Projects

Publications

2017

  1. Buriánek, D.; Schulmann, K.; Hrdličková, K.; Hanžl, P.; Janoušek, V.; Gerdes, A. and Lexa, O. Geochemical and geochronological constraints on distinct Early-Neoproterozoic and Cambrian accretionary events along southern margin of the Baydrag Continent in western Mongolia. In Gondwana Research, 47: 200-227, 2017.
  2. Maierová, P.; Lexa, O.; Jeřábek, P.; Schulmann, K. and Franěk, J. Computational study of deformation mechanisms and grain size evolution in granulites--Implications for the rheology of the lower crust. In Earth and Planetary Science Letters, 466: 91-102, 2017.
  3. Peřestý, V; Lexa, O; Holder, R; Jeřábek, P; Racek, M; Štípská, P; Schulmann, K and Hacker, B Metamorphic inheritance of Rheic passive margin evolution and its early Variscan overprint in the Tepl'a-Barrandian Unit, Bohemian Massif. In Journal of Metamorphic Geology, 2017.
  4. Racek, M; Lexa, O; Schulmann, K; Corsini, M; Štípská, P and Maierová, P Re-evaluation of polyphase kinematic and 40Ar/39Ar cooling history of Moldanubian hot nappe at the eastern margin of the Bohemian Massif. In International Journal of Earth Sciences, 106 (2): 397-420, 2017.

2016

  1. Buriánek, D.; Janoušek, V.; Hanžl, P.; Jiang, Y.; Schulmann, K.; Lexa, O. and Altanbaatar, B. Petrogenesis of the late carboniferous sagsai pluton in the SE Mongolian Altai. In Journal of Geosciences (Czech Republic), 61 (1): 67-92, 2016.
  2. Hanžl, P.; Schulmann, K.; Janoušek, V.; Lexa, O.; Hrdličková, K.; Jiang, Y.; Buriánek, D.; Altanbaatar, B.; Ganchuluun, T. and Erban, V. Making continental crust: Origin of Devonian orthogneisses from SE Mongolian Altai. In Journal of Geosciences (Czech Republic), 61 (1): 25-50, 2016.
  3. Jiang, YD; Schulmann, K; Sun, M; Štípská, P; Guy, A; Janoušek, V; Lexa, O and Yuan, C Anatexis of accretionary wedge, Pacific-type magmatism, and formation of vertically stratified continental crust in the Altai Orogenic Belt. In Tectonics, 35 (12): 3095-3118, 2016.
  4. Maierová, P.; Schulmann, K.; Lexa, O.; Guillot, S.; Štípská, P.; Janoušek, V. and čadek, O. European Variscan orogenic evolution as an analogue of Tibetan-Himalayan orogen: Insights from petrology and numerical modeling. In Tectonics, 35 (7): 1760-1780, 2016.

2015

  1. Broussolle, A.; Štípská, P.; Lehmann, J.; Schulmann, K.; Hacker, B. R.; Holder, R.; Kylander-Clark, A. R. C.; Hanžl, P.; Racek, M.; Hasalová, P.; Lexa, O.; Hrdličková, K. and Buriánek, D. P-T-t-D record of crustal-scale horizontal flow and magma-assisted doming in the SW Mongolian Altai. In Journal of Metamorphic Geology, 33 (4): 359-383, 2015. doi 
  2. Edel, J-B.; Schulmann, K.; Lexa, O.; Diraison, M. and Géraud, Y. Permian clockwise rotations of the Ebro and Corso-Sardinian blocks during Iberian-Armorican oroclinal bending: Preliminary paleomagnetic data from the Catalan Coastal Range (NE Spain). In Tectonophysics, 657: 172-186, 2015. doi 
  3. Guy, A.; Schulmann, K.; Janoušek, V.; Štípská, P.; Armstrong, R.; Belousova, E.; Dolgopolova, A.; Seltmann, R.; Lexa, O.; Jiang, Y. and Hanžl, P. Geophysical and geochemical nature of relaminated arc-derived lower crust underneath oceanic domain in southern Mongolia. In Tectonics, 34 (5): 1030-1053, 2015.
  4. Hurai, V.; Paquette, J.-L.; Lexa, O.; Konečný, P. and Dianiška, I. U-Pb-Th geochronology of monazite and zircon in albitite metasomatites of the Rožňava-Nadabula ore field (Western Carpathians, Slovakia): implications for the origin of hydrothermal polymetallic siderite veins. In Mineralogy and Petrology, 2015. doi 
  5. Novotná, N.; Jeřábek, P.; Pitra, P.; Lexa, O. and Racek, M. Repeated slip along a major decoupling horizon between crustal-scale nappes of the Central Western Carpathians documented in the Ochtiná tectonic mélange. In Tectonophysics, 646: 50-64, 2015. doi 
  6. Závada, P.; Desbois, G.; Urai, J.; Schulmann, K.; Rahmati, M; Lexa, O. and Wollenberg, U Impact of solid second phases on deformation mechanisms of naturally deformed salt rocks (Kuh-e-Namak, Dashti, Iran) and rheological stratification of the Hormuz Salt Formation. In Journal of Structural Geology, 74: 117-144, 2015. doi 

2014

  1. Edel, J-B.; Schulmann, K.; Hanžl, P. and Lexa, O. Palaeomagnetic and structural constraints on 90° anticlockwise rotation in SW Mongolia during the Permo-Triassic: Implications for Altaid oroclinal bending. Preliminary palaeomagnetic results. In Journal of Asian Earth Sciences, 94: 157-171, 2014.
  2. Guy, A.; Schulmann, K.; Clauer, N.; Hasalová, P.; Seltmann, R.; Armstrong, R.; Lexa, O. and Benedicto, A. Late Paleozoic–Mesozoic tectonic evolution of the Trans-Altai and South Gobi Zones in southern Mongolia based on structural and geochronological data. In Gondwana Research, 25 (1): 309-337, 2014. doi 
  3. Guy, A.; Schulmann, K.; Munschy, M.; Miehe, J-M.; Edel, J-B.; Lexa, O. and Fairhead, D. Geophysical constraints for terrane boundaries in southern Mongolia. In Journal of Geophysical Research B: Solid Earth, 119 (10), 2014.
  4. Lardeaux, J-M.; Schulmann, K.; Faure, M.; Janoušek, V.; Lexa, O.; Skrzypek, E.; Edel, J-B. and Štípská, P. The Moldanubian Zone in the French Massif Central, Vosges/Schwarzwald and Bohemian Massif revisited: differences and similarities. In Geological Society, London, Special Publications, 405 (1): 7-44, 2014. doi 
  5. Maierová, P.; Lexa, O.; Schulmann, K. and Štípská, P. Contrasting tectono-metamorphic evolution of orogenic lower crust in the Bohemian Massif: A numerical model. In Gondwana Research, 25 (2): 509-521, 2014. doi 
  6. Oliot, E.; Goncalves, P.; Schulmann, K.; Marquer, D. and Lexa, O. Mid-crustal shear zone formation in granitic rocks: Constraints from quantitative textural and crystallographic preferred orientations analyses. In Tectonophysics, 612-613: 63-80, 2014. doi 
  7. Schulmann, K.; Lexa, O.; Janoušek, V.; Lardeaux, J-M. and Edel, J-B. Anatomy of a diffuse cryptic suture zone: An example from the Bohemian Massif, European Variscides. In Geology, 42 (4): 275-278, 2014. doi 
  8. Štípská, P.; Powell, R.; Racek, M. and Lexa, O. Intermediate granulite produced by transformation of eclogite at a felsic granulite contact, in Blanský les, Bohemian Massif. In Journal of Metamorphic Geology, 32 (4): 347-370, 2014. doi 

2013

  1. Bukovská, Z.; Jeřábek, P.; Lexa, O.; Konopásek, J.; Janák, M. and Košler, J. Kinematically unrelated C—S fabrics: an Lexample of extensional shear band cleavage from the Veporic Unit (Western Carpathians). In Geologica Carpathica, 64 (2): 103-116, 2013. doi 
  2. Lehmann, J.; Schulmann, K.; Edel, J-B.; Ježek, J.; Hrouda, F.; Lexa, O. and Chopin, F. Structural and anisotropy of magnetic susceptibility records of granitoid sheets emplacement during growth of a continental gneiss dome (Central Sudetes, European Variscan Belt). In Tectonics, 32 (3): 797-820, 2013. doi 
  3. Staněk, M.; Géraud, Y.; Lexa, O.; špaček, P.; Ulrich, S. and Diraison, M. Elastic anisotropy and pore space geometry of schlieren granite: direct 3-D measurements at high confining pressure combined with microfabric analysis. In Geophysical Journal International, 194 (1): 383-394, 2013. doi 

2012

  1. Chopin, F.; Schulmann, K.; Skrzypek, E.; Lehmann, J.; Dujardin, J-R.; Martelat, J-E.; Lexa, O.; Corsini, M.; Edel, J-B.; Štípská, P. and Pitra, P. Crustal influx, indentation, ductile thinning and gravity redistribution in a continental wedge: Building a Moldanubian mantled gneiss dome with underthrust Saxothuringian material (European Variscan belt). In Tectonics, 31 (1): 1-27, 2012. doi 
  2. Chopin, F.; Schulmann, K.; Štípská, P.; Martelat, J-E.; Pitra, P.; Lexa, O. and Petri, B. Microstructural and metamorphic evolution of a high-pressure granitic orthogneiss during continental subduction (Orlica-'Snie.znik dome, Bohemian Massif). In Journal of Metamorphic Geology, 30 (4): 347-376, 2012. doi 
  3. Faryad, W. S. and Lexa, O. Meeting report. In Elements, 8 (2), 2012.
  4. Jeřábek, P.; Lexa, O.; Schulmann, K. and Plašienka, D. Inverse ductile thinning via lower crustal flow and fold-induced doming in the West Carpathian Eo-Alpine collisional wedge. In Tectonics, 31 (TC5002): doi:10.1029/2012TC003097, 2012. doi 
  5. Maierová, P.; Čadek, O.; Lexa, O. and Schulmann, K. A numerical model of exhumation of the orogenic lower crust in the Bohemian Massif during the Variscan orogeny. In Studia Geophysica et Geodaetica, 56 (2): 595-619, 2012. doi 
  6. Závada, P.; Desbois, G.; Schwedt, A.; Lexa, O. and Urai, J. Extreme ductile deformation of fine-grained salt by coupled solution-precipitation creep and microcracking: Microstructural evidence from perennial Zechstein sequence (Neuhof salt mine, Germany). In Journal of Structural Geology, 37: 89-104, 2012. doi 
  7. Štípská, P.; Chopin, F.; Skrzypek, E.; Schulmann, K.; Pitra, P.; Lexa, O.; Martelat, J-E.; Bollinger, C. and žáčková, E. The juxtaposition of eclogite and mid-crustal rocks in the Orlica-'Snie.znik Dome, Bohemian Massif. In Journal of Metamorphic Geology, 30 (2): 213-234, 2012. doi 

2011

  1. Franěk, J.; Schulmann, K.; Lexa, O.; Tomek, . and Edel, J-B. Model of syn-convergent extrusion of orogenic lower crust in the core of the Variscan belt: implications for exhumation of high-pressure rocks in large hot orogens. In Journal of Metamorphic Geology, 29 (1): 53-78, 2011. doi 
  2. Franěk, J.; Schulmann, K.; Lexa, O.; Ulrich, S.; Štípská, P.; Haloda, J. and Týcová, P. Origin of felsic granulite microstructure by heterogeneous decomposition of alkali feldspar and extreme weakening of orogenic lower crust during the Variscan orogeny. In Journal of Metamorphic Geology, 29 (1): 103-130, 2011. doi 
  3. Guy, A.; Edel, J-B.; Schulmann, K.; Tomek, . and Lexa, O. A geophysical model of the Variscan orogenic root (Bohemian Massif): Implications for modern collisional orogens. In Lithos, 124 (1-2): 144-157, 2011. doi 
  4. Lexa, O.; Schulmann, K.; Janoušek, V.; Štípská, P.; Guy, A. and Racek, M. Heat sources and trigger mechanisms of exhumation of HP granulites in Variscan orogenic root. In Journal of Metamorphic Geology, 29 (1): 79-102, 2011. doi 
  5. Skrzypek, E.; Schulmann, K.; Štípská, P.; Chopin, F.; Lehmann, J.; Lexa, O. and Haloda, J. Tectono-metamorphic history recorded in garnet porphyroblasts: insights from thermodynamic modelling and electron backscatter diffraction analysis of inclusion trails. In Journal of Metamorphic Geology, 29 (4): 473-496, 2011. doi 
  6. Skrzypek, E.; Štípská, P.; Schulmann, K.; Lexa, O. and Lexová, M. Prograde and retrograde metamorphic fabrics - a key for understanding burial and exhumation in orogens (Bohemian Massif). In Journal of Metamorphic Geology, 29 (4): 451-472, 2011. doi 
  7. Závada, P.; Dědeček, P.; Mach, K.; Lexa, O. and Potužák, M. Emplacement dynamics of phonolite magma into maar-diatreme structures — Correlation of field, thermal modeling and AMS analogue modeling data. In Journal of Volcanology and Geothermal Research, 201 (1-4): 210-226, 2011. doi 

2010

  1. Hurai, V.; Chovan, M.; Huraiová, M.; Koděra, P.; Konečný, P. and Lexa, O. Slovak Ore Mountains: Origin of hydrothermal mineralization and environmental impacts of mining. In Acta Mineralogica-Petrographica, 28: 1-36, 2010.
  2. Kratinová, Z.; Ježek, J.; Schulmann, K.; Hrouda, F.; Shail, R. K. and Lexa, O. Noncoaxial K-feldspar and AMS subfabrics in the Land's End granite, Cornwall: Evidence of magmatic fabric decoupling during late deformation and matrix crystallization. In Journal of Geophysical Research, 115 (B9): B09104, 2010. doi 
  3. Kröner, A.; Lehmann, J.; Schulmann, K.; Demoux, A.; Lexa, O.; Tomurhuu, D.; Štípská, P.; Liu, D. and Wingate, M. T. D. Lithostratigraphic and geochronological constraints on the evolution of the Central Asian Orogenic Belt in SW Mongolia: Early Paleozoic rifting followed by late Paleozoic accretion. In American Journal of Science, 310 (7): 523-574, 2010. doi 
  4. Lehmann, J.; Schulmann, K.; Lexa, O.; Corsini, M.; Kröner, A.; Štípská, P.; Tomurhuu, D. and Otgonbator, D. Structural constraints on the evolution of the Central Asian Orogenic Belt in SW Mongolia. In American Journal of Science, 310 (7): 575-628, 2010. doi 
  5. Štípská, P.; Schulmann, K.; Lehmann, J.; Corsini, M.; Lexa, O. and Tomurhuu, D. Early Cambrian eclogites in SW Mongolia: evidence that the Palaeo-Asian Ocean suture extends further east than expected. In Journal of Metamorphic Geology, 28 (9): 915-933, 2010. doi 

2009

  1. Schulmann, K.; Edel, J-B.; Hasalová, P.; Cosgrove, J.; Ježek, J. and Lexa, O. Influence of melt induced mechanical anisotropy on the magnetic fabrics and rheology of deforming migmatites, Central Vosges, France. In Journal of Structural Geology, 31 (10): 1223-1237, 2009. doi 
  2. Schulmann, K.; Konopásek, J.; Janoušek, V.; Lexa, O.; Lardeaux, J-M.; Edel, J-B.; Štípská, P. and Ulrich, S. An Andean type Palaeozoic convergence in the Bohemian Massif. In Comptes Rendus Geosciences, 341 (2-3): 266-286, 2009. doi 
  3. Závada, P.; Schulmann, K.; Lexa, O.; Hrouda, F.; Haloda, J. and Týcová, P. The mechanism of flow and fabric development in mechanically anisotropic trachyte lava. In Journal of Structural Geology, 31 (11): 1295-1307, 2009. doi 

2008

  1. Hasalová, P.; Schulmann, K.; Lexa, O.; Štípská, P.; Hrouda, F.; Ulrich, S.; Haloda, J. and Týcová, P. Origin of migmatites by deformation-enhanced melt infiltration of orthogneiss: a new model based on quantitative microstructural analysis. In Journal of Metamorphic Geology, 26 (1): 29-53, 2008. doi 
  2. Hasalová, P.; Štípská, P.; Powell, R.; Schulmann, K.; Janoušek, V. and Lexa, O. Transforming mylonitic metagranite by open-system interactions during melt flow. In Journal of Metamorphic Geology, 26 (1): 55-80, 2008. doi 
  3. Hurai, V.; Lexa, O.; Schulmann, K.; Montigny, R.; Prochaska, W.; Frank, W.; Konečný, P.; Kráľ, J.; Thomas, R. and Chovan, M. Mobilization of ore fluids during Alpine metamorphism: evidence from hydrothermal veins in the Variscan basement of Western Carpathians, Slovakia. In Geofluids, 8 (3): 181-207, 2008. doi 
  4. Hurai, V.; Prochaska, W.; Lexa, O.; Schulmann, K.; Thomas, R. and Ivan, P. High-density nitrogen inclusions in barite from a giant siderite vein: implications for Alpine evolution of the Variscan basement of Western Carpathians, Slovakia. In Journal of Metamorphic Geology, 26 (4): 487-498, 2008. doi 
  5. Jeřábek, P.; Faryad, W. S.; Schulmann, K.; Lexa, O. and Tajčmanová, L. Alpine burial and heterogeneous exhumation of Variscan crust in the West Carpathians: insight from thermodynamic and argon diffusion modelling. In Journal of the Geological Society, 165 (2): 479-498, 2008. doi 
  6. Schulmann, K.; Lexa, O.; Štípská, P.; Racek, M.; Tajčmanová, L.; Konopásek, J.; Edel, J-B.; Peschler, A. and Lehmann, J. Vertical extrusion and horizontal channel flow of orogenic lower crust: key exhumation mechanisms in large hot orogens?. In Journal of Metamorphic Geology, 26 (2): 273-297, 2008. doi 
  7. Schulmann, K.; Martelat, J-E.; Ulrich, S.; Lexa, O.; Štípská, P. and Becker, J. Evolution of microstructure and melt topology in partially molten granitic mylonite: Implications for rheology of felsic middle crust. In Journal of Geophysical Research, 113 (B10): 1-20, 2008. doi 

2007

  1. Jeřábek, P.; Stünitz, H.; Heilbronner, R.; Lexa, O. and Schulmann, K. Microstructural-deformation record of an orogen-parallel extension in the Vepor Unit, West Carpathians. In Journal of Structural Geology, 29 (11): 1722-1743, 2007. doi 
  2. Závada, P.; Schulmann, K.; Konopásek, J.; Ulrich, S. and Lexa, O. Extreme ductility of feldspar aggregates—Melt-enhanced grain boundary sliding and creep failure: Rheological implications for felsic lower crust. In Journal of Geophysical Research, 112 (B10): B10210, 2007. doi 

2006

  1. Franěk, J.; Schulmann, K. and Lexa, O. Kinematic and rheological model of exhumation of high pressure granulites in the Variscan orogenic root: example of the Blanský les granulite, Bohemian Massif, Czech Republic. In Mineralogy and Petrology, 86 (3-4): 253-276, 2006. doi 
  2. Racek, M.; Štípská, P.; Pitra, P.; Schulmann, K. and Lexa, O. Metamorphic record of burial and exhumation of orogenic lower and middle crust: a new tectonothermal model for the Drosendorf window (Bohemian Massif, Austria). In Mineralogy and Petrology, 86 (3-4): 221-251, 2006. doi 

2005

  1. Baratoux, L.; Lexa, O.; Cosgrove, J. and Schulmann, K. The quantitative link between fold geometry, mineral fabric and mechanical anisotropy: as exemplified by the deformation of amphibolites across a regional metamorphic gradient. In Journal of Structural Geology, 27 (4): 707-730, 2005. doi 
  2. Baratoux, L.; Schulmann, K.; Ulrich, S. and Lexa, O. Contrasting microstructures and deformation mechanisms in metagabbro mylonites contemporaneously deformed under different temperatures (c. 650 C and c. 750 C). In Geological Society, London, Special Publications, 243 (1): 97-125, 2005. doi 
  3. Lexa, O.; Štípská, P.; Schulmann, K.; Baratoux, L. and Kröner, A. Contrasting textural record of two distinct metamorphic events of similar P-T conditions and different durations. In Journal of Metamorphic Geology, 23 (8): 649-666, 2005. doi 
  4. Schulmann, K.; Kröner, A.; Hegner, E.; Wendt, I.; Konopásek, J.; Lexa, O. and Štípská, P. Chronological constraints on the pre-orogenic history, burial and exhumation of deep-seated rocks along the eastern margin of the Variscan Orogen, Bohemian Massif, Czech Republic. In American Journal of Science, 305 (5): 407-448, 2005. doi 

2004

  1. Engelder, T.; Schulmann, K. and Lexa, O. Indentation pits: a product of incipient slip on joints with a mesotopography. In Geological Society, London, Special Publications, 231 (1): 315, 2004.
  2. Lexa, O.; Cosgrove, J. and Schulmann, K. Apparent shear-band geometry resulting from oblique fold sections. In Journal of Structural Geology, 26 (1): 155-161, 2004. doi 

2003

  1. Konopásek, J.; Schulmann, K. and Lexa, O. Reply to comments by A. Krohe and A.P. Willner on "Structural evolution of the central part of the Krušné Hory (Erzgebirge) Mountains in the Czech Republic-evidence for changing stress regime during Variscan compression" [Journal of Structural Geology 23. In Journal of Structural Geology, 25 (6): 1005-1007, 2003. doi 
  2. Lexa, O.; Schulmann, K. and Ježek, J. Cretaceous collision and indentation in the West Carpathians: View based on structural analysis and numerical modeling. In Tectonics, 22 (6): 1066, 2003. doi 
  3. Schulmann, K.; Thompson, A. B.; Lexa, O. and Ježek, J. Strain distribution and fabric development modeled in active and ancient transpressive zones. In Journal of Geophysical Research, 108 (B1): 1-15, 2003. doi 

2001

  1. Konopásek, J.; Schulmann, K. and Lexa, O. Structural evolution of the central part of the Krušné hory (Erzgebirge) Mountains in the Czech Republic—evidence for changing stress regime during Variscan compression. In Journal of Structural Geology, 23 (9): 1373-1392, 2001. doi 

2000

  1. Nemčok, M.; Konečný, P. and Lexa, O. Calculations of tectonic, magmatic and residual stress in the štiavnica stratovolcano, Western Carpathians: Implications for mineral precipitation paths. In Geologica Carpathica, 51 (1): 19-36, 2000.