|
|
Occurance of urinary stones in the CR and simulation of conditions of their rise.
Zbořilová, Eliška ; Márová, Ivana (referee) ; Vránová, Dana (advisor)
The aim of this diploma thesis was identification of urinary concrements by the infrared spectroscopy and study of conditions of formation of the most frequent urinary stones (calcium oxalates) by the thermodynamic simulation. The theoretical part of this study includes basic information about problems with urolithiasis and technique of identification of urinary concrements. Important part has been devoted to the thermodynamic simulation of formation of calcium oxalate concrements and on this simulation were determinated the conditions for formation of urinary stones. The experimental part contains analysis of real urinary concrements by the infrared spectroscopy and statistical evaluation of the file of 50 149 samples, which were analysed in years 1994 - 2010.
|
|
|
Lithology, geochemistry and metamorphic evolution of northern Hammar Domain (East-African Orogeny)
Gashe, Negessa Gonfa ; Verner, Kryštof (advisor) ; Racek, Martin (referee)
in English The studied part of the Hammar Domain is composed of the Neoproterozoic basement rocks belonging to the Southern Ethiopian Shield (SES), partly covered by volcanic and volcanosedimentary deposits of the Main Ethiopian Rift (MER). The high-grade migmatite to migmatized biotite paragneiss and amphibolites were intruded by numerous peraluminous granite and granodiorite bodies and gabbros of metaluminous composition. The results of U/Pb zircon dating of granodiorite yielded at 507.7 ± 3.2 Ma, which is interpreted as the age of magma emplacement and crystallization. The P-T estimation reveal the peak P-T conditions at ca. 1.21 to 0.88 GPa and ca. 842 to 700 řC which were followed by retrograde part P-T path (from ca. 0.84 to 0.12 GPa) with decrease of temperature from ca. 700 to 464 řC. The emplacement of gabbro in syn-tectonic settings took place at P = ca. 0.87 to 0.93 GPa and T ca. 650 řC reflecting magma emplacement to ca. 30 km in depth. Next, the syn- to post- tectonic emplacement and crystallization of biotite and amphibole-bioitite granodiorite reveal P = 0.27-0.52 GPa and T ca. 720-836. The events described above were associated with the latter period of the East-African Orogeny, which resulted in overall consolidation of the Gondwana continent.
|
|
|
Assembly of the Saxothuringian orogenic wedge: the Variscan P-T-t record of the metasediments of Erzgebirge, Bohemian Massif
Jouvent, Marine ; Lexa, Ondrej (advisor) ; Tichomirowa, Marion (referee) ; Pitra, Pavel (referee)
The formation of collisional orogenic wedges involves complex polyphase deformation and metamorphism. This study reveals the tectonic evolution, internal architecture and the timing of the Variscan orogenic wedge evolution in the Saxothuringian Domain (Bohemian Massif). The studied area is the Erzgebirge Crystalline Complex, characterized by numerous occurrences of the (U)HP rocks. In contrast, the surrounding metasediments have been scarcely studied, although they provide an important link between deep subduction and mid-crustal processes. Using field structural geology, petrology, thermodynamic modelling and geochronology (monazite U-Pb and mica 40 Ar/39 Ar dating), we constrained the P-T conditions and timing of four deformation events (D1-D4) identified by structural analysis. Several transects from the low-grade hanging wall phyllites to the footwall medium-grade micaschists have been investigated. The first M1-D1 event is characterized by HP-LT minerals (garnet, chloritoid, phengite, paragonite, and rutile) defining the S1 foliation with an M1 peak pressure conditions increasing from 13 kbar and 520řC in phyllites to 25 kbar and 560řC in micaschists. The corresponding geothermal gradient of 6-11řC/km is typical for subduction environments. The M2-D2 event corresponds to the deformation and...
|
|
|
Mineral assemblages and conditions of origin of metamorphic skarns in the Bohemian Massif
Bubal, Jan ; Dolejš, David (advisor) ; Pertoldová, Jaroslava (referee)
ENGLISH SUMMARY MINERAL ASSEMBLAGES AND CONDITIONS OF ORIGIN OF METAMORPHIC SKARNS IN THE BOHEMIAN MASSIF Calcic-iron skarns are a characteristic rock type of regional metamorphic complexes wirkude. In the Bohemian Massif, characteristic enrichment in Ca, Al, and Fe as well as mineral assemblages, textures are similar to their contact metamorphic counterparts but their origin remains unclear. In this thesis, we document petrography, mineral assemblages and chemistry of skarns and apply phase equilibrium models to reconstruct conditions of their formation. Skarns at Vlastějovice (Moldanubian zone), Malešov (Kutná Hora complex) and Měděnec (Saxothuringian zone) contain primary assemblage of garnet, clinopyroxene and magnetite, followed by crystallization of amphibole, epidote, formation of carbonate veins, and silicification. Some of these phenomena are related to the emplacement and fluid release from dykes of granitic pegmatites. Garnet represents the most abundant rock-forming minerals. Primary fine-grained aggregates (Gr30-50Alm30-40And10-30) are often recrystallized into euhedral grains or monomineralic masses with preserved chemical zoning (Gr05-30Alm1-30And40-90). At the Měděnec locality, garnets evolved towards andradite-skigaite composition. Clinopyroxene belongs to the diopside-hedenbergite series,...
|
|
|
Occurance of urinary stones in the CR and simulation of conditions of their rise.
Zbořilová, Eliška ; Márová, Ivana (referee) ; Vránová, Dana (advisor)
The aim of this diploma thesis was identification of urinary concrements by the infrared spectroscopy and study of conditions of formation of the most frequent urinary stones (calcium oxalates) by the thermodynamic simulation. The theoretical part of this study includes basic information about problems with urolithiasis and technique of identification of urinary concrements. Important part has been devoted to the thermodynamic simulation of formation of calcium oxalate concrements and on this simulation were determinated the conditions for formation of urinary stones. The experimental part contains analysis of real urinary concrements by the infrared spectroscopy and statistical evaluation of the file of 50 149 samples, which were analysed in years 1994 - 2010.
|
guest ::
