Magmatism and Metamorphose I

Abstract

This course treats the generation and evolution of igneous rocks as well as the metamorphism of igneous and sedimentary rocks as products of geodynamic processes operating within the Earth´s interior.

Objective

This course combines petrography, geochemistry, experimental and theoretical petrology to assess fundamental igneous and metamorphic processes controlling the generation and evolution of igneous and metamorphic rocks in time and space. Principle targets are (1) the generation of magmas in the Earth mantle and crust, differentiation and emplacement of magmas at depth and on the surface and (2) metamorphism of igneous and sedimentary rock series and their relationships in the framework of global tectonics. The material is mostly presented in qualitative way. A quantification of igneous and metamorphic processes based on modal mineralogy, geochemistry, phase petrology and thermodynamic principles is assessed and further promoted in the accompanying homework and exercises. Basic knowledge of rock-forming minerals and the classification of igneous and metamorphic rocks are required and will be further trained during the exercises.

Content

Introduction – Historic evolution – magmatism-metamorphism-tectonics Earth mantle – composition, metamorphism, deep mantle mineralogy Partial melting of the Earth´s mantle Binary and ternary subsolidus and liquidus phase diagrams Tholeiitic magmatism – MORB and large igneous provinces (LIP) Subduction zones – Magmatism at convergent plate margins, H2O-cycle Geochemistry in igneous petrology Igneous differentiation processes at convergent plate margins Metamorphism of pelitic rocks (metapelites) and crustal melting Material cycles at convergent plate margins

Resources