REE distribution and Nd isotope composition of estuarine waters and bulk sediment leachates tracing lithogenic inputs in eastern Canada

The rare earth element (REE) concentrations and the neodymium (Nd) and strontium (Sr) isotope compositions of the detrital fraction and authigenic FeMn oxyhydroxide coatings of marine sediments may provide valuable information for better understanding the pathways of weathering inputs and estuarine...

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Published in:Marine Chemistry
Main Authors: Casse, Marie, Montero-serrano, Jean-carlos, St-onge, Guillaume, Poirier, André
Format: Text
Language:English
Published: Elsevier BV
Subjects:
geo
Online Access:https://doi.org/10.1016/j.marchem.2019.03.012
https://archimer.ifremer.fr/doc/00485/59708/85379.pdf
https://archimer.ifremer.fr/doc/00485/59708/
id fttriple:oai:gotriple.eu:10670/1.orwawx
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spelling fttriple:oai:gotriple.eu:10670/1.orwawx 2023-05-15T15:35:07+02:00 REE distribution and Nd isotope composition of estuarine waters and bulk sediment leachates tracing lithogenic inputs in eastern Canada Casse, Marie Montero-serrano, Jean-carlos St-onge, Guillaume Poirier, André https://doi.org/10.1016/j.marchem.2019.03.012 https://archimer.ifremer.fr/doc/00485/59708/85379.pdf https://archimer.ifremer.fr/doc/00485/59708/ en eng Elsevier BV doi:10.1016/j.marchem.2019.03.012 10670/1.orwawx https://archimer.ifremer.fr/doc/00485/59708/85379.pdf https://archimer.ifremer.fr/doc/00485/59708/ other Archimer, archive institutionnelle de l'Ifremer Marine Chemistry (0304-4203) (Elsevier BV), 2019-04 , Vol. 211 , P. 117-130 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1016/j.marchem.2019.03.012 2023-01-22T16:38:05Z The rare earth element (REE) concentrations and the neodymium (Nd) and strontium (Sr) isotope compositions of the detrital fraction and authigenic FeMn oxyhydroxide coatings of marine sediments may provide valuable information for better understanding the pathways of weathering inputs and estuarine and coastal exchange processes on different time scales. Here, we present the REE concentrations and 143Nd/144Nd (expressed in epsilon units, εNd) and 87Sr/86Sr ratios of detrital and authigenic (leached FeMn oxyhydroxides) fractions from sediment core-top samples and of estuarine water samples collected in the Estuary and Gulf of St. Lawrence (EGSL) and continental shelf off southeastern Canada. The REE distribution patterns, εNd values, and 87Sr/86Sr isotopic values from the detrital fraction allow for the discrimination of sediment from continental sources in the EGSL. Sediments in the Baie des Chaleurs and on the continental shelf, which have εNd values ranging from −14.3 to −16, 87Sr/86Sr values ranging from 0.72708 to 0.71475, and low La/Yb and Gd/Yb ratios, are mainly supplied by the early Paleozoic Appalachian Mountains. In contrast, sediments in the Laurentian and Esquiman channels (εNd = −18.7 to −21.8, 87Sr/86Sr = 0.72068 to 0.72607, and high La/Yb and Gd/Yb ratios) come from the Grenvillian metamorphic rocks in the Canadian Shield, and surface sediments on the southern Labrador Shelf (εNd = −28.7, 87Sr/86Sr = 0.73062, and high La/Yb and Gd/Yb ratios) mainly originate from the Hudson Strait and Baffin Bay. The εNd values obtained from estuarine water samples and bulk sediment leachates are unradiogenic, with values ranging between −18.9 and − 21.7 and between −16.1 and − 27.2, respectively. Based on these results and the dissolved REE concentrations, we speculate that salt-induced coagulation of colloidal matter, dissolution of lithogenic sediments from the adjacent continents (notably from the erosion of the Grenville Province on the North Shore), bottom scavenging within the nepheloid layer, and brine ... Text Baffin Bay Baffin Bay Baffin Hudson Strait Unknown Baffin Bay Canada Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) Labrador Shelf ENVELOPE(-58.000,-58.000,56.000,56.000) Marine Chemistry 211 117 130
institution Open Polar
collection Unknown
op_collection_id fttriple
language English
topic geo
envir
spellingShingle geo
envir
Casse, Marie
Montero-serrano, Jean-carlos
St-onge, Guillaume
Poirier, André
REE distribution and Nd isotope composition of estuarine waters and bulk sediment leachates tracing lithogenic inputs in eastern Canada
topic_facet geo
envir
description The rare earth element (REE) concentrations and the neodymium (Nd) and strontium (Sr) isotope compositions of the detrital fraction and authigenic FeMn oxyhydroxide coatings of marine sediments may provide valuable information for better understanding the pathways of weathering inputs and estuarine and coastal exchange processes on different time scales. Here, we present the REE concentrations and 143Nd/144Nd (expressed in epsilon units, εNd) and 87Sr/86Sr ratios of detrital and authigenic (leached FeMn oxyhydroxides) fractions from sediment core-top samples and of estuarine water samples collected in the Estuary and Gulf of St. Lawrence (EGSL) and continental shelf off southeastern Canada. The REE distribution patterns, εNd values, and 87Sr/86Sr isotopic values from the detrital fraction allow for the discrimination of sediment from continental sources in the EGSL. Sediments in the Baie des Chaleurs and on the continental shelf, which have εNd values ranging from −14.3 to −16, 87Sr/86Sr values ranging from 0.72708 to 0.71475, and low La/Yb and Gd/Yb ratios, are mainly supplied by the early Paleozoic Appalachian Mountains. In contrast, sediments in the Laurentian and Esquiman channels (εNd = −18.7 to −21.8, 87Sr/86Sr = 0.72068 to 0.72607, and high La/Yb and Gd/Yb ratios) come from the Grenvillian metamorphic rocks in the Canadian Shield, and surface sediments on the southern Labrador Shelf (εNd = −28.7, 87Sr/86Sr = 0.73062, and high La/Yb and Gd/Yb ratios) mainly originate from the Hudson Strait and Baffin Bay. The εNd values obtained from estuarine water samples and bulk sediment leachates are unradiogenic, with values ranging between −18.9 and − 21.7 and between −16.1 and − 27.2, respectively. Based on these results and the dissolved REE concentrations, we speculate that salt-induced coagulation of colloidal matter, dissolution of lithogenic sediments from the adjacent continents (notably from the erosion of the Grenville Province on the North Shore), bottom scavenging within the nepheloid layer, and brine ...
format Text
author Casse, Marie
Montero-serrano, Jean-carlos
St-onge, Guillaume
Poirier, André
author_facet Casse, Marie
Montero-serrano, Jean-carlos
St-onge, Guillaume
Poirier, André
author_sort Casse, Marie
title REE distribution and Nd isotope composition of estuarine waters and bulk sediment leachates tracing lithogenic inputs in eastern Canada
title_short REE distribution and Nd isotope composition of estuarine waters and bulk sediment leachates tracing lithogenic inputs in eastern Canada
title_full REE distribution and Nd isotope composition of estuarine waters and bulk sediment leachates tracing lithogenic inputs in eastern Canada
title_fullStr REE distribution and Nd isotope composition of estuarine waters and bulk sediment leachates tracing lithogenic inputs in eastern Canada
title_full_unstemmed REE distribution and Nd isotope composition of estuarine waters and bulk sediment leachates tracing lithogenic inputs in eastern Canada
title_sort ree distribution and nd isotope composition of estuarine waters and bulk sediment leachates tracing lithogenic inputs in eastern canada
publisher Elsevier BV
url https://doi.org/10.1016/j.marchem.2019.03.012
https://archimer.ifremer.fr/doc/00485/59708/85379.pdf
https://archimer.ifremer.fr/doc/00485/59708/
long_lat ENVELOPE(-70.000,-70.000,62.000,62.000)
ENVELOPE(-58.000,-58.000,56.000,56.000)
geographic Baffin Bay
Canada
Hudson
Hudson Strait
Labrador Shelf
geographic_facet Baffin Bay
Canada
Hudson
Hudson Strait
Labrador Shelf
genre Baffin Bay
Baffin Bay
Baffin
Hudson Strait
genre_facet Baffin Bay
Baffin Bay
Baffin
Hudson Strait
op_source Archimer, archive institutionnelle de l'Ifremer
Marine Chemistry (0304-4203) (Elsevier BV), 2019-04 , Vol. 211 , P. 117-130
op_relation doi:10.1016/j.marchem.2019.03.012
10670/1.orwawx
https://archimer.ifremer.fr/doc/00485/59708/85379.pdf
https://archimer.ifremer.fr/doc/00485/59708/
op_rights other
op_doi https://doi.org/10.1016/j.marchem.2019.03.012
container_title Marine Chemistry
container_volume 211
container_start_page 117
op_container_end_page 130
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