|
|
Deformation and petrological record of polyphase quartzo-feldspathic rocks in Erzgebirge, Bohemian Massif
Kryl, Jakub ; Lexa, Ondrej (advisor) ; Závada, Prokop (referee) ; Hasalová, Pavlína (referee)
The Erzgebirge dome, exposing Proterozoic - Early Palaeozoic metagranitoids and metasedimentary rocks of the Saxothuringian domain in the Bohemian Massif, is formed by a tectonic stack of several UHP-HP and HT units exhumed during the Variscan continental subduction-collision process. A systematic study of orthogneiss deformation microstructures carried out on a regional scale has been done to evaluate these units' extent and relative structural position in the subduction complex. Five different microstructural types have been distinguished, revealing two overprinting sequences with 1) coarse-grained microstructures in the parautochthonous Kateřina-Reitzenhain Dome and 2) fine- grained microstructures in the allochthonous HP-HT Gneiss Eclogite Unit I. P-T conditions of the individual overprinting microstructures calculated by conventional thermobarometry suggest continuous deformation during exhumation along two contrasting P-T paths. The warmer one in the parautochthonous unit showed exhumation from ~13.5 kbar and ~820 ◦C to ~3 kbar and ~500 ◦C, while the colder one in the allochthonous unit showed exhumation from ~16 kbar and ~740 ◦C to ~3 kbar and ~400 ◦C. The overprinting microstructures are associated with vertical shortening interpreted as ductile thinning. This deformation started at depths...
|
|
|
The mining heritage of the Jáchymov region as a dynamic sociocultural process
Jelen, Jakub ; Chromý, Pavel (advisor) ; Šantrůčková, Markéta (referee) ; Chrastina, Peter (referee)
The presented dissertation deals with the perception and methods of management of the mining heritage from the perspective of individual stakeholders, entities and interest groups involved in the process of its creation, inventory, interpretation, use, protection or reconstruction. At the same time, it discusses the ways of using the mining heritage, the benefits and risks of its presence in the territory or its connection to territorial identities. The general starting points of the research are based on a search and critical discussion of scientific literature and key geographical concepts (heritage, place, identity). In the first part, the thesis deals with the conceptualization of heritage in general, discussing various ways of defining and looking at heritage, its characteristics and properties, and also it discusses possible approaches to it. The thesis also brings different perspectives on classification of heritage and analysis of its individual phases, as the heritage is seen as a socio-cultural process conditioned by individual actors, entities and interest groups who enter and influence it at various stages. The thesis also deals with the ways heritage shapes and affects the environment in which it is located, including its inhabitants and visitors. After a general discussion, the thesis...
|
|
|
Extreme precipitation in low mountain ranges in Central Europe: a comparative study between the Vosges and the Ore mountains
Minářová, Jana ; Müller, Miloslav (advisor) ; Žák, Michal (referee) ; Caumont, Olivier (referee)
of the doctoral dissertation Extreme precipitation is related to flooding which is one of the most frequent natural hazards in Central Europe. Detailed understanding of extreme precipitation is the precondition for an efficient risk management and more precise projections of precipitation, which include uncertainties, especially at regional scale. The thesis focuses on extreme precipitation in the Ore Mountains (OM) and the Vosges Mountains (VG); two low mountain ranges in Central Europe experiencing orographic effect on precipitation. Based on state of the art about precipitation in OM and VG, a currently missing analysis of the temporal distribution of precipitation in VG was needed prior to the analysis of extremes. The original dataset of daily precipitation totals from 14 weather stations used in the initial study was extended to 168 stations covering a broader area of VG. The study of temporal distribution of precipitation during 1960-2013 led to a classification of stations: (i) mountainous stations with winter maxima and highest mean annual totals due to orographic enhancement of precipitation, (ii) stations on leeward slopes with two maxima (summer and winter), (iii) lee side stations with summer maxima and lowest mean annual totals due to rain shadow and more continental character, and...
|
guest ::
