Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars
Many interpretations have been proposed to explain the presence of jarosite within Martian surficial sediments, including the possibility that it precipitated within paleo-ice deposits owing to englacial weathering of dust. However, until now a similar geochemical process was not observed on Earth n...
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Online Access: | http://hdl.handle.net/10281/299969 https://doi.org/10.1038/s41467-020-20705-z |
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ftunivmilanobic:oai:boa.unimib.it:10281/299969 2024-02-04T09:56:01+01:00 Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars Baccolo, Giovanni Delmonte, Barbara Niles, P B Cibin, Giannantonio Di Stefano, Elena Hampai, Dariush Keller, Lindsay Maggi, Valter Marcelli, Augusto Michalski, Joseph Snead, Christopher Frezzotti, Massimo Baccolo, G Delmonte, B Niles, P Cibin, G Di Stefano, E Hampai, D Keller, L Maggi, V Marcelli, A Michalski, J Snead, C Frezzotti, M 2021 http://hdl.handle.net/10281/299969 https://doi.org/10.1038/s41467-020-20705-z eng eng Nature Publishing Group country:GB info:eu-repo/semantics/altIdentifier/pmid/33469027 info:eu-repo/semantics/altIdentifier/wos/WOS:000613518600004 volume:12 issue:1 journal:NATURE COMMUNICATIONS http://hdl.handle.net/10281/299969 doi:10.1038/s41467-020-20705-z info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85099563694 info:eu-repo/semantics/openAccess Antarctica ice core Planetary sciences Mars Jarosite mineral dust info:eu-repo/semantics/article 2021 ftunivmilanobic https://doi.org/10.1038/s41467-020-20705-z 2024-01-09T23:31:50Z Many interpretations have been proposed to explain the presence of jarosite within Martian surficial sediments, including the possibility that it precipitated within paleo-ice deposits owing to englacial weathering of dust. However, until now a similar geochemical process was not observed on Earth nor in other planetary settings. We report a multi-analytical indication of jarosite formation within deep ice. Below 1000 m depth, jarosite crystals adhering on residual silica-rich particles have been identified in the Talos Dome ice core (East Antarctica) and interpreted as products of weathering involving aeolian dust and acidic atmospheric aerosols. The progressive increase of ice metamorphism and re-crystallization with depth, favours the relocation and concentration of dust and the formation of acidic brines in isolated environments, allowing chemical reactions and mineral neo-formation to occur. This is the first described englacial diagenetic mechanism occurring in deep Antarctic ice and supports the ice-weathering model for jarosite formation on Mars, highlighting the geologic importance of paleo ice-related processes on this planet. Additional implications concern the preservation of dust-related signals in deep ice cores with respect to paleoclimatic reconstructions and the englacial history of meteorites from Antarctic blue ice fields. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) Antarctic East Antarctica Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Nature Communications 12 1 |
institution |
Open Polar |
collection |
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
op_collection_id |
ftunivmilanobic |
language |
English |
topic |
Antarctica ice core Planetary sciences Mars Jarosite mineral dust |
spellingShingle |
Antarctica ice core Planetary sciences Mars Jarosite mineral dust Baccolo, Giovanni Delmonte, Barbara Niles, P B Cibin, Giannantonio Di Stefano, Elena Hampai, Dariush Keller, Lindsay Maggi, Valter Marcelli, Augusto Michalski, Joseph Snead, Christopher Frezzotti, Massimo Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars |
topic_facet |
Antarctica ice core Planetary sciences Mars Jarosite mineral dust |
description |
Many interpretations have been proposed to explain the presence of jarosite within Martian surficial sediments, including the possibility that it precipitated within paleo-ice deposits owing to englacial weathering of dust. However, until now a similar geochemical process was not observed on Earth nor in other planetary settings. We report a multi-analytical indication of jarosite formation within deep ice. Below 1000 m depth, jarosite crystals adhering on residual silica-rich particles have been identified in the Talos Dome ice core (East Antarctica) and interpreted as products of weathering involving aeolian dust and acidic atmospheric aerosols. The progressive increase of ice metamorphism and re-crystallization with depth, favours the relocation and concentration of dust and the formation of acidic brines in isolated environments, allowing chemical reactions and mineral neo-formation to occur. This is the first described englacial diagenetic mechanism occurring in deep Antarctic ice and supports the ice-weathering model for jarosite formation on Mars, highlighting the geologic importance of paleo ice-related processes on this planet. Additional implications concern the preservation of dust-related signals in deep ice cores with respect to paleoclimatic reconstructions and the englacial history of meteorites from Antarctic blue ice fields. |
author2 |
Baccolo, G Delmonte, B Niles, P Cibin, G Di Stefano, E Hampai, D Keller, L Maggi, V Marcelli, A Michalski, J Snead, C Frezzotti, M |
format |
Article in Journal/Newspaper |
author |
Baccolo, Giovanni Delmonte, Barbara Niles, P B Cibin, Giannantonio Di Stefano, Elena Hampai, Dariush Keller, Lindsay Maggi, Valter Marcelli, Augusto Michalski, Joseph Snead, Christopher Frezzotti, Massimo |
author_facet |
Baccolo, Giovanni Delmonte, Barbara Niles, P B Cibin, Giannantonio Di Stefano, Elena Hampai, Dariush Keller, Lindsay Maggi, Valter Marcelli, Augusto Michalski, Joseph Snead, Christopher Frezzotti, Massimo |
author_sort |
Baccolo, Giovanni |
title |
Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars |
title_short |
Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars |
title_full |
Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars |
title_fullStr |
Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars |
title_full_unstemmed |
Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars |
title_sort |
jarosite formation in deep antarctic ice provides a window into acidic, water-limited weathering on mars |
publisher |
Nature Publishing Group |
publishDate |
2021 |
url |
http://hdl.handle.net/10281/299969 https://doi.org/10.1038/s41467-020-20705-z |
long_lat |
ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Antarctic East Antarctica Talos Dome |
geographic_facet |
Antarctic East Antarctica Talos Dome |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/33469027 info:eu-repo/semantics/altIdentifier/wos/WOS:000613518600004 volume:12 issue:1 journal:NATURE COMMUNICATIONS http://hdl.handle.net/10281/299969 doi:10.1038/s41467-020-20705-z info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85099563694 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-020-20705-z |
container_title |
Nature Communications |
container_volume |
12 |
container_issue |
1 |
_version_ |
1789960341015232512 |