Mid-Pleistocene thin-skinned glaciotectonic thrusting of the Aberdeen Ground Formation, Central Graben region, central North Sea
This paper presents the results of a high-resolution 2D seismic survey of mid-Pleistocene glaciogenic sediments in the Central Graben region of the central North Sea. Sediments have undergone major glaciotectonic thrusting and folding associated with the repeated southerly advance of a mid-Pleistoce...
Published in: | Journal of Quaternary Science |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2017
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/513516/ https://nora.nerc.ac.uk/id/eprint/513516/1/DVH%20and%20phillips%20JQS%20North%20Sea%20paper.pdf https://doi.org/10.1002/jqs.2836 |
id |
ftnerc:oai:nora.nerc.ac.uk:513516 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:513516 2023-05-15T16:41:04+02:00 Mid-Pleistocene thin-skinned glaciotectonic thrusting of the Aberdeen Ground Formation, Central Graben region, central North Sea Vaughan-Hirsch, David P. Phillips, Emrys R. 2017 text http://nora.nerc.ac.uk/id/eprint/513516/ https://nora.nerc.ac.uk/id/eprint/513516/1/DVH%20and%20phillips%20JQS%20North%20Sea%20paper.pdf https://doi.org/10.1002/jqs.2836 en eng Wiley https://nora.nerc.ac.uk/id/eprint/513516/1/DVH%20and%20phillips%20JQS%20North%20Sea%20paper.pdf Vaughan-Hirsch, David P.; Phillips, Emrys R. 2017 Mid-Pleistocene thin-skinned glaciotectonic thrusting of the Aberdeen Ground Formation, Central Graben region, central North Sea. Journal of Quaternary Science, 32 (2). 196-212. https://doi.org/10.1002/jqs.2836 <https://doi.org/10.1002/jqs.2836> Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.1002/jqs.2836 2023-02-04T19:42:59Z This paper presents the results of a high-resolution 2D seismic survey of mid-Pleistocene glaciogenic sediments in the Central Graben region of the central North Sea. Sediments have undergone major glaciotectonic thrusting and folding associated with the repeated southerly advance of a mid-Pleistocene ice sheet. The total observed length of the thrust-stacked section is approximately 5–6 km, comprising a series of discrete thrust slices, which range in length from < 300 m to > 700 m. The basal detachment of the thrust complex occurs at a depth of ca. 220 m below the sea bed within the upper Aberdeen Ground Formation. A thin-skinned glaciotectonic model involving proglacial to ice-marginal glaciotectonic thrusting followed by post-tectonic deposition is proposed. Initial ice advance led to the over-pressurizing of groundwater within a laterally extensive sand sheet in the upper Aberdeen Ground Formation, promoting the formation of a major décollement surface at the base of the developing thrust-stack. Over-pressurization of the groundwater system is thought to have occurred in response to rapid ice advance, suggesting that the development of large-scale thrust complexes may be associated with surge-type behaviour. The proposed model evidences complex dynamics of mid-Pleistocene ice sheets within the central North Sea. Article in Journal/Newspaper Ice Sheet Natural Environment Research Council: NERC Open Research Archive Journal of Quaternary Science 32 2 196 212 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
This paper presents the results of a high-resolution 2D seismic survey of mid-Pleistocene glaciogenic sediments in the Central Graben region of the central North Sea. Sediments have undergone major glaciotectonic thrusting and folding associated with the repeated southerly advance of a mid-Pleistocene ice sheet. The total observed length of the thrust-stacked section is approximately 5–6 km, comprising a series of discrete thrust slices, which range in length from < 300 m to > 700 m. The basal detachment of the thrust complex occurs at a depth of ca. 220 m below the sea bed within the upper Aberdeen Ground Formation. A thin-skinned glaciotectonic model involving proglacial to ice-marginal glaciotectonic thrusting followed by post-tectonic deposition is proposed. Initial ice advance led to the over-pressurizing of groundwater within a laterally extensive sand sheet in the upper Aberdeen Ground Formation, promoting the formation of a major décollement surface at the base of the developing thrust-stack. Over-pressurization of the groundwater system is thought to have occurred in response to rapid ice advance, suggesting that the development of large-scale thrust complexes may be associated with surge-type behaviour. The proposed model evidences complex dynamics of mid-Pleistocene ice sheets within the central North Sea. |
format |
Article in Journal/Newspaper |
author |
Vaughan-Hirsch, David P. Phillips, Emrys R. |
spellingShingle |
Vaughan-Hirsch, David P. Phillips, Emrys R. Mid-Pleistocene thin-skinned glaciotectonic thrusting of the Aberdeen Ground Formation, Central Graben region, central North Sea |
author_facet |
Vaughan-Hirsch, David P. Phillips, Emrys R. |
author_sort |
Vaughan-Hirsch, David P. |
title |
Mid-Pleistocene thin-skinned glaciotectonic thrusting of the Aberdeen Ground Formation, Central Graben region, central North Sea |
title_short |
Mid-Pleistocene thin-skinned glaciotectonic thrusting of the Aberdeen Ground Formation, Central Graben region, central North Sea |
title_full |
Mid-Pleistocene thin-skinned glaciotectonic thrusting of the Aberdeen Ground Formation, Central Graben region, central North Sea |
title_fullStr |
Mid-Pleistocene thin-skinned glaciotectonic thrusting of the Aberdeen Ground Formation, Central Graben region, central North Sea |
title_full_unstemmed |
Mid-Pleistocene thin-skinned glaciotectonic thrusting of the Aberdeen Ground Formation, Central Graben region, central North Sea |
title_sort |
mid-pleistocene thin-skinned glaciotectonic thrusting of the aberdeen ground formation, central graben region, central north sea |
publisher |
Wiley |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/513516/ https://nora.nerc.ac.uk/id/eprint/513516/1/DVH%20and%20phillips%20JQS%20North%20Sea%20paper.pdf https://doi.org/10.1002/jqs.2836 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://nora.nerc.ac.uk/id/eprint/513516/1/DVH%20and%20phillips%20JQS%20North%20Sea%20paper.pdf Vaughan-Hirsch, David P.; Phillips, Emrys R. 2017 Mid-Pleistocene thin-skinned glaciotectonic thrusting of the Aberdeen Ground Formation, Central Graben region, central North Sea. Journal of Quaternary Science, 32 (2). 196-212. https://doi.org/10.1002/jqs.2836 <https://doi.org/10.1002/jqs.2836> |
op_doi |
https://doi.org/10.1002/jqs.2836 |
container_title |
Journal of Quaternary Science |
container_volume |
32 |
container_issue |
2 |
container_start_page |
196 |
op_container_end_page |
212 |
_version_ |
1766031506595119104 |