Articles | Volume 37, issue 3
https://doi.org/10.5194/ejm-37-343-2025
https://doi.org/10.5194/ejm-37-343-2025
Research article
 | 
17 Jun 2025
Research article |  | 17 Jun 2025

Non-conventional pressure estimates by using transmission electron microscopy coupled with energy-dispersive spectroscopy (TEM-EDS): testing on submicrometer white mica from low-grade metapelites

Edoardo Sanità, Maria Di Rosa, and Enrico Mugnaioli

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Cited articles

Abad, I., Nieto, F., Gutiérrez-Alonso, G., Campo, M. D., López-Munguira, A., and Velilla, N.: Illitic substitution in micas of very low-grade metamorphic clastic rocks, Eur. J. Mineral., 18, 59–69, https://doi.org/10.1127/0935-1221/2006/0018-0059, 2006 
Airaghi, L., Lanari, P., de Sigoyer, J., and Guillot, S.: Microstructural vs compositional preservation and pseudomorphic replacement of muscovite in deformed metapelites from the Longmen Shan (Sichuan, China), Lithos, 282, 262–280, https://doi.org/10.1016/j.lithos.2017.03.013, 2017. 
Bourdelle, F.: Low-temperature chlorite geothermometry and related recent analytical advances: a review, Minerals, 11, 130, https://doi.org/10.3390/min11020130, 2021. 
Bourdelle, F., Parra, T., Chopin, C., and Beyssac, O.: A new chlorite geothermometer for diagenetic to low-grade metamorphic conditions, Cont. Min. Petrol., 165, 723–735, https://doi.org/10.1007/s00410-012-0832-7, 2013. 
Bourdelle, F., Beyssac, O., Parra, T., and Chopin, C.: Nanoscale chemical zoning of chlorite and implications for low-temperature thermometry: Application to the Glarus Alps (Switzerland), Lithos, 314, 551–561, https://doi.org/10.1016/j.lithos.2018.06.030, 2018. 
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Short summary
The purpose of this paper is to present new perspectives on the pressure estimate of submicrometric white mica using energy-dispersive X-ray spectroscopy performed by a transmission electron microscope. This technique aims to explore the mineral chemistry of single grains whose dimensions do not allow for analysis by microprobe. The validation of this procedure opens a wide range of applications hitherto untested due to instrumental incompatibility with mineral phases smaller than 5 µm.
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