The scale of source heterogeneity beneath the eastern neovolcanic zone, Iceland

T. Furman, F. Frey, K. H. Park

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

Geochemical characteristics of Icelandic basalts require mixing of several sources: depleted asthenosphere, a plume (presumably heterogeneous), and an enriched component (e.g. hydrothermally altered crust). Lava compositions and Sr-Nd-Pb isotopic ratios from neighbouring coeval volcanic centres are used to define spatial variations in source components beneath the neovolcanic zones. Within the Eastern Volcanic Zone, basalt compositions vary systematically from tholeiitic near central Iceland (Veidivotn, Grimsvotn) to Fe-Ti tholeiites at Hekla and Katla, to alkaline in Vestmannaeyjar. Each volcanic centre has distinctive geochemical characteristics that require differences in source components and proportions on the scale of 10-20 km. -Authors

Original languageEnglish (US)
Pages (from-to)997-1002
Number of pages6
JournalJournal - Geological Society (London)
Volume152
Issue number6
DOIs
StatePublished - Jan 1 1995

All Science Journal Classification (ASJC) codes

  • Geology

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