Journal article
Thallium elemental behavior and stable isotope fractionation during magmatic processes
J Prytulak, A Brett, M Webb, T Plank, M Rehkämper, PS Savage, J Woodhead
Chemical Geology | ELSEVIER | Published : 2017
Abstract
Stable thallium (Tl) isotopes are an extremely sensitive tracer for the addition of small amounts of sediments or materials altered at low temperatures to the source(s) of mantle-derived melts. The ability of Tl to trace such materials is due to the large concentration contrast between the mantle (Tl μg/g), which also often display fractionated Tl isotope compositions. However, the magnitude of Tl isotope fractionation induced by igneous processes alone has not been systematically assessed. Here, two suites of co-genetic magmas, spanning a large range of differentiation, from Hekla, Iceland, and Anatahan, in the Mariana arc, are used to assess the behavior of thallium and its stable isotope..
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Awarded by Imperial College London
Funding Acknowledgements
JP was partly supported by NERC fellowship NE/H01313X/2. AB was supported by a Janet Watson Earth Science and Engineering Departmental PhD studentship and MW was supported in part by an undergraduate research opportunity award from Imperial College London. Trace element analyses were supported from US NSF Grant EAR-1456814 to TP. We thank two anonymous reviewers and editors C. Chauvel for their helpful comments and suggestions. F. Jenner is thanked for discussion of all things chalcophile; L Bolge and D. Rasmussen for ICP-MS analysis of Helda and Anatahn samples; and B. Coles and K. Kreissig are gratefully acknowledged for smooth running of the MAGIC mass spectrometry and clean lab facilities.