Wang, W;
Tschauner, O;
Huang, S;
Wu, Z;
Meng, Y;
Bechtel, H;
Mao, H-K;
(2021)
Coupled deep mantle carbon-water cycle: Evidence from lower-mantle diamonds.
The Innovation
, 2
(2)
, Article 100117. 10.1016/j.xinn.2021.100117.
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Abstract
Diamonds form in a variety of environments between subducted crust, lithospheric and deep mantle. Recently, deep source diamonds with inclusions of the high-pressure H2O-phase ice-VII were discovered. By correlating the pressures of ice-VII inclusions with those of other high-pressure inclusions, we assess quantitatively the pressures and temperatures of their entrapment. We show that the ice-VII-bearing diamonds formed at depths down to 800 ± 60 km but temperatures 200-500 K below average mantle temperature that matches the decomposition pressure-temperature conditions of dense hydrous mantle silicates. Our work presents strong evidence for the coupled recycling of water and carbon in the deep mantle based on natural samples.
| Type: | Article |
|---|---|
| Title: | Coupled deep mantle carbon-water cycle: Evidence from lower-mantle diamonds |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.xinn.2021.100117 |
| Publisher version: | http://dx.doi.org/10.1016/j.xinn.2021.100117 |
| Language: | English |
| Additional information: | © 2021 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10128103 |
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