Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/118637
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Type: Journal article
Title: Prolonged dynamic support from the Icelandic plume of the NE Atlantic margin
Author: Hardman, J.
Schofield, N.
Jolley, D.
Holford, S.
Hartley, A.
Morse, S.
Underhill, J.
Watson, D.
Zimmer, E.
Citation: Journal of the Geological Society, 2018; 175(3):396-410
Publisher: Geological Society of London
Issue Date: 2018
ISSN: 0016-7649
2041-479X
Statement of
Responsibility: 
Jonathon P.A. Hardman, Nick Schofield, David W. Jolley, Simon P. Holford, Adrian J. Hartley, Stephen Morse, John R. Underhill, Douglas A. Watson, Eva H. Zimmer
Abstract: Sedimentary basins affected by hotspots often contain records of uplift and subsidence within coeval stratigraphic successions. The subsidence history can contain measurable perturbations in ancient palaeogeographies that can help constrain the duration of dynamic support. At c. 56 Ma the NE Atlantic experienced uplift related to the Iceland mantle plume. Within the Faroe–Shetland Basin, we document the stratigraphic record of subsidence following plume uplift, through integration of regional seismic datasets and well data. Subsidence following plume uplift is recorded by mapping the southward migration of palaeocoastlines throughout the early Eocene of the Faroe–Shetland Basin. We find that after initial uplift over 0.5 myr, subsidence was inhibited for 0.45 myr. Coeval with initiation of rifting in the North Atlantic, at 54.9 Ma, a c. 0.9 myr period of accelerated subsidence occurred, recorded by migration of the coastline by c. 80 km inland. We attribute these events to a prolonged period (2 myr) of dynamic support from the Iceland plume terminated by rapid loss of dynamic support coeval with rifting in the NE Atlantic at 54.9 Ma. Our results suggest that palaeogeographical analysis is a powerful tool in constraining the duration of dynamic support in basins affected by mantle plumes.
Rights: © 2018 The Author(s). Published by The Geological Society of London. All rights reserved. For permissions: http://www.geolsoc.org.uk/permissions. Publishing disclaimer: www.geolsoc.org.uk/pub_ethics
DOI: 10.1144/jgs2017-088
Published version: http://dx.doi.org/10.1144/jgs2017-088
Appears in Collections:Aurora harvest 4
Australian School of Petroleum publications

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