Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6437623 | Geochimica et Cosmochimica Acta | 2016 | 21 Pages |
Abstract
These new results reveal the highly heterogeneous nature of nitrogen in the hybrid Iceland plume source, consistent with models based on trace elements and radiogenic isotopes that advocate for significant heterogeneity of recycled crustal component(s) sampled by the Iceland plume. A relatively young age of the recycled crustal material (possibly Phanerozoic) is consistent with the association of positive δ15N values and high N2/40Arâ ratios with constraints from radiogenic isotopes (e.g., Pb), thus indicating a relatively short time-interval (â¼108 years) between subduction of crustal material and entrainment by the Iceland mantle plume.
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Authors
Sæmundur A. Halldórsson, David R. Hilton, Peter H. Barry, Evelyn Füri, Karl Grönvold,