Mineralogy and geochemistry of cryoconite sediments in Eqip Sermia glacier (Central-West Greenland)
The geochemical and mineralogical composition of cryoconite sediments on the Greenland Ice Sheet cap (Central-West Greenland) was investigated with the aim to characterize grain size, mineralogy and geochemistry of dark materials deposited on glacial surface. Cryoconite particles collected on the Eq...
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ftunivromaojs4:oai:rosa.uniroma1.it:article/16276 2023-05-15T16:20:58+02:00 Mineralogy and geochemistry of cryoconite sediments in Eqip Sermia glacier (Central-West Greenland) Sanna, Laura Romeo, Alessio 2018-09-06 application/pdf https://rosa.uniroma1.it/rosa04/mediterranean_earth_sciences/article/view/16276 eng eng SAPIENZA Università Editrice https://rosa.uniroma1.it/rosa04/mediterranean_earth_sciences/article/view/16276/15697 https://rosa.uniroma1.it/rosa04/mediterranean_earth_sciences/article/view/16276 Copyright (c) 2018 Journal of Mediterranean Earth Sciences Journal of Mediterranean Earth Sciences; V. 10 (2018) Journal of Mediterranean Earth Sciences; Vol. 10 (2018) 2280-6148 2037-2272 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivromaojs4 2021-05-13T08:52:40Z The geochemical and mineralogical composition of cryoconite sediments on the Greenland Ice Sheet cap (Central-West Greenland) was investigated with the aim to characterize grain size, mineralogy and geochemistry of dark materials deposited on glacial surface. Cryoconite particles collected on the Eqip Sermia glacier have angular-faceted, sharp-edged shape of the fine grains with mean size of 10-50 mm. The X-ray diffraction analysis of these cryoconite sediments shows that they mainly contain three silicate minerals (quartz, amphibole and plagioclase) and rare oxides, with slight variation in modal composition. Also X-ray fluorescence geochemical exploration reveals a similar pattern among samples. Trace elements content normalized to the averaged upper continental crust indicates values close to 1, except for a depletion in barium and enrichment in chromium. This average composition resembles the mean of weathered rocks in the surrounding area, indicating that dark material deposition was probably dominated by input of local geological outcrops around the glacier. Article in Journal/Newspaper glacier Greenland Ice Sheet Riviste Online SApienza - R.O.SA - 4 (Sapienza University of Rome) Eqip Sermia ENVELOPE(-50.067,-50.067,69.817,69.817) Greenland |
institution |
Open Polar |
collection |
Riviste Online SApienza - R.O.SA - 4 (Sapienza University of Rome) |
op_collection_id |
ftunivromaojs4 |
language |
English |
description |
The geochemical and mineralogical composition of cryoconite sediments on the Greenland Ice Sheet cap (Central-West Greenland) was investigated with the aim to characterize grain size, mineralogy and geochemistry of dark materials deposited on glacial surface. Cryoconite particles collected on the Eqip Sermia glacier have angular-faceted, sharp-edged shape of the fine grains with mean size of 10-50 mm. The X-ray diffraction analysis of these cryoconite sediments shows that they mainly contain three silicate minerals (quartz, amphibole and plagioclase) and rare oxides, with slight variation in modal composition. Also X-ray fluorescence geochemical exploration reveals a similar pattern among samples. Trace elements content normalized to the averaged upper continental crust indicates values close to 1, except for a depletion in barium and enrichment in chromium. This average composition resembles the mean of weathered rocks in the surrounding area, indicating that dark material deposition was probably dominated by input of local geological outcrops around the glacier. |
format |
Article in Journal/Newspaper |
author |
Sanna, Laura Romeo, Alessio |
spellingShingle |
Sanna, Laura Romeo, Alessio Mineralogy and geochemistry of cryoconite sediments in Eqip Sermia glacier (Central-West Greenland) |
author_facet |
Sanna, Laura Romeo, Alessio |
author_sort |
Sanna, Laura |
title |
Mineralogy and geochemistry of cryoconite sediments in Eqip Sermia glacier (Central-West Greenland) |
title_short |
Mineralogy and geochemistry of cryoconite sediments in Eqip Sermia glacier (Central-West Greenland) |
title_full |
Mineralogy and geochemistry of cryoconite sediments in Eqip Sermia glacier (Central-West Greenland) |
title_fullStr |
Mineralogy and geochemistry of cryoconite sediments in Eqip Sermia glacier (Central-West Greenland) |
title_full_unstemmed |
Mineralogy and geochemistry of cryoconite sediments in Eqip Sermia glacier (Central-West Greenland) |
title_sort |
mineralogy and geochemistry of cryoconite sediments in eqip sermia glacier (central-west greenland) |
publisher |
SAPIENZA Università Editrice |
publishDate |
2018 |
url |
https://rosa.uniroma1.it/rosa04/mediterranean_earth_sciences/article/view/16276 |
long_lat |
ENVELOPE(-50.067,-50.067,69.817,69.817) |
geographic |
Eqip Sermia Greenland |
geographic_facet |
Eqip Sermia Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_source |
Journal of Mediterranean Earth Sciences; V. 10 (2018) Journal of Mediterranean Earth Sciences; Vol. 10 (2018) 2280-6148 2037-2272 |
op_relation |
https://rosa.uniroma1.it/rosa04/mediterranean_earth_sciences/article/view/16276/15697 https://rosa.uniroma1.it/rosa04/mediterranean_earth_sciences/article/view/16276 |
op_rights |
Copyright (c) 2018 Journal of Mediterranean Earth Sciences |
_version_ |
1766008977208901632 |