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Raman study of phengite at P-T conditions modeling cold slab subduction / A. S. Oreshonkov [et al.] // XII Int. conf. "GeoRaman-2016" : abstract volume / compiled and edited by T.A. Alifirova, S.V. Rashchenko, A.V. Korsakov. - Novosibirsk : Офсет, 2016. - P. 97. - References: 1. - This work was supported by the Russian Foundation for Basic Research (projects No. 14-05-00616 and 15-55-45070-IND) and the Russian Science Foundation (project No.15-17-30012). . - ISBN 978-5-85957-124-6
Аннотация: Phengite K(Al,Mg)2(OH)2 (Si,Al)4O10 is potassium dioctahedral mica. Its structure is similar to that of muscovite, but with high content of Mg. Phengite as water transporter is among the most deep hydrated minerals in subducting slabs [1].We present Raman study of phengite compressed in water medium at simultaneously high P-T conditions up to 500 °C and 12.2 GPa, in order to model its behavior at conditions of cold slab subduction and to detect possible non-quenchable states (polymorphism, amorphization and dehydration). Raman spectra of phengite exhibit high stability up to maximal P-T parameters used (Fig. 1). Its Raman bands slightly decrease in intensity and widen in the range of 300-500 °C. Monotonous P-dependences of the wavenumbers of strong bands at 263, 703 and 3612 cm–1 (the last is O-H stretching mode) prove that no transitions are available at high P-T. According to the data [1], phengite can transform to K-hollandite at P10 GPa, T 500 °C, however, we did not observe this transformation that could be caused by small time (~4 h) in our experiment or different composition of phengite samples. Thus, our insitu experiments prove highly baric and temperature stability and absence non-quenchable transitions of phengite.

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Доп.точки доступа:
Alifirova, T. A. \ed.\; Rashchenko, S. V. \ed.\; Korsakov, A. V. \ed.\; Goryainov, S. V.; Горяйнов, Сергей Владимирович; Krylov, A. S.; Крылов, Александр Сергеевич; Polyansky, O. P.; Полянский, О. П.; Vtyurin, A. N.; Втюрин, Александр Николаевич; "GeoRaman", International conference(12 ; 2016 ; June ; 9-15 ; Novosibirsk); Российская академия наук; Сибирское отделение РАН; Институт геологии и минералогии им. В.С. Соболева Сибирского отделения РАН
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In situ Raman spectroscopic study of interaction between phengite and water under P–T conditions typical of subduction zones / S. V. Goryainov [et al.] // Bull. Russ. Acad. Sci. Phys. - 2017. - Vol. 81, Is. 5. - P. 590-593, DOI 10.3103/S1062873817050100. - Cited References: 14 . - ISSN 1062-8738
Кл.слова (ненормированные):
High pressure engineering -- Spectroscopic analysis -- Cold subduction -- Diamond-anvil cell -- High temperature and pressure -- High-pressure and temperatures -- In-situ Raman spectroscopy -- Polymorphic transitions -- Resistively heated -- Subduction zones -- Raman spectroscopy
Аннотация: 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. © 2017, Allerton Press, Inc.

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Публикация на русском языке In situ КР-исследование взаимодействия фенгита с водной средой при субдукционных P-J-параметрах [Текст] / С. В. Горяйнов [и др.] // Изв. РАН. Сер. физич. - 2017. - Т. 81 № 5. - С. 637-640

Держатели документа:
Sobolev Institute of Geology and Mineralogy, Russian Academy of Sciences, Siberian Branch, Novosibirsk, Russian Federation
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Akademgorodok, Krasnoyarsk, Russian Federation
Ural State University of Economics, Yekaterinburg, Russian Federation

Доп.точки доступа:
Goryainov, S. V.; Krylov, A. S.; Крылов, Александр Сергеевич; Polyansky, O. P.; Vtyurin, A. N.; Втюрин, Александр Николаевич; Zmeeva, N. Y.
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    In-situ Raman study of phengite compressed in water medium under simultaneously high P-T parameters / S. V. Goryainov [et al.] // J. Raman Spectrosc. - 2017. - Vol. 48, Is. 11. - P. 1431-1437, DOI 10.1002/jrs.5112. - Cited References:57. - This work was supported by the Russian Science Foundation (Grant No. 15-17-30012) . - ISSN 0377-0486. - ISSN 1097-4555
   Перевод заглавия: Исследование фенгита в сжатом состоянии в водной среде при одновременном высоком параметре P-T методом комбинационного расеяния света

РУБ Spectroscopy
Рубрики:
X-RAY-DIFFRACTION
HYDROGEN-BOND DIMERS
POLARIZED IR-SPECTRA
Кл.слова (ненормированные):
Raman spectra -- phengite -- high pressure -- high temperature -- diamond anvil -- cell
Аннотация: The in-situ method of Raman spectroscopy was used to study the layered mineral phengite, K(Al,Mg)2(Si,Al)4O10(OH)2, compressed in water under simultaneously high temperatures and pressures (respectively, up to 373 °С and 12.5 GPa). The implemented conditions were typical of modeling the ‘cold’ subduction zones in lithospheric slabs. The high pressures and temperatures were produced in an electrically heated diamond-anvil cell. Measured Raman spectra have demonstrated a high Р–Т stability of the mineral. No non-quenchable phengite states (no reversible or irreversible polymorphic transitions, overhydration or notable amorphization) were observed in the investigated samples.

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Доп.точки доступа:
Goryainov, S. V.; Горяйнов, Сергей Владимирович; Krylov, A. S.; Крылов, Александр Сергеевич; Polyansky, O. P.; Полянский, О. П.; Vtyurin, A. N.; Втюрин, Александр Николаевич; Russian Science Foundation [15-17-30012]; International GeoRAMAN Conference(12th ; June 9-15, 2016 ; Novosibirsk, Russia)
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