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Genesis and distribution of clastic bands in the Main Coal of the Most Basin
Novotný, Tomáš ; Opluštil, Stanislav (advisor) ; Martínek, Karel (referee)
The thesis summarizes contemporary state of knowledge of genesis and distrubution of clastic bands in the Main Coal of the Most Basin. In the first part of the thesis I provide a classification and description of clastic bands including volcanoclastic and sedimentary bands. Following is the description of geology and stratigraphy of the Most Basin, and especially of the Main Coal, which contains many clastic bands. The thesis is focused mainly on the Bílina area, because the most of geologic research has been taken there.The main aim of the thesis is to distinguish various kinds of clastic bands in the Main Coal of the Most Basin, especially from genetic point of view. There are two kinds of sedimentary clastic bands. Predominant type of clastic bands in the western part of the Most basin are clastic bands related to fluvial processes of the Žatec delta. In the eastern part of the Most Basin (e.g. Bílina open-cast mine) we can distinguish two types of clastic bands. Clastic bands bounded to fluvial systems are settled in the lower and middle bench of the Main Coal. Predominating type in the upper bench are clastic bands formed during the late lake highstand when the Bílina delta started to prograde into the mire. Clastic bands in the upper bench of the Main Coal thus pass to the prodeltaic clastics...
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Genesis and paleogeographic significance of the clastic bands in the main coal of the Most Basin
Novotný, Tomáš ; Opluštil, Stanislav (advisor) ; Rojík, Petr (referee)
This diploma thesis presents first systematic geochemical a petrographical research of clastic bands in the lower-miocene Main Coal of the Most Basin. The main target of the thesis is evaluation of proxy analyses (EDXRF) of clastic bands and ash yield from coal. This method allows for identification of paleogeographic information about provenance of clastics derived from two different sources. The first source area represents weathered Tertiary volcanoclastics and the second is derived from crystalline basement in southwest part of the Bohemian Massif. Different geochemical signal of these two source areas detected in clastic bands allowed to constrain the switching of provenance into the lower part of the middle bench of the Main Coal in the Bílina open-cast mine whereas in the Doly Nástup-Tušimice mine this change occurs below the Main Coal. This result corresponds with idea of gradual changing of provenance across basin. Anomalous geochemical composition characterised by apparently increased content of Sr-Ba-P-Ca elements in one of clastic bands in the lower part of the Main Coal exposed in the Doly Nástup-Tušimice open-cast mine is related to presence of phosphate group minerals florencite and woodhouseite minerals as confirmed by RTG diffraction. This assemblage suggests possible admixture of...
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Genesis and distribution of clastic bands in the Main Coal of the Most Basin
Novotný, Tomáš ; Opluštil, Stanislav (advisor) ; Martínek, Karel (referee)
The thesis summarizes contemporary state of knowledge of genesis and distrubution of clastic bands in the Main Coal of the Most Basin. In the first part of the thesis I provide a classification and description of clastic bands including volcanoclastic and sedimentary bands. Following is the description of geology and stratigraphy of the Most Basin, and especially of the Main Coal, which contains many clastic bands. The thesis is focused mainly on the Bílina area, because the most of geologic research has been taken there.The main aim of the thesis is to distinguish various kinds of clastic bands in the Main Coal of the Most Basin, especially from genetic point of view. There are two kinds of sedimentary clastic bands. Predominant type of clastic bands in the western part of the Most basin are clastic bands related to fluvial processes of the Žatec delta. In the eastern part of the Most Basin (e.g. Bílina open-cast mine) we can distinguish two types of clastic bands. Clastic bands bounded to fluvial systems are settled in the lower and middle bench of the Main Coal. Predominating type in the upper bench are clastic bands formed during the late lake highstand when the Bílina delta started to prograde into the mire. Clastic bands in the upper bench of the Main Coal thus pass to the prodeltaic clastics...
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