Journal article
The behaviour of tungsten during mantle melting revisited with implications for planetary differentiation time scales
MG Babechuk, BS Kamber, A Greig, D Canil, J Kodolányi
Geochimica Et Cosmochimica Acta | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2010
Abstract
Tungsten is a moderately siderophile high-field-strength element that is hydrophile and widely regarded as highly incompatible during mantle melting. In an effort to extend empirical knowledge regarding the behaviour of W during the latter process, we report new high-precision trace element data (W, Th, U, Ba, La, Sm) that represent both terrestrial and planetary reservoirs: MORB (11), abyssal peridotites (8), eucrite basalts (3), and carbonaceous chondrites (8). A full trace element suite is also reported for Cordilleran Permian ophiolite peridotites (12) to better constrain the behaviour of W in the upper mantle. In addition, we report our long-term averages for a number of USGS (BIR-1, BH..
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Funding Acknowledgements
The following people are gratefully acknowledged for collecting and donating the MORB samples used in this study: Matthew Leybourne and Nancy Van Wagoner for the GSC/Acadia samples; Robert Embley, William Chadwick and Brian Cousens for the NOAA samples; and David Clague, Alice Davis, Mike Perfit and Brian Cousens for the MBARI samples. Otto Eugster and Alex Bevan are thanked for providing meteorites for this study. The manuscript has benefited from the insightful comments of Herbert Palme and one anonymous reviewer. The first author is funded by an NSERC post-graduate scholarship and analytical work for this study was funded by the Canada Research Chair and Discovery programs of NSERC to the second author.