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A rift-to-drift record of vertical crustal motions in the Faroe-Shetland Basin, NW European margin; establishing constraints on NE Atlantic evolution

Martyn S. Stoker, Simon P. Holford and Richard R. Hillis
A rift-to-drift record of vertical crustal motions in the Faroe-Shetland Basin, NW European margin; establishing constraints on NE Atlantic evolution
Journal of the Geological Society of London (November 2017) 175 (2): 263-274

Abstract

The Upper Paleocene-Eocene rock record in the Faroe-Shetland Basin is punctuated by a series of unconformities that reflect a persistent tectonic instability throughout the syn- to early post-breakup period, a duration of about 20 myr. A particular focus is on a Late Paleocene subaerial unconformity, herein termed the Flett unconformity, which has been argued to have formed in response to a transient pulse of mantle convective uplift associated with a proto-Iceland plume. However, ambiguity over its presumed correlation with the Faroe Islands Basalt Group combined with stratigraphic and palaeogeographical analysis of the Upper Paleocene-Eocene succession indicates that it is just one of a series of subaerial unconformities that are spatially linked to the same part of the Faroe-Shetland Basin. Most of these Late Paleocene-Eocene unconformities post-date volcanism, and their formation coincides with vertical motions associated with phases of uplift, inversion and compressional deformation linked to the growth of structures, such as the Wyville Thomson and Munkagrunnur ridges, and the Judd Anticline. These deformation phases are broadly coeval with intraplate and plate-boundary events in the wider NE Atlantic region. The possibility that the Flett unconformity had a similar tectonic origin should not be discounted.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 175
Serial Issue: 2
Title: A rift-to-drift record of vertical crustal motions in the Faroe-Shetland Basin, NW European margin; establishing constraints on NE Atlantic evolution
Affiliation: University of Adelaide, Australian School of Petroleum, Adelaide, South Aust., Australia
Pages: 263-274
Published: 20171101
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 63
Accession Number: 2018-022468
Categories: Structural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sect., strat. cols., 1 table, geol. sketch maps
N60°00'00" - N61°00'00", W06°00'00" - W03°00'00"
Secondary Affiliation: Deep Exploration Technologies Cooperative Research Centre, AUS, Australia
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 201812
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