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Abstract

The North Atlantic Igneous Province - NAIP (Thulean Volcanic Province) - comprises large volumes of intrusive and extrusive igneous rocks. These were emplaced during crustal thinning and subsequent continental break-up and initial phases of seafloor spreading, associated with the rifting and opening of the North Atlantic between Greenland and NW Europe. The NAIP is now dismembered by the opening of the North Atlantic, with elements represented in Baffin Island (Canadian Arctic), west and east Greenland, the Faroe Islands, and in northern and western parts of the British Isles and adjacent offshore areas (Saunders et al. 1997). Igneous activity extended from latest Cretaceous to Middle Eocene, but was most intense during two phases, in the mid-Paleocene and around the Paleocene-Eocene boundary. Its wide extent, predominantly mafic composition and extensive subaerially erupted flood basalts qualify the NAIP as a Large Igneous Province (LIP) or Continental Flood Basalt Province (CFBP) (Saunders et al. 1997).

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