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

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dc.contributor.author Korsakov, AV en
dc.contributor.author Perraki, M en
dc.contributor.author Zhukov, VP en
dc.contributor.author De Gussem, K en
dc.contributor.author Vandenabeele, P en
dc.contributor.author Tomilenko, AA en
dc.date.accessioned 2014-03-01T01:30:58Z
dc.date.available 2014-03-01T01:30:58Z
dc.date.issued 2009 en
dc.identifier.issn 0935-1221 en
dc.identifier.uri http://hdl.handle.net/123456789/19694
dc.subject 3-shell elastic model en
dc.subject Coesite en
dc.subject Diamond en
dc.subject Quartz en
dc.subject Raman spectroscopy en
dc.subject Residual pressure en
dc.subject UHPM petrology en
dc.subject.classification Mineralogy en
dc.subject.other coesite en
dc.subject.other crystal structure en
dc.subject.other diamond en
dc.subject.other garnet en
dc.subject.other kimberlite en
dc.subject.other metapelite en
dc.subject.other quartz en
dc.subject.other Raman spectroscopy en
dc.subject.other ultrahigh pressure metamorphism en
dc.subject.other xenolith en
dc.subject.other Kazakhstan en
dc.subject.other Kokchetav en
dc.subject.other Russian Federation en
dc.subject.other Sakha en
dc.title Is quartz a potential indicator of ultrahigh-pressure metamorphism? Laser Raman spectroscopy of quartz inclusions in ultrahigh-pressure garnets en
heal.type journalArticle en
heal.identifier.primary 10.1127/0935-1221/2009/0021-2006 en
heal.identifier.secondary http://dx.doi.org/10.1127/0935-1221/2009/0021-2006 en
heal.language English en
heal.publicationDate 2009 en
heal.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 gamet 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 diamondgrade eclogite xenoliths from the Mir kimberlite pipe. Normal stresses and internal (residual) pressures of quartz inclusions in gamet 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. © 2009 E. Schweizerbart'sche Verlagsbuchhandlung,. en
heal.journalName European Journal of Mineralogy en
dc.identifier.doi 10.1127/0935-1221/2009/0021-2006 en
dc.identifier.isi ISI:000274438400015 en
dc.identifier.volume 21 en
dc.identifier.issue 6 en
dc.identifier.spage 1313 en
dc.identifier.epage 1323 en

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