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Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study
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Zeitschriftentitel: | Baltica |
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Personen und Körperschaften: | , , , , , |
In: | Baltica, 30, 2018, 2, S. 63-73 |
Format: | E-Article |
Sprache: | Englisch |
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Association of Lithuanian Serials (Publications)
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author_facet |
Kalińska-Nartiša, Edyta Lamsters, Kristaps Karušs, Jānis Krievāns, Māris Rečs, Agnis Meija, Raimonds Kalińska-Nartiša, Edyta Lamsters, Kristaps Karušs, Jānis Krievāns, Māris Rečs, Agnis Meija, Raimonds |
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author |
Kalińska-Nartiša, Edyta Lamsters, Kristaps Karušs, Jānis Krievāns, Māris Rečs, Agnis Meija, Raimonds |
spellingShingle |
Kalińska-Nartiša, Edyta Lamsters, Kristaps Karušs, Jānis Krievāns, Māris Rečs, Agnis Meija, Raimonds Baltica Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study Earth and Planetary Sciences (miscellaneous) |
author_sort |
kalińska-nartiša, edyta |
spelling |
Kalińska-Nartiša, Edyta Lamsters, Kristaps Karušs, Jānis Krievāns, Māris Rečs, Agnis Meija, Raimonds 0067-3064 Association of Lithuanian Serials (Publications) Earth and Planetary Sciences (miscellaneous) http://dx.doi.org/10.5200/baltica.2017.30.08 <jats:p>The western ablation zone of the Greenland ice sheet is darker than the surrounding ice, because a higher amount of fine-grained particles, known as a cryoconite, occur. To date, biotic cryoconite components have gained a lot of attention, in contrast with mineral components, which have been studied to a limited extent. In this study, fine-grained quartz grains from the cryoconite holes of the Russell Glacier, southwest Greenland are, therefore, examined. Authors use scanning electron microscope to elucidate shape, surface character and origin of these mineral quartz particles. Triangular-faceted, sharp-edged grains dominate in most of the investigated samples, and originate from local sources, where grain-to-grain contact in the ice prevail. Grains with smooth corners and edges result from chemical weathering in meltwater of alkaline pH, in which quartz solubility significantly increases. However, part of these rounded grains is due to mechanical abrasion by wind action. Postsedimentary frost action is visible through grains entirely or partially covered by scaly-grained encrustation. Local processes and sources are largely responsible for aforementioned grain outlines. However, few grains with bulbous silica precipitation argue for a dry and warm climate, and distant, out-of-Greenland origin.</jats:p> Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study Baltica |
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10.5200/baltica.2017.30.08 |
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title |
Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_unstemmed |
Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_full |
Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_fullStr |
Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_full_unstemmed |
Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_short |
Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_sort |
fine-grained quartz from cryoconite holes of the russell glacier, southwest greenland – a scanning electron microscopy study |
topic |
Earth and Planetary Sciences (miscellaneous) |
url |
http://dx.doi.org/10.5200/baltica.2017.30.08 |
publishDate |
2018 |
physical |
63-73 |
description |
<jats:p>The western ablation zone of the Greenland ice sheet is darker than the surrounding ice, because a higher amount of fine-grained particles, known as a cryoconite, occur. To date, biotic cryoconite components have gained a lot of attention, in contrast with mineral components, which have been studied to a limited extent. In this study, fine-grained quartz grains from the cryoconite holes of the Russell Glacier, southwest Greenland are, therefore, examined. Authors use scanning electron microscope to elucidate shape, surface character and origin of these mineral quartz particles. Triangular-faceted, sharp-edged grains dominate in most of the investigated samples, and originate from local sources, where grain-to-grain contact in the ice prevail. Grains with smooth corners and edges result from chemical weathering in meltwater of alkaline pH, in which quartz solubility significantly increases. However, part of these rounded grains is due to mechanical abrasion by wind action. Postsedimentary frost action is visible through grains entirely or partially covered by scaly-grained encrustation. Local processes and sources are largely responsible for aforementioned grain outlines. However, few grains with bulbous silica precipitation argue for a dry and warm climate, and distant, out-of-Greenland origin.</jats:p> |
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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, Kalińska-Nartiša, Edyta, Lamsters, Kristaps, Karušs, Jānis, Krievāns, Māris, Rečs, Agnis, Meija, Raimonds |
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description | <jats:p>The western ablation zone of the Greenland ice sheet is darker than the surrounding ice, because a higher amount of fine-grained particles, known as a cryoconite, occur. To date, biotic cryoconite components have gained a lot of attention, in contrast with mineral components, which have been studied to a limited extent. In this study, fine-grained quartz grains from the cryoconite holes of the Russell Glacier, southwest Greenland are, therefore, examined. Authors use scanning electron microscope to elucidate shape, surface character and origin of these mineral quartz particles. Triangular-faceted, sharp-edged grains dominate in most of the investigated samples, and originate from local sources, where grain-to-grain contact in the ice prevail. Grains with smooth corners and edges result from chemical weathering in meltwater of alkaline pH, in which quartz solubility significantly increases. However, part of these rounded grains is due to mechanical abrasion by wind action. Postsedimentary frost action is visible through grains entirely or partially covered by scaly-grained encrustation. Local processes and sources are largely responsible for aforementioned grain outlines. However, few grains with bulbous silica precipitation argue for a dry and warm climate, and distant, out-of-Greenland origin.</jats:p> |
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spelling | Kalińska-Nartiša, Edyta Lamsters, Kristaps Karušs, Jānis Krievāns, Māris Rečs, Agnis Meija, Raimonds 0067-3064 Association of Lithuanian Serials (Publications) Earth and Planetary Sciences (miscellaneous) http://dx.doi.org/10.5200/baltica.2017.30.08 <jats:p>The western ablation zone of the Greenland ice sheet is darker than the surrounding ice, because a higher amount of fine-grained particles, known as a cryoconite, occur. To date, biotic cryoconite components have gained a lot of attention, in contrast with mineral components, which have been studied to a limited extent. In this study, fine-grained quartz grains from the cryoconite holes of the Russell Glacier, southwest Greenland are, therefore, examined. Authors use scanning electron microscope to elucidate shape, surface character and origin of these mineral quartz particles. Triangular-faceted, sharp-edged grains dominate in most of the investigated samples, and originate from local sources, where grain-to-grain contact in the ice prevail. Grains with smooth corners and edges result from chemical weathering in meltwater of alkaline pH, in which quartz solubility significantly increases. However, part of these rounded grains is due to mechanical abrasion by wind action. Postsedimentary frost action is visible through grains entirely or partially covered by scaly-grained encrustation. Local processes and sources are largely responsible for aforementioned grain outlines. However, few grains with bulbous silica precipitation argue for a dry and warm climate, and distant, out-of-Greenland origin.</jats:p> Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study Baltica |
spellingShingle | Kalińska-Nartiša, Edyta, Lamsters, Kristaps, Karušs, Jānis, Krievāns, Māris, Rečs, Agnis, Meija, Raimonds, Baltica, Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study, Earth and Planetary Sciences (miscellaneous) |
title | Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_full | Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_fullStr | Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_full_unstemmed | Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_short | Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
title_sort | fine-grained quartz from cryoconite holes of the russell glacier, southwest greenland – a scanning electron microscopy study |
title_unstemmed | Fine-grained quartz from cryoconite holes of the Russell Glacier, southwest Greenland – a scanning electron microscopy study |
topic | Earth and Planetary Sciences (miscellaneous) |
url | http://dx.doi.org/10.5200/baltica.2017.30.08 |