Articles | Volume 33, issue 6
Eur. J. Mineral., 33, 675–686, 2021
https://doi.org/10.5194/ejm-33-675-2021

Special issue: Probing the Earth: experiments and mineral physics at mantle...

Eur. J. Mineral., 33, 675–686, 2021
https://doi.org/10.5194/ejm-33-675-2021
Research article
10 Nov 2021
Research article | 10 Nov 2021

New insights in the mechanisms of the reaction 3.65 Å phase  =  clinoenstatite + water down to nanoscales

Monika Koch-Müller et al.

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Cited articles

Anderson, O. and Bowen, N. L.: Das binäre System Magnesiumoxyd-Silicium-2-oxyd, Z. Anorg. Chem., 87, 283–299, 1914. 
Chollet, M., Daniel, I., Koga, K. T., Morard, G., and van de Moortèle, B.: Kinetics and mechanism of antigorite dehydration: Implications for subduction zone seismicity, J. Geophys. Res., 116, B04203, https://doi.org/10.1029/2010JB007739, 2011. 
Ferrand, T. P., Hilairet, N., Incel, S., Deldicque, D., Labrousse, L., Gasc, J., Renner, J., Wang, Y., Green, II, H. W., and Schubnel, A.: Dehydration-driven stress transfer triggers intermediate-depth earthquakes. Nat. Commun., 8, 15247, https://doi.org/10.1038/ncomms15247, 2017. 
Hamilton, D. L. and Henderson, C. M. B.: The preparation of silicate compositions by a gelling method, Mineral. Mag., 36, 832–838, 1968. 
Incel, S., Hilairet, N., Labrousse, L., John, T., Deldicque, D., Ferrand, T., Wang, Y., Renner, J., Morales, L., and Schubnel, A.: Laboratory earthquakes triggered during eclogitization of lawsonite-bearing blueschist, Earth Planet. Sc. Lett., 459, 320–331, 2017. 
Short summary
Dense hydrous magnesium silicates, like the 3.65 Å phase, are thought to cause deep earthquakes. We investigated the dehydration of the 3.65 Å phase at P and T. In both directions of the investigated simple reaction, additional metastable water-rich phases occur. The observed extreme reduction in grain size in the dehydration experiments might cause mechanical instabilities in the Earth’s mantle and, finally, induce earthquakes.