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Neovolcanic Rocks of the SW part of the Most Basin in the area of Tušimice power plant open pit
Sobotka, Martin ; Kachlík, Václav (advisor) ; Novotný, Tomáš (referee)
Diploma thesis deals with geological, petrological and geochemical studies of neovolcanic rocks of the SW part of the Most Basin in the area of Tušimice power plant open pit. There are two lava flows affected by coal mining in northern part of the mine. Petrological and geochemical studies with K-Ar dating relatively recent rocks in mostly weatherworn volcanic rocks showed, that they can be classified as Ti-rich basaltic rocks without olivine (tephrites), which belong to the main volcanic phase in the evolution of the Eger graben. It was evidenced geologicaly and with K-Ar dating, that studied rocks were seperated from underlying beda by hiatus which caused erosion of volcanic rocks as well as crystalline bedrock. Mmajor and trace elements composition of co-magmactic volcanics showed that rock were derived from two slightly different sources of upper mantle. Composition of two samples indicates the formation from low degree of partial melting strongly metasomatic asthenospheric mantle. Chemical features of volcanic rocks show that mantle source was comparamble to recent OIB basalts. Last sample arose from less metasomatized and depth distincted mantle which was affected by higher level of partial melting. Melts from which crystallized both rocks were minimaly affected by asimilation or...
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Neovolcanic Rocks of the SW part of the Most Basin in the area of Tušimice power plant open pit
Sobotka, Martin ; Kachlík, Václav (advisor) ; Novotný, Tomáš (referee)
Diploma thesis deals with geological, petrological and geochemical studies of neovolcanic rocks of the SW part of the Most Basin in the area of Tušimice power plant open pit. There are two lava flows affected by coal mining in northern part of the mine. Petrological and geochemical studies with K-Ar dating relatively recent rocks in mostly weatherworn volcanic rocks showed, that they can be classified as Ti-rich basaltic rocks without olivine (tephrites), which belong to the main volcanic phase in the evolution of the Eger graben. It was evidenced geologicaly and with K-Ar dating, that studied rocks were seperated from underlying beda by hiatus which caused erosion of volcanic rocks as well as crystalline bedrock. Mmajor and trace elements composition of co-magmactic volcanics showed that rock were derived from two slightly different sources of upper mantle. Composition of two samples indicates the formation from low degree of partial melting strongly metasomatic asthenospheric mantle. Chemical features of volcanic rocks show that mantle source was comparamble to recent OIB basalts. Last sample arose from less metasomatized and depth distincted mantle which was affected by higher level of partial melting. Melts from which crystallized both rocks were minimaly affected by asimilation or...
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Petrography and sedimentary environment of the Josef Coal (Oligocene) in the Sokolov Basin
Jureková, Dominika ; Opluštil, Stanislav (advisor) ; Mach, Karel (referee)
The Josef Coal has the largest extent of all the Coals in the Sokolov Basin. The diploma thesis is concerned with studying of two profiles of the Josef Coal located in the opencast mines Medard-Libík and Družba for the purpose of micropetrograhic and chemical analyse. The goal of the diploma thesis is an interpretation of the sedimentary enviroment leading to formation of the Josef Coal based on the comparison of the petrographic and geochemical parametres of both profiles. Both studied profiles were initially macropetrographically described and sampled in a field. Samples were subsequently used for by maceral a chemical- technological analyses. The analysis of all 50 collected samples were performed at the Institute of Rock Structure and Mechanics Academy of Sciences of the Czech Republic. The micropetrographic composition was compared with chemical-technological standards. The macropetrographic description indicates some differences between both studied coal sections. The lower part of The Profile Josef 1 consists of the humic coal which in middle part evolves into the sapropelic one and that type persists the rest of the profile. The Profile Josef 2 is formed by sapropelic coal throughout the entire section except four decimeter thick benches of intercalated humic coal. Diferences in...
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