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31	Anisotropie svrchního pláště pod Severními Apeninami z dat mezinárodního experimentu RETREAT (Itálie) / Anisotropie svrchního pláště pod Severními Apeninami z dat mezinárodního experimentu RETREAT (Itálie) Munzarová, Helena January 2011 (has links) Title: Anisotropy of the upper mantle under the Northern Apennines based on data from the international experiment RETREAT (Italy) Author: Helena Munzarová Department: Department of Geophysics Supervisor of the master thesis: RNDr. František Gallovič, Ph.D. Department of Geophysics Consultant of the master thesis: RNDr. Jaroslava Plomerová, DrSc. Institute of Geophysics, Czech Academy of Sciences Abstract: In this master thesis, we process data recorded during the passive seismic experiment RETREAT (2003-2006) in the Northern Apennines with the aim to explore the upper mantle structure in the region. Active orogeny in the Northern Apennines relates to the collision of the Tyrrhenian and Adriatic (subducting westward) plates and is accompanied by an eastward retreat of the trench. Directional dependences of P-wave travel-time deviations together with variations of the fast split polarization azimuths of teleseismic SKS waves are derived from data recorded during experiment RETREAT. Both the fossil anisotropic structure in the mantle lithosphere and the anisotropy due to the present-day flow in the sub-lithospheric mantle are sources of the observed velocity-anisotropy patterns. Thick continental Adriatic plate can be divided into at least two sub-regions with their own fossil fabrics. We have also tried to...
32	Anizotropní tomografie svrchního pláště pod Evropou / Anisotropic tomography of the European upper mantle Žlebčíková, Helena January 2019 (has links) Title: Anisotropic tomography of the European upper mantle Author: Helena Žlebčíková Department: Department of Geophysics, Faculty of Mathematics and Physics, Charles University Training institution: Institute of Geophysics of the Czech Academy of Sciences (IG CAS) Supervisor: RNDr. Jaroslava Plomerová, DrSc., IG CAS Consultants: RNDr. Vladislav Babuška, DrSc., IG CAS RNDr. Luděk Vecsey, Ph.D., IG CAS Abstract: Large-scale seismic anisotropy of the continental mantle lithosphere derived from joint inversion/interpretation of directional variations of P-wave travel-time residuals and SKS-wave splitting calls for orientation of the symmetry axes to be treated generally in 3D. Nevertheless, most of the tomography studies neglect the anisotropy of the body waves completely or they are limited to either azimuthal or radial anisotropy. Therefore, we have developed a code called AniTomo for coupled anisotropic-isotropic travel-time tomography of the upper mantle. The novel code allows inversion of relative travel-time residuals of teleseismic P waves simultaneously for 3D distribution of P-wave isotropic- velocity perturbations and anisotropy of the upper mantle. We assume weak anisotropy of hexagonal symmetry with either the 'high-velocity' a axis or the 'low-velocity' b axis. The symmetry axis is allowed to be...
33	Hafnium Isotope Geochemistry of the Gabbroic Crust Sampled Along the Mid-Atlantic Ridge: Constraints on the Nature of the Upper Mantle Thomas, Christine L. 26 September 2013 (has links) No description available. Geochemistry Geology Geological Hafnium Isotope Geochemistry Trace Element Geochemistry Zircon Mid-Atlantic Ridge Gabbroic Crust Upper Mantle Slow-Spreading Ridge
34	Electrical conductivity and hydrogen diffusion in synthetic orthopyroxene single-crystals / Elektrische Leitfähigkeit und Wasserstoffdiffusion in synthetischen Orthopyroxen Einkristallen Schlechter, Elke 17 February 2011 (has links) No description available. 550 Geowissenschaften Geosciences and Geography Orthopyroxen elektrische Leitfähigkeit Wasserstoff Diffusivität Punktdefekte Magnetotellurik Oberer Mantel orthopyroxene electrical conductivity hydrogen diffusivity point-defects magnetotellurics upper mantle 38.30 Mineralogie 35.90 Festkörperchemie VHB 850: Kettensilikate {Mineralogie}
35	Elektrische Anisotropie durch ausgerichtete Olivinkristalle im oberen Mantel in Mitteleuropa: Magnetotellurische Array-Messungen und ein Ansatz zum Vergleich mit seismischer Anisotropie / Electrical anisotropy by aligned olivine crystals in the upper mantle in Central Europe: Magnetotelluric array measurements and an attempt of a comparison with seismic anisotropy Gatzemeier, Alexander 25 January 2002 (has links) No description available. 530 Physik Mathematics and Computer Science Oberer Mantel Anisotropie Magnetotellurik Elektrische Leitfähigkeit Array Leitfähigkeitsmechanismen Upper mantle anisotropy Magnetotellurics Electrical conductivity Array Conductivity mechanisms 33.05 38.70 TOD 410: Oberer Erdmantel {Geophysik} TSB 000: Mitteleuropa {Geophysik} RDE 000: Experimentalphysik

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