Project information
Partial melting of rocks in the root zone of the Variscan orogenic belt (Moldanubian Zone, Bohemian Massif)
- Project Identification
- GA205/03/0040
- Project Period
- 1/2003 - 1/2005
- Investor / Pogramme / Project type
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Czech Science Foundation
- Standard Projects
- MU Faculty or unit
- Faculty of Science
- Keywords
- Partial Melting, Moldanubian Zone, Petrology, Geochemistry, Sr-Nd Isotopic System
Peraluminous granitic rocks formed by partial melting of metasedimentary lithologies are abundant in root zones of the orogenic belts worldwide. The proposed project aims to constrain the partial melting process with variable protoliths, degree of melting, P-T conditions and in distinct structural position within the Moldanubian Zone of the Bohemian Massif. Various stages of the process will be studied, starting from the presumed protoliths, through migmatites and diatexites, to likely restites and small leucocratic bodies. The main questions addressed will be potential sources for individual rock types, role of water and other volatiles (water saturated/undersaturated melts), mode of melting (equilibrium/disequilibrium melting), role of accessory phases, quantitative aspects (the restitic assemblage, the degree of partial melting, mass balance restite/melt) and timing. These goals should be achieved by a complex study of field relations, petrology, mineral chemistry, geothermobarometry, whole-rock major- and trace-element geochemistry, Sr–Nd–O isotopic compositions, geochronology as well as extensive numerical modelling. The obtained data will contribute to our current understanding of petrogenesis of broadly S-type granitic rocks. Inferred P-T-t evolution of the system (isobaric cooling vs. isothermal decompression) should be indicative of the tectonometamorphic evolution of the individual Moldanubian nappes (presence of external heat sources e.g. mafic intrusions vs. crustal thickening).
Publications
Total number of publications: 29
2007
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High temperature tu ultrahigh-temperature metamorpism related to multiple ultrapotassic intrusions:evidence from garnet-silimanite-cordierite kinzigite and garnet-orthopyroxene migmatites in the eastern part of the Moldanubian Zone (Bohemian Massif)
Geologica Carpathica, year: 2007, volume: 58, edition: 5
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High-pressure granulites of the Bohemian Massif: recent advances and open questions
Journal of Geosciences, year: 2007, volume: 52, edition: 1/2
2005
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Granáticko-sillimanitický kinzigit, jihlavský pluton, doklad HT až UHT metamorfozy ve východním moldanubiku
2. sjezd České geologické společnosti, Sborník abstraktů a exkurzní průvodce, year: 2005
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Granitické pegmatity Českého masívu (Česká republika); mineralogická, geochemická a regionální klasifikace a geologický význam
Acta Musei Moraviae, Sci. geol., year: 2005, volume: 90, edition: 1/2
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Highly fractionated, garnet-bearing, HREE enriched granites-pegmatites from Precambrian Brno batholith, Bohemian massif
Crystallization Processes in Granitic Pegmatites, year: 2005
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Shoshonitická až ultrapotasická gabbra jihlavského masivu
2. sjezd České geologické společnosti, Sborník abstraktů a exkurzní průvodce, year: 2005
2004
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Bohemian leucogranites and HP/HT anatexis.
Internationl workshop on petrogenesis of granulites and related rocks., year: 2004
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Ca diffusion in garnets and its application to the intrepretation of pressure and temperatures histories of tectonic events
A.von Humboldt Foundation Introductory meeting, year: 2004
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Cooling history oh high presure granulites from Bohemian Massif derived from retrograde zoning in garnets.
32 nd IGC, year: 2004
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Geology without Frontiers:Magmatic and Metamorphic Evolution of Central European Variscides.
Episodes, year: 2004, volume: 27, edition: 1