess how lake records could be used to understand river-catchment-scale denudation and weathering processes. Total denudation rates at Lake Baikal, as obtained from meteoric 10 Be/ 9 Be, are an order of magnitude lower than the global average, at 16-35 t km -2 yr -1 . Chemical weathering rates obtained from the riverine dissolved load and discharge are, on the other hand, in the same range as global values, at 6-29 t km -2 yr -1 . Chemical weathering rates are higher in the north of the catchment than in the south, consistent with higher runoff in the north. In contrast, 10 Be/ 9 Be-derived denudation rates are higher in the south. We hypothesize that this pattern of variation may be due to the stabilizing effect of permafrost soils preventing erosion in the north. An inverse model shows that the Selenga River, Lake Baikal's major tributary, has a silicate weathering contribution to riverine dissolved cation fluxes of 42 mol%; this and other characteristics are representative of large rivers globally. Many trace elements have much lower concentrations in the lake than in inflowing rivers (Be (5%), Mn (3%), Fe (0.4%) and REE (1-2%)). We suggest, based on REE patterns and Mn, Fe-depth profiles in the lake, that this removal is the result of pH induced changes in dissolved-adsorbed partitioning at the river-lake interface, and the incorporation of trace elements into authigenic Fe-Mn (oxyhydr)oxide phases forming within the lake. Strontium is isotopically uniform within the lake, demonstrating that the whole lake mixes on a timescale shorter than its residence time (<330 years). Neodymium and Be, in contrast, show isotopic variability between the basins. While the Sr isotope budget of the lake is largely consistent with observed riverine Sr ... |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Suhrhoff, Tim Jesper Rickli, Jörg Christl, Marcus Vologina, Elena G. Pham, Viet Belhadj, Moustafa Sklyarov, Eugene V. Jeandel, Catherine Vance, Derek |
author_facet |
Suhrhoff, Tim Jesper Rickli, Jörg Christl, Marcus Vologina, Elena G. Pham, Viet Belhadj, Moustafa Sklyarov, Eugene V. Jeandel, Catherine Vance, Derek |
author_sort |
Suhrhoff, Tim Jesper |
title |
Source to sink analysis of weathering fluxes in Lake Baikal and its watershed based on riverine fluxes, elemental lake budgets, REE patterns, and radiogenic (Nd, Sr) and 10 Be/ 9 Be isotopes |
title_short |
Source to sink analysis of weathering fluxes in Lake Baikal and its watershed based on riverine fluxes, elemental lake budgets, REE patterns, and radiogenic (Nd, Sr) and 10 Be/ 9 Be isotopes |
title_full |
Source to sink analysis of weathering fluxes in Lake Baikal and its watershed based on riverine fluxes, elemental lake budgets, REE patterns, and radiogenic (Nd, Sr) and 10 Be/ 9 Be isotopes |
title_fullStr |
Source to sink analysis of weathering fluxes in Lake Baikal and its watershed based on riverine fluxes, elemental lake budgets, REE patterns, and radiogenic (Nd, Sr) and 10 Be/ 9 Be isotopes |
title_full_unstemmed |
Source to sink analysis of weathering fluxes in Lake Baikal and its watershed based on riverine fluxes, elemental lake budgets, REE patterns, and radiogenic (Nd, Sr) and 10 Be/ 9 Be isotopes |
title_sort |
source to sink analysis of weathering fluxes in lake baikal and its watershed based on riverine fluxes, elemental lake budgets, ree patterns, and radiogenic (nd, sr) and 10 be/ 9 be isotopes |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03671378 https://insu.hal.science/insu-03671378/document https://insu.hal.science/insu-03671378/file/1-s2.0-S0016703722000163-main.pdf https://doi.org/10.1016/j.gca.2022.01.007 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
ISSN: 0016-7037 EISSN: 0016-7037 Geochimica et Cosmochimica Acta https://insu.hal.science/insu-03671378 Geochimica et Cosmochimica Acta, 2022, 321, pp.133-154. ⟨10.1016/j.gca.2022.01.007⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gca.2022.01.007 insu-03671378 https://insu.hal.science/insu-03671378 https://insu.hal.science/insu-03671378/document https://insu.hal.science/insu-03671378/file/1-s2.0-S0016703722000163-main.pdf BIBCODE: 2022GeCoA.321.133S doi:10.1016/j.gca.2022.01.007 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.gca.2022.01.007 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
321 |
container_start_page |
133 |
op_container_end_page |
154 |
_version_ |
1785572919236100096 |
spelling |
ftutoulouse3hal:oai:HAL:insu-03671378v1 2023-12-17T10:48:41+01:00 Source to sink analysis of weathering fluxes in Lake Baikal and its watershed based on riverine fluxes, elemental lake budgets, REE patterns, and radiogenic (Nd, Sr) and 10 Be/ 9 Be isotopes Suhrhoff, Tim Jesper Rickli, Jörg Christl, Marcus Vologina, Elena G. Pham, Viet Belhadj, Moustafa Sklyarov, Eugene V. Jeandel, Catherine Vance, Derek Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 2022 https://insu.hal.science/insu-03671378 https://insu.hal.science/insu-03671378/document https://insu.hal.science/insu-03671378/file/1-s2.0-S0016703722000163-main.pdf https://doi.org/10.1016/j.gca.2022.01.007 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gca.2022.01.007 insu-03671378 https://insu.hal.science/insu-03671378 https://insu.hal.science/insu-03671378/document https://insu.hal.science/insu-03671378/file/1-s2.0-S0016703722000163-main.pdf BIBCODE: 2022GeCoA.321.133S doi:10.1016/j.gca.2022.01.007 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0016-7037 EISSN: 0016-7037 Geochimica et Cosmochimica Acta https://insu.hal.science/insu-03671378 Geochimica et Cosmochimica Acta, 2022, 321, pp.133-154. ⟨10.1016/j.gca.2022.01.007⟩ Lake Baikal Weathering Erosion Denudation Meteoric beryllium Radiogenic isotopes REE [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2022 ftutoulouse3hal https://doi.org/10.1016/j.gca.2022.01.007 2023-11-22T17:49:57Z International audience We present a detailed analysis of weathering fluxes at Lake Baikal, the largest lake in the world, using the major element, trace element and isotope geochemistry of major inflowing rivers, the lake itself, and its sediments. Our objective is to assess how lake records could be used to understand river-catchment-scale denudation and weathering processes. Total denudation rates at Lake Baikal, as obtained from meteoric 10 Be/ 9 Be, are an order of magnitude lower than the global average, at 16-35 t km -2 yr -1 . Chemical weathering rates obtained from the riverine dissolved load and discharge are, on the other hand, in the same range as global values, at 6-29 t km -2 yr -1 . Chemical weathering rates are higher in the north of the catchment than in the south, consistent with higher runoff in the north. In contrast, 10 Be/ 9 Be-derived denudation rates are higher in the south. We hypothesize that this pattern of variation may be due to the stabilizing effect of permafrost soils preventing erosion in the north. An inverse model shows that the Selenga River, Lake Baikal's major tributary, has a silicate weathering contribution to riverine dissolved cation fluxes of 42 mol%; this and other characteristics are representative of large rivers globally. Many trace elements have much lower concentrations in the lake than in inflowing rivers (Be (5%), Mn (3%), Fe (0.4%) and REE (1-2%)). We suggest, based on REE patterns and Mn, Fe-depth profiles in the lake, that this removal is the result of pH induced changes in dissolved-adsorbed partitioning at the river-lake interface, and the incorporation of trace elements into authigenic Fe-Mn (oxyhydr)oxide phases forming within the lake. Strontium is isotopically uniform within the lake, demonstrating that the whole lake mixes on a timescale shorter than its residence time (<330 years). Neodymium and Be, in contrast, show isotopic variability between the basins. While the Sr isotope budget of the lake is largely consistent with observed riverine Sr ... Article in Journal/Newspaper permafrost Université Toulouse III - Paul Sabatier: HAL-UPS Geochimica et Cosmochimica Acta 321 133 154 |