%0 Generic
%A Krob, Florian
%C Heidelberg
%D 2020
%F heidok:28904
%R 10.11588/heidok.00028904
%T The Neoproterozoic to recent evolution of SW Gondwana - From an orogen to a passive continental margin environment induced by the "plate" and "plume mode".
%U https://archiv.ub.uni-heidelberg.de/volltextserver/28904/
%X The overarching goal of this thesis is the reconstruction of a coherent Late Neoproterozoic to recent time-temperature-evolution to connect individual geological stages (environments) of the Wilson Cycle, and consequently, follow the development from an active orogeny to an intraplate and later passive continental margin environment induced by the interaction of the “plate“ and “plume mode”.  The research is based on the thermochronological analysis of Neoproterozoic basement rocks along the South Atlantic passive continental margins in SE Brazil and NW Namibia as well as the numerical modeling of the collected data. Moreover, the study combines multiple geological archives, e.g. geo- and thermochronological data from the published geological record and the stratigraphic records of sedimentary basins to constrain the entire timetemperature-evolution.  In addition, the research aims to retrieve signals and traces of the Paraná-Etendeka vertical and horizontal plume movement during the Mesozoic SW Gondwana intraplate environment. It quantifies the possibly plume-induced rock and surface uplift (dynamic topography) preceding the Paraná-Etendeka Large Igneous Province integrating all available thermochronological data sets along the South Atlantic passive continental margins and the stratigraphic records of the major sedimentary basins surrounding the Paraná-Etendeka Large Igneous Province.  By combining multiple geological archives, this thesis succeeds to reconstruct a possible and coherent Late Neoproterozoic to recent time-temperature evolution. Thereby, this research quantifies the timing, magnitude und rates of cooling and heating, or rather exhumation and subsidence during the development of the individual geological environments.  The thesis therefore comprises the post-Pan African/Brasiliano orogenic cooling of rocks, the burial and subsidence involving the heating of the Neoproterozoic basement rocks during the Late Paleozoic Gondwana intraplate basin formation, and the thermal overprint caused by the Paraná-Etendeka flood basalt deposition and magmatic activity and following cooling during the post-South Atlantic rift and breakup exhumation. Furthermore, signals and traces of the Paraná-Etendeka plume movement causing large scale rock and surface uplift prior to the emplacement of the Paraná-Etendeka Large Igneous Province are retrieved. As a result, it is possible to determine spatial and temporal ranges for the plume movement-influenced area on the Earth’s surface during the Mesozoic SW Gondwana intraplate environment. Thereby, this thesis contributes to the understanding of the complex evolution of the individual yet interconnected geological environments and the dynamic interplay of the driving endo- and exogenous forces.