Evidence for kilometre-scale Neogene exhumation driven by compressional deformation in the Irish Sea basin system
Large tracts of the NW European continental shelf and Atlantic margin have experienced kilometre-scale exhumation during the Cenozoic, the timing and causes of which are debated. There is particular uncertainty about the exhumation history of the Irish Sea basin system, Western UK, which has been su...
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Geological Society of London
2008
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Online Access: | http://nora.nerc.ac.uk/id/eprint/4912/ https://nora.nerc.ac.uk/id/eprint/4912/1/Holford_et_al_COMPRESSIONAL_MARGINS_full_paper.pdf http://sp.lyellcollection.org/content/vol306/issue1/ |
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ftnerc:oai:nora.nerc.ac.uk:4912 2024-06-09T07:47:14+00:00 Evidence for kilometre-scale Neogene exhumation driven by compressional deformation in the Irish Sea basin system Holford, S.P. Green, P.F. Turner, J.P Williams, Gareth Hillis, R.R. Tappin, David Duddy, I.R. Johnson, Howard Dore, T.G. Gatliff, Robert Holdsworth, R.W. Lundin, E.R. Ritchie, J.D. 2008 text http://nora.nerc.ac.uk/id/eprint/4912/ https://nora.nerc.ac.uk/id/eprint/4912/1/Holford_et_al_COMPRESSIONAL_MARGINS_full_paper.pdf http://sp.lyellcollection.org/content/vol306/issue1/ en eng Geological Society of London https://nora.nerc.ac.uk/id/eprint/4912/1/Holford_et_al_COMPRESSIONAL_MARGINS_full_paper.pdf Holford, S.P.; Green, P.F.; Turner, J.P; Williams, Gareth; Hillis, R.R.; Tappin, David; Duddy, I.R. 2008 Evidence for kilometre-scale Neogene exhumation driven by compressional deformation in the Irish Sea basin system. In: Johnson, Howard; Dore, T.G.; Gatliff, Robert; Holdsworth, R.W.; Lundin, E.R.; Ritchie, J.D., (eds.) The nature and origin of compression in passive margins. London,UK, Geological Society of London, 91-119. (Special publications, 306). Earth Sciences Publication - Book Section PeerReviewed 2008 ftnerc 2024-05-15T08:49:44Z Large tracts of the NW European continental shelf and Atlantic margin have experienced kilometre-scale exhumation during the Cenozoic, the timing and causes of which are debated. There is particular uncertainty about the exhumation history of the Irish Sea basin system, Western UK, which has been suggested to be a focal point of Cenozoic exhumation across the NW European continental shelf. Many studies have attributed the exhumation of this region to processes associated with the early Palaeogene initiation of the Iceland Plume, whilst the magnitude and causes of Neogene exhumation have attracted little attention. However, the sedimentary basins of the southern Irish Sea contain a mid–late Cenozoic sedimentary succession up to 1.5 km in thickness, the analysis of which should permit the contributions of Palaeogene and Neogene events to the Cenozoic exhumation of this region to be separated. In this paper, an analysis of the palaeothermal, mechanical and structural properties of the Cenozoic succession is presented with the aim of quantifying the timing and magnitude of Neogene exhumation, and identifying its ultimate causes. Synthesis of an extensive apatite fission-track analysis (AFTA), vitrinite reflectance (VR) and compaction (sonic velocity and density log-derived porosities) database shows that the preserved Cenozoic sediments in the southern Irish Sea were more deeply buried by up to 1.5 km of additional section prior to exhumation which began between 20 and 15 Ma. Maximum burial depths of the preserved sedimentary succession in the St George's Channel Basin were reached during mid–late Cenozoic times meaning that no evidence for early Palaeogene exhumation is preserved whereas AFTA data from the Mochras borehole (onshore NW Wales) show that early Palaeogene cooling (i.e. exhumation) at this location was not significant. Seismic reflection data indicate that compressional shortening was the principal driving mechanism for the Neogene exhumation of the southern Irish Sea. Coeval Neogene shortening and ... Book Part Iceland Natural Environment Research Council: NERC Open Research Archive |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Holford, S.P. Green, P.F. Turner, J.P Williams, Gareth Hillis, R.R. Tappin, David Duddy, I.R. Evidence for kilometre-scale Neogene exhumation driven by compressional deformation in the Irish Sea basin system |
topic_facet |
Earth Sciences |
description |
Large tracts of the NW European continental shelf and Atlantic margin have experienced kilometre-scale exhumation during the Cenozoic, the timing and causes of which are debated. There is particular uncertainty about the exhumation history of the Irish Sea basin system, Western UK, which has been suggested to be a focal point of Cenozoic exhumation across the NW European continental shelf. Many studies have attributed the exhumation of this region to processes associated with the early Palaeogene initiation of the Iceland Plume, whilst the magnitude and causes of Neogene exhumation have attracted little attention. However, the sedimentary basins of the southern Irish Sea contain a mid–late Cenozoic sedimentary succession up to 1.5 km in thickness, the analysis of which should permit the contributions of Palaeogene and Neogene events to the Cenozoic exhumation of this region to be separated. In this paper, an analysis of the palaeothermal, mechanical and structural properties of the Cenozoic succession is presented with the aim of quantifying the timing and magnitude of Neogene exhumation, and identifying its ultimate causes. Synthesis of an extensive apatite fission-track analysis (AFTA), vitrinite reflectance (VR) and compaction (sonic velocity and density log-derived porosities) database shows that the preserved Cenozoic sediments in the southern Irish Sea were more deeply buried by up to 1.5 km of additional section prior to exhumation which began between 20 and 15 Ma. Maximum burial depths of the preserved sedimentary succession in the St George's Channel Basin were reached during mid–late Cenozoic times meaning that no evidence for early Palaeogene exhumation is preserved whereas AFTA data from the Mochras borehole (onshore NW Wales) show that early Palaeogene cooling (i.e. exhumation) at this location was not significant. Seismic reflection data indicate that compressional shortening was the principal driving mechanism for the Neogene exhumation of the southern Irish Sea. Coeval Neogene shortening and ... |
author2 |
Johnson, Howard Dore, T.G. Gatliff, Robert Holdsworth, R.W. Lundin, E.R. Ritchie, J.D. |
format |
Book Part |
author |
Holford, S.P. Green, P.F. Turner, J.P Williams, Gareth Hillis, R.R. Tappin, David Duddy, I.R. |
author_facet |
Holford, S.P. Green, P.F. Turner, J.P Williams, Gareth Hillis, R.R. Tappin, David Duddy, I.R. |
author_sort |
Holford, S.P. |
title |
Evidence for kilometre-scale Neogene exhumation driven by compressional deformation in the Irish Sea basin system |
title_short |
Evidence for kilometre-scale Neogene exhumation driven by compressional deformation in the Irish Sea basin system |
title_full |
Evidence for kilometre-scale Neogene exhumation driven by compressional deformation in the Irish Sea basin system |
title_fullStr |
Evidence for kilometre-scale Neogene exhumation driven by compressional deformation in the Irish Sea basin system |
title_full_unstemmed |
Evidence for kilometre-scale Neogene exhumation driven by compressional deformation in the Irish Sea basin system |
title_sort |
evidence for kilometre-scale neogene exhumation driven by compressional deformation in the irish sea basin system |
publisher |
Geological Society of London |
publishDate |
2008 |
url |
http://nora.nerc.ac.uk/id/eprint/4912/ https://nora.nerc.ac.uk/id/eprint/4912/1/Holford_et_al_COMPRESSIONAL_MARGINS_full_paper.pdf http://sp.lyellcollection.org/content/vol306/issue1/ |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
https://nora.nerc.ac.uk/id/eprint/4912/1/Holford_et_al_COMPRESSIONAL_MARGINS_full_paper.pdf Holford, S.P.; Green, P.F.; Turner, J.P; Williams, Gareth; Hillis, R.R.; Tappin, David; Duddy, I.R. 2008 Evidence for kilometre-scale Neogene exhumation driven by compressional deformation in the Irish Sea basin system. In: Johnson, Howard; Dore, T.G.; Gatliff, Robert; Holdsworth, R.W.; Lundin, E.R.; Ritchie, J.D., (eds.) The nature and origin of compression in passive margins. London,UK, Geological Society of London, 91-119. (Special publications, 306). |
_version_ |
1801378200035524608 |