Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman Spectroscopy
Abstract We analyzed the single‐grain mineralogical composition of aeolian dust transported to central East Antarctica for provenance purposes. Comparison with data from the last glacial period shows for the first time disappearance of carbonates during the Holocene related to sea level rise and sup...
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| Format: | Article |
| Language: | English |
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Wiley
2019-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2019GL083402 |
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| author | Chiara Ileana Paleari Barbara Delmonte Sergio Andò Eduardo Garzanti Jean Robert Petit Valter Maggi |
| author_facet | Chiara Ileana Paleari Barbara Delmonte Sergio Andò Eduardo Garzanti Jean Robert Petit Valter Maggi |
| author_sort | Chiara Ileana Paleari |
| collection | DOAJ |
| description | Abstract We analyzed the single‐grain mineralogical composition of aeolian dust transported to central East Antarctica for provenance purposes. Comparison with data from the last glacial period shows for the first time disappearance of carbonates during the Holocene related to sea level rise and suppressed deflation from the Argentinean continental shelf, exposed during Marine Isotope Stage 2. Zeolites, related to alteration of volcanic glass in the subglacial/periglacial environment of Patagonia, show a similar behavior. The remaining minerals, remarkably similar between the two climatic periods, are compatible with a Pampean and Patagonian provenance, but Holocene data show a more pronounced volcanic and metamorphic imprint and presence of minerals related to warm climate weathering environments compatible with an additional contribution from subtropical latitudes of South America. These results do not imply a major large‐scale reorganization of atmospheric circulation after the last climatic transition. |
| format | Article |
| id | doaj-art-d58ea06e795f4f42a6a69fe745eca4ec |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2019-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-d58ea06e795f4f42a6a69fe745eca4ec2025-08-20T03:13:22ZengWileyGeophysical Research Letters0094-82761944-80072019-08-0146169968997910.1029/2019GL083402Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman SpectroscopyChiara Ileana Paleari0Barbara Delmonte1Sergio Andò2Eduardo Garzanti3Jean Robert Petit4Valter Maggi5Laboratory for Provenance Studies, Department of Earth and Environmental Sciences University Milano‐Bicocca Milan ItalyLaboratory for Provenance Studies, Department of Earth and Environmental Sciences University Milano‐Bicocca Milan ItalyLaboratory for Provenance Studies, Department of Earth and Environmental Sciences University Milano‐Bicocca Milan ItalyLaboratory for Provenance Studies, Department of Earth and Environmental Sciences University Milano‐Bicocca Milan ItalyCNRS, IRD Université Grenoble Alpes Grenoble FranceLaboratory for Provenance Studies, Department of Earth and Environmental Sciences University Milano‐Bicocca Milan ItalyAbstract We analyzed the single‐grain mineralogical composition of aeolian dust transported to central East Antarctica for provenance purposes. Comparison with data from the last glacial period shows for the first time disappearance of carbonates during the Holocene related to sea level rise and suppressed deflation from the Argentinean continental shelf, exposed during Marine Isotope Stage 2. Zeolites, related to alteration of volcanic glass in the subglacial/periglacial environment of Patagonia, show a similar behavior. The remaining minerals, remarkably similar between the two climatic periods, are compatible with a Pampean and Patagonian provenance, but Holocene data show a more pronounced volcanic and metamorphic imprint and presence of minerals related to warm climate weathering environments compatible with an additional contribution from subtropical latitudes of South America. These results do not imply a major large‐scale reorganization of atmospheric circulation after the last climatic transition.https://doi.org/10.1029/2019GL083402ice coresdustAntarcticamineralogyprovenanceHolocene |
| spellingShingle | Chiara Ileana Paleari Barbara Delmonte Sergio Andò Eduardo Garzanti Jean Robert Petit Valter Maggi Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman Spectroscopy Geophysical Research Letters ice cores dust Antarctica mineralogy provenance Holocene |
| title | Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman Spectroscopy |
| title_full | Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman Spectroscopy |
| title_fullStr | Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman Spectroscopy |
| title_full_unstemmed | Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman Spectroscopy |
| title_short | Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman Spectroscopy |
| title_sort | aeolian dust provenance in central east antarctica during the holocene environmental constraints from single grain raman spectroscopy |
| topic | ice cores dust Antarctica mineralogy provenance Holocene |
| url | https://doi.org/10.1029/2019GL083402 |
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