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Chemostratigraphy of the Holešice Member in the Most basin (Miocene)
Müllerová, Eliška ; Opluštil, Stanislav (advisor) ; Martínek, Karel (referee)
The newest geochemical and sedimentological studies of the Libkovice Member in the Most Basin revealed existence of a sedimentary cyclicity that is controlled by the change of Earth's orbital parameters and the shape of its orbit. The main objective of this study is to verify the hypothesis whether there is also a similar cyclical record in strata underlying the Libkovice Member. This interval located in top of the Holešice Member consists of lacustrine sediments of a smaller extent represented by the so-called Břešťany Clays. The aim of the diploma thesis was a geochemical analysis of the concentration of selected elements measured by a mobile XRF device from the drilling cores in the stratigraphic interval between the roof of the Main Coal and the base of the Libkovice Member. Also made was a litological description of boreholes and sedimentary texture of selected clay samples. A mineralogical analysis was performed using the X-ray diffraction method. Usefulness of the XRF mobile device was proven especially for the heavier elements (e.g., Fe and Sr) and less for the lighter elements K and Ti. Nevertheless, it was possible to assign the analysed sediments to the already published chemostratigraphic subdivision of the Most Basin and to confirm its validity. The Břešťany Clays horizon was identified...
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Sedimentology and taphonomy of the Valeč locality, Oligocene.
Kunstmüllerová, Lucie ; Martínek, Karel (advisor) ; Pešek, Jiří (referee)
Title: Sedimentology and taphonomy of the Valeč locality, Oligocene. Author: Lucie Kunstmüllerová Department: Institute of geology and palaeontology Supervisor: Mgr. Karel Martínek, PhD. Consultant: RNDr. Martin Mazuch, Ph.D. Abstract: The literature research part of this bachelors thesis is devoted to an complex overview of the palaeontology and sedimentology of the Valeč locality. The following taxa of fauna were described from the locality: dormouse Bransatoglis micio, gastropods Limnaeus subpalustris thomae, cyprinids Varhostichthys brevis, Leuciscus colei a Chondrostroma stephani and pikes Esox walchanus. Floral assemblage comprise Mahonia sp., Rumohra sp., Eotrigonobalanus furcinervis, Almus rhenana, Quercus heerii, Platanus neptuni, Cinnamomum sp., Pinus ornata, Doliostrobus taxiformis, Podocarpus sp. a Tetraclinis salicornioides. The findings indicate the age after Grande Coupure event which marks the approximate age of 34 Ma (Oligocene). According to the CA analysis of the floral remains the climate was moderate and humid. The research part of the thesis included construction of the measured sedimentary section; the following sedimentary facies were distinguished: masive lapillistone with a sandy matrix (LM), cross bedded lapillistone (LSZ), lapillistone with clayey-sandy matrix (LJP), tuff (T),...
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Spatial analysis of medical data
Stramová, Andrea ; Brůha, Lukáš (advisor) ; Martínek, Karel (referee)
Nowadays, all the aspects that can influence the function of the thyroid gland are not known. Since the influence of environment on progression of many diseases is proved, this thesis deals with the influence of environmental parameters on the thyroid function. The purpose of this thesis is to propose a methodology which will describe selected medical data spatially and statistically, reveal regularities in its spatial organization and create the regression model. The special organization of the data is described by the closest neighbour's methodology and by the Local Moran`s I. Then the methodology of O2PLS, which proposes the regression model, is used. There were identified the cluster organization in the vicinity of towns. In the thesis, the regression model, which takes account of the aspects of the environment (the concentration of As, Cd, Pl, Pb and Se in water), was proposed. The influence of the other environmental parameters on the thyroid function was not proved. The thesis is a benefit mainly for the field of spatial data analysis and also for the endocrinological specialization. Owing to this thesis, the process of the way of working with sensitive medical data, that can be used for inferring important information about its connection to the spatial data, was created. Key words: Spatial...
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Facies and architecture analysis of the continental deposits of Klikov Formation, Hosín-Orty locality, Upper Cretaceous, České Budějovice Basin.
Kavková, Radana ; Martínek, Karel (advisor) ; Lojka, Richard (referee)
The Klikov Formation (Upper Cretaceous) represents the lowest stratigraphic unit of the South Bohemian basins. It provides record of continental deposits related to fluvial processes. Analysis of facies and architectures supplemented with paleocurrents data provided a basis for interpretation of depositional system exposed underground on the locality Hosín-Orty. In this study identifies sedimentary facies corresponding to high-energy river environmnent with dominance of traction current deposition are identified. Next to this, facies corresponding to low-energy deposition from suspension is preserved. From the perspective of architecture analysis depositional record represent active river channels and their fills eventuelly fills of abandoned channels. Low dispersion of paleocurrent values is consistent with a low-sinuosity river. Vertical aggradation of channels, dominance of river bars in channel-fill, downstream accretion, absence of ripples, point-bars, lateraly accreted patterns and floodplain deposits correspond with braided river environment. Stratigraphic units A, B, C, D, E, F corresponding to fluvial environment or environment of abandoned channel were distinguished. The direction of river flow is interpreted to northeast in unit A, and northwest in unit B, respectively. Autogenic and...
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Low sinuosity rivers with example of sediments of klikov formation from locality Hosín-Orty, Late Crataceous, České Budějovice basin
Kavková, Radana ; Martínek, Karel (advisor) ; Opluštil, Stanislav (referee)
The literature research part of this bachelors thesis is devoted to the definition of river styles, namely to those with low sinuosity. The aim was the description of types of deposits and diagnostic features of these rivers. Available literature, especially scientific papers devoted to fluvial sedimetology served as the sources of information for this study. Summarization of processes and products of these river styles and definition of different approaches to their study were achieved. Practical part of the thesis explores the fluvial style in Hosín-Orty region. The aim was to interpret sedimentary environment. Litology of four selected outcrops, from which fotomozaics were prepared, was studied in detail. Facies and architectural elements recognized in outcrops were defined. Furthermore, measured sedimentary sections of these outcrops were delineated. Character of sedimentary structures and the sedimentary body geometries point to river environment of sedimentation. Low spread of palaeocurrent vectors is interpreted as low sinuosity river system. The absence of structures typical for anastomosing river style finally allow us to interpret the river environment as braided. Powered by TCPDF (www.tcpdf.org)
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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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Paleoenvironmental interpretation of elemental geochemical proxies of the borehole Jp 585: Lower Miocene lacustrine offshore clays of Cypris Formation, Sokolov Basin
Erlebachová, Alice ; Martínek, Karel (advisor) ; Opluštil, Stanislav (referee)
This thesis presents geochemical study of the Lower Miocene lacustrine offshore clays of the Cypris Formation in the Sokolov Basin of the Eger Graben aimed at paleoenvironmental reconstruction. The applicability of elemental geochemistry proxies in the interpretation of 94 m thick lithologically monotonous, offshore lacustrine clay succession of the well core Jp 585 is tested. Geochemical proxy data seems to be a good indicator of changes in source areas ,erosion rates and climate. XRF analysis shows for example decrease of detrital input and the increase in amount of authigenic silica and carbonates upwards in the section. The results of CEC analysis point to a rapid variations of expandable clay minerals content. Marked increase of CEC is at 40 m depth. Combination of XRF and CEC enabled suggesting of four chemostratigraphical units. Their boundaries are often sharp, pointing to rapid changes in lake metabolism. These changes are preliminary interpreted as climate changes.
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Quaternary climate and origin of eolian deposits
Obersteinová, Tereza ; Kadlec, Jaroslav (advisor) ; Martínek, Karel (referee)
The Quaternary climatic conditions have controlled the origin of eolian deposits. The loess/paleosol sequences represent a valuable natural archives used for understanding of Quaternary climate and stratigraphy. Loess deposits cover about 10% of the continent areas. We can compare a proxy-record from these sediments, often from distant areas, to get knowledge of global significance. The applied mineral magnetic analyses enable understand the paleoenvironmental signal preserved in the loess/paleosol sequences and compare it with a proxy-record obtained from deep ocean sediments
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