Late Glacial deglaciation of the Zackenberg area, NE Greenland
The Greenland Ice Sheet (GrIS) is a key component of the global climate system. However, our current understanding of the spatio-temporal oscillations and landscape transformation of the GrIS margins since the last glacial cycle is still incomplete. The objective of this work is to study the deglaci...
| Autores: | , , , , , , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/123374 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/123374 |
| Access Level: | acceso abierto |
| Palabra clave: | 55 550.93 551.3 551.4 911.2 NE Greenland Zackenberg Deglaciation Geomorphology Paraglacial dynamics Cosmic-ray exposure Geografía física Geología Geodinámica 2505.07 Geografía Física 2506 Geología 2506.07 Geomorfología 2506.09 Geología Glacial 2503.04 Geocronología y Radioisótopos |
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Late Glacial deglaciation of the Zackenberg area, NE GreenlandGarcia-Oteyza, J.Oliva, M.Palacios Estremera, DavidFernández Fernández, José MaríaSchimmelpfennig, I.De Andrés de Pablo, NuriaAntoniades, D.Christiansen, H.H.Humlum, O.Léanni, L.Jomelli, V.Ruiz-Fernández, J.Rinterknecht, V.Lane, T.P.Adamson, K.Aumaître, GeorgesBourlès, DidierKeddadouche, Karim55550.93551.3551.4911.2NE GreenlandZackenbergDeglaciationGeomorphologyParaglacial dynamicsCosmic-ray exposureGeografía físicaGeologíaGeodinámica2505.07 Geografía Física2506 Geología2506.07 Geomorfología2506.09 Geología Glacial2503.04 Geocronología y RadioisótoposThe Greenland Ice Sheet (GrIS) is a key component of the global climate system. However, our current understanding of the spatio-temporal oscillations and landscape transformation of the GrIS margins since the last glacial cycle is still incomplete. The objective of this work is to study the deglaciation of the Zackenberg Valley (74°N, 20°E), NE Greenland, and the origin of the derived landforms. Based on extensive fieldwork and high-detail geomorphological mapping we identified the different types of landforms, from which those of glacial and paraglacial origin were used to understand the processes driving regional environmental evolution. We applied cosmic-ray exposure (CRE) dating to 32 samples taken from erosive and depositional glacial landforms distributed across the valley. Geomorphological evidence shows that >800-m-thick Late Quaternary glacier filled the valleys and fjords and covered mountain summits. In subsequent phases, as ice thickness decreased, the glacier was limited to the interior of the valley, leaving several lateral moraines. The deglaciation of the Zackenberg Valley that started by ~13.7–12.5 ka also accelerated slope paraglacial processes. Many blocks from lateral moraines were remobilized and fell, reaching the valley floor where they covered the thinning glacier tongue; transforming it into a debris-covered glacier that subsequently melted gradually. By ca. 10.5 ka, the last remnants of glacial ice disappeared from the Zackenberg Valley floor, a chronology of deglaciation that is similar to that observed in other sites across NE Greenland. The results of this work must be considered in similar studies, reinforcing the need to support CRE ages of the different geomorphological phases with paleoclimatic data from other sedimentary records.ElsevierUniversidad Complutense de Madrid20222022-03-0120222022-03-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/123374reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)InglésengAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016 CTM2017-87976-P OSCILACIONES GLACIARES Y VARIABILIDAD CLIMATICA EN EL NORDESTE DE GROENLANDIAMinisterio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Not available RYC-2015-17597 RYC-2015-17597open accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1233742026-06-02T12:44:21Z |
| dc.title.none.fl_str_mv |
Late Glacial deglaciation of the Zackenberg area, NE Greenland |
| title |
Late Glacial deglaciation of the Zackenberg area, NE Greenland |
| spellingShingle |
Late Glacial deglaciation of the Zackenberg area, NE Greenland Garcia-Oteyza, J. 55 550.93 551.3 551.4 911.2 NE Greenland Zackenberg Deglaciation Geomorphology Paraglacial dynamics Cosmic-ray exposure Geografía física Geología Geodinámica 2505.07 Geografía Física 2506 Geología 2506.07 Geomorfología 2506.09 Geología Glacial 2503.04 Geocronología y Radioisótopos |
| title_short |
Late Glacial deglaciation of the Zackenberg area, NE Greenland |
| title_full |
Late Glacial deglaciation of the Zackenberg area, NE Greenland |
| title_fullStr |
Late Glacial deglaciation of the Zackenberg area, NE Greenland |
| title_full_unstemmed |
Late Glacial deglaciation of the Zackenberg area, NE Greenland |
| title_sort |
Late Glacial deglaciation of the Zackenberg area, NE Greenland |
| dc.creator.none.fl_str_mv |
Garcia-Oteyza, J. Oliva, M. Palacios Estremera, David Fernández Fernández, José María Schimmelpfennig, I. De Andrés de Pablo, Nuria Antoniades, D. Christiansen, H.H. Humlum, O. Léanni, L. Jomelli, V. Ruiz-Fernández, J. Rinterknecht, V. Lane, T.P. Adamson, K. Aumaître, Georges Bourlès, Didier Keddadouche, Karim |
| author |
Garcia-Oteyza, J. |
| author_facet |
Garcia-Oteyza, J. Oliva, M. Palacios Estremera, David Fernández Fernández, José María Schimmelpfennig, I. De Andrés de Pablo, Nuria Antoniades, D. Christiansen, H.H. Humlum, O. Léanni, L. Jomelli, V. Ruiz-Fernández, J. Rinterknecht, V. Lane, T.P. Adamson, K. Aumaître, Georges Bourlès, Didier Keddadouche, Karim |
| author_role |
author |
| author2 |
Oliva, M. Palacios Estremera, David Fernández Fernández, José María Schimmelpfennig, I. De Andrés de Pablo, Nuria Antoniades, D. Christiansen, H.H. Humlum, O. Léanni, L. Jomelli, V. Ruiz-Fernández, J. Rinterknecht, V. Lane, T.P. Adamson, K. Aumaître, Georges Bourlès, Didier Keddadouche, Karim |
| author2_role |
author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Universidad Complutense de Madrid |
| dc.subject.none.fl_str_mv |
55 550.93 551.3 551.4 911.2 NE Greenland Zackenberg Deglaciation Geomorphology Paraglacial dynamics Cosmic-ray exposure Geografía física Geología Geodinámica 2505.07 Geografía Física 2506 Geología 2506.07 Geomorfología 2506.09 Geología Glacial 2503.04 Geocronología y Radioisótopos |
| topic |
55 550.93 551.3 551.4 911.2 NE Greenland Zackenberg Deglaciation Geomorphology Paraglacial dynamics Cosmic-ray exposure Geografía física Geología Geodinámica 2505.07 Geografía Física 2506 Geología 2506.07 Geomorfología 2506.09 Geología Glacial 2503.04 Geocronología y Radioisótopos |
| description |
The Greenland Ice Sheet (GrIS) is a key component of the global climate system. However, our current understanding of the spatio-temporal oscillations and landscape transformation of the GrIS margins since the last glacial cycle is still incomplete. The objective of this work is to study the deglaciation of the Zackenberg Valley (74°N, 20°E), NE Greenland, and the origin of the derived landforms. Based on extensive fieldwork and high-detail geomorphological mapping we identified the different types of landforms, from which those of glacial and paraglacial origin were used to understand the processes driving regional environmental evolution. We applied cosmic-ray exposure (CRE) dating to 32 samples taken from erosive and depositional glacial landforms distributed across the valley. Geomorphological evidence shows that >800-m-thick Late Quaternary glacier filled the valleys and fjords and covered mountain summits. In subsequent phases, as ice thickness decreased, the glacier was limited to the interior of the valley, leaving several lateral moraines. The deglaciation of the Zackenberg Valley that started by ~13.7–12.5 ka also accelerated slope paraglacial processes. Many blocks from lateral moraines were remobilized and fell, reaching the valley floor where they covered the thinning glacier tongue; transforming it into a debris-covered glacier that subsequently melted gradually. By ca. 10.5 ka, the last remnants of glacial ice disappeared from the Zackenberg Valley floor, a chronology of deglaciation that is similar to that observed in other sites across NE Greenland. The results of this work must be considered in similar studies, reinforcing the need to support CRE ages of the different geomorphological phases with paleoclimatic data from other sedimentary records. |
| publishDate |
2022 |
| dc.date.none.fl_str_mv |
2022 2022-03-01 2022 2022-03-01 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/20.500.14352/123374 |
| url |
https://hdl.handle.net/20.500.14352/123374 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.relation.none.fl_str_mv |
Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016 CTM2017-87976-P OSCILACIONES GLACIARES Y VARIABILIDAD CLIMATICA EN EL NORDESTE DE GROENLANDIA Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Not available RYC-2015-17597 RYC-2015-17597 |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
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info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
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openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
Elsevier |
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Elsevier |
| dc.source.none.fl_str_mv |
reponame:Docta Complutense instname:Universidad Complutense de Madrid (UCM) |
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Universidad Complutense de Madrid (UCM) |
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Docta Complutense |
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Docta Complutense |
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15,81155 |