The influence of petrogenetic processes on the composition of ocean island basalts [Elektronische Ressource] : studies of lavas from Hawaii and Tubuai Islands / Marie Jamais

The influence of petrogenetic processes on the composition of Ocean Island Basalts: Studies of lavas from Hawaii and Tubuai Islands Dissertation Zur Erlangung des Grades “Doktor des Naturwissenschaften” Am Fachbereich Chemie, Pharmazie und Geowissenschaften der Johannes Gutenberg-Universität Mainz Marie Jamais Geb. am 06.12.1976 in Nancy, Frankreich Mainz, 2006 All views and results in this thesis are those of the authors, unless stated otherwise. Ich versichere hiermit, die vorliegende Arbeit selbständig verfasst zu haben und alle benutzen Hilfsmittel und Quellen in der Arbeit angegeben zu haben. à mon père, et à son éternelle soif de connaissance Abstract Ocean Island Basalts (OIB) provide important information on the chemical and physical characteristics of their mantle sources. However, the geochemical composition of a generated magma is significantly affected by partial melting and/or subsequent fractional crystallization processes. In addition, the isotopic composition of an ascending magma may be modified during transport through the oceanic crust.