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Deformation history and decomposition of ternary feldspar in the proto-phase of the Blanský les felsic granulite evolution
Jirků, Markéta ; Jeřábek, Petr (advisor) ; Závada, Prokop (referee)
This diploma thesis deals with the oldest recognized deformation microstructure of felsic granulites of Blanský les (southern Bohemian Massif) in order to understand their lower crustal deformation history later altered during exhumation. Moreover, the study is focused on decomposition of ternary feldspars in the proto-phase of evolution of granulite microstructure. Based on the structural and microstructural analyses of the less developed cleavage I. and the more developed cleavage II., it was possible to distinguish between two deformation structures. The S1 is defined by compositional banding of alternating quartz bands with bands rich in plagioclase, garnets and with porphyroclasts of alkaline feldspars. The S1 cleavage is transposed into the S2 cleavage. During intense reworking of S1 into S2, the quartz bands were decomposed and recrystallized into the ribbons. The feldspar thermometry of the cleavage I. and II. allowed to distinguish the three stages of decomposition of feldspars. A continuous temperature decrease was observed as reflected by the individual microstructures. The quantitative microstructural analysis indicate the shape preferred orientation of the grain boundaries of two-feldspar matrix. The shape preferred orientation of cleavage I. is controlled by the albite rim, however after its...
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Record of assimilation of migmatite xenoliths in the Lipnice granite
Jirků, Markéta ; Jeřábek, Petr (advisor) ; Jedlička, Radim (referee)
This bachelor thesis presents new results on characterization of migmatite xenoliths assimilation, which occurs in the heterogeneous Lipnice granite of the Melechov massif in form of lenses, schlierens and biotite clusters, and aims to identify the relicts of assimilated migmatites in the homogeneous granite. The thesis consists of three main chapters. The first one focuses on a broad introduction into the geology central European Variscides, brief characterization of the Bohemian Massif, lithology of Moldanubian Unit, and evolution of the associated Variscan granite magmatism. Second part of the thesis deals with the granite petrogenesis, and characterization of granite plutons of the Moldanubian batholith, including the northernmost exposure, the Melechov massif. The third part presents results of my own research, which comprises petrography of studied thin-sections and chemical analysis of whole rock and minerals, in particular the micas and feldspars in the Lipnice granite of the Melechov massif. The research is based on analysis of four thin-sections of the Lipnice granite using optical polarization and electron microscope as well as the microprobe. Observing of the chemistry of biotite in xenoliths and in granite and their correlation shows, that biotite in the Lipnice granite is rather homogeneous...
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Participants in local development (Kácov, Chlum, Tichonice, Kladruby)
Jirků, Markéta ; Kocmánková Menšíková, Lucie (advisor) ; Pavel, Pavel (referee)
The main aim of this thesis is to compare and evaluate the importance of social activities, whether and how it contributes to quality and to the development of local life and local communities in the surveyed municipalities Chlum, Tichonice and Kladruby (municipalities under three hundred inhabitants) and compare the social activity of these municipalities with the thee times bigger township Kácov. The aim of this thesis is to find out the reason why smaller municipalities under three hundred inhabitants appear to be
as active as the larger township. The theoretical part defines the terminology related to the topic. The empirical part of the work consists of secondary and comparative data analysis of actors, activities, and community amenities. Secondary and comparative data analysis showed that social life in small municipalities is varied and rich especially
in entertainment, cultural and sport activities. Compared to the bigger township there is less folklore and education activities in smaller municipalities. It was found that the most active municipality is Kladruby with the activity ratio to population of 5,3%, followed by Tichonice with 3,6%, township Kácov with 3,3% and Chlum with 3%. It came out that there is not a direct correlation between the number of actors and social activity of the municipality. The activity of individual actors is different. It means that it is not the truth, that the more groups of actors are in the municipality, the more activities are held by the actors in the municipality. It was found that township Kácov disposes with the most diverse community amenities. Despite of a noticeable impact of community amenities on regularity of organizing activities, this factor is not the only condition for organizing activities. Deficiencies in community amenities can be partially replaced by well-functioning common organizing activities by actors, what is the factor what differentiate smaller municipalities from the large township. Exogenous approach was, over the last ten years, evident in all of the examined municipalities. There was obtained and invested financial resources to the municipalities community amenities, which allowed organizing new activities or continuing with organizing of existing activities. The empirical survey was carried out through semi-structured interviews with the actors operating in the public and nonprofit sector in the examined municipalities. A key factor in the activity organizing is community involvement connected with the mutual cooperation of individual actors (i.e. a combination of utilization of actor´s cultural and social capital). Smaller municipalities may not seem, to the interviewees actors, as active as three times bigger township. Reasons why smaller municipalities may seem as active as the larger township are more significant community involvement and a higher rate
of cooperation between actors in organizing activities in smaller communities. The social life plays an important role in all of the examined communities - especially in creating
and maintaining interpersonal relationships, in strengthening social cohesion, preserving the traditions and creating the relationship with the place. It was found and confirmed how important endogenous approach (active actor) in development of examined communities is. With the proper supplementation and harmonization with exogenous approach
can be the endogenous approach further stimulated.
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