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Fabrics and geodynamic evolution of orthogneisses in the Moldanubian Zone
Kryl, Jakub ; Verner, Kryštof (advisor) ; Venera, Zdeněk (referee)
Fabrics and geodynamic evolution of Moldanubian orthogneisses English abstract The aim of this paper is a structural analysis of selected mostly Cambro-Ordovician orthogneisses cropping out in a part of high-grade rocks of western Moldanubian Zone. These rocks have been affected by HT-MP/LP metamorphism and the polyphase deformation during the Variscan orogeny. In the blaník orthogneisses, (Qtz + Kfs + Plg + Bt ± Ms ± Sill ± Ky) an early deformation banding dips steeply to SSE to ESE. These fabrics were overprinted by NW to N gently dipping foliation with well developed stretching lineations plunging to W. Rare kinematic indicators (e. g. fold and pressure shadows asymmetry) reveal a strong subvertical contraction and stretching in the ~N-S direction. Based on the microstructural analysis this contractional event was connected with the activity of "Grain Boundary Migration Recrystallization" (GBM). Ductile shear zones dipping to E, locally ESE or ENE were identified. Bechyně orthogneisses (Qtz + Kfs + Plg + Bt ± Ms) is a N-S elongated body with the presence of regional pervasive metamorphic foliation dipping homogenously under low angles from SSW to WNW . These foliations bear well developed mineral or stretching lineation of quartz, biotite and feldspar aggregates plunging to ~SW. In the blaník orthogneiss...
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Geodynamic evolution and post-collisional magmatic activity in the Arabian-Nubian Shield (East African Orogeny) and southwestern Moldanubian Zone (Central European Variscides)
Megerssa, Leta Alemayehu ; Verner, Kryštof (advisor) ; Závada, Prokop (referee) ; Johnson, Kenneth (referee)
The Variscan orogenic belt along the exhumed root domain, known as the Moldanubian Zone as well as the Arabian-Nubian Shield (ANS) in the East African Orogeny (EAO) of Ethiopia, are considered as typical areas for studying late-orogenic (post-collisional) processes and magmatism. Based on a wider range of field and analytical methods: field structural mapping, anisotropy of magnetic susceptibility (AMS) analysis, thermobarometric calculation and P-T evolution, conventional U/Pb dating, a reconstruction of geodynamic evolution and magmatism in the southwestern part of Moldanubian Zone (Bohemian Massif) and Tokar-Barka Terrain (southern part of Arabian-Nubian Shield is undertaken. The Variscan case portrays the peculiar overprint by the Late Orogenic tectonothermal event which is absent in the case of the Arabian-Nubian Shield (ANS) hence offering a compelling contrast to investigate the possible underlying mechanism involved for the different processes in the post-orogenic phase. In the southern ANS a post-collisional intrusive Chewo pluton composed of monzodiorite and quartz monzonite marks the late tectonic overprint which intruded into a low-grade Neoproterozoic juvenile crustal Tokar-Barka terrane. Thermobarometric estimations indicate its emplacement to be c. 10-13 Km depth, idealized from AMS...
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Geodynamic evolution and emplacement of Eisgarn - type granitoids (Moldanubian Batholith)
Paclíková, Jana ; Verner, Kryštof (advisor) ; Franěk, Jan (referee)
English abstract This diploma thesis deals mainly with identification of magmatic (respectively magnetic) fabrics, geodynamical aspects of emplacement and geochronology of the Eisgarn granitoids. For the analysis Klenov and Mrákotín pluton were chosen, which is placed in the eastern part of the Moldanubian Batholith. This thesis contains petrological and mezoscopic structural analysis of the host metamorphic rocks of the Moldanubian Unit and it includes calculation of P-T conditions of the main mineral assemblage. This is followed by petrological, geochemical and mezoscopic structural analysis of the Klenov and Mrákotín pluton and analysis of the anisotropy of magnetic susceptibility, geochronology of the Klenov pluton, gravimetry analysis and determination of the orientation of density interfaces in different depths. Granitoids of the Klenov and Mrákotín pluton are characterized as S-type granitoids, whose protolith were probably metasedimentary rocks. From the analysis it is also evident that the Klenov pluton records lower degree of magma fractionation than the Mrákotín pluton. The emplacement and crystallization of both studied magmatic bodies took place in cooperation with a development of regional metamorphic fabrics, which originate between 329 and 327 Ma. During this period a rapid exhumation of...
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Petrogenesis and emplacement of post-collisional granitoids of southeastern Moldanubian Batholith
Hájek, Tadeáš ; Verner, Kryštof (advisor) ; Houzar, Stanislav (referee)
The Weinsberg Composite Pluton, located in the southern part of the Moldanubian Batholith is a large intrusive body with complex internal fabrics, petrogenesis and emplacement processes. On the basis of geochemistry and zircon morphology classification the dominating lithology in the northeastern part of the pluton seems to be the second type of the Weinsberg granitoids (WbG II). Based on the integration of the structural, petrological and geochemical data set acquired from the investigated area, the interpretation of geodynamic evolution and emplacement of the eastern part of the Weinsberg Pluton could be proposed. This interpretation invokes: (a) indentation and underthrusting of a continental microplate (Brunia) in the east at around ~340-330 Ma, driving mantle delamination and subsequent heating and anatexis in the metapelitic lower crust as the heterogeneous source for Weinsberg- and Eisgarn-types of granitoids; (b) subsequent growth of a large metamorphic dome along the edge of the Brunia indentor followed by polyphase emplacement of entire eastern part of the Moldanubian Batholith around ~330-325 Ma including the Weinsberg Composite Pluton in the south; (c) increasing role of the N-S shortening and associated NW-SE dextral shearing along localized shear zones which caused the prevailing...
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Mineral and chemical changes of magma crystallization during formation of post-Variscan intrusions and veins in the Moldanubian Zone of the Bohemian Massif
Kubínová, Šárka ; Faryad, Shah Wali (advisor) ; Rapprich, Vladislav (referee) ; Moyen, Jean-François (referee)
- 1 - English abstract The late-Variscan magnesium-rich potassic to ultrapotassic igneous rocks create numerous dykes, dyke swarms and several plutonic bodies at the boundary between the Moldanubian Zone and the Teplá-Barrandian Block of the Bohemian Massif. They represent a volumetrically smaller group of igneous rock but they are the key to understand generation of melt and processes of mantle metasomatism and shallow-level magma differentiation. In addition, they are considered as an indicator of the tectonic evolution of this part of the Bohemian Massif during the final stages of the Variscan orogenesis. Currently, they are the subject of discussion by several authors in terms of their genesis, emplacement time and geodynamic significance. The presented thesis is a compilation of four scientific publications that are aimed at the petrological study of selected (ultra)-potassic dyke rocks from several localities at the western border of the Moldanubian Zone. The study of mineral textures, mineral chemistry and whole-rock geochemistry together with magnetic fabrics, structural field relations and age determinations allowed us to describe the crystallization history of these rocks, discuss their evolution from melt generation to magma ascent and emplacement, and form the model of sequence of Variscan...
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Assessment of the suitability of the site for the location of the SNF and RAW deep geological repository in terms of long-term safety - Dukovany - West site\n(EDU-Z).
Havlová, V. ; Pertoldová, J. ; Bukovská, Z. ; Hroch, T. ; Štědrá, V. ; Jankovec, J. ; Říha, J. ; Červinka, R. ; Černý, M. ; Dudková, A. ; Dušek, K. ; Franěk, J. ; Gondolli, J. ; Gvoždík, L. ; Hokr, M. ; Holeček, J. ; Hrdličková, K. ; Jelének, J. ; Jelínek, J. ; Kachlíková, R. ; Kaláb, Zdeněk ; Klajmon, M. ; Kolomá, K. ; Královcová, J. ; Kouřil, M. ; Kryštofová, E. ; Kučera, R. ; Kunceová, E. ; Maryška, J. ; Milický, M. ; Nývlt, D. ; Ondra, P. ; Pacherová, P. ; Polák, M. ; Rapprich, V. ; Rukavičková, L. ; Sedláčková, I. ; Vašíček, R. ; Vavro, Martin ; Vopálka, D. ; Uhlík, J. ; Zeman, J. ; Zeman, O.
This report summarises outline of a report for evaluation of the sites suitability for the emplacement of a deep geological repository on the basis of the archive information and the geological survey conducted from surface.\nSites are evaluated according to the following criterion categories\n1. Geological characteristics of the site\n2. Hydrogeologic characteristics of the site\n3. Transport characteristics of the the site\n4. Site stability\n5. Factors, increasing probability of human intrusion into the site\n6. Acceptability of enginnered barrier properties under site conditions
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Rating the suitability of the site for the location of the SNF and RAW deep geological repository in terms of of long-term safety - locality Březový Potok.
Havlová, V. ; Pertoldová, J. ; Bukovská, Z. ; Hroch, T. ; Štědrá, V. ; Baier, J. ; Říha, J. ; Červinka, R. ; Černý, M. ; Dudková, I. ; Dušek, K. ; Franěk, J. ; Gondolli, J. ; Gvoždík, L. ; Hokr, M. ; Holeček, J. ; Jankovec, J. ; Jelínek, J. ; Kachlíková, R. ; Kaláb, Zdeněk ; Klajmon, M. ; Kolomá, K. ; Kouřil, M. ; Královcová, J. ; Kučera, R. ; Kunceová, E. ; Maryška, J. ; Milický, M. ; Nývlt, D. ; Ondra, P. ; Polák, M. ; Rapprich, V. ; Rukavičková, L. ; Soejono, I. ; Steinová, J. ; Svoboda, J. ; Šír, P. ; Švagera, O. ; Uhlík, J. ; Vavro, Martin ; Vašíček, R. ; Vopálka, D. ; Zeman, J. ; Zeman, O.
This report summarises outline of a report for evaluation of the sites‘ suitability for the emplacement of a deep geological repository on the basis of the archive information and the geological survey conducted from surface.\nSites are evaluated according to the following criterion categories\n1. Geological characteristics of the site\n2. Hydrogeologic characteristics of the site\n3. Transport characteristics of the the site\n4. Site stability\n5. Factors, increasing probability of human intrusion into the site\n6. Acceptability of enginnered barrier properties under site conditions
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Assessing the location of a location for placement of deep geological repository of RAW and RAW in terms of long-term safety - Temelín - South site (ETE-J)
Havlová, V. ; Pertoldová, J. ; Hroch, T. ; Štědrá, V. ; Jankovec, J. ; Říha, J. ; Červinka, R. ; Baier, J. ; Černý, M. ; Dudková, I. ; Dušek, K. ; Franěk, J. ; Gondolli, J. ; Gvoždík, L. ; Hokr, M. ; Holeček, J. ; Jelínek, J. ; Kachlíková, R. ; Kaláb, Zdeněk ; Klajmon, M. ; Kolomá, K. ; Královcová, J. ; Kučera, R. ; Kryštofová, E. ; Maryška, J. ; Milický, M. ; Ondra, P. ; Pacherová, P. ; Peřestý, V. ; Polák, M. ; Řihošek, J. ; Rukavičková, L. ; Steinová, J. ; Svoboda, J. ; Šír, P. ; Uhlík, J. ; Vašíček, R. ; Vavro, Martin ; Vopálka, D. ; Zeman, O.
This report summarises outline of a report for evaluation of the sites‘ suitability for the emplacement of a deep geological repository on the basis of the archive information and the geological survey conducted from surface.\nSites are evaluated according to the following criterion categories\n1. Geological characteristics of the site\n2. Hydrogeologic characteristics of the site\n3. Transport characteristics of the the site\n4. Site stability\n5. Factors, increasing probability of human intrusion into the site\n6. Acceptability of enginnered barrier properties under site conditions
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Assessment of the suitability of the site for the location of the SNF deep geological repository and RAW in terms of long-term safety - Magdaléna site.
Havlová, V. ; Pertoldová, J. ; Bukovská, Z. ; Hroch, T. ; Štědrá, V. ; Černý, M. ; Říha, J. ; Červinka, R. ; Dudková, I. ; Dušek, K. ; Franěk, J. ; Gondolli, J. ; Gvoždík, L. ; Hokr, M. ; Holeček, J. ; Jankovec, J. ; Jelének, J. ; Jelínek, J. ; Kachlíková, R. ; Kaláb, Zdeněk ; Kouřil, M. ; Královcová, J. ; Klajmon, M. ; Kolomá, K. ; Kučera, R. ; Kunceová, E. ; Maryška, J. ; Milický, M. ; Nývlt, D. ; Ondra, P. ; Pacherová, P. ; Polák, M. ; Rapprich, V. ; Rukavičková, L. ; Steinová, J. ; Svoboda, J. ; Šír, P. ; Švagera, O. ; Vašíček, R. ; Vavro, Martin ; Vopálka, D. ; Uhlík, J. ; Zeman, J. ; Zeman, O.
This report summarises outline of a report for evaluation of the sites‘ suitability for the emplacement of a deep geological repository on the basis of the archive information and the geological survey conducted from surface.\nSites are evaluated according to the following criterion categories\n1. Geological characteristics of the site\n2. Hydrogeologic characteristics of the site\n3. Transport characteristics of the the site\n4. Site stability\n5. Factors, increasing probability of human intrusion into the site\n6. Acceptability of enginnered barrier properties under site conditions
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