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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
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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