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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ftdoajarticles:oai:doaj.org/article:dca1094b02c84315a430aa9e0a4383b9 2023-05-15T13:42:06+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 2021-10-01T00:00:00Z https://doi.org/10.5194/tc-15-4807-2021 https://doaj.org/article/dca1094b02c84315a430aa9e0a4383b9 EN eng Copernicus Publications https://tc.copernicus.org/articles/15/4807/2021/tc-15-4807-2021.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-15-4807-2021 1994-0416 1994-0424 https://doaj.org/article/dca1094b02c84315a430aa9e0a4383b9 The Cryosphere, Vol 15, Pp 4807-4822 (2021) Environmental sciences GE1-350 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.5194/tc-15-4807-2021 2022-12-31T10:09:21Z 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 Directory of Open Access Journals: DOAJ Articles East Antarctica Ross Sea Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) The Cryosphere 15 10 4807 4822 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 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 |
Environmental sciences GE1-350 Geology QE1-996.5 |
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://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 |
https://tc.copernicus.org/articles/15/4807/2021/tc-15-4807-2021.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-15-4807-2021 1994-0416 1994-0424 https://doaj.org/article/dca1094b02c84315a430aa9e0a4383b9 |
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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1766162653490708480 |