Auflistung nach Mitwirkenden "Gudmundsson, Agust"
Anzeige der Dokumente 101-113 von 113
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Textures in mylonitised granite from Banefo area in the central part of the Cameroon Central Shear Zone (central Africa) — Kinematics and gradian deformation indicators
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)The North Equatorial Panafrican belt is constituted by orthogneissified metamorphic and magmatic sets linked to tectonometamorphic events of the neoproterozoic orogeny. This belt whose formations are situated in the North ... -
The effect of water, temperature and strain rate on the dislocation creep microstructure, recystallized grain size and flow stress of quartz
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Since the work of Griggs & Blacic (1965) it is well known that the crystal plastic flow strength of ‘wet’ quartz samples is much lower than that of ‘dry’ samples deformed at the same conditions, and the general effect of ... -
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 ... -
The importance of lithological heterogeneity of the Onaping Formation for understanding post-impact deformation of the Sudbury Impact Structure, Canada
Wittek, Andreas;; Hecht, Lutz (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
The suevitic Onaping Formation overlies the layered Main Mass of the 1.85Ga Sudbury Igneous Complex (SIC) of the Sudbury Impact Structure, Ontario. The Formation consists of four Members, namely from top to bottom, the ... -
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 ... -
The role of the Ranotsara Zone in southern Madagascar for Gondwana correlations
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)The Precambrian basement of southern Madagascar was reworked at high-grade metamorphic conditions during the East African Orogen (EAO of Stern, 1994) that formed during assembly of Gondwana in late Neoproterozoic/early ... -
The Serifos Metamorphic Core Complex (Greece) — kinematic investigations of the southern detachment mylonites
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006)The island of Serifos is situated about 100km SSE of Athens in the Aegean Sea and belongs to the Attic-Cycladic massif. The geology of Serifos is largely characterized by a shallow hornblendebiotite granodiorite pluton ... -
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 ... -
The timing of polyphase Miocene tectonics in Northern Romania
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)This study addresses the polyphase Miocene tectonic evolution in the Maramures area (northern Romania) by combining field observations, stratigraphic arguments and fission-track analysis (Tischler et al. in press). ... -
Two-dimensional finite element models of convective heat transfer in the upper crust — implications for the interpretation of fission-track data
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Fission-track (FT) thermochronology is a tool routinely used for studies of surface denudation because of its sensitivity to the low temperatures found in the uppermost part of the crust. FT ages and associated track length ... -
(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 ... -
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 ... -
Very high anisotropies of the magnetic susceptibility in ductile shear zones: first quantitative results from a metamorphic nappe in the Central Scandinavian Caledonides, Sweden
(11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)Shear zones in the Seve crystalline basement nappes of the central Scandinavian Caledonides contributed to exhumation and translation of these highgrade metamorphic rocks. The Seve unit is considered to represent the ...
