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Rift magmatism on the Eurasia basin margin: U-Pb baddeleyite ages of alkaline dyke swarms in North Greenland

Thorarinsson, Sigurjon B.; Söderlund, Ulf LU ; Dossing, Arne; Holm, Paul M.; Ernst, Richard E. and Tegner, Christian (2015) In Journal of the Geological Society 172(6). p.721-726
Abstract
The opening of the Arctic Ocean involved multiple stages of continental rifting and intrusion of extensive dyke swarms. To trace tectonomagmatic processes of the High Arctic, we present the first U-Pb ages for alkaline dyke swarms of North Greenland. Concordia ages of 80.8 +/- 0.6 and 82.1 +/- 1.5 Ma indicate that north-south and east-west dykes are coeval. The north-south dykes reflect initial east-west rifting that led to break-up along the Gakkel Ridge and formation of the Eurasia Basin. The east-west dykes reflect local variations in the stress field associated with reactivated Palaeozoic faults.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Geological Society
volume
172
issue
6
pages
721 - 726
publisher
The Geological Society Publishing House
external identifiers
  • wos:000363986900004
  • scopus:84945914662
ISSN
2041-479X
DOI
10.1144/jgs2015-049
language
English
LU publication?
yes
id
45e38f17-6238-4cc9-9567-f8b0b46a2d72 (old id 8389411)
date added to LUP
2015-12-21 13:44:19
date last changed
2017-09-10 03:20:43
@article{45e38f17-6238-4cc9-9567-f8b0b46a2d72,
  abstract     = {The opening of the Arctic Ocean involved multiple stages of continental rifting and intrusion of extensive dyke swarms. To trace tectonomagmatic processes of the High Arctic, we present the first U-Pb ages for alkaline dyke swarms of North Greenland. Concordia ages of 80.8 +/- 0.6 and 82.1 +/- 1.5 Ma indicate that north-south and east-west dykes are coeval. The north-south dykes reflect initial east-west rifting that led to break-up along the Gakkel Ridge and formation of the Eurasia Basin. The east-west dykes reflect local variations in the stress field associated with reactivated Palaeozoic faults.},
  author       = {Thorarinsson, Sigurjon B. and Söderlund, Ulf and Dossing, Arne and Holm, Paul M. and Ernst, Richard E. and Tegner, Christian},
  issn         = {2041-479X},
  language     = {eng},
  number       = {6},
  pages        = {721--726},
  publisher    = {The Geological Society Publishing House},
  series       = {Journal of the Geological Society},
  title        = {Rift magmatism on the Eurasia basin margin: U-Pb baddeleyite ages of alkaline dyke swarms in North Greenland},
  url          = {http://dx.doi.org/10.1144/jgs2015-049},
  volume       = {172},
  year         = {2015},
}