High Arctic geopotential stress field and implications for geodynamic evolution
We use new models of crustal structure and the depth of the lithosphere–asthenosphere boundary to calculate the geopotential energy and its corresponding geopotential stress field for the High Arctic. Palaeostress indicators such as dykes and rifts of known age are used to compare the present day an...
Published in: | Geological Society, London, Special Publications |
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Language: | English |
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Stockholms universitet, Institutionen för geologiska vetenskaper
2018
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-157624 https://doi.org/10.1144/SP460.6 |
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ftstockholmuniv:oai:DiVA.org:su-157624 2023-05-15T14:48:13+02:00 High Arctic geopotential stress field and implications for geodynamic evolution Schiffer, Christian Tegner, Christian Schaeffer, Andrew J. Pease, Victoria Nielsen, Søren B. 2018 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-157624 https://doi.org/10.1144/SP460.6 eng eng Stockholms universitet, Institutionen för geologiska vetenskaper Geological Society Special Publication, 0305-8719, 2018, 460:1, orcid:0000-0003-0498-1849 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-157624 doi:10.1144/SP460.6 info:eu-repo/semantics/openAccess Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Article in journal info:eu-repo/semantics/article text 2018 ftstockholmuniv https://doi.org/10.1144/SP460.6 2023-02-23T21:43:18Z We use new models of crustal structure and the depth of the lithosphere–asthenosphere boundary to calculate the geopotential energy and its corresponding geopotential stress field for the High Arctic. Palaeostress indicators such as dykes and rifts of known age are used to compare the present day and palaeostress fields. When both stress fields coincide, a minimum age for the configuration of the lithospheric stress field may be defined. We identify three regions in which this is observed. In north Greenland and the eastern Amerasia Basin, the stress field is probably the same as that present during the Late Cretaceous. In western Siberia, the stress field is similar to that in the Triassic. The stress directions on the eastern Russian Arctic Shelf and the Amerasia Basin are similar to that in the Cretaceous. The persistent misfit of the present stress field and Early Cretaceous dyke swarms associated with the High Arctic Large Igneous Province indicates a short-lived transient change in the stress field at the time of dyke emplacement. Most Early Cretaceous rifts in the Amerasia Basin coincide with the stress field, suggesting that dyking and rifting were unrelated. We present new evidence for dykes and a graben structure of Early Cretaceous age on Bennett Island. Article in Journal/Newspaper Arctic Bennett Island Greenland North Greenland Siberia Stockholm University: Publications (DiVA) Amerasia Basin ENVELOPE(-170.000,-170.000,80.000,80.000) Arctic Greenland Geological Society, London, Special Publications 460 1 441 465 |
institution |
Open Polar |
collection |
Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
Earth and Related Environmental Sciences Geovetenskap och miljövetenskap |
spellingShingle |
Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Schiffer, Christian Tegner, Christian Schaeffer, Andrew J. Pease, Victoria Nielsen, Søren B. High Arctic geopotential stress field and implications for geodynamic evolution |
topic_facet |
Earth and Related Environmental Sciences Geovetenskap och miljövetenskap |
description |
We use new models of crustal structure and the depth of the lithosphere–asthenosphere boundary to calculate the geopotential energy and its corresponding geopotential stress field for the High Arctic. Palaeostress indicators such as dykes and rifts of known age are used to compare the present day and palaeostress fields. When both stress fields coincide, a minimum age for the configuration of the lithospheric stress field may be defined. We identify three regions in which this is observed. In north Greenland and the eastern Amerasia Basin, the stress field is probably the same as that present during the Late Cretaceous. In western Siberia, the stress field is similar to that in the Triassic. The stress directions on the eastern Russian Arctic Shelf and the Amerasia Basin are similar to that in the Cretaceous. The persistent misfit of the present stress field and Early Cretaceous dyke swarms associated with the High Arctic Large Igneous Province indicates a short-lived transient change in the stress field at the time of dyke emplacement. Most Early Cretaceous rifts in the Amerasia Basin coincide with the stress field, suggesting that dyking and rifting were unrelated. We present new evidence for dykes and a graben structure of Early Cretaceous age on Bennett Island. |
format |
Article in Journal/Newspaper |
author |
Schiffer, Christian Tegner, Christian Schaeffer, Andrew J. Pease, Victoria Nielsen, Søren B. |
author_facet |
Schiffer, Christian Tegner, Christian Schaeffer, Andrew J. Pease, Victoria Nielsen, Søren B. |
author_sort |
Schiffer, Christian |
title |
High Arctic geopotential stress field and implications for geodynamic evolution |
title_short |
High Arctic geopotential stress field and implications for geodynamic evolution |
title_full |
High Arctic geopotential stress field and implications for geodynamic evolution |
title_fullStr |
High Arctic geopotential stress field and implications for geodynamic evolution |
title_full_unstemmed |
High Arctic geopotential stress field and implications for geodynamic evolution |
title_sort |
high arctic geopotential stress field and implications for geodynamic evolution |
publisher |
Stockholms universitet, Institutionen för geologiska vetenskaper |
publishDate |
2018 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-157624 https://doi.org/10.1144/SP460.6 |
long_lat |
ENVELOPE(-170.000,-170.000,80.000,80.000) |
geographic |
Amerasia Basin Arctic Greenland |
geographic_facet |
Amerasia Basin Arctic Greenland |
genre |
Arctic Bennett Island Greenland North Greenland Siberia |
genre_facet |
Arctic Bennett Island Greenland North Greenland Siberia |
op_relation |
Geological Society Special Publication, 0305-8719, 2018, 460:1, orcid:0000-0003-0498-1849 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-157624 doi:10.1144/SP460.6 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1144/SP460.6 |
container_title |
Geological Society, London, Special Publications |
container_volume |
460 |
container_issue |
1 |
container_start_page |
441 |
op_container_end_page |
465 |
_version_ |
1766319312297000960 |