Zugl.: München, Univ., Diss., 2007

Zugl.: München, Univ., Diss., 2007

This thesis deals with fluid inclusion study of quartz samples from Ratibořské Hory and Stará Vožice and baryte samples from Stříbrná Skalice and Černé Voděrady. Samples were studied by methods of microthermometry of fluid inclusions, Raman spectrometry, UV-fluorescence spectrometry and EDX analysis. In quartz sample from Stará Vožice there were detected low-salinity H2O-CO2-N2 fluids that were trapped at min. 240 MPa and 260 řC. This mineralization is probably connected with initial stages of structural evolution of the Blanice Graben. Late-metamorphic fluids were probable source of these solutions. In sample of quartz containing grains of galena there were trapped mesothermal (Th = 110-195 řC) low- to medium-salinity H2O-NaCl fluids, hydrocarbon fluids and low- salinity (H2O)-CO2-N2-CH4 fluids (containing max. 13 mol. % N2+CH4 in carbonic phase) trapped at low pressure (max. 10 MPa) and relatively low temperature (105-120 řC). In Ratibořské Hory there were detected heterogeneously trapped low- to medium-salinity H2O±CO2±N2±CH4- NaCl±KCl±MgCl2±FeCl2 (with max. 26 mol. % N2+CH4 in carbonic phase) fluids trapped at 1-25 MPa and 160-315 řC. In barite sample from Černé Voděrady were detected low- to high-salinity aqueous fluids with Na and Ca ± K, Fe, Mg chlorides. These solutions are probably derived...

This dissertation contributes to the crystal chemistry of Te. The primary goals of the thesis are synthesis and crystal structure analysis of new Te-bearing ternary phases. The first part of the thesis shows significance of experimental mineralogy in research of Te containing systems. It briefly describes a novel approach to the study of new mineral species - the possibility of using synthetic analogues for their detailed mineralogical characterization. The results of the experimental mineralogical study in the Ni-Sb-Te ternary system at 400řC are reported in the second part. According to the performed experiments, two solid solutions λ1- Ni(Sb1-xTex)1+y (0<x<1, where 109.09.0 ≤≤⇒≥≈∀ yx ) and λ2 - NiSb1-xTe2x (0.28<x<0.66) dominate the system at 400řC. A characteristic feature of most phases present in the Ni-Sb-Te system at 400řC is apparent tendency to the Sb - Te substitution. The third part deals with the characterisation of the new mineral pašavaite Pd3Pb2Te2, which was found at the Noril'sk-Talnakh Ni-Cu camp, Russia. The synthetic Pd3Pb2Te2 phase was used for thorough mineralogical characterization of this new mineral species. Pašavaite displays orthorhombic symmetry, space group Pmmn. The structural identity between natural grains and synthetic Pd3Pb2Te was supported by the EBSD study. The...

In der vorliegenden Arbeit werden grundsätzliche festkörperspektroskopische und dosimetrische Erkenntnisse zur Infrarot-Lumineszenz in Kalifeldspatmineralen vorgestellt. Diese Lumineszenz kann optisch und thermisch angeregt werden, wird aber primär während der Wechselwirkung der Minerale mit ionisierender Strahlung erzeugt Infrarot-Radiofluoreszenz (IR-RF)). Dabei sind zwei Emissionen bei 865 nm bzw. 910 nm messbar. Aus Erkenntnissen über die IR-Lumineszenz an Blei-dotierten Kaliumchloridkristallen (KCl:Pb) ist bekannt, dass monovalente Pb + -Ionen beide Emissionen hervorrufen. Pb + entsteht während der Bestrahlung der Proben von KCl:Pb und Kalifeldspatproben mit ionisierender Bestrahlung durch Elektroneneinfang aus Pb 2+ . Durch die UV-Anregung der IR-Lumineszenz der Pb + -Ionen (Infrarot-Photolumineszenz (IR-PL)) kann die Gegenläufigkeit der Zu- bzw. Abnahme der Konzentrationen an Pb + -Ionen bzw. über die Messung der IR-RF der Pb 2+ -Ionen nachgewiesen werden. Dieser Prozess ist durch Bestrahlung mit Licht der Wellenlängen &amp;lt;570 nm umkehrbar, was die optische &amp;quot;Bleichbarkeit&amp;quot; der IR-RF erklärt. All diese Eigenschaften begünstigen eine Nutzung dieses Lumineszenzphänomens für die Fixierung des letzten Belichtungszeitpunktes quartärer klastischer Sedimente. Die Präzision einer solchen Datierungsmethode wird stark von der Präzision der Kalibrierung der Laborquellen zur Regenerierung der natürlich absorbierten Energiedosen bestimmt. Daher wurde als wesentlicher Bestandteil dieser Arbeit die Eignung des synthetischen Thermolumineszenz-Dosimeters Al2O3:C als Sondendosimeter gemäß der Bragg-Gray-Hohlraumtheorie bewiesen und ein entsprechendes Kalibrierungsverfahren mit sehr geringen Fehlern entwickelt. Die Resultate dieser Arbeit führten zur Entwicklung eines robusten und physikalisch begründeten geo-chronometrischen Lumineszenzdosimetrieverfahrens zur Datierung quartärer Sedimente im Altersbereich zwischen 15000 Jahren und ca. 250000 Jahren.

Universit́e, Diss., 1999--Hamburg.

Techn. University, Diss., 2005--Berlin.

The thesis contains a summary of geological aspects characteristics in South Bohemia region. There is also a description of contemporary status of some locations including picture documentation in the work. The description is compared with the data shown in the topographic literature.

No description available.

The aim of the thesis is to determine the levels of the physical and mechanical properties of chosen sedimentary (siliciclastic) rocks and also to describe their microstructural nature. With respect to the intended use of the studied material (building stone raw material) the laboratory testing methods are presented. The samples were taken from the drill cores and also from the surface blocks in locality "Zlatý lom" Březín situated in western Bohemia. The microstructural phenomena in the samples were studied using optical microscopy and digital image analyses. According to Folk's classification (1980) the name of the rock was lithic arkose. The strength testing methods were represented by unconfined compressive strength and the Brazilian test. The rest of the mechanical parameters were determined in form of Young's modulus, shear modulus and Poisson's ratio. Special emphasis was given to the hydric expansion (after full immersion) test. The other physical methods were used in order to describe the pore space and real density of samples. For this purposes the absorption test, mercury intrusion porosimetry and helium pycnometry were performed. Besides the porosity value, the pore-size distribution histograms were obtained. In order to calculate the theoretical density of the rock MINLITH and MODES...