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...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , , , , |
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | http://hdl.handle.net/11590/396097 https://doi.org/10.5194/tc-15-4807-2021 |
id |
ftunivroma3iris:oai:iris.uniroma3.it:11590/396097 |
---|---|
record_format |
openpolar |
spelling |
ftunivroma3iris:oai:iris.uniroma3.it:11590/396097 2024-05-12T07:54:38+00:00 Deep ice as a geochemical reactor: Insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica) Baccolo G. Delmonte B. Di Stefano E. Cibin G. Crotti I. Frezzotti M. Hampai D. Iizuka Y. Marcelli A. Maggi V. Baccolo, G. Delmonte, B. Di Stefano, E. Cibin, G. Crotti, I. Frezzotti, M. Hampai, D. Iizuka, Y. Marcelli, A. Maggi, V. 2021 http://hdl.handle.net/11590/396097 https://doi.org/10.5194/tc-15-4807-2021 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000708953100001 volume:15 issue:10 firstpage:4807 lastpage:4822 numberofpages:16 journal:THE CRYOSPHERE http://hdl.handle.net/11590/396097 doi:10.5194/tc-15-4807-2021 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85117110217 info:eu-repo/semantics/openAccess info:eu-repo/semantics/article 2021 ftunivroma3iris https://doi.org/10.5194/tc-15-4807-2021 2024-04-16T01:59:16Z 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 1000g 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 Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) 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 |
Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) |
op_collection_id |
ftunivroma3iris |
language |
English |
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 1000g 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. |
author2 |
Baccolo, G. Delmonte, B. Di Stefano, E. Cibin, G. Crotti, I. Frezzotti, M. Hampai, D. Iizuka, Y. Marcelli, A. Maggi, V. |
format |
Article in Journal/Newspaper |
author |
Baccolo G. Delmonte B. Di Stefano E. Cibin G. Crotti I. Frezzotti M. Hampai D. Iizuka Y. Marcelli A. Maggi V. |
spellingShingle |
Baccolo G. Delmonte B. Di Stefano E. Cibin G. Crotti I. Frezzotti M. Hampai D. Iizuka Y. Marcelli A. Maggi V. Deep ice as a geochemical reactor: Insights from iron speciation and mineralogy of dust in the Talos Dome ice core (East Antarctica) |
author_facet |
Baccolo G. Delmonte B. Di Stefano E. Cibin G. Crotti I. Frezzotti M. Hampai D. Iizuka Y. Marcelli A. Maggi V. |
author_sort |
Baccolo G. |
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) |
publishDate |
2021 |
url |
http://hdl.handle.net/11590/396097 https://doi.org/10.5194/tc-15-4807-2021 |
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 |
genre_facet |
Antarc* Antarctica East Antarctica ice core Ross Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000708953100001 volume:15 issue:10 firstpage:4807 lastpage:4822 numberofpages:16 journal:THE CRYOSPHERE http://hdl.handle.net/11590/396097 doi:10.5194/tc-15-4807-2021 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85117110217 |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
_version_ |
1798850907703607296 |