Ormond, R. , Lehmann, J. , Hasalová, P. and Elburg, M. 2024. Migmatite dome as a result of multi-fold interference pattern, in the Damara Belt, Namibia. Journal of Structural Geology. 180, 105059.
DOI Google ScholarCLR person interests, research and publications
Researcher
Dr. Pavlína Hasalová
Research fellow
Metamorphic petrology and Microstructures
+420257089492
pavlina.hasalova@geology.cz
RID:
G-4494-2014
About me
I am a metamorphic petrologist focusing on origin of migmatitic rocks and related melt transport through continental crust. I am interested how melt can move in felsic rock and what impact does it have for the crustal rheology and deformation. I study particular type of melt flow, so-called “porous melt flow” and my aim is to define conditions at which this melt transport can operate. My work is combination of field work, microscopic observations, microstructural analysis, petrochronology and geochemistry. Field areas I am focusing on are large migmatitic terranes in Bohemian Massif (Czech Republic), Vosges Mts. (France), Himalaya (India) and recently also Namibia.
Research interests
- Melt transport and segregation in the crust
- Origin of migmatitic rocks
- Thermodynamic modelling of melt (fluid)-rock interaction
- Crustal anatexis in high-grade metamorphic terranes
- Role of fluids in metamorphism and melting
- Strain localization and partitioning in shear zones
Research projects
Pervasive melt migration in continental crust: a micro-scale process with large-scale implications
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Melt migration is the key process transferring mass, heat and volatiles from the Earth’s depth towards the surface, and therefore shaping the chemical and thermal structure of the lithosphere. Common understanding of crustal melt migration is biased towards mechanisms that can be easily identified as they preserve macroscopic segregations of melt in outcrops, such as in dykes or leucosome-bearing migmatites. In contrast, recent observations show that micro-scale pervasive flow of melt along grain boundaries can affect significant portions of hot continental crust.
Generation, extent, and longevity of magma mush columns
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We need to determine what is the structure of magmatic systems that underlay volcanoes in order to understand how volcanic eruptions are fed from depth and how mineral resources associated to igneous rocks are generated. The current paradigm is that transient pockets of crystal-poor magma form in extended columns of crystal-rich magma mush.
Granulite-migmatite domes - insight into the Devonian and Carboniferous development of the Variscan belt
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We aim to study and compare various aspects that are related to exhumation of deeply buried felsic rocks that form now Devonian and Carboniferous granulite-migmatite domes in the Variscan belt and contributed thus to large-scale crustal differentiation. The role of melting on the rheological weakening of the rocks is known for a long time, but differences of the melting processes of metasedimentary rocks and granitoid rocks, with respect to fluid-present, dehydration and fluid-fluxed melting and relation to the P-T path of the rocks are rarely studied simultaneously.
Principal mechanisms of peripheral continental growth during supercontinent cycle
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The growth of eastern Pangea involves three contrasting orogenic cycles: 1) Baikalian cycle (570-540 Ma) consists of accretion of peri-Rodinian continental, Mirovoi and Panthalassan oceanic fragments to the Siberian margin followed by extensional HT reworking, the growth of magmatic arc, giant accretionary wedge and intraoceanic basin. 2) Altai cycle is typified by crustal thickening followed by syn-extensional melting of the accretionary wedge (420-380 Ma) and the opening of Mongol-Okhotsk ocean.
Understanding of high pressure fluid present melting of metagranitoids: examples from Eger crystalline and Kutna Hora crystalline complexes
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The aim of this project is to better understand partial melting of felsic rocks at high pressure. We will use examples of Eger and Kutná Hora Crystalline Complexes, which both consist of HPHT migmatites, granulites and orthogneisses.
Melting the metagranitoids: important but poorly understood aspect of crust evolution
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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.
Tracking magmas from source to pluton: new insight into granites diversity
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Melting of the crust leads to granitic magmas that vary widely in composition and in ability to generate metal deposits or cause explosive volcanism. A number of superposing, competing processes control this variability. Much has been learnt from investigating processes late in the magma history, but not much is known about magma generation at depth and what happens to it during transport to the upper crust. Indirect knowledge or inferences based on little data, leads to speculation and controversies.
The role of Paleozoic accretionary and collisional orogens on the formation and growth of continental crust
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Selected segments of Euroasian orogenic system are used to constrain relative contribution of contrasting processes of continental construction in collisional and accretionary orogenic systems. Principal objectives of the proposal are: (i) identification of the individual terranes, kinematic analysis of their movements and characterization of deformation style connected with their amalgamation; (ii) estimation of net crustal growth vs. recycling of preexistent crustal material.
Prograde metamorphism, crustal thickening and lower crustal flow: new concept of building of crustal root in Variscan orogen
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The aim of this project is to carry out large-scale investigations of mechanisms and processes related to crustal thickening and formation of thick crustal root of large hot orogens exemplified by the Bohemian Massif. Our recent studies in Bohemian Massif showed that the formation of thickened continental crust was related to massive relamination of lower plate felsic crust followed by crustal thickening.
Microstructural and chemical reappraisal of mineralogical inheritance in partially molten rocks: implication of AMS resetting in granitoids in central Vosges
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The goal of the study is to complement existing AMS and geochronological data from the Vosges Mts., France, by well-focused microstructural study of potential old mineralogical inheritance in the Vosges main granitoids. This project aims to develop a method that will allow to determine the proportion and microstructural appearance of inherited “xenocrysts” and of new melt derived crystals in partially molten rocks and then implement this method on the Vosges granitoids.
Publications
Maierová, P. , Hasalová, P. , Schulmann, K. , Štípská, P. and Souček, O. 2023. Porous melt flow in continental crust—A numerical modeling study. Journal of Geophysical Research - Solid Earth. 128, 1–25.
DOI Google ScholarZávada, P. , Štípská, P. , Hasalová, P. , Racek, M. , Jeřábek, P. , Schulmann, K. , Kylander-Clark, A. and Holder, R. 2021. Monazite geochronology in melt-percolated UHP meta-granitoids: An example from the Erzgebirge continental subduction wedge, Bohemian Massif. Chemical Geology. 559, 119919.
DOI Google ScholarWeinberg, R.F., Wolfram, L.C., Nebel, O. , Hasalová, P. , Závada, P. , Kylander-Clark, A.R. and Becchio, R. 2020. Decoupled U-Pb date and chemical zonation of monazite in migmatites: The case for disturbance of isotopic systematics by coupled dissolution-reprecipitation. Geochimica et Cosmochimica Acta. 269, 398–412.
DOI Google ScholarNahodilová, 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 ScholarŠtípská, P. , Hasalová, P. , Jeřábek, P. , Lexa, O. , Lardeaux, J.-M. , Sun, M. and Cosgrove, J. 2020. Thermal and mechanical evolution of collisional and accretionary orogens: a volume in honour of Karel Schulmann—an introduction. 109, 1099–1103.
Google ScholarAguilar, C. , Štípská, P. , Chopin, F. , Schulmann, K. , Pitra, P. , Závada, P. , Hasalová, P. and Martelat, J.-E. 2020. Syn-deformational melt percolation through a high-pressure orthogneiss and the exhumation of a subducted continental wedge (Orlica-Śnieżnik Dome, NE Bohemian Massif). International Journal of Earth Sciences. 109, 34.
DOI Google ScholarRegmi, K. , Hasalová, P. and Nicholls, I. 2020. Was the Tynong Batholith, Lachlan Orogen, Australia, extremely hot? Application of pseudosection modelling and TitaniQ geothermometry. Journal of GeosciencesJ. Geosci. 65, 121–138.
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 ScholarWolfram, L.C., Weinberg, R.F., Nebel, O. , Hamza, K. , Hasalová, P. , Míková, J. and Becchio, R. 2019. A 60-Myr record of continental back-arc differentiation through cyclic melting. Nature Geoscience. 12, 215–219.
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 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 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 ScholarHunter, N.J., Hasalová, P. , Weinberg, R.F. and Wilson, C.J. 2016. Fabric controls on strain accommodation in naturally deformed mylonites: The influence of interconnected micaceous layers. Journal of Structural Geology. 83, 180–193.
DOI Google ScholarŠtípská, P. , Hacker, B. , Racek, M. , Holder, R. , Kylander-Clark, A. , Schulmann, K. and Hasalová, P. 2015. Monazite Dating of Prograde and Retrograde P-T-d paths in the Barrovian terrane of the Thaya window, Bohemian Massif. Journal of Petrology.
Google ScholarFinch, M. , Weinberg, R. , Fuentes, M.G., Hasalová, P. and Becchio, R. 2015. One kilometre-thick ultramylonite, Sierra de Quilmes, Sierras Pampeanas, NW Argentina. Journal of Structural Geology. 33–54.
Google ScholarBroussolle, A. , Štípská, P. , Lehmann, J. , Schulmann, K. , Hacker, B. , Holder, R. , Kylander-Clark, A. , Hanzl, P. , Racek, M. , Hasalová, P. , Lexa, O. , Hrdličková, K. and Burianek, D. 2015. P-T-t-D record of crustal-scale horizontal flow and magma assisted doming in the SW Mongolian Altai. Journal of Metamorphic Geology. 359–383.
DOI Google ScholarFinch, M. , Weinberg, R. , Fuentes, M.G., Hasalová, P. and Becchio, R. 2015. Reply to comment by S.H. Büttner on: „One kilometre-thick ultramylonite, Sierra de Quilmes, Sierras Pampeanas, NW Argentina.“. Journal of Structural Geology.
DOI Google ScholarWeinberg, R. and Hasalová, P. 2015. Water-Fluxed Melting of the Continental Crust: a Review. Lithos. 158–188.
Google ScholarWillcock, M.A.W., Mattei, M. , Hasalová, P. , Giordano, G. , Cas, R.A.F. and Morelli, C. 2015. Flow behaviour in the intra-caldera setting: an AMS study of the large (>1290 km3) Permian Ora ignimbrite. Geological Society, London, Special Publications. 396, 177–204.
DOI Google ScholarKusbach, V. , Janoušek, V. , Hasalová, P. , Schulmann, K. , Fanning, C.M., Erban, V. and Ulrich, S. 2015. Importance of crustal relamination in origin of the orogenic mantle peridotite-high-pressure granulite association: example from the Náměšť Granulite Massif (Bohemian Massif, Czech Republic). Journal of the Geological Society (London).
DOI Google ScholarHasalová, P. , Schulmann, K. , Tabaud, A.S. and Oliot, E. 2015. Microstructural evidences for mineralogical inheritance in partially molten rocks: example from the Vosges Mts. Bulletin de la Société Géologique de France. 186, 131–143.
DOI Google ScholarGuy, A. , Schulmann, K. , Clauer, N. , Hasalová, P. , Seltmann, R. , Armstrong, R. , Lexa, O. and Benedicto, A. 2014. Late Paleozoic-Mesozoic tectonic evolution of the Trans-Altai and South Gobi Zones in southern Mongolia based on structural and geochronological data. Gondwana Research. 25, 309–337.
Google ScholarFinch, M. , Hasalová, P. , Weinberg, R. and Fanning, C.M. 2014. Switch from thrusting to normal shearing in the Zanskar shear zone, NW Himalaya: Implications for channel flow. Geological Society of America Bulletin. B30817–1.
DOI Google ScholarWeinberg, R. , Hasalová, P. , Ward, L. and Fanning, C.M. 2013. Interaction between deformation and magma extraction in migmatites: Examples from Kangaroo Island, South Australia. Geological Society of America Bulletin. 125, 1282–1300.
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