Petrogenesis of low Ti and high Ti magmatic rocks of the Jurassic ferrar large igneous province, Antarctica [Elektronische Ressource] / von Ricarda Hanemann

Petrogenesis of low-Ti and high-Ti magmatic rocks of the Jurassic Ferrar Large Igneous Province, AntarcticaDissertationzur Erlangung des akademischen Grades doctor rerum naturalium(Dr. rer. nat.)vorgelegt dem Rat der Chemisch-Geowissenschaftlichen Fakultät derFriedrich-Schiller-Universität Jenavon Dipl.-Geol. Ricarda Hanemanngeboren am 25.08.1975 in JenaGutachter:1. Prof. Dr. L. Viereck-Götte2. Prof. Dr. F. HoltzTag der öffentlichen Verteidigung: 28.11.2007ABSTRACTThe Mid-Jurassic Ferrar Large Igneous Province is one of the Mesozoic continental plateau basalt provinces associated with the break-up of the Gondwana supercontinent. The Ferrar magmatic rocks, exposed in a linear belt along the Palaeo-Pacific margin of Gondwana, comprise numerous sills, dikes and lava flow sequences as well as the Dufek layered mafic intrusion. Uniform crust-like trace element and isotope signatures indicate a single magma source for the > 3000-km long Ferrar magmatic province. A subcontinental lithospheric mantle source has been proposed characterised by crustal enrichment due to Palaeozoic subduction along the cratonic margin of Gondwana. However, the thermal source for the voluminous melt generation is still under debate as the crust-like isotope data obscure the detection of a possible mantle plume involvement.