P-T evolution and reaction textures in retrogressed eclogites from Svetlik, the Moldanubian Zone (Czech Republic)

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dc.contributor.author Faryad, SW en
dc.contributor.author Perraki, M en
dc.contributor.author Vrana, S en
dc.date.accessioned 2014-03-01T02:44:08Z
dc.date.available 2014-03-01T02:44:08Z
dc.date.issued 2006 en
dc.identifier.issn 0930-0708 en
dc.identifier.uri http://hdl.handle.net/123456789/31703
dc.subject Granulite Facies en
dc.subject Mass Balance en
dc.subject Czech Republic en
dc.subject Ultra High Pressure en
dc.subject.classification Geochemistry & Geophysics en
dc.subject.classification Mineralogy en
dc.subject.other BOHEMIAN MASSIF en
dc.subject.other CARBONACEOUS MATERIAL en
dc.subject.other ULTRAHIGH PRESSURES en
dc.subject.other TECTONIC EVOLUTION en
dc.subject.other SOLID-SOLUTION en
dc.subject.other RAMAN-SPECTRA en
dc.subject.other CLINOPYROXENE en
dc.subject.other GRANULITES en
dc.subject.other GRAPHITE en
dc.title P-T evolution and reaction textures in retrogressed eclogites from Svetlik, the Moldanubian Zone (Czech Republic) en
heal.type conferenceItem en
heal.identifier.primary 10.1007/s00710-006-0142-8 en
heal.identifier.secondary http://dx.doi.org/10.1007/s00710-006-0142-8 en
heal.language English en
heal.publicationDate 2006 en
heal.abstract Lenses and pods of mafic rocks from the Monotonous Unit near Svetlik are characterized by eclogite facies mineral assemblages; however some inclusion patterns (oriented quartz rods in clinopyroxene and cuboids of disordered graphite in garnet) that are usually known from ultra-high pressure rocks were also observed in one sample. Conventional thermobarometry yielded maximum P-T conditions of 2.0-2.5 GPa and 750°C. Decompression and heating at amphibolite and granulite facies conditions resulted in the formation of at least five distinct types of symplectites. These include symplectitic intergrowth of ilmenite and clinopyroxene after titanite, described here for the first time from the Moldanubian Zone. In addition, symplectites of plagioclase and biotite with accessory amounts of spinel after tabular pseudomorphs (after phengite?) are also reported here. Mass balance relations indicate that symplectites of diopside + plagioclase after omphacite and plagioclase + spinel (sapphirine) after kyanite + garnet, formed by nearly isochemical reactions. All other symplectite-forming reactions were allochemical and were accelerated by the presence of fluid in the primary phases. Preserved zoning pattern in garnet with high compositional gradient in some samples suggests that the rocks were affected briefly by granulite facies overprint. © Springer-Verlag 2006. en
heal.publisher SPRINGER WIEN en
heal.journalName Mineralogy and Petrology en
dc.identifier.doi 10.1007/s00710-006-0142-8 en
dc.identifier.isi ISI:000241174000015 en
dc.identifier.volume 88 en
dc.identifier.issue 1-2 en
dc.identifier.spage 297 en
dc.identifier.epage 319 en

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