Browsing 11. Symposium "Tektonik, Struktur- und Kristallingeologie" , 2006-03 by Title
Now showing items 32-51 of 111
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Feldspar deformation in greenschist facies shear zones (Aar-Massif, Switzerland)
Hauten, Sarah;
; Dobmeier, Christoph (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Granitic gneisses of the Central Aar Granite host a shear zone network that formed at greenschist facies conditions. The work area is located in the Bächlital (Grimsel area, Central Switzerland) and was chosen for the analysis ... -
Felsmechanische Untersuchungen am Hauptrogenstein (bjHR) der Vorbergzone des südlichen Oberrheingrabens
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Der Hauptrogenstein ist im Ober- Bajocium, im Braunen Jura(bjHR), gebildet worden. Im Bereich des südlichen Oberrheingrabens ist der Hauptrogenstein als hellgrauer bis hellbräunlicher, schräggeschichteter bis massiger Kalkoolith ... -
Fluidtransport entlang von Störungen und Klüften im Gebiet des Hengill-Vulkans, SW-Island
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Das Holozäne Hengill-Vulkansystem liegt in der aktiven Westvulkanischen Zone in Südwestisland. Es beinhaltet den Hengill-Zentralvulkan, der sich südlich des Sees Thingvallavatn befindet, und ist eines der aktivsten ... -
Fossil overpressures compartments? A case study from the Eifel area and some general aspects
Hilgers, Christoph; Bücker, Carsten; (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Fluid overpressures are well known from hydrocarbon exploration in many sedimentary basins. They can reach almost lithostatic values, and may cause the fracturing of rock. Fracturing allows the discharge of fluid overpressure, ... -
Fracture sealing in limestones, a microstructural and mineralogical study
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Fractures significantly enhance the flow rate in rocks, if fracture density is high (Taylor 1999, Cox et al. 2001). This leads to rapid flux along a hydraulic gradient from high to low pressure reservoirs, and is represented ... -
Fracturing and vein formation in the middle crust - a record of co-seismic loading and post-seismic stress relaxation
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Metamorphic rocks approaching the crustal scale brittle-ductile transition (BDT) during exhumation are expected to become increasingly affected by short term stress fluctuations related to seismic activity in the overlying ... -
Gefügecharakterisierung von Calcitmyloniten und Marmoren bezüglich senkrecht zueinander stehender Faltenteilstrukturen, Alpi Apuane, Italien
Pfaar, Rüdiger;; Molli, Giancarlo; (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Im nördlichen Teil des Appenin in Italien ist der metamorphe Komplex der Alpi Apuane in Form eines tektonischen Fensters sehr gut aufgeschlosssen. Die metamorphen Gesteine der Alpi Apuane — Metakarbonate, Kiesel- ... -
Gekoppeltes Kornwachstum in polymineralischen Gesteinen
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Bei Temperaturerhöhung tritt in einem kristallinen Festkörper Kornwachstum auf; die treibende Kraft hierfür entspricht einer Reduktion der Oberflächenenergie. Die Parameter, die das Kornwachstum in monomineralischen Stoffen, ... -
Geochemische Klassifikation und Sm-Nd Isotopensystematik proterozoischer Metasedimente des Baltischen Schildes (Västervik Region, SESchweden)
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Die Västervik Region liegt an einer Haupt-Terran-Grenze im Baltischen Schild. Im NE schließen sich die Einheiten des Südsvecofennischen Vulkanitgürtels mit Altern >1,85Ga an, im SW folgen die Granitoide des Transskandina ... -
Geotechnical characterization of trench- and slope sediments off Southern Chile: preliminary results
Roeser, Georg;; Kopf, Achim (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
To understand seismogenesis in shallow parts of subduction zones, it is vital to know about strength and frictional parameters of subducted sediment. For this purpose, PETROTEC, as part of the TIPTEQ-Project, gathers geotechnical ... -
Geowissenschaftliche Bedeutung von Mikrorissen in Kristallingesteinen
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)In Kristallingesteinen (Magmatite, Metamorphite, Migmatite) sind Mikrorisse allgegenwärtig. Ihre Entstehung ist auf unterschiedliche treibende Kräfte (i.W. Tektonik, Thermik) und Mechanismen wie z.B. volumetrische Verformung ... -
GPS-gestützte Kartierung gravitativer Massenverlagerungen an der Röt/ Muschelkalk-Grenze im Göttinger Wald
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Gravitative Massenverlagerungen entlang der Muschelkalkschichtstufe gehören zur natürlichen Morphodynamik. Durch die unterschiedliche Erosionsresistenz der relativ inkompetenten Ton- und Mergelsteine des Röt und der direkt ... -
Grain coarsening and hydrothermal alteration in metacarbonates of the Damara Orogen, Namibia
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Grain coarsening is a process that occurs in a wide variety of rock types. The application of grain growth theory to natural geologic materials has its beginnings in the theoretical foundations of the metallurgical ... -
Gypsum veins as hydrofractures in layered and faulted mudstones: implications for reservoir permeability
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Mineral veins form when water solutions passing through fluid-transporting fractures gradually seal the fractures as minerals precipitate. Many mineral veins are hydrofractures, that is, fractures generated at least partly ... -
Holocene shield volcanoes in Iceland
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Holocene shield volcanoes (lava shields) are common in Iceland, but they are restricted in space and time. As regards space, most of the shield volcanoes in Iceland occur within two bands in the West and North Volcanic ... -
How stress transfer between volcanic and seismic zones affects volcanic and earthquake
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Oceanic transform faults and ridge segments form a network where mechanical interaction is to be expected. In particular, dike emplacement in ridge segments is likely to affect earthquake activity in the adjacent transform ... -
Identification of uppercrustal discontinuities using dip curvature analysis of isostatic residual gravity: examples from the central Andes
; Götze, Hans-Joachim; ; ; Hongn, Fernado; Petrinovic, Ivan (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Structural analysts are often faced with the problem of identifying prominent structural discontinuities covered by post-tectonic sedimentary or volcanic rocks. Gravity fields are often used to delineate the trace of buried ... -
Influence of viscosity on growth of high pressure phases in computer experiments
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)The general aim of the project is the examination of microstructures that develop under HP conditions in computer experiments. Starting point is an interest in the dynamics of HP phase transitions, as for instance the ... -
Kinematic 3D Retro-Deformation of Fault Blocks Picked from 3D Seismics
; Lohr, Tina; ; ; Endres, Heike; Samiee, Ramin; Trappe, Henning; (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Movement on fault planes causes a large amount of smaller-scale deformation, ductile or brittle, in the area surrounding the fault. Much of this deformation is below the resolution of reflection seismics (i.e. sub-seismic, ... -
Kinematics and deformation structures in a crustal-scale shear zone on Kea (W. Cyclades, Greece)
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)It is generally agreed upon that the exhumation of metamorphic rocks in the Aegean is caused by post orogenic extension in the late Oligocene to early Miocene. This extension is in principle largely accommodated by ...
