Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica)
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 1...
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Copernicus Publications
2021
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Online Access: | https://doi.org/10.5194/tc-15-4807-2021 https://tc.copernicus.org/articles/15/4807/2021/tc-15-4807-2021.pdf https://doaj.org/article/dca1094b02c84315a430aa9e0a4383b9 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:dca1094b02c84315a430aa9e0a4383b9 2023-05-15T13:47:19+02:00 Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica) G. Baccolo B. Delmonte E. Di Stefano G. Cibin I. Crotti M. Frezzotti D. Hampai Y. Iizuka A. Marcelli V. Maggi 2021-10-01 https://doi.org/10.5194/tc-15-4807-2021 https://tc.copernicus.org/articles/15/4807/2021/tc-15-4807-2021.pdf https://doaj.org/article/dca1094b02c84315a430aa9e0a4383b9 en eng Copernicus Publications doi:10.5194/tc-15-4807-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/4807/2021/tc-15-4807-2021.pdf https://doaj.org/article/dca1094b02c84315a430aa9e0a4383b9 undefined The Cryosphere, Vol 15, Pp 4807-4822 (2021) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/tc-15-4807-2021 2023-01-22T19:27:36Z 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. Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core Ross Sea The Cryosphere Unknown East Antarctica Ross Sea Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) The Cryosphere 15 10 4807 4822 |
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language |
English |
topic |
geo envir |
spellingShingle |
geo envir G. Baccolo B. Delmonte E. Di Stefano G. Cibin I. Crotti M. Frezzotti D. Hampai Y. Iizuka A. Marcelli V. Maggi Deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica) |
topic_facet |
geo envir |
description |
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. |
format |
Article in Journal/Newspaper |
author |
G. Baccolo B. Delmonte E. Di Stefano G. Cibin I. Crotti M. Frezzotti D. Hampai Y. Iizuka A. Marcelli V. Maggi |
author_facet |
G. Baccolo B. Delmonte E. Di Stefano G. Cibin I. Crotti M. Frezzotti D. Hampai Y. Iizuka A. Marcelli V. Maggi |
author_sort |
G. Baccolo |
title |
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_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_sort |
deep ice as a geochemical reactor: insights from iron speciation and mineralogy of dust in the talos dome ice core (east antarctica) |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-4807-2021 https://tc.copernicus.org/articles/15/4807/2021/tc-15-4807-2021.pdf https://doaj.org/article/dca1094b02c84315a430aa9e0a4383b9 |
long_lat |
ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
East Antarctica Ross Sea Talos Dome |
geographic_facet |
East Antarctica Ross Sea Talos Dome |
genre |
Antarc* Antarctica East Antarctica ice core Ross Sea The Cryosphere |
genre_facet |
Antarc* Antarctica East Antarctica ice core Ross Sea The Cryosphere |
op_source |
The Cryosphere, Vol 15, Pp 4807-4822 (2021) |
op_relation |
doi:10.5194/tc-15-4807-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/4807/2021/tc-15-4807-2021.pdf https://doaj.org/article/dca1094b02c84315a430aa9e0a4383b9 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-15-4807-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
10 |
container_start_page |
4807 |
op_container_end_page |
4822 |
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1766246881487224832 |