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The onset of the North Atlantic Igneous Province in a rifting perspective

Hansen, J.; Jerram, D.A.; McCaffrey, K.; Passey, S.R.

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Authors

J. Hansen

D.A. Jerram

K. McCaffrey

S.R. Passey



Abstract

The processes that led to the onset and evolution of the North Atlantic Igneous Province IN A I P) have been a theme of debate ill the past decades. A popular theory has been that the impingement on the lower lithosphere of a hot mantle plume (the 'Ancestral Iceland' plume) initiated the first voluminous outbursts of lava and initiated rifling in the North Atlantic area in Early Palaeogene times. Here we review previous studies in order to set the NAIP magmatism in a time-space context. We suggest that global plate reorganizations and lithospheric extension across old orogenic fronts and/or suture zones, aided by other processes in the mantle (e.g. local or regional scale upwellings prior to and during the final Early Eocene rifting), played a role in the generation of the igneous products recorded ill the NAIP for this period. These events gave rise to the extensive Paleocene and Eocene igneous rocks in W Greenland, NW Britain and at the conjugate E Greenland-NW European margins. Many of the relatively large magmatic centres of the NAIP were associated with transient and geographically confined doming in Early Paleocene times prior to the final break-up of the North Atlantic area.

Citation

Hansen, J., Jerram, D., McCaffrey, K., & Passey, S. (2009). The onset of the North Atlantic Igneous Province in a rifting perspective. Geological Magazine, 146(3), 309-325. https://doi.org/10.1017/s0016756809006347

Journal Article Type Article
Publication Date May 1, 2009
Deposit Date May 25, 2010
Publicly Available Date Jun 7, 2010
Journal Geological Magazine
Print ISSN 0016-7568
Electronic ISSN 1469-5081
Publisher Cambridge University Press
Peer Reviewed Peer Reviewed
Volume 146
Issue 3
Pages 309-325
DOI https://doi.org/10.1017/s0016756809006347

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