Quartz grain features in modern glacial and proglacial environments: A microscopic study from the Russell Glacier, southwest Greenland
It is assumed that close to the margins of ice-sheets, glacial, fluvial and aeolian processes overlap, and combined with weathering processes, produce numerous sediments, in which quartz is a common mineral. Quartz grains, if available, may serve as a powerful tool in determining the depositional hi...
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Polish Academy of Sciences
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ftdoajarticles:oai:doaj.org/article:94c4f52dae434bca8543b943876e46d2 2023-05-15T15:11:54+02:00 Quartz grain features in modern glacial and proglacial environments: A microscopic study from the Russell Glacier, southwest Greenland Kalińska-Nartiša Edyta Lamsters Kristaps Karušs Jānis Krievāns Māris Rečs Agnis Meija Raimonds 2017-09-01T00:00:00Z https://doi.org/10.1515/popore-2017-0018 https://doaj.org/article/94c4f52dae434bca8543b943876e46d2 EN eng Polish Academy of Sciences http://www.degruyter.com/view/j/popore.2017.38.issue-3/popore-2017-0018/popore-2017-0018.xml?format=INT https://doaj.org/toc/2081-8262 2081-8262 doi:10.1515/popore-2017-0018 https://doaj.org/article/94c4f52dae434bca8543b943876e46d2 Polish Polar Research, Vol 38, Iss 3, Pp 265-289 (2017) Arctic Greenland modern glacial environment quartz grains scanning electron microscopy Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.1515/popore-2017-0018 2022-12-31T08:26:46Z It is assumed that close to the margins of ice-sheets, glacial, fluvial and aeolian processes overlap, and combined with weathering processes, produce numerous sediments, in which quartz is a common mineral. Quartz grains, if available, may serve as a powerful tool in determining the depositional history, transportation mode and postdepositional processes. However, quartz grain studies in some modern glacial areas are still sparse. In this study, we examine for the first time quartz grains sampled from the modern glacial and proglacial environments of the Russell Glacier, southwest Greenland in binocular microscope and scanning electron microscope, to analyze their shape, character of surface and microtextures. We debate whether the investigated quartz grains reveal glacial characteristics and to what extent they carry a signal of another transportation and sedimentary processes. Although glacial fracturing and abrasion occur in grain suites, most mechanical origin features are not of a high frequency or freshness, potentially suggesting a reduced shear stress in the glacier from its limited thickness and influence of the pressurized water at the ice-bed. In contrast, the signal that originates from the fluvial environment is much stronger derived by numerous aqueous-induced features present on quartz grain surfaces. Aeolian-induced microtextures on grain surfaces increase among the samples the closest to the ice margin, which may be due to enhanced aeolian activity, but are practically absent in sediments taken from the small scale aeolian landforms. In contrast, aeolian grains have been found in the bigger-size (1.0–2.0 mm) investigated fraction. These grains gained the strongest aeolian abrasion, possibly due to changes in transportation mode. Article in Journal/Newspaper Arctic glacier Greenland Polar Research Directory of Open Access Journals: DOAJ Articles Arctic Greenland Polish Polar Research 38 3 265 289 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic Greenland modern glacial environment quartz grains scanning electron microscopy Geology QE1-996.5 |
spellingShingle |
Arctic Greenland modern glacial environment quartz grains scanning electron microscopy Geology QE1-996.5 Kalińska-Nartiša Edyta Lamsters Kristaps Karušs Jānis Krievāns Māris Rečs Agnis Meija Raimonds Quartz grain features in modern glacial and proglacial environments: A microscopic study from the Russell Glacier, southwest Greenland |
topic_facet |
Arctic Greenland modern glacial environment quartz grains scanning electron microscopy Geology QE1-996.5 |
description |
It is assumed that close to the margins of ice-sheets, glacial, fluvial and aeolian processes overlap, and combined with weathering processes, produce numerous sediments, in which quartz is a common mineral. Quartz grains, if available, may serve as a powerful tool in determining the depositional history, transportation mode and postdepositional processes. However, quartz grain studies in some modern glacial areas are still sparse. In this study, we examine for the first time quartz grains sampled from the modern glacial and proglacial environments of the Russell Glacier, southwest Greenland in binocular microscope and scanning electron microscope, to analyze their shape, character of surface and microtextures. We debate whether the investigated quartz grains reveal glacial characteristics and to what extent they carry a signal of another transportation and sedimentary processes. Although glacial fracturing and abrasion occur in grain suites, most mechanical origin features are not of a high frequency or freshness, potentially suggesting a reduced shear stress in the glacier from its limited thickness and influence of the pressurized water at the ice-bed. In contrast, the signal that originates from the fluvial environment is much stronger derived by numerous aqueous-induced features present on quartz grain surfaces. Aeolian-induced microtextures on grain surfaces increase among the samples the closest to the ice margin, which may be due to enhanced aeolian activity, but are practically absent in sediments taken from the small scale aeolian landforms. In contrast, aeolian grains have been found in the bigger-size (1.0–2.0 mm) investigated fraction. These grains gained the strongest aeolian abrasion, possibly due to changes in transportation mode. |
format |
Article in Journal/Newspaper |
author |
Kalińska-Nartiša Edyta Lamsters Kristaps Karušs Jānis Krievāns Māris Rečs Agnis Meija Raimonds |
author_facet |
Kalińska-Nartiša Edyta Lamsters Kristaps Karušs Jānis Krievāns Māris Rečs Agnis Meija Raimonds |
author_sort |
Kalińska-Nartiša Edyta |
title |
Quartz grain features in modern glacial and proglacial environments: A microscopic study from the Russell Glacier, southwest Greenland |
title_short |
Quartz grain features in modern glacial and proglacial environments: A microscopic study from the Russell Glacier, southwest Greenland |
title_full |
Quartz grain features in modern glacial and proglacial environments: A microscopic study from the Russell Glacier, southwest Greenland |
title_fullStr |
Quartz grain features in modern glacial and proglacial environments: A microscopic study from the Russell Glacier, southwest Greenland |
title_full_unstemmed |
Quartz grain features in modern glacial and proglacial environments: A microscopic study from the Russell Glacier, southwest Greenland |
title_sort |
quartz grain features in modern glacial and proglacial environments: a microscopic study from the russell glacier, southwest greenland |
publisher |
Polish Academy of Sciences |
publishDate |
2017 |
url |
https://doi.org/10.1515/popore-2017-0018 https://doaj.org/article/94c4f52dae434bca8543b943876e46d2 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic glacier Greenland Polar Research |
genre_facet |
Arctic glacier Greenland Polar Research |
op_source |
Polish Polar Research, Vol 38, Iss 3, Pp 265-289 (2017) |
op_relation |
http://www.degruyter.com/view/j/popore.2017.38.issue-3/popore-2017-0018/popore-2017-0018.xml?format=INT https://doaj.org/toc/2081-8262 2081-8262 doi:10.1515/popore-2017-0018 https://doaj.org/article/94c4f52dae434bca8543b943876e46d2 |
op_doi |
https://doi.org/10.1515/popore-2017-0018 |
container_title |
Polish Polar Research |
container_volume |
38 |
container_issue |
3 |
container_start_page |
265 |
op_container_end_page |
289 |
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1766342685149364224 |