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Genetic relationships between intrusions of porphyry dykes and formation of Au ores at Petrov and Bohuliby
Petrov, Ivan ; Zachariáš, Jiří (advisor) ; Slobodník, Marek (referee)
This master's thesis is focused on genetic relationships between Au-bearing ores and associated granodiorite porphyry dykes in Petrov and Bohuliby area in southwestern part of the Jílové ore district. Subvolcanic rocks with hydrothermally induced alteration and Au/bearing mineralization were characterized by petrography, mineralogy and crystallochemistry. Mutual genetic and textural relationships of studied materials were examined as well and were validated by biotite, arsenopyrite and chlorite empirical geothermometry. First identified generation of sulfide mineralization was formed at 360řC and consist of arsenopyrite, galenite and native gold. At circa 274řC porphyry mineral association was chloritized, and chlorite gangue crystallized. Second generation of sulfide mineralization precipitated at 264řC. Anomalous absence of Bi-Te-S phases and scheelite in hydrothermal paragenesis is important indicator of contrasting conditions of mineralization at the studied areas and main zone of the Jílové ore deposit. Based on acquired data, granodiorite porphyry dikes were categorized to two separate genetic types, which have mutual origin in deep magma chamber of Central Bohemian Plutonic Complex but intruded non-contemporaneously.
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Exogenic alteration of geomaterials with anomalous content of hazardous elements
Udatný, Martin
of dissertation thesis Exogenic alteration of geomaterials with anomalous content of hazardous elements The research of waste materials from high temperature processes belongs to current issues solved in the field of modern environmental geochemistry. Current research has mainly been focused on fly ash and bottom ash coming from metallurgy, combustion and other industrial processes. In these wastes of different grain size, accumulation of hazardous elements occurs. These elements may be present in low concentrations in combusted coal or municipal solid waste or it may come from ore processing. Hazardous compounds are also intentionally added during the technological process (e.g. making of lead glass). Modern industrial plants are equipped with effective filtration systems, but this might not be in the past. In the Czech Republic and elsewhere in the world old environmental burdens are and will be addressed. Current modern filtration systems are never 100% efficient. Contamination of surrounding environment in a lesser extent can still occur. The production of lead glass (Bohemian Crystal) is based on the addition of lead compounds in the glass raw material. Additions of these substances providing a high refractive index of the finished product. Also compounds containing other hazardous elements...
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Genetic relationships between intrusions of porphyry dykes and formation of Au ores at Petrov and Bohuliby
Petrov, Ivan ; Zachariáš, Jiří (advisor) ; Slobodník, Marek (referee)
This master's thesis is focused on genetic relationships between Au-bearing ores and associated granodiorite porphyry dykes in Petrov and Bohuliby area in southwestern part of the Jílové ore district. Subvolcanic rocks with hydrothermally induced alteration and Au/bearing mineralization were characterized by petrography, mineralogy and crystallochemistry. Mutual genetic and textural relationships of studied materials were examined as well and were validated by biotite, arsenopyrite and chlorite empirical geothermometry. First identified generation of sulfide mineralization was formed at 360řC and consist of arsenopyrite, galenite and native gold. At circa 274řC porphyry mineral association was chloritized, and chlorite gangue crystallized. Second generation of sulfide mineralization precipitated at 264řC. Based on acquired data, granodiorite porphyry dikes were categorized to two separate genetic types, which have mutual origin in deep magma chamber of Central Bohemian Plutonic Complex but intruded non-contemporaneously.
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Paraphrase classical artwork - a didactic transformation and application of topics in art education
Košatová, Barbora ; Šmíd, Jan (advisor) ; Sedlák, Michal (referee)
IN ENGLISH This thesis has the character of theoretical studies on the topic paraphrase a classic work of art and its subsequent didactic applications for that grade school. It solves the problems of paraphrasing in the visual arts. It characterizes the aspects related to the topic, such as analysis and structure of a work of art. It focuses on the theory of shape as the basic building blocks of artwork and associated topics, which are: quotes, interpretation, image transformations and alterations. Art work is a continuation of a previous bachelor thesis, which dealt with the issue of land. It deals with the transformation of the original image resulting from the help of manipulation of individual shapes in the image, replacing the existing design to a new one. They are created in the form of the photographs from the area of pre-defined landscape Didactic section applies subject paraphrase the selected school and verifies and theoretical knowledge in practice. It depicts the topic paraphrase as a whole. The objective is to try and understand the basic principles that apply to paraphrase.
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Bicy-colonization: A symmetrical ethnography of the development project Kola pro Afriku (Czech Bikes for Gambian Schools)
Werner, Jan ; Stöckelová, Tereza (advisor) ; Brož, Luděk (referee)
This study is a symmetrical ethnography of the Czech development project Kola pro Afriku (Czech Bikes for Gambian Schools), which involves the collection, repairs, modification and shipment of old Czech bicycles to The Gambia. Once there, they are distributed to partner schools and offered to communing pupils. In my research, I mainly focus on the pivotal technology of the project, bicycles, and their performances. Drawing on classic ethnographies of development and (most importantly) on studies based on the actor-network theory (ANT), I gradually explore the bike collection process, their modifications and repairs, their shipment to The Gambia and their local operations. When doing so, I focus on the social topology of the bicycles and its transformations in the timespace. In this regard, the bicycles gradually appear as junk (i.e. a dysfunctional relict of stabilized networks), as a fluid collectivity and as individually fluid. Thereby, this study shows that technology transfers may lead not only to changes in the set of relations, of which the given object consists, but in the very modes, in which those relations arise. It is precisely these topological transformations that significantly contribute to the functioning of the project Kola pro Afriku. Key words: development cooperation,...
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Radioactive accessory minerals in granitoids and its changes during metamorphosis and alteration.
Tuhý, Marek ; Goliáš, Viktor (advisor) ; Matějka, Dobroslav (referee)
This paper is focused on gathering information about alterations of radioactive accessory minerals in granitic rocks. These minerals become unstable during the influence of fluids and increased temperature and pressure conditions. Allanite is usually metamict therefore it is more easily altered than others. Alteration of monazite is described as decomposing original grains which leads to the formation of secondary minerals such as allanite, apatite, minerals of thorium and epidote. Zircon is the most durable mineral mentioned in this paper. Zircon is altered mainly if it is metamict. Majority of authors agree that during alteration uranium is mobilized into fluids and thorium with REE is incorporate into the secondary minerals.
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Exogenic alteration of geomaterials with anomalous content of hazardous elements
Udatný, Martin ; Mihaljevič, Martin (advisor) ; Strnad, Ladislav (referee) ; Vaněk, Aleš (referee)
of dissertation thesis Exogenic alteration of geomaterials with anomalous content of hazardous elements The research of waste materials from high temperature processes belongs to current issues solved in the field of modern environmental geochemistry. Current research has mainly been focused on fly ash and bottom ash coming from metallurgy, combustion and other industrial processes. In these wastes of different grain size, accumulation of hazardous elements occurs. These elements may be present in low concentrations in combusted coal or municipal solid waste or it may come from ore processing. Hazardous compounds are also intentionally added during the technological process (e.g. making of lead glass). Modern industrial plants are equipped with effective filtration systems, but this might not be in the past. In the Czech Republic and elsewhere in the world old environmental burdens are and will be addressed. Current modern filtration systems are never 100% efficient. Contamination of surrounding environment in a lesser extent can still occur. The production of lead glass (Bohemian Crystal) is based on the addition of lead compounds in the glass raw material. Additions of these substances providing a high refractive index of the finished product. Also compounds containing other hazardous elements...
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Mineralogy and genesis of gold ores hosted by porphyry dykes at Petrov and Bohuliby
Petrov, Ivan ; Zachariáš, Jiří (advisor) ; Strnad, Ladislav (referee)
This bachelor thesis is focused on mineralogy and genesis of Au-bearing ores in southwestern part of the Jílové ore district, in between Petrov and Bohuliby. Crystallization sequence of hydrothermal minerals was identified by textural relationships of mineral phases. Arsenopyrite and chlorite thermometry suggest formation of sulphides and gold at 400-300 řC. Within the scope of this thesis the paragenesis of rock-forming minerals of granodiorite porphyry dikes hosting Au-bearing ores, as well as of late-magmatic to hydrothermal minerals filling in miarolitic cavities in these porphyries, were also interpreted. A hypothesis of granodiorite dikes' origin is suggested as well, involving mixing of magmas with different geochemical signatures.
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Bicy-colonization: A symmetrical ethnography of the development project Kola pro Afriku (Czech Bikes for Gambian Schools)
Werner, Jan ; Stöckelová, Tereza (advisor) ; Brož, Luděk (referee)
This study is a symmetrical ethnography of the Czech development project Kola pro Afriku (Czech Bikes for Gambian Schools), which involves the collection, repairs, modification and shipment of old Czech bicycles to The Gambia. Once there, they are distributed to partner schools and offered to communing pupils. In my research, I mainly focus on the pivotal technology of the project, bicycles, and their performances. Drawing on classic ethnographies of development and (most importantly) on studies based on the actor-network theory (ANT), I gradually explore the bike collection process, their modifications and repairs, their shipment to The Gambia and their local operations. When doing so, I focus on the social topology of the bicycles and its transformations in the timespace. In this regard, the bicycles gradually appear as junk (i.e. a dysfunctional relict of stabilized networks), as a fluid collectivity and as individually fluid. Thereby, this study shows that technology transfers may lead not only to changes in the set of relations, of which the given object consists, but in the very modes, in which those relations arise. It is precisely these topological transformations that significantly contribute to the functioning of the project Kola pro Afriku. Key words: development cooperation,...
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Paraphrase classical artwork - a didactic transformation and application of topics in art education
Košatová, Barbora ; Šmíd, Jan (advisor) ; Sedlák, Michal (referee)
IN ENGLISH This thesis has the character of theoretical studies on the topic paraphrase a classic work of art and its subsequent didactic applications for that grade school. It solves the problems of paraphrasing in the visual arts. It characterizes the aspects related to the topic, such as analysis and structure of a work of art. It focuses on the theory of shape as the basic building blocks of artwork and associated topics, which are: quotes, interpretation, image transformations and alterations. Art work is a continuation of a previous bachelor thesis, which dealt with the issue of land. It deals with the transformation of the original image resulting from the help of manipulation of individual shapes in the image, replacing the existing design to a new one. They are created in the form of the photographs from the area of pre-defined landscape Didactic section applies subject paraphrase the selected school and verifies and theoretical knowledge in practice. It depicts the topic paraphrase as a whole. The objective is to try and understand the basic principles that apply to paraphrase.
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