Cryostratigraphy, sedimentology, and the late Quaternary evolution of the Zackenberg River delta, northeast Greenland
The Zackenberg River delta is located in northeast Greenland (74°30′ N, 20°30′ E) at the outlet of the Zackenberg fjord valley. The fjord-valley fill consists of a series of terraced deltaic deposits (ca. 2 km2) formed during relative sea-level (RSL) fall. We investigated the deposits using sediment...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:7bcbe1f549294514aebe36d75e0f8f2a 2023-05-15T16:27:10+02:00 Cryostratigraphy, sedimentology, and the late Quaternary evolution of the Zackenberg River delta, northeast Greenland G. L. Gilbert S. Cable C. Thiel H. H. Christiansen B. Elberling 2017-05-01 https://doi.org/10.5194/tc-11-1265-2017 http://www.the-cryosphere.net/11/1265/2017/tc-11-1265-2017.pdf https://doaj.org/article/7bcbe1f549294514aebe36d75e0f8f2a en eng Copernicus Publications doi:10.5194/tc-11-1265-2017 1994-0416 1994-0424 http://www.the-cryosphere.net/11/1265/2017/tc-11-1265-2017.pdf https://doaj.org/article/7bcbe1f549294514aebe36d75e0f8f2a undefined The Cryosphere, Vol 11, Pp 1265-1282 (2017) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.5194/tc-11-1265-2017 2023-01-22T19:23:44Z The Zackenberg River delta is located in northeast Greenland (74°30′ N, 20°30′ E) at the outlet of the Zackenberg fjord valley. The fjord-valley fill consists of a series of terraced deltaic deposits (ca. 2 km2) formed during relative sea-level (RSL) fall. We investigated the deposits using sedimentological and cryostratigraphic techniques together with optically stimulated luminescence (OSL) dating. We identify four facies associations in sections (4 to 22 m in height) exposed along the modern Zackenberg River and coast. Facies associations relate to (I) overriding glaciers, (II) retreating glaciers and quiescent glaciomarine conditions, (III) delta progradation in a fjord valley, and (IV) fluvial activity and niveo-aeolian processes. Pore, layered, and suspended cryofacies are identified in two 20 m deep ice-bonded sediment cores. The cryofacies distribution, together with low overall ground-ice content, indicates that permafrost is predominately epigenetic in these deposits. Fourteen OSL ages constrain the deposition of the cored deposits to between approximately 13 and 11 ka, immediately following deglaciation. The timing of permafrost aggradation was closely related to delta progradation and began following the subaerial exposure of the delta plain (ca. 11 ka). Our results reveal information concerning the interplay between deglaciation, RSL change, sedimentation, permafrost aggradation, and the timing of these events. These findings have implications for the timing and mode of permafrost aggradation in other fjord valleys in northeast Greenland. Article in Journal/Newspaper Greenland Ice permafrost The Cryosphere Zackenberg Unknown Greenland The Cryosphere 11 3 1265 1282 |
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English |
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geo envir |
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geo envir G. L. Gilbert S. Cable C. Thiel H. H. Christiansen B. Elberling Cryostratigraphy, sedimentology, and the late Quaternary evolution of the Zackenberg River delta, northeast Greenland |
topic_facet |
geo envir |
description |
The Zackenberg River delta is located in northeast Greenland (74°30′ N, 20°30′ E) at the outlet of the Zackenberg fjord valley. The fjord-valley fill consists of a series of terraced deltaic deposits (ca. 2 km2) formed during relative sea-level (RSL) fall. We investigated the deposits using sedimentological and cryostratigraphic techniques together with optically stimulated luminescence (OSL) dating. We identify four facies associations in sections (4 to 22 m in height) exposed along the modern Zackenberg River and coast. Facies associations relate to (I) overriding glaciers, (II) retreating glaciers and quiescent glaciomarine conditions, (III) delta progradation in a fjord valley, and (IV) fluvial activity and niveo-aeolian processes. Pore, layered, and suspended cryofacies are identified in two 20 m deep ice-bonded sediment cores. The cryofacies distribution, together with low overall ground-ice content, indicates that permafrost is predominately epigenetic in these deposits. Fourteen OSL ages constrain the deposition of the cored deposits to between approximately 13 and 11 ka, immediately following deglaciation. The timing of permafrost aggradation was closely related to delta progradation and began following the subaerial exposure of the delta plain (ca. 11 ka). Our results reveal information concerning the interplay between deglaciation, RSL change, sedimentation, permafrost aggradation, and the timing of these events. These findings have implications for the timing and mode of permafrost aggradation in other fjord valleys in northeast Greenland. |
format |
Article in Journal/Newspaper |
author |
G. L. Gilbert S. Cable C. Thiel H. H. Christiansen B. Elberling |
author_facet |
G. L. Gilbert S. Cable C. Thiel H. H. Christiansen B. Elberling |
author_sort |
G. L. Gilbert |
title |
Cryostratigraphy, sedimentology, and the late Quaternary evolution of the Zackenberg River delta, northeast Greenland |
title_short |
Cryostratigraphy, sedimentology, and the late Quaternary evolution of the Zackenberg River delta, northeast Greenland |
title_full |
Cryostratigraphy, sedimentology, and the late Quaternary evolution of the Zackenberg River delta, northeast Greenland |
title_fullStr |
Cryostratigraphy, sedimentology, and the late Quaternary evolution of the Zackenberg River delta, northeast Greenland |
title_full_unstemmed |
Cryostratigraphy, sedimentology, and the late Quaternary evolution of the Zackenberg River delta, northeast Greenland |
title_sort |
cryostratigraphy, sedimentology, and the late quaternary evolution of the zackenberg river delta, northeast greenland |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-1265-2017 http://www.the-cryosphere.net/11/1265/2017/tc-11-1265-2017.pdf https://doaj.org/article/7bcbe1f549294514aebe36d75e0f8f2a |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice permafrost The Cryosphere Zackenberg |
genre_facet |
Greenland Ice permafrost The Cryosphere Zackenberg |
op_source |
The Cryosphere, Vol 11, Pp 1265-1282 (2017) |
op_relation |
doi:10.5194/tc-11-1265-2017 1994-0416 1994-0424 http://www.the-cryosphere.net/11/1265/2017/tc-11-1265-2017.pdf https://doaj.org/article/7bcbe1f549294514aebe36d75e0f8f2a |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-11-1265-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
3 |
container_start_page |
1265 |
op_container_end_page |
1282 |
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1766016253245259776 |