A Sr-Nd-Hf isotope characterization of dust source areas in Victoria Land and the McMurdo Sound sector of Antarctica
Determining the geographical provenance of dust provides crucial insight into the global dust cycle. For the East Antarctic Ice Sheet (EAIS), the importance of Southern hemisphere potential dust sources has been thoroughly investigated using radiogenic isotopes, whereas proximal dust source areas lo...
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Online Access: | http://hdl.handle.net/11568/791595 https://doi.org/10.1016/j.quascirev.2016.03.023 http://www.sciencedirect.com/science/article/pii/S0277379116300890 |
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ftunivpisairis:oai:arpi.unipi.it:11568/791595 2024-01-28T10:00:32+01:00 A Sr-Nd-Hf isotope characterization of dust source areas in Victoria Land and the McMurdo Sound sector of Antarctica Blakowski, Molly A. Aciego, Sarah M. Delmonte, Barbara BARONI, CARLO SALVATORE, MARIA CRISTINA Sims, Kenneth W. W. Blakowski, Molly A. Aciego, Sarah M. Delmonte, Barbara Baroni, Carlo Salvatore, MARIA CRISTINA Sims, Kenneth W. W. 2016 STAMPA http://hdl.handle.net/11568/791595 https://doi.org/10.1016/j.quascirev.2016.03.023 http://www.sciencedirect.com/science/article/pii/S0277379116300890 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000376699800003 volume:141 firstpage:26 lastpage:37 numberofpages:12 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11568/791595 doi:10.1016/j.quascirev.2016.03.023 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84962829480 http://www.sciencedirect.com/science/article/pii/S0277379116300890 info:eu-repo/semantics/restrictedAccess Dust Sr–Nd isotope Nd–Hf isotope Paleoclimate Victoria Land McMurdo Sound Antarctica info:eu-repo/semantics/article 2016 ftunivpisairis https://doi.org/10.1016/j.quascirev.2016.03.023 2024-01-03T18:00:25Z Determining the geographical provenance of dust provides crucial insight into the global dust cycle. For the East Antarctic Ice Sheet (EAIS), the importance of Southern hemisphere potential dust sources has been thoroughly investigated using radiogenic isotopes, whereas proximal dust source areas located on the periphery of the ice sheet remain poorly documented from a geochemical standpoint. In this work, we expand the existing isotopic (Srsingle bondNd) catalogue of dust and sand-sized sediments from Victoria Land and the McMurdo Sound sector, and incorporate Hf isotopic data to place additional constraints on dust source identification. The isotopic field for materials considered in this study is characterized by 87Sr/86Sr ratios ranging from 0.703 to 0.783, εNd between −12.01 and 6.36, and εHf from −16.77 to 6.89. As reported in previous works, the data reveal close relationships between Antarctic sediments and distinct parent lithologies; in addition, our findings emphasize the background presence of very fine dusts originating from dominant global sources and regional volcanic activity as barriers to direct source-to-sink comparison of isotopic signatures. Thus, geochemical characterizations of dust sources to the Antarctic ice sheet involving multiple size fractions, including coarser-grained particles more susceptible to short-range transport, can help us to rule out global sources of dust when examining local sediment cores and ice cores. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet McMurdo Sound Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Antarctic East Antarctic Ice Sheet McMurdo Sound The Antarctic Victoria Land Quaternary Science Reviews 141 26 37 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Dust Sr–Nd isotope Nd–Hf isotope Paleoclimate Victoria Land McMurdo Sound Antarctica |
spellingShingle |
Dust Sr–Nd isotope Nd–Hf isotope Paleoclimate Victoria Land McMurdo Sound Antarctica Blakowski, Molly A. Aciego, Sarah M. Delmonte, Barbara BARONI, CARLO SALVATORE, MARIA CRISTINA Sims, Kenneth W. W. A Sr-Nd-Hf isotope characterization of dust source areas in Victoria Land and the McMurdo Sound sector of Antarctica |
topic_facet |
Dust Sr–Nd isotope Nd–Hf isotope Paleoclimate Victoria Land McMurdo Sound Antarctica |
description |
Determining the geographical provenance of dust provides crucial insight into the global dust cycle. For the East Antarctic Ice Sheet (EAIS), the importance of Southern hemisphere potential dust sources has been thoroughly investigated using radiogenic isotopes, whereas proximal dust source areas located on the periphery of the ice sheet remain poorly documented from a geochemical standpoint. In this work, we expand the existing isotopic (Srsingle bondNd) catalogue of dust and sand-sized sediments from Victoria Land and the McMurdo Sound sector, and incorporate Hf isotopic data to place additional constraints on dust source identification. The isotopic field for materials considered in this study is characterized by 87Sr/86Sr ratios ranging from 0.703 to 0.783, εNd between −12.01 and 6.36, and εHf from −16.77 to 6.89. As reported in previous works, the data reveal close relationships between Antarctic sediments and distinct parent lithologies; in addition, our findings emphasize the background presence of very fine dusts originating from dominant global sources and regional volcanic activity as barriers to direct source-to-sink comparison of isotopic signatures. Thus, geochemical characterizations of dust sources to the Antarctic ice sheet involving multiple size fractions, including coarser-grained particles more susceptible to short-range transport, can help us to rule out global sources of dust when examining local sediment cores and ice cores. |
author2 |
Blakowski, Molly A. Aciego, Sarah M. Delmonte, Barbara Baroni, Carlo Salvatore, MARIA CRISTINA Sims, Kenneth W. W. |
format |
Article in Journal/Newspaper |
author |
Blakowski, Molly A. Aciego, Sarah M. Delmonte, Barbara BARONI, CARLO SALVATORE, MARIA CRISTINA Sims, Kenneth W. W. |
author_facet |
Blakowski, Molly A. Aciego, Sarah M. Delmonte, Barbara BARONI, CARLO SALVATORE, MARIA CRISTINA Sims, Kenneth W. W. |
author_sort |
Blakowski, Molly A. |
title |
A Sr-Nd-Hf isotope characterization of dust source areas in Victoria Land and the McMurdo Sound sector of Antarctica |
title_short |
A Sr-Nd-Hf isotope characterization of dust source areas in Victoria Land and the McMurdo Sound sector of Antarctica |
title_full |
A Sr-Nd-Hf isotope characterization of dust source areas in Victoria Land and the McMurdo Sound sector of Antarctica |
title_fullStr |
A Sr-Nd-Hf isotope characterization of dust source areas in Victoria Land and the McMurdo Sound sector of Antarctica |
title_full_unstemmed |
A Sr-Nd-Hf isotope characterization of dust source areas in Victoria Land and the McMurdo Sound sector of Antarctica |
title_sort |
sr-nd-hf isotope characterization of dust source areas in victoria land and the mcmurdo sound sector of antarctica |
publishDate |
2016 |
url |
http://hdl.handle.net/11568/791595 https://doi.org/10.1016/j.quascirev.2016.03.023 http://www.sciencedirect.com/science/article/pii/S0277379116300890 |
geographic |
Antarctic East Antarctic Ice Sheet McMurdo Sound The Antarctic Victoria Land |
geographic_facet |
Antarctic East Antarctic Ice Sheet McMurdo Sound The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica Ice Sheet McMurdo Sound Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet McMurdo Sound Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000376699800003 volume:141 firstpage:26 lastpage:37 numberofpages:12 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11568/791595 doi:10.1016/j.quascirev.2016.03.023 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84962829480 http://www.sciencedirect.com/science/article/pii/S0277379116300890 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2016.03.023 |
container_title |
Quaternary Science Reviews |
container_volume |
141 |
container_start_page |
26 |
op_container_end_page |
37 |
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1789324990754062336 |