In situ Raman spectroscopic study of interaction between phengite and water under  P – T  conditions typical of subduction zones

S. V. Goryainov; A. S. Krylov; O. P. Polyansky; A. N. Vtyurin; N. Yu. Zmeeva

doi:10.3103/S1062873817050100

In situ Raman spectroscopic study of interaction between phengite and water under P–T conditions typical of subduction zones

Authors: Goryainov S.V.¹, Krylov A.S.², Polyansky O.P.¹, Vtyurin A.N.², Zmeeva N.Y.³
Affiliations:
1. Sobolev Institute of Geology and Mineralogy
2. Kirensky Institute of Physics
3. Ural State University of Economics
Issue: Vol 81, No 5 (2017)
Pages: 590-593
Section: Proceedings of the “OMA-19”, “ODPO-19”
URL: https://journals.rcsi.science/1062-8738/article/view/185078
DOI: https://doi.org/10.3103/S1062873817050100
ID: 185078

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Abstract

In situ Raman spectroscopy is used to study the layered mineral phengite K(Al, Mg)₂(Si, Al)₄O₁₀(OH)₂ in water under the high temperature and pressure conditions typical of cold subduction zones (T up to 373°C and P = 12.5 GPa). High pressure and temperature were created in a resistively heated diamond anvil cell. Raman spectra show the high P–T stability of phengite. No reversible polymorphic transitions (overhydration or notable amorphization) are observed.