Petrologie der Magmatischen Gesteine

Igneous petrology is concerned with the identification, classification, origin and evolution, of igneous rocks. By far the largest part of the Earth is inaccessible. Even the deepest research borehole into the continental crust reaches a depth of not more than 12.3 km. Besides using geophysical methods, the only way to understand the composition and evolution of the Earth and the physico-chemical processes that occur in its interior, is by studying the rocks that originated in the Earth’s deep interior. Such rocks can reach the Earth’s surface as a consequence of tectonic- and/or of magmatic processes such as volcanism. The processes that are involved in magma formation and in the crystallization of igneous rocks are investigated to constrain the composition and evolution of the continental crust and the upper mantle of the Earth.Major research interests of our group are in the study of primitive magma generation at depth, the origin of continental flood basalts (CFB), ocean island basalts (OIB), mantle xenoliths, orogenic peridotite, and ophiolites that are fragments of an ancient oceanic crust. Therefrom details of the evolution of the oceanic crust are derived. Further studies concern igneous intrusions into the continental crust, including gabbros, diorites, and a broad variety of granitoid rocks that represent the source material for continental crustal growth.