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

Hansen, J. and Jerram, D. A. and McCaffrey, K. and Passey, S. R. (2009) 'The onset of the North Atlantic Igneous Province in a rifting perspective.', Geological magazine., 146 (3). pp. 309-325.


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.

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Publisher statement:© Copyright Cambridge University Press 2009. This paper has been published by Cambridge University Press in "Geological magazine" (146: 3 (2007) 309-325)
Record Created:28 May 2010 09:50
Last Modified:07 Jun 2010 11:41

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