Timmerman, S;
Spivak, AV;
Jones, AP;
(2021)
Carbonatitic Melts and Their Role in Diamond Formation in the Deep Earth.
Elements
, 17
(5)
pp. 321-326.
10.2138/GSELEMENTS.17.5.321.
Preview |
Text
Elements_Oct2021_Timmerman et al.pdf - Accepted Version Download (1MB) | Preview |
Abstract
Carbonatitic high-density fluids and carbonate mineral inclusions in lithospheric and sub-lithospheric diamonds reveal comparable compositions to crustal carbonatites and, thus, support the presence of carbonatitic melts to depths of at least the mantle transition zone (~410–660 km depth). Diamonds and high pressure–high temperature (HP–HT) experiments confirm the stability of lower mantle carbonates. Experiments also show that carbonate melts have extremely low viscosity in the upper mantle. Hence, carbonatitic melts may participate in the deep (mantle) carbon cycle and be highly effective metasomatic agents. Deep carbon in the upper mantle can be mobilized by metasomatic carbonatitic melts, which may have become increasingly volumetrically significant since the onset of carbonate subduction (~3 Ga) to the present day.
| Type: | Article |
|---|---|
| Title: | Carbonatitic Melts and Their Role in Diamond Formation in the Deep Earth |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.2138/GSELEMENTS.17.5.321 |
| Publisher version: | https://doi.org/10.2138/GSELEMENTS.17.5.321 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | carbonatitic melt; diamond; viscosity; metasomatism; carbon cycle; carbonate |
| UCL classification: | 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 UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10147633 |
Archive Staff Only
 |
View Item |
