U-series constraints on mantle melting and magma evolution - Koornneef, J. M.
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The main part of this book investigates mantle melting beneath Iceland based on the geochemistry of postglacial lavas collected across the Iceland hotspot. The use of a wide variety of geochemical tracers such as major and trace elements, Hf and Nd isotopes (Chapter 2) and U-series disequilibria (Chapter 4) allows constraining the relative influence of physical source parameters and dynamic melting processes. Particularly U-series isotopes, which inform us on rates of mantle melting are a sensitive tool to map the lateral expression of the temperature anomaly beneath Iceland and to resolve…mehr

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Produktbeschreibung
The main part of this book investigates mantle melting beneath Iceland based on the geochemistry of postglacial lavas collected across the Iceland hotspot. The use of a wide variety of geochemical tracers such as major and trace elements, Hf and Nd isotopes (Chapter 2) and U-series disequilibria (Chapter 4) allows constraining the relative influence of physical source parameters and dynamic melting processes. Particularly U-series isotopes, which inform us on rates of mantle melting are a sensitive tool to map the lateral expression of the temperature anomaly beneath Iceland and to resolve variability in melt productivity as a result of source heterogeneity. To determine the U-series disequilibria recorded by the Icelandic basalts a new technique was developed to chemically separate U, Th, Pa and Ra from a single basaltic aliquot (Chapter 3). In the final part of this book (Chapter 5) the potential to measure in situ U-Th disequilibria in titanite by femto second LA-MC-ICPMS is investigated. The study aimed to spatially resolve variability in U-series in accessory minerals from Laacher See Volcano, Germany to constrain timescales of magma evolution within the crust.
Autorenporträt
Dr. J.M. Koornneef conducted her PhD project published in this book at ETH Zuerich, Switzerland between 2007 and 2010. She is specialised in the field of mantle geochemistry and in analytical isotope detection techniques and currently works as a post-doctoral researcher at the Vrije Universiteit Amsterdam, the Netherlands.