Dust Deposition in N-E Antarctica: Mineralogical And Chemical Characterization
Mineral dust is a major source of micronutrients (e.g. Fe) in open oceans and HNLC zones. In the Southern Ocean in particular, the properties and impacts of current dust deposition are not well constrained. Here, several dust-bearing snow samples collected in the NE Antarctica coast are investigated...
Main Authors: | , , , , , , , , , , , |
---|---|
Other Authors: | |
Format: | Conference Object |
Language: | English |
Published: |
2015
|
Subjects: | |
Online Access: | http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/208375 |
id |
ftunivbruxelles:oai:dipot.ulb.ac.be:2013/208375 |
---|---|
record_format |
openpolar |
spelling |
ftunivbruxelles:oai:dipot.ulb.ac.be:2013/208375 2023-08-27T04:06:02+02:00 Dust Deposition in N-E Antarctica: Mineralogical And Chemical Characterization Vanderstraeten, Aubry Bonneville, Steeve Deboudt, Karine Flament, Pascal Schoemann, Véronique Grobéty, Bernard De Vleeschouwer, François Le Roux, Gaël Gieré, Reto Tison, Jean-Louis Debaille, Vinciane Mattielli, Nadine Goldchmidt Abstracts (2015: Pragues) 2015 No full-text files http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/208375 en eng http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/208375 Géologie et minéralogie Phénomènes atmosphériques info:eu-repo/semantics/conferencePoster info:ulb-repo/semantics/conferencePoster info:ulb-repo/semantics/openurl/document 2015 ftunivbruxelles 2023-08-09T22:23:11Z Mineral dust is a major source of micronutrients (e.g. Fe) in open oceans and HNLC zones. In the Southern Ocean in particular, the properties and impacts of current dust deposition are not well constrained. Here, several dust-bearing snow samples collected in the NE Antarctica coast are investigated in order to :(i) characterize the mineralogy, size, and morphology of dust by single particle analyses (automated-FEG-SEM-EDS and TEM-SAED), (ii) trace the origin and the relative contribution of natural and anthropogenic particles in dusts through elemental and multi-isotopic analyses (HR-ICP-MS and MC-ICP-MS) and (iii) quantify the Fe bioavailability in dusts (via extractions). Our first results show a fine size distribution (98% of particles < 5 µm, n=1550). A large fraction exhibits a Fe contribution, either from mineralogy or coating. While the mineralogy suggest a substantial contribution of proximal rocks, a high Pb enrichment factor (x7 relative to upper continental crust - UCC) indicates an anthropogenic contribution to the dust deposition. Overall, this study will improve our understanding of dust reaching the coast of NE-Antarctica, which may represent a proxy for the dust material supplied to the Southern Ocean, by far the largest HNLC. info:eu-repo/semantics/nonPublished Conference Object Antarc* Antarctica E. Antarctica Southern Ocean DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Southern Ocean |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Géologie et minéralogie Phénomènes atmosphériques |
spellingShingle |
Géologie et minéralogie Phénomènes atmosphériques Vanderstraeten, Aubry Bonneville, Steeve Deboudt, Karine Flament, Pascal Schoemann, Véronique Grobéty, Bernard De Vleeschouwer, François Le Roux, Gaël Gieré, Reto Tison, Jean-Louis Debaille, Vinciane Mattielli, Nadine Dust Deposition in N-E Antarctica: Mineralogical And Chemical Characterization |
topic_facet |
Géologie et minéralogie Phénomènes atmosphériques |
description |
Mineral dust is a major source of micronutrients (e.g. Fe) in open oceans and HNLC zones. In the Southern Ocean in particular, the properties and impacts of current dust deposition are not well constrained. Here, several dust-bearing snow samples collected in the NE Antarctica coast are investigated in order to :(i) characterize the mineralogy, size, and morphology of dust by single particle analyses (automated-FEG-SEM-EDS and TEM-SAED), (ii) trace the origin and the relative contribution of natural and anthropogenic particles in dusts through elemental and multi-isotopic analyses (HR-ICP-MS and MC-ICP-MS) and (iii) quantify the Fe bioavailability in dusts (via extractions). Our first results show a fine size distribution (98% of particles < 5 µm, n=1550). A large fraction exhibits a Fe contribution, either from mineralogy or coating. While the mineralogy suggest a substantial contribution of proximal rocks, a high Pb enrichment factor (x7 relative to upper continental crust - UCC) indicates an anthropogenic contribution to the dust deposition. Overall, this study will improve our understanding of dust reaching the coast of NE-Antarctica, which may represent a proxy for the dust material supplied to the Southern Ocean, by far the largest HNLC. info:eu-repo/semantics/nonPublished |
author2 |
Goldchmidt Abstracts (2015: Pragues) |
format |
Conference Object |
author |
Vanderstraeten, Aubry Bonneville, Steeve Deboudt, Karine Flament, Pascal Schoemann, Véronique Grobéty, Bernard De Vleeschouwer, François Le Roux, Gaël Gieré, Reto Tison, Jean-Louis Debaille, Vinciane Mattielli, Nadine |
author_facet |
Vanderstraeten, Aubry Bonneville, Steeve Deboudt, Karine Flament, Pascal Schoemann, Véronique Grobéty, Bernard De Vleeschouwer, François Le Roux, Gaël Gieré, Reto Tison, Jean-Louis Debaille, Vinciane Mattielli, Nadine |
author_sort |
Vanderstraeten, Aubry |
title |
Dust Deposition in N-E Antarctica: Mineralogical And Chemical Characterization |
title_short |
Dust Deposition in N-E Antarctica: Mineralogical And Chemical Characterization |
title_full |
Dust Deposition in N-E Antarctica: Mineralogical And Chemical Characterization |
title_fullStr |
Dust Deposition in N-E Antarctica: Mineralogical And Chemical Characterization |
title_full_unstemmed |
Dust Deposition in N-E Antarctica: Mineralogical And Chemical Characterization |
title_sort |
dust deposition in n-e antarctica: mineralogical and chemical characterization |
publishDate |
2015 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/208375 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica E. Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica E. Antarctica Southern Ocean |
op_relation |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/208375 |
_version_ |
1775346772383629312 |