New structural and Re–Os geochronological evidence constraining the age of faulting and associated mineralization in the Devonian Orcadian Basin, Scotland.
The Devonian Orcadian Basin in northern Scotland belongs to a regionally linked system of post-Caledonian continental basins extending northwards to western Norway and eastern Greenland. Extensional fault systems that cut the Orcadian Basin sequences are commonly assumed to be Devonian, with some li...
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Online Access: | http://dro.dur.ac.uk/16994/ http://dro.dur.ac.uk/16994/1/16994.pdf https://doi.org/10.1144/jgs2015-118 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:16994 2023-05-15T16:29:20+02:00 New structural and Re–Os geochronological evidence constraining the age of faulting and associated mineralization in the Devonian Orcadian Basin, Scotland. Dichiarante, A.M. Holdsworth, R.E. Dempsey, E.D. Selby, D. Mccaffrey, K.J.W. Michie, U. Morgan, G. Bonniface, J. 2016-05-01 application/pdf http://dro.dur.ac.uk/16994/ http://dro.dur.ac.uk/16994/1/16994.pdf https://doi.org/10.1144/jgs2015-118 unknown Geological Society of London dro:16994 issn:0016-7649 issn: 2041-479X doi:10.1144/jgs2015-118 http://dro.dur.ac.uk/16994/ http://dx.doi.org/10.1144/jgs2015-118 http://dro.dur.ac.uk/16994/1/16994.pdf Journal of the Geological Society, 173, 457-473, May 2016, http://dx.doi.org/10.1144/jgs2015-118 © Geological Society of London 2016. Journal of the Geological Society, 2016, Vol.173(3), pp.457-473 [Peer Reviewed Journal] Article PeerReviewed 2016 ftunivdurham https://doi.org/10.1144/jgs2015-118 2020-06-04T22:22:54Z The Devonian Orcadian Basin in northern Scotland belongs to a regionally linked system of post-Caledonian continental basins extending northwards to western Norway and eastern Greenland. Extensional fault systems that cut the Orcadian Basin sequences are commonly assumed to be Devonian, with some limited inversion and reactivation proposed during the Carboniferous and later times. We present a detailed structural study of the regionally recognized fault systems exposed in the Dounreay area of Caithness, which host significant amounts of authigenic mineralization (carbonate, base metal sulphides, bitumen). Structural and microstructural analyses combined with Re–Os geochronology have been used to date syndeformational fault infills (pyrite) suggesting that faulting, brecciation and fluid flow events are likely to have occurred during the Permian (267.5 ± 3.4 [3.5] Ma). Stress inversion of fault slickenline data associated with mineralization suggest NW–SE regional rifting, an episode also recognized farther west in Sutherland. Thus a dominant set of Permian age brittle faults is now recognized along the entire north coast of Scotland, forming part of the regional-scale North Coast Transfer Zone located on the southern margin of the offshore West Orkney Basin. Article in Journal/Newspaper Greenland Durham University: Durham Research Online Greenland Norway Sutherland ENVELOPE(168.467,168.467,-77.500,-77.500) Journal of the Geological Society 173 3 457 473 |
institution |
Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
description |
The Devonian Orcadian Basin in northern Scotland belongs to a regionally linked system of post-Caledonian continental basins extending northwards to western Norway and eastern Greenland. Extensional fault systems that cut the Orcadian Basin sequences are commonly assumed to be Devonian, with some limited inversion and reactivation proposed during the Carboniferous and later times. We present a detailed structural study of the regionally recognized fault systems exposed in the Dounreay area of Caithness, which host significant amounts of authigenic mineralization (carbonate, base metal sulphides, bitumen). Structural and microstructural analyses combined with Re–Os geochronology have been used to date syndeformational fault infills (pyrite) suggesting that faulting, brecciation and fluid flow events are likely to have occurred during the Permian (267.5 ± 3.4 [3.5] Ma). Stress inversion of fault slickenline data associated with mineralization suggest NW–SE regional rifting, an episode also recognized farther west in Sutherland. Thus a dominant set of Permian age brittle faults is now recognized along the entire north coast of Scotland, forming part of the regional-scale North Coast Transfer Zone located on the southern margin of the offshore West Orkney Basin. |
format |
Article in Journal/Newspaper |
author |
Dichiarante, A.M. Holdsworth, R.E. Dempsey, E.D. Selby, D. Mccaffrey, K.J.W. Michie, U. Morgan, G. Bonniface, J. |
spellingShingle |
Dichiarante, A.M. Holdsworth, R.E. Dempsey, E.D. Selby, D. Mccaffrey, K.J.W. Michie, U. Morgan, G. Bonniface, J. New structural and Re–Os geochronological evidence constraining the age of faulting and associated mineralization in the Devonian Orcadian Basin, Scotland. |
author_facet |
Dichiarante, A.M. Holdsworth, R.E. Dempsey, E.D. Selby, D. Mccaffrey, K.J.W. Michie, U. Morgan, G. Bonniface, J. |
author_sort |
Dichiarante, A.M. |
title |
New structural and Re–Os geochronological evidence constraining the age of faulting and associated mineralization in the Devonian Orcadian Basin, Scotland. |
title_short |
New structural and Re–Os geochronological evidence constraining the age of faulting and associated mineralization in the Devonian Orcadian Basin, Scotland. |
title_full |
New structural and Re–Os geochronological evidence constraining the age of faulting and associated mineralization in the Devonian Orcadian Basin, Scotland. |
title_fullStr |
New structural and Re–Os geochronological evidence constraining the age of faulting and associated mineralization in the Devonian Orcadian Basin, Scotland. |
title_full_unstemmed |
New structural and Re–Os geochronological evidence constraining the age of faulting and associated mineralization in the Devonian Orcadian Basin, Scotland. |
title_sort |
new structural and re–os geochronological evidence constraining the age of faulting and associated mineralization in the devonian orcadian basin, scotland. |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
http://dro.dur.ac.uk/16994/ http://dro.dur.ac.uk/16994/1/16994.pdf https://doi.org/10.1144/jgs2015-118 |
long_lat |
ENVELOPE(168.467,168.467,-77.500,-77.500) |
geographic |
Greenland Norway Sutherland |
geographic_facet |
Greenland Norway Sutherland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Journal of the Geological Society, 2016, Vol.173(3), pp.457-473 [Peer Reviewed Journal] |
op_relation |
dro:16994 issn:0016-7649 issn: 2041-479X doi:10.1144/jgs2015-118 http://dro.dur.ac.uk/16994/ http://dx.doi.org/10.1144/jgs2015-118 http://dro.dur.ac.uk/16994/1/16994.pdf |
op_rights |
Journal of the Geological Society, 173, 457-473, May 2016, http://dx.doi.org/10.1144/jgs2015-118 © Geological Society of London 2016. |
op_doi |
https://doi.org/10.1144/jgs2015-118 |
container_title |
Journal of the Geological Society |
container_volume |
173 |
container_issue |
3 |
container_start_page |
457 |
op_container_end_page |
473 |
_version_ |
1766019026766528512 |