Sgreva Rubens, Nicolò (2014) Deformazione duttile nei neks di granati budinati in facies granulitica. Ductile deformation within necks of garnet boudins formed at granulite facies conditions. [Laurea triennale]
Full text disponibile come:
In this work we have studied a sample that comes from a shear zone in Amaroni, in the Calabrian Serre Massif. In this place there is an outcropping portion of hercynian continental crust with, its deepest part, exhumed by tertiary tectonic. The sample comes from migmatitic paragneiss; the ages obtained by Zircons dating, point the registered metamorphic peak to an age of about 300 My (Schenk 1984; Micheletti et al., 2008). The metamorphic peak is related to high magmatic activity, with a high emplacement of granitoids magmas in the intermediate crust. Later, this deep portion was affected and involved in alpine and appenninic orogeny. During this phase, a lot of tectonic nappes of different geologic provenience, have been imbricated during thrusts tectonics. The principal line, as a thrust, was the Curinga-Girifalco Line (CGL) that separates the deep crust from other low-grade alpine nappes. The sample’s composition is a set, in equilibrium, of quartz, garnet, sillimanite, k-feldspar and biotite. Knowing the deformation is related to granulitic facies and that garnet deformation, in this P-T conditions, is not widespread (Papa, 2013), we wanted to verify the behavior of this mineral also on a particular microstructure like boudins’ neck. The analysis has been made with SEM, using crystallographic techniques like EBSD and Orientation Contrast. The results show how, in the high temperature condition, the ductile deformation is concentrated in the points where the strain is greater, like necks.
BibliografiaI riferimenti della bibliografia possono essere cercati con Cerca la citazione di AIRE, copiando il titolo dell'articolo (o del libro) e la rivista (se presente) nei campi appositi di "Cerca la Citazione di AIRE".
Le url contenute in alcuni riferimenti sono raggiungibili cliccando sul link alla fine della citazione (Vai!) e tramite Google (Ricerca con Google). Il risultato dipende dalla formattazione della citazione e non da noi.
Solo per lo Staff dell Archivio: Modifica questo record