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
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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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