Quantification tools in structural geology, based in field examples from Namibia [Elektronische Ressource] / Sara Simões dos Santos Coelho

Quantification tools in Structural Geology, based in field examples from Namibia. Dissertation zur Erlangung des Grades “Doktor der Naturwissenschaften” am Fachbereich Chemie, Pharmazie und Geowissenschaften der Johannes Gutenberg-Universität Mainz Sara Simões dos Santos Coelho geboren in Lissabon Mainz, Mai 2007 Erklärung Ich versichere hiermit, die vorliegende Arbeit selbständig und nur unter Verwendung der angegebenen Quellen und Hilfsmittel verfasst zu haben. Mainz, Mai 2007 Abstract Chapter I presents a system for description of flanking structures, based on geometric parameters and independent of kinematic frame. The description can be made using two levels of accuracy. A qualitative method is described using four geometric features: tilt, slip, lift and roll. The method is suggested for practical use in the field, since it does not involve measurements or complicated procedures. In parallel, a quantitative approach is also presented, based on analytical modelling of Bézier curves. The method requires measurement of geometric features and involves mathematical treatment, but allows comparison between different flanking structures. Chapter II studies two types of asymmetric quartz veins occurring in wall rocks of a crustal scale sinistral ductile shear zone in Namibia, the Purros Mylonite Zone.