DYNAMIC MELTING OF THE ICELAND PLUME

Icelandic high-magnesia basalts show striking correlations between major element abundances and incompatible element and radiogenic isotope ratios. The most MgO-rich lavas have the most depleted incompatible element ratios and among the least radiogenic lead isotopes recorded in Atlantic mid-ocean-r...

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Bibliographic Details
Main Authors: ELLIOTT, T R, Hawkesworth, Chris, GRONVOLD, K
Format: Article in Journal/Newspaper
Language:English
Published: 1991
Subjects:
OCEAN RIDGE BASALTS
REYKJANES PENINSULA BASALTS
MID-ATLANTIC RIDGE
MANTLE EVOLUTION
BENEATH ICELAND
ISOTOPE RATIOS
FAMOUS AREA
MAGMA
LEAD
STRONTIUM
Mid-Atlantic Ridge
Reykjanes
Iceland
Online Access:https://risweb.st-andrews.ac.uk/portal/en/researchoutput/dynamic-melting-of-the-iceland-plume(6e07170f-fe85-4048-bbad-b4afff569b53).html
http://www.scopus.com/inward/record.url?scp=0026003491&partnerID=8YFLogxK
Description
Summary:Icelandic high-magnesia basalts show striking correlations between major element abundances and incompatible element and radiogenic isotope ratios. The most MgO-rich lavas have the most depleted incompatible element ratios and among the least radiogenic lead isotopes recorded in Atlantic mid-ocean-ridge basalts, highlighting a decoupling of the major and trace element characteristics expected of plume melts. This paradox can be explained by the process that mixes melts segregated from different depths of the melting column. The resulting model provides insight into the processes governing melt compositions at spreading ridges.

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