Štípská, P. , Závada, P. , Collett, S. , Kylander-Clark, A.R.C., Hacker, B.R., Tabaud, A.-S. and Racek, M. 2020. Eocene migmatite formation and diachronous burial revealed by petrochronology in NW Himalaya, Zanskar. Journal of Metamorphic Geology. 38, 655–691.
DOI Google ScholarMelting the metagranitoids: important but poorly understood aspect of crust evolution
Melting processes in metagranitoids will be investigated by answering following questions: 1. Is the pervasive melt flow on grain boundaries the major melt transport mechanism in metagranitoids, instead of interconnected leucosome network known from metasediments? 2. Do the large melt quantities in metagranitoids result from fluid-fluxed melting and how the fluids entre the migmatites? Are dehydration melting and fluid-fluxed domains contemporaneous or superimposed? 3. What are the consequences of fluid-fluxed melting on melt generation, melt quantities, melt ascent, evolution of density stratification within the crust and therefore on crustal-scale exhumation mechanisms? The questions will be answered by studying of rock textural variations, related whole rock and mineral chemistry variations including REE and Sr/Nd isotopes, mapping melt pathways from crustal- to microscale, comparison of observed/modelled melt quantities in relation to H2O amount, variation in ages and REE of zircon and monazite. Consequences on exhumation at crustal-scale will be studied by analogue modelling.
Period
-Registration number
16-17457SProvider
GAČRBudget
153 000 EURPrincipal investigators
Dr. Pavla ŠtípskáProject publications
Nahodilová, R. , Hasalová, P. , Štípská, P. , Schulmann, K. , Závada, P. , Míková, J. , Kylander-Clark, A. and Maierová, P. 2020. Exhumation of subducted continental crust along the arc region. Gondwana Research. 80, 157–187.
DOI Google ScholarKrýza, O. , Závada, P. and Lexa, O. 2019. Advanced strain and mass transfer analysis in crustal-scale oroclinal buckling and detachment folding analogue models. Tectonophysics. 764, 88–109.
DOI Google ScholarŠtípská, P. , Hasalová, P. , Powell, R. , Závada, P. , Schulmann, K. , Racek, M. , Aguilar, C. and Chopin, F. 2019. The Effect of Melt Infiltration on Metagranitic Rocks: the Snieznik Dome, Bohemian Massif. Journal of Petrology. 60, 591–618.
Google ScholarZávada, P. , Schulmann, K. , Racek, M. , Hasalová, P. , Jeřábek, P. , Weinberg, R.F., Štípská, P. and Roberts, A. 2018. Role of strain localization and melt flow on exhumation of deeply subducted continental crust. Lithosphere. 10, 217–238.
DOI Google ScholarSola, A.M., Hasalová, P. , Weinberg, R.F., Suzaño, N.O., Becchio, R.A., Hongn, F.D. and Botelho, N. 2017. Low-P melting of metapelitic rocks and the role of H2O: Insights from phase equilibria modelling. Journal of Metamorphic Geology. 35, 1131–1159.
DOI Google ScholarZávada, P. , Calassou, T. , Schulmann, K. , Hrouda, F. , Štípská, P. , Hasalová, P. , Míková, J. , Magna, T. and Mixa, P. 2017. Magnetic fabric transposition in folded granite sills in Variscan orogenic wedge. Journal of Structural Geology. 94, 166–183.
DOI Google ScholarFinch, M.A., Weinberg, R.F., Hasalová, P. , Becchio, R. , Fuentes, G. and Kennedy, A. 2017. Tectono-metamorphic evolution of a convergent back-arc: The Famatinian orogen, Sierra de Quilmes, Sierras Pampeanas, NW Argentina. Geological Society of America Bulletin. 129, 1602–1621.
DOI Google ScholarLehmann, J. , Schulmann, K. , Lexa, O. , Závada, P. , Štípská, P. , Hasalová, P. , Belyanin, G. and Corsini, M. 2017. Detachment folding of partially molten crust in accretionary orogens: A new magma-enhanced vertical mass and heat transfer mechanism. Lithosphere. 9, 889.
DOI Google ScholarWolfram, L. , Weinberg, R. , Hasalová, P. and Becchio, R. 2017. How Melt Segregation Affects Granite Chemistry: Migmatites from the Sierra de Quilmes, NW Argentina. Journal of Petrology. 58, 2339–2364.
DOI Google Scholar