Late Holocene dust provenance at Siple Dome, Antarctica
International audience Compositions of mineral dust in ice cores serve as tracers of paleo-atmospheric circulation patterns, providing linkages between sources and sinks. Here we document the geochemical makeup of dust reaching continental West Antarctica, on late Holocene samples from the Siple Dom...
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03664859 https://doi.org/10.1016/j.quascirev.2021.107271 |
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ftunivnantes:oai:HAL:insu-03664859v1 2023-05-15T14:02:57+02:00 Late Holocene dust provenance at Siple Dome, Antarctica Koffman, Bess G. Goldstein, Steven L. Winckler, Gisela Kaplan, Michael R. Kreutz, Karl J. Bolge, Louise Bory, Aloys Biscaye, Pierre Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) 2021 https://hal-insu.archives-ouvertes.fr/insu-03664859 https://doi.org/10.1016/j.quascirev.2021.107271 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2021.107271 insu-03664859 https://hal-insu.archives-ouvertes.fr/insu-03664859 BIBCODE: 2021QSRv.27407271K doi:10.1016/j.quascirev.2021.107271 Quaternary Science Reviews https://hal-insu.archives-ouvertes.fr/insu-03664859 Quaternary Science Reviews, 2021, 274, ⟨10.1016/j.quascirev.2021.107271⟩ Antarctica Dust provenance Sr-Nd isotopes Ice cores Southern ocean Gaussberg volcano [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.1016/j.quascirev.2021.107271 2022-12-07T00:38:42Z International audience Compositions of mineral dust in ice cores serve as tracers of paleo-atmospheric circulation patterns, providing linkages between sources and sinks. Here we document the geochemical makeup of dust reaching continental West Antarctica, on late Holocene samples from the Siple Dome A ice core (spanning ∼1030-1800 C.E). The Nd-Sr isotope signature is unusual for Antarctic ice core dust samples. Siple Dome data are characterized by low Nd isotope ratios (as low as εNd = -16.3) along with low Sr isotope ratios (highest 87 Sr/ 86 Sr = 0.7102) compared with other Antarctic dust signatures. A well-defined inverse correlation between Sr-Nd isotope ratios indicates two primary mixing sources. The low εNd-values indicate involvement of ancient (Archean-to-early Proterozoic) continental crust, as either the direct source or as a precursor of the source, and the low Sr-values require low Rb/Sr ratios that often reflect high-grade metamorphism. The known Antarctic terrane with these characteristics is parts of Enderby Land, nearly at the opposite end of Antarctica. The isotopic signature of the second end-member is compatible with West Antarctic volcanoes or Patagonia in South America. The Sr-Nd isotopes and trace element abundances are also chemically compatible with mixing between volcanic material from Gaussberg, a small lamproite volcano in Kaiser Wilhelm II Land in coastal East Antarctica whose source is ancient lithospheric mantle, with dust from Patagonia or material from West Antarctic volcanoes. We assess these potential mixing scenarios and conclude that Siple Dome's unusual geochemical signature can best be explained by a mixture of Patagonian dust and a Gaussberg-like source, with additional minor contributions from old eroded Archean-to-early Proterozoic bedrock sources such as those in Enderby Land. Moreover, Siple Dome dust compositions are distinct from dust deposited on Taylor and Clark Glaciers in the McMurdo Dry Valleys of the western Ross Sea, precluding the Dry Valleys as a late ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Enderby Land ice core Kaiser Wilhelm II land McMurdo Dry Valleys Ross Sea Southern Ocean West Antarctica Wilhelm II Land Université de Nantes: HAL-UNIV-NANTES Antarctic East Antarctica Gaussberg ENVELOPE(89.183,89.183,-66.800,-66.800) Kaiser-Wilhelm-II.-Land ENVELOPE(89.500,89.500,-66.833,-66.833) McMurdo Dry Valleys Patagonia Ross Sea Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Dome ENVELOPE(-148.833,-148.833,-81.667,-81.667) Southern Ocean West Antarctica Wilhelm II Land ENVELOPE(90.000,90.000,-67.000,-67.000) Quaternary Science Reviews 274 107271 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Antarctica Dust provenance Sr-Nd isotopes Ice cores Southern ocean Gaussberg volcano [SDU]Sciences of the Universe [physics] |
spellingShingle |
Antarctica Dust provenance Sr-Nd isotopes Ice cores Southern ocean Gaussberg volcano [SDU]Sciences of the Universe [physics] Koffman, Bess G. Goldstein, Steven L. Winckler, Gisela Kaplan, Michael R. Kreutz, Karl J. Bolge, Louise Bory, Aloys Biscaye, Pierre Late Holocene dust provenance at Siple Dome, Antarctica |
topic_facet |
Antarctica Dust provenance Sr-Nd isotopes Ice cores Southern ocean Gaussberg volcano [SDU]Sciences of the Universe [physics] |
description |
International audience Compositions of mineral dust in ice cores serve as tracers of paleo-atmospheric circulation patterns, providing linkages between sources and sinks. Here we document the geochemical makeup of dust reaching continental West Antarctica, on late Holocene samples from the Siple Dome A ice core (spanning ∼1030-1800 C.E). The Nd-Sr isotope signature is unusual for Antarctic ice core dust samples. Siple Dome data are characterized by low Nd isotope ratios (as low as εNd = -16.3) along with low Sr isotope ratios (highest 87 Sr/ 86 Sr = 0.7102) compared with other Antarctic dust signatures. A well-defined inverse correlation between Sr-Nd isotope ratios indicates two primary mixing sources. The low εNd-values indicate involvement of ancient (Archean-to-early Proterozoic) continental crust, as either the direct source or as a precursor of the source, and the low Sr-values require low Rb/Sr ratios that often reflect high-grade metamorphism. The known Antarctic terrane with these characteristics is parts of Enderby Land, nearly at the opposite end of Antarctica. The isotopic signature of the second end-member is compatible with West Antarctic volcanoes or Patagonia in South America. The Sr-Nd isotopes and trace element abundances are also chemically compatible with mixing between volcanic material from Gaussberg, a small lamproite volcano in Kaiser Wilhelm II Land in coastal East Antarctica whose source is ancient lithospheric mantle, with dust from Patagonia or material from West Antarctic volcanoes. We assess these potential mixing scenarios and conclude that Siple Dome's unusual geochemical signature can best be explained by a mixture of Patagonian dust and a Gaussberg-like source, with additional minor contributions from old eroded Archean-to-early Proterozoic bedrock sources such as those in Enderby Land. Moreover, Siple Dome dust compositions are distinct from dust deposited on Taylor and Clark Glaciers in the McMurdo Dry Valleys of the western Ross Sea, precluding the Dry Valleys as a late ... |
author2 |
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) |
format |
Article in Journal/Newspaper |
author |
Koffman, Bess G. Goldstein, Steven L. Winckler, Gisela Kaplan, Michael R. Kreutz, Karl J. Bolge, Louise Bory, Aloys Biscaye, Pierre |
author_facet |
Koffman, Bess G. Goldstein, Steven L. Winckler, Gisela Kaplan, Michael R. Kreutz, Karl J. Bolge, Louise Bory, Aloys Biscaye, Pierre |
author_sort |
Koffman, Bess G. |
title |
Late Holocene dust provenance at Siple Dome, Antarctica |
title_short |
Late Holocene dust provenance at Siple Dome, Antarctica |
title_full |
Late Holocene dust provenance at Siple Dome, Antarctica |
title_fullStr |
Late Holocene dust provenance at Siple Dome, Antarctica |
title_full_unstemmed |
Late Holocene dust provenance at Siple Dome, Antarctica |
title_sort |
late holocene dust provenance at siple dome, antarctica |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03664859 https://doi.org/10.1016/j.quascirev.2021.107271 |
long_lat |
ENVELOPE(89.183,89.183,-66.800,-66.800) ENVELOPE(89.500,89.500,-66.833,-66.833) ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-148.833,-148.833,-81.667,-81.667) ENVELOPE(90.000,90.000,-67.000,-67.000) |
geographic |
Antarctic East Antarctica Gaussberg Kaiser-Wilhelm-II.-Land McMurdo Dry Valleys Patagonia Ross Sea Siple Siple Dome Southern Ocean West Antarctica Wilhelm II Land |
geographic_facet |
Antarctic East Antarctica Gaussberg Kaiser-Wilhelm-II.-Land McMurdo Dry Valleys Patagonia Ross Sea Siple Siple Dome Southern Ocean West Antarctica Wilhelm II Land |
genre |
Antarc* Antarctic Antarctica East Antarctica Enderby Land ice core Kaiser Wilhelm II land McMurdo Dry Valleys Ross Sea Southern Ocean West Antarctica Wilhelm II Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Enderby Land ice core Kaiser Wilhelm II land McMurdo Dry Valleys Ross Sea Southern Ocean West Antarctica Wilhelm II Land |
op_source |
Quaternary Science Reviews https://hal-insu.archives-ouvertes.fr/insu-03664859 Quaternary Science Reviews, 2021, 274, ⟨10.1016/j.quascirev.2021.107271⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2021.107271 insu-03664859 https://hal-insu.archives-ouvertes.fr/insu-03664859 BIBCODE: 2021QSRv.27407271K doi:10.1016/j.quascirev.2021.107271 |
op_doi |
https://doi.org/10.1016/j.quascirev.2021.107271 |
container_title |
Quaternary Science Reviews |
container_volume |
274 |
container_start_page |
107271 |
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1766273412846583808 |