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Is quartz a potential indicator of ultrahigh-pressure metamorphism? Laser Raman spectroscopy of quartz inclusions in ultrahigh-pressure garnets

Andrey V. Korsakov, Maria Perraki, Vladimir P. Zhukov, Kris de Gussem, Peter Vandenabeele and Anatoly A. Tomilenko
Is quartz a potential indicator of ultrahigh-pressure metamorphism? Laser Raman spectroscopy of quartz inclusions in ultrahigh-pressure garnets (in Twenty-five years of ultrahigh-pressure metamorphism, Hans-Peter Schertl (editor), Jane A. Gilotti (editor), Simon J. Cuthbert (editor) and Alexei Perchuk (editor))
European Journal of Mineralogy (November 2009) 21 (6): 1313-1323

Abstract

Laser Raman microspectroscopy was applied to quartz inclusions in coesite- and diamond-grade metapelites from the Kokchetav ultrahigh-pressure metamorphic (UHPM) complex, Northern Kazakhstan, and diamond-grade eclogite xenoliths from the Mir kimberlite pipe, Yakutiya, Russia to assess the quantitative correlation between the Raman frequency shift and metamorphic pressure. Quartz crystals sealed in garnets have a higher frequency shift than those in the matrix. Residual pressures retained by quartz inclusions depend on the metamorphic history of the garnet host. The Raman frequency shift of quartz inclusions in garnet from coesite-grade and diamond-grade metamorphic rocks shows no systematic change with increasing peak metamorphic pressures. The highest shifts of the main Raman bands of quartz were documented for monocrystalline quartz inclusions in garnets from a diamond-grade eclogite xenolith. Calibrations based on experimental work suggest that the measured Raman frequency shifts signify residual pressures of 0.1-0.6 GPa for quartz inclusions from coesite-grade metapelites from Kokchetav, 0.1-0.3 GPa for quartz inclusions from diamond-grade metapelites from Kokchetav, and 1.0-1.2 GPa for quartz inclusions from the diamond-grade eclogite xenoliths from the Mir kimberlite pipe. Normal stresses and internal (residual) pressures of quartz inclusions in garnet were numerically simulated with a 3-shell elastic model. Estimated values of residual pressures are inconsistent with the residual pressures estimated from the frequency shifts. Residual pressure slightly depends on P-T conditions at peak metamorphic stage. Laser Raman microspectroscopic analysis of quartz is a potentially powerful method for recovering an ultrahigh pressure metamorphic event. Monocrystalline quartz inclusions yielding a residual pressure greater than 2.5 GPa might indicate the presence of a former coesite.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 21
Serial Issue: 6
Title: Is quartz a potential indicator of ultrahigh-pressure metamorphism? Laser Raman spectroscopy of quartz inclusions in ultrahigh-pressure garnets
Title: Twenty-five years of ultrahigh-pressure metamorphism
Author(s): Korsakov, Andrey V.Perraki, MariaZhukov, Vladimir P.de Gussem, KrisVandenabeele, PeterTomilenko, Anatoly A.
Author(s): Schertl, Hans-Petereditor
Author(s): Gilotti, Jane A.editor
Author(s): Cuthbert, Simon J.editor
Author(s): Perchuk, Alexeieditor
Affiliation: Russian Academy of Sciences, Siberian Branch, Institute of Geology and Mineralogy, Novosibirsk, Russian Federation
Affiliation: Ruhr-Universitaet Bochum, Bochum, Federal Republic of Germany
Pages: 1313-1323
Published: 200911
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 56
Accession Number: 2010-022553
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
N52°45'00" - N53°15'00", E68°30'00" - E70°19'60"
Secondary Affiliation: University of Iowa, USA, United StatesUniversity of the West of Scotland, GBR, United KingdomMoscow State University, RUS, Russian FederationNational Technical University of Athens, GRC, GreeceGhent University, BEL, Belgium
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201014
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