Chemical composition and isotopic ratios of basic lavas from Iceland and the surrounding ocean floor ...

• Main Authors: Wood, D A, Joron, Jean Louis, Treuil, M, Norry, Michael J, Tarney, J
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1979
• Subjects: Drilling/drill rig; Multiple investigations; Leg38; Leg49; Glomar Challenger; Deep Sea Drilling Project DSDP; Iceland; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.667460; https://doi.pangaea.de/10.1594/PANGAEA.667460

Major and trace dement data are used to establish the nature and extent of spatial and temporal chemical variations in basalts erupted in the Iceland region of the North Atlantic Ocean. The ocean floor samples are those recovered by legs 38 and 49 of the Deep Sea Drilling Project. Within each of the active zones on Iceland there are small scale variations in the light rare earth elements and ratios such as K/Y: several central complexes and their associated fissure swarms erupt basalts with values of K/Y distinct from those erupted at adjacent centres; also basalts showing a wide range of immobile trace element ratios occur together within single vertical sections and ocean floor drill holes. Although such variations can be explained in terms of the magmatic processes operating on Iceland they make extrapolations from single basalt samples to mantle sources underlying the outcrop of the sample highly tenuous. 87Sr/86Sr ratios measured for 25 of the samples indicate a total range from 0.7028 in a tholeiite ... : Supplement to: Wood, D A; Joron, Jean Louis; Treuil, M; Norry, Michael J; Tarney, J (1979): Elemental and Sr isotope variations in basic lavas from Iceland and the surrounding ocean floor. Contributions to Mineralogy and Petrology, 70(3), 319-339 ...