Hallis, L. J. , Huss, G. R., Nagashima, K., Taylor, G. J., Halldórsson,, S. A., Hilton, D. R., Motti, M. J. and Meech, K. J. (2015) Evidence for primordial water in Earth’s deep mantle. Science, 350(6262), pp. 795-797. (doi: 10.1126/science.aac4834)
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Abstract
The hydrogen-isotope [deuterium/hydrogen (D/H)] ratio of Earth can be used to constrain the origin of its water. However, the most accessible reservoir, Earth’s oceans, may no longer represent the original (primordial) D/H ratio, owing to changes caused by water cycling between the surface and the interior. Thus, a reservoir completely isolated from surface processes is required to define Earth’s original D/H signature. Here we present data for Baffin Island and Icelandic lavas, which suggest that the deep mantle has a low D/H ratio (δD more negative than –218 per mil). Such strongly negative values indicate the existence of a component within Earth’s interior that inherited its D/H ratio directly from the protosolar nebula.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hallis, Dr Lydia |
| Authors: | Hallis, L. J., Huss, G. R., Nagashima, K., Taylor, G. J., Halldórsson,, S. A., Hilton, D. R., Motti, M. J., and Meech, K. J. |
| College/School: | College of Science and Engineering > School of Geographical and Earth Sciences |
| Journal Name: | Science |
| Publisher: | American Association for the Advancement of Science |
| ISSN: | 0036-8075 |
| ISSN (Online): | 1095-9203 |
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