Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica)
<p>Thanks to its insolubility, mineral dust is considered a stable proxy in polar ice cores. With this study we show that the Talos Dome ice core (TALDICE, Ross Sea sector of East Antarctica) displays evident and progressive signs of post-depositional processes affecting the mineral dust recor...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-10-01
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| Series: | The Cryosphere |
| Online Access: | https://tc.copernicus.org/articles/15/4807/2021/tc-15-4807-2021.pdf |
| _version_ | 1818901386336665600 |
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| author | G. Baccolo G. Baccolo B. Delmonte E. Di Stefano E. Di Stefano E. Di Stefano G. Cibin I. Crotti I. Crotti M. Frezzotti D. Hampai Y. Iizuka A. Marcelli A. Marcelli V. Maggi V. Maggi |
| author_facet | G. Baccolo G. Baccolo B. Delmonte E. Di Stefano E. Di Stefano E. Di Stefano G. Cibin I. Crotti I. Crotti M. Frezzotti D. Hampai Y. Iizuka A. Marcelli A. Marcelli V. Maggi V. Maggi |
| author_sort | G. Baccolo |
| collection | DOAJ |
| description | <p>Thanks to its insolubility, mineral dust is considered a stable proxy in polar ice cores. With this study we show that the Talos Dome ice core (TALDICE, Ross Sea sector of East Antarctica) displays evident and
progressive signs of post-depositional processes affecting the mineral dust
record below 1000 m deep. We apply a suite of established and cutting-edge
techniques to investigate the properties of dust in TALDICE, ranging from
concentration and grain size to elemental composition and Fe mineralogy.
Results show that through acidic/oxidative weathering, the conditions of deep ice at Talos Dome promote the dissolution of specific minerals and the englacial formation of others, affecting primitive dust features. The expulsion of acidic atmospheric species from ice grains and their concentration in localized environments is likely the main process
responsible for englacial reactions. Deep ice can be seen as a “geochemical reactor” capable of fostering complex reactions which involve both soluble and insoluble impurities. Fe-bearing minerals can efficiently help in exploring such transformations.</p> |
| first_indexed | 2024-12-19T20:18:56Z |
| format | Article |
| id | doaj.art-dca1094b02c84315a430aa9e0a4383b9 |
| institution | Directory Open Access Journal |
| issn | 1994-0416 1994-0424 |
| language | English |
| last_indexed | 2024-12-19T20:18:56Z |
| publishDate | 2021-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The Cryosphere |
| spelling | doaj.art-dca1094b02c84315a430aa9e0a4383b92022-12-21T20:07:05ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242021-10-01154807482210.5194/tc-15-4807-2021Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica)G. Baccolo0G. Baccolo1B. Delmonte2E. Di Stefano3E. Di Stefano4E. Di Stefano5G. Cibin6I. Crotti7I. Crotti8M. Frezzotti9D. Hampai10Y. Iizuka11A. Marcelli12A. Marcelli13V. Maggi14V. Maggi15Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, ItalyMilano-Bicocca Section, Istituto Nazionale di Fisica Nucleare, Milan, ItalyDepartment of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, ItalyDepartment of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, ItalyMilano-Bicocca Section, Istituto Nazionale di Fisica Nucleare, Milan, ItalyDepartment of Physical Sciences, Earth and Environment, University of Siena, Siena, ItalyDiamond Light Source, Harwell Science and Innovation Campus, Didcot, UKDepartment of Environmental Sciences, Informatics and Statistics, Ca' Foscari University of Venice, Venice, ItalyLaboratoire des Sciences du Climat et de l'Environnement IPSL, CEA-CNRS-UVSQ, Gif-sur-Yvette, FranceDepartment of Science, Roma Tre University, Rome, ItalyLaboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Frascati, ItalyInstitute of Low Temperature Science, Hokkaido University, Sapporo, JapanLaboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Frascati, ItalyRome International Center for Materials Science – Superstripes, Rome, ItalyDepartment of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, ItalyMilano-Bicocca Section, Istituto Nazionale di Fisica Nucleare, Milan, Italy<p>Thanks to its insolubility, mineral dust is considered a stable proxy in polar ice cores. With this study we show that the Talos Dome ice core (TALDICE, Ross Sea sector of East Antarctica) displays evident and progressive signs of post-depositional processes affecting the mineral dust record below 1000 m deep. We apply a suite of established and cutting-edge techniques to investigate the properties of dust in TALDICE, ranging from concentration and grain size to elemental composition and Fe mineralogy. Results show that through acidic/oxidative weathering, the conditions of deep ice at Talos Dome promote the dissolution of specific minerals and the englacial formation of others, affecting primitive dust features. The expulsion of acidic atmospheric species from ice grains and their concentration in localized environments is likely the main process responsible for englacial reactions. Deep ice can be seen as a “geochemical reactor” capable of fostering complex reactions which involve both soluble and insoluble impurities. Fe-bearing minerals can efficiently help in exploring such transformations.</p>https://tc.copernicus.org/articles/15/4807/2021/tc-15-4807-2021.pdf |
| spellingShingle | G. Baccolo G. Baccolo B. Delmonte E. Di Stefano E. Di Stefano E. Di Stefano G. Cibin I. Crotti I. Crotti M. Frezzotti D. Hampai Y. Iizuka A. Marcelli A. Marcelli V. Maggi V. Maggi Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica) The Cryosphere |
| title | Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica) |
| title_full | Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica) |
| title_fullStr | Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica) |
| title_full_unstemmed | Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica) |
| title_short | Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica) |
| title_sort | deep ice as a geochemical reactor insights from iron speciation and mineralogy of dust in the talos dome ice core east antarctica |
| url | https://tc.copernicus.org/articles/15/4807/2021/tc-15-4807-2021.pdf |
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