Magnetization of polar ice: a measurement of terrestrial dust and extraterrestrial fallout
Laboratory-induced remanent magnetization of polar ice constitutes a measurement of the magnetization carried by the ferromagnetic dust particles in the ice. This non-destructive technique provides a novel kind of information on the dust deposited on the surface of polar ice sheets. Measurements mad...
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Online Access: | http://hdl.handle.net/11576/2513530 https://doi.org/10.1016/j.quascirev.2011.11.023 |
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ftunivurbino:oai:ora.uniurb.it:11576/2513530 2024-04-14T08:01:30+00:00 Magnetization of polar ice: a measurement of terrestrial dust and extraterrestrial fallout LANCI, LUCA B. Delmonte D. V. Kent V. Maggi P. E. Biscaye J. R. Petit Lanci, Luca B., Delmonte D. V., Kent V., Maggi P. E., Biscaye J. R., Petit 2012 STAMPA http://hdl.handle.net/11576/2513530 https://doi.org/10.1016/j.quascirev.2011.11.023 eng eng info:eu-repo/semantics/altIdentifier/wos/000300926700003 volume:33 firstpage:20 lastpage:31 numberofpages:12 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11576/2513530 doi:10.1016/j.quascirev.2011.11.023 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84856214017 info:eu-repo/semantics/article 2012 ftunivurbino https://doi.org/10.1016/j.quascirev.2011.11.023 2024-03-21T17:01:51Z Laboratory-induced remanent magnetization of polar ice constitutes a measurement of the magnetization carried by the ferromagnetic dust particles in the ice. This non-destructive technique provides a novel kind of information on the dust deposited on the surface of polar ice sheets. Measurements made on ice samples from Greenland (North GRIP ice core) and Antarctica (Vostok and EPICA-Dome C ice cores) allowed the recognition of a fraction of magnetic minerals in ice whose concentration and magnetic properties are directly related to that of insoluble dust. The source of this fraction of magnetic minerals thus appears closely related to terrestrial dust transport and deposition and its magnetic properties are informative of the dust provenance areas. The rock-magnetic properties of the dust may reflect distinct changes of dust source areas from glacial to interglacial periods in agreement with and adding further information to the isotopic (87Sr/86Sr and 143Nd/144Nd) analyses. A second magnetic fraction consists of particles of nanometric size, which are superparamagnetic at freezer temperature and whose concen- tration is independent of the mass of aerosol dust found in the ice. The source of these nanometric-sized magnetic particles is ascribed to fallout of “meteoric smoke” and their concentration in ice was found to be compatible with the extraterrestrial fallout inferred from Ir concentrations. The diameter of the smoke particles as inferred from magnetic measurements is in the range of about 7-20 nm. Article in Journal/Newspaper Antarc* Antarctica EPICA Greenland GRIP ice core Università degli Studi di Urbino: CINECA IRIS Greenland Quaternary Science Reviews 33 20 31 |
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Open Polar |
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Università degli Studi di Urbino: CINECA IRIS |
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ftunivurbino |
language |
English |
description |
Laboratory-induced remanent magnetization of polar ice constitutes a measurement of the magnetization carried by the ferromagnetic dust particles in the ice. This non-destructive technique provides a novel kind of information on the dust deposited on the surface of polar ice sheets. Measurements made on ice samples from Greenland (North GRIP ice core) and Antarctica (Vostok and EPICA-Dome C ice cores) allowed the recognition of a fraction of magnetic minerals in ice whose concentration and magnetic properties are directly related to that of insoluble dust. The source of this fraction of magnetic minerals thus appears closely related to terrestrial dust transport and deposition and its magnetic properties are informative of the dust provenance areas. The rock-magnetic properties of the dust may reflect distinct changes of dust source areas from glacial to interglacial periods in agreement with and adding further information to the isotopic (87Sr/86Sr and 143Nd/144Nd) analyses. A second magnetic fraction consists of particles of nanometric size, which are superparamagnetic at freezer temperature and whose concen- tration is independent of the mass of aerosol dust found in the ice. The source of these nanometric-sized magnetic particles is ascribed to fallout of “meteoric smoke” and their concentration in ice was found to be compatible with the extraterrestrial fallout inferred from Ir concentrations. The diameter of the smoke particles as inferred from magnetic measurements is in the range of about 7-20 nm. |
author2 |
Lanci, Luca B., Delmonte D. V., Kent V., Maggi P. E., Biscaye J. R., Petit |
format |
Article in Journal/Newspaper |
author |
LANCI, LUCA B. Delmonte D. V. Kent V. Maggi P. E. Biscaye J. R. Petit |
spellingShingle |
LANCI, LUCA B. Delmonte D. V. Kent V. Maggi P. E. Biscaye J. R. Petit Magnetization of polar ice: a measurement of terrestrial dust and extraterrestrial fallout |
author_facet |
LANCI, LUCA B. Delmonte D. V. Kent V. Maggi P. E. Biscaye J. R. Petit |
author_sort |
LANCI, LUCA |
title |
Magnetization of polar ice: a measurement of terrestrial dust and extraterrestrial fallout |
title_short |
Magnetization of polar ice: a measurement of terrestrial dust and extraterrestrial fallout |
title_full |
Magnetization of polar ice: a measurement of terrestrial dust and extraterrestrial fallout |
title_fullStr |
Magnetization of polar ice: a measurement of terrestrial dust and extraterrestrial fallout |
title_full_unstemmed |
Magnetization of polar ice: a measurement of terrestrial dust and extraterrestrial fallout |
title_sort |
magnetization of polar ice: a measurement of terrestrial dust and extraterrestrial fallout |
publishDate |
2012 |
url |
http://hdl.handle.net/11576/2513530 https://doi.org/10.1016/j.quascirev.2011.11.023 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica EPICA Greenland GRIP ice core |
genre_facet |
Antarc* Antarctica EPICA Greenland GRIP ice core |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000300926700003 volume:33 firstpage:20 lastpage:31 numberofpages:12 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11576/2513530 doi:10.1016/j.quascirev.2011.11.023 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84856214017 |
op_doi |
https://doi.org/10.1016/j.quascirev.2011.11.023 |
container_title |
Quaternary Science Reviews |
container_volume |
33 |
container_start_page |
20 |
op_container_end_page |
31 |
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1796309323594334208 |