European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 37, issue 6
Articles | Volume 37, issue 6
https://doi.org/10.5194/ejm-37-927-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-37-927-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 37, issue 6
Letter
 | 
11 Dec 2025
Letter |  | 11 Dec 2025

Coesite in garnet-quartzite of Orco Valley (Western Alps): an additional UHP unit in the records of deeply subducted meta-ophiolites

Federica Boero, Stefano Ghignone, Mattia Gilio, Alessia Borghini, Emanuele Scaramuzzo, Ivano Gasco, and Marco Bruno

Viewed

Total article views: 501 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
356 119 26 501 40 14 19
  • HTML: 356
  • PDF: 119
  • XML: 26
  • Total: 501
  • Supplement: 40
  • BibTeX: 14
  • EndNote: 19
Views and downloads (calculated since 11 Dec 2025)
Cumulative views and downloads (calculated since 11 Dec 2025)

Viewed (geographical distribution)

Total article views: 391 (including HTML, PDF, and XML) Thereof 391 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 11 Feb 2026
Download
Short summary
We report a new ultra-high-pressure (UHP) locality in the western Alps (Italy). Micro-Raman analyses of garnet-hosted inclusions reveal the metamorphic evolution from the prograde path to exhumation. The finding of coesite in the Internal Piedmont Zone (IPZ) meta-ophiolites of Orco Valley suggests that UHP localities represent remnants of a former level that underwent comparable conditions in the coesite stability field in the oceanic slab, from Lago di Cignana to Monviso Massif.
Read more
Share