Titanium stable isotope investigation of magmatic processes on the Earth and Moon

Millet, Marc-Alban and Dauphas, Nicolas and Greber, Nicolas D. and Burton, Kebin W. and Dale, Chris W. and Debret, Baptiste and Macpherson, Colin G. and Nowell, Geoffrey M. and Williams, Helen M. (2016) Titanium stable isotope investigation of magmatic processes on the Earth and Moon. Earth and Planetary Science Letters, 449. pp. 197-205. ISSN 0012-821X DOI 10.1016/j.epsl.2016.05.039

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Abstract

We present titanium stable isotope measurements of terrestrial magmatic samples and lunar mare basalts with the aims of constraining the composition of the lunar and terrestrial mantles and evaluating the potential of Ti stable isotopes for understanding magmatic processes. Relative to the OL–Ti isotope standard, the δ49Ti values of terrestrial samples vary from −0.05 to +0.55‰, whereas those of lunar mare basalts vary from −0.01 to +0.03‰ (the precisions of the double spike Ti isotope measurements are ca. ±0.02‰ at 95% confidence). The Ti stable isotope compositions of differentiated terrestrial magmas define a well-defined positive correlation with SiO2 content, which appears to result from the fractional crystallisation of Ti-bearing oxides with an inferred isotope fractionation factor of View the MathML source

Item Type: Article
Uncontrolled Keywords: NILAREP; IA71
Subjects: 05 - Petrology - Igneous, Metamorphic and Volcanic Studies
Divisions: 05 - Petrology - Igneous, Metamorphic and Volcanic Studies
Journal or Publication Title: Earth and Planetary Science Letters
Volume: 449
Page Range: pp. 197-205
Identification Number: 10.1016/j.epsl.2016.05.039
Depositing User: Sarah Humbert
Date Deposited: 15 Jul 2016 16:40
Last Modified: 15 Jul 2016 16:40
URI: http://eprints.esc.cam.ac.uk/id/eprint/3675

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