11. Symposium "Tektonik, Struktur- und Kristallingeologie" , 2006-03
Recent Submissions
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Structural control of fluid flow on a carbonate platform margin: an example from the Otavi Mountainland, Namibia
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)The present study focuses on the northwestern OML, southwest of the mining town of Tsumeb. The dominating structure in this area is the NW-SE striking Guinas Fault. The Guinas Fault is a shear zone that divides an area, ... -
Effect of crystallography and temperature on the development of quartz high-angle grain boundaries in metamorphic rocks
Liebl, Christoph; Kuntcheva, Boriana;
; Kunze, Karsten (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Grain boundary migration during dynamic recrystallization of quartz results in grain boundary suturing of various extent. The geometry of the sutured boundaries is affected not only by temperature, strain rate, finite ... -
Asymmetrical deformation of the Piton de la Fournaise (Réunion Island) summit cone
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Piton de la Fournaise (Réunion Island) is an active basaltic shield volcano in the south-western part of the Indian Ocean. The activity consists essentially of lava being issued from two rift zones close to the summit cone. ... -
Crystal distribution patterns and their anisotropy behaviour in igneous rocks: towards an automated quantification, first results
Peternell, Mark; (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Since approximately two decades fractal geometry offers tools for the quantification of rock fabrics, and new methods are currently under development to investigate the inhomogeneity of crystal distributions, grain- ... -
Neue Perspektiven der Texturanalytik von Gesteinen mit konventioneller Röntgenbeugung
; Ullemeyer, Klaus (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Technische Entwicklungen und verbesserte Messmethoden haben in den vergangenen 15 Jahren in der Gesteinstexturanalyse zu einer zunehmenden Nutzung vor allem der Elektronen- und Neutronenbeugung geführt. Dabei ist die ... -
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- ... -
Kinematik des Deckenkontaktes zwischen der Combinzone und der Zermatt-Saas-Zone (Penninische Decken, Westalpen) und deren Bedeutung für die Exhumierung der Zermatt-Saas-Zone
Pleuger, Jan; Roller, Sybille;; Jansen, Ekkehard; Froitzheim, Nikolaus (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Die Grenze zwischen zwei ophiolithischen Decken der penninischen Alpen, der Zermatt-Saas-Zone (unten) und der Combinzone (oben), markiert zugleich einen bedeutenden Sprung der bei der tertiären alpinen Metamorphose ... -
Change of deformation mechanisms during low temperature flow of rocks — observation from micron to nanometer scales
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Recent studies on nano-materials in materials science revealed that nanomaterials may have fantastic features due mainly to size-effect of the materials. For example, nano ceramics may have very high ductility at room ... -
The significance of fractures in Europe
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Analytical modelling of geological fractures is now at an exciting stage. In view of the ever-mounting amount of fracture data available, and the need for a European overview of the state of the art, we correlate fractures ... -
A new practical and economical technique for the obtention of high quality thin section photographs with the help of a simple optical microscope
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Microscopic study is an indispensable step in the determination of the petrographic characteristics of rocks. In Cameroon just like in most developing countries, simple polarizing microscopes of the 20th Century constitute ... -
The fate of sandstone during impact cratering: shock compaction, cataclastic flow, and granular fluidization
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Impact of solid bodies is the most fundamental of all processes that have taken place on the terrestrial planets in our Solar system (Shoemaker 1977). On Earth, impact cratering was the dominant geologic process during the ... -
Structural record of an oblique impact: the central uplift of the Upheaval Dome impact structure, Utah, USA
; ; Jahn, Andreas (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
Most asteroids strike their target at an oblique angle (Pierazzo & Melosh 2000). The common criterion for identifying craters formed by an oblique impact is the pattern of the ejecta blanket. On Earth, however, ejecta ... -
Über die mechanischen Ursachen von parallelen Abschiebungen
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Gruppen von parallel einfallenden Abschiebungen treten in der Natur sehr häufig und in unterschiedlichsten Dimensionen auf. Existierende, überwiegend experimentelle Arbeiten führen einheitliches Einfallen auf laterale ... -
Extensional crustal-scale shear zones in the Western Cyclades (Kea, Greece)
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Intense seismicity and intensely developed active and ancient fault systems are common to the Aegean Region. Extending/ thinning crust involves a complex interplay of (1) Gulf of Corinth riftexpansion, (2) west- and ... -
Strukturanalyse juveniler Fragmente in Vulkaniklastika des Messel Maar-Diatrems
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Geophysikalische Untersuchungen im Gebiet der Grube Messel (25km südlich von Frankfurt) ließen schon vor einigen Jahren eine Maar-Diatrem-Struktur im Untergrund vermuten. Jedoch erst die gekernte Forschungsbohrung im Jahr ... -
The role of penetrative deformation in orogenic processes. An example from the Eastern Cordillera of Colombia
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)The Lower Cretaceous units of the Eastern Cordillera of Colombia have been deposited during a stage when the area where nowadays lies a contractional orogen was an actively deforming rift. Therefore, they are syn-rift ... -
Paläofluide in störungskontrollierten Bruchsystemen der Aachener Geothermie-Bohrung
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)In der vorliegenden Arbeit werden geologische Prozesse im Untergrund des linksrheinischen Rhenoherzynikums und deren Verhältnis zum regionaltektonischen Rahmen anhand der Proben aus der Aachener Geothermie- Bohrung mit dem ... -
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 ... -
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 ... -
Measurement of calcite crystallographic-preferred orientations by magnetic anisotropy and comparison to diffraction methods
Schmidt, Volkmar; Hirt, Ann M.; Burlini, Luigi;; (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
The anisotropy of magnetic susceptibility (AMS) of rocks reflects the preferred orientations of minerals. Therefore AMS is a quick and easy way to characterize rock fabrics (Hrouda 1982,Borradaile 1988); the obtained result ... -
Cadomian and Variscan metamorphic events in the Léon Domain (Armorican Massif) resolved by trace element analysis in monazite and garnet
; Krenn, Erwin; Finger, Fritz; Brätz, Helene; Klemd, Reiner (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
The question, whether crustal domains are allochthonous terranes or not is crucial for plate tectonic models of the Ibero-Armorican segment of the Variscan belt. The Léon Domain in the Armorican Massif appears as a ... -
(U-Th)/He thermochronology — methodology and a case study: dating of faulting in the Southern Alps
; Dani˘sík, Martin; Picotti, Vincenzo; Frisch, Wolfgang; Eynatten, Hilmar von; Castellarin, Alberto (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
The radiogeic 4He isotope is continuously forming in the lithosphere mainly by the alpha-decay of U, Th and Sm. This decay process was discovered already at the beginning of the 20th century, and the first U/He dating ... -
Einfluss der Zusammensetzung von Titanomagnetit auf Suszeptibilität — Fallstudie an einem Dyke-Sill Komplex in Ungarn
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)In den letzten Jahrzehnten hat die Messung der magnetischen Suszeptibilität im Schwachfeld (üblicherweise bei 300Am−1) für geologische Arbeiten eine wichtige Rolle eingenommen. Da anhand der Anisotropie der magnetischen ... -
Evolution and structure of the Upper Rhine Graben — quantitative insights from numerical modelling approaches
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)The Upper Rhine Graben forms the major segment of the Cenozoic Rift system of Western Europe. Although the rift was the target of many seismic and geological investigations, the style of lithospheric extension below the ... -
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 ...
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