Geochemistry of North Atlantic Igneous Province basalts ...

• Main Authors: Kempton, Pamela D, Fitton, J Godfrey, Saunders, Andrew D, Nowell, G M, Taylor, R N, Hardarson, B S, Pearson, Grant
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2000
• Subjects: Drilling/drill rig; Leg38; Leg49; Leg80; Leg81; Leg152; Leg163; Glomar Challenger; Joides Resolution; Deep Sea Drilling Project DSDP; Ocean Drilling Program ODP; Greenland; Iceland; Kolbeinsey; North Atlantic; Ocean Island
• Online Access: https://dx.doi.org/10.1594/pangaea.716921; https://doi.pangaea.de/10.1594/PANGAEA.716921

New Sr-Nd-Pb-Hf data require the existence of at least four mantle components in the genesis of basalts from the the North Atlantic Igneous Province (NAIP): (1) one (or more likely a small range of) enriched component(s) within the Iceland plume, (2) a depleted component within the Iceland plume (distinct from the shallow N-MORB source), (3) a depleted sheath surrounding the plume and (4) shallow N-MORB source mantle. These components have been available since the major phase of igneous activity associated with plume head impact during Paleogene times. In Hf-Nd isotope space, samples from Iceland, DSDP Leg 49 (Sites 407, 408 and 409), ODP Legs 152 and 163 (southeast Greenland margin), the Reykjanes Ridge, Kolbeinsey Ridge and DSDP Leg 38 (Site 348) define fields that are oblique to the main ocean island basalt array and extend toward a component with higher 176Hf/177Hf than the N-MORB source available prior to arrival of the plume, as indicated by the compositions of Cretaceous basalts from Goban Spur (~95 ... : Supplement to: Kempton, Pamela D; Fitton, J Godfrey; Saunders, Andrew D; Nowell, G M; Taylor, R N; Hardarson, B S; Pearson, Grant (2000): The Iceland plume in space and time: a Sr-Nd-Pb-Hf study of the North Atlantic rifted margin. Earth and Planetary Science Letters, 177(3-4), 255-271 ...