European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 32, issue 1
Articles | Volume 32, issue 1
https://doi.org/10.5194/ejm-32-171-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-32-171-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 32, issue 1
Research article
 | 
11 Feb 2020
Research article |  | 11 Feb 2020

Breyite inclusions in diamond: experimental evidence for possible dual origin

Alan B. Woodland, Andrei V. Girnis, Vadim K. Bulatov, Gerhard P. Brey, and Heidi E. Höfer

Viewed

Total article views: 2,729 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
2,053 607 69 2,729 64 116
  • HTML: 2,053
  • PDF: 607
  • XML: 69
  • Total: 2,729
  • BibTeX: 64
  • EndNote: 116
Views and downloads (calculated since 11 Feb 2020)
Cumulative views and downloads (calculated since 11 Feb 2020)

Viewed (geographical distribution)

Total article views: 2,592 (including HTML, PDF, and XML) Thereof 2,555 with geography defined and 37 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 06 Dec 2025
Download
Short summary
We experimentally explored direct entrapment of breyite (CaSiO3) by diamond at upper-mantle conditions in a model subducted sediment rather than formation by retrogression of CaSiO3 perovskite, implying a deeper origin. Anhydrous low-T melting of CaCO3+SiO2 precludes breyite formation. Under hydrous conditions, reduction of melt results in graphite with breyite. Thus, breyite inclusions in natural diamond may form from aragonite + coesite or carbonate melt at 6–8 GPa via reduction with water.
Read more
Share