Petrology Chapter 11Gautam Sen

Classification

Alkaline Magma Differentiation

Spitskop Complex, S. Africa

Twin Differentiation Trends

East African Rift Zones

Evolution of Rift System

Ethiopian Flood Basalts

Ignimbrite groups in Ethiopian Traps

REE in Rhyolitic Ignimbrites (lines) & Basaltic Ignimbrites (shaded)

Isotopic composition of Ethiopian Traps

Composition of Rift Volcanics in EARS

Potential Temps

REE in Rift Volcanics

Isotope composition of Ethiopian flood basalts and EAR Volcanics

AP = Afar PlumeKP = Kenyan Plume

Kimberlite Pipe

Ages of African Kimberlites

Pyroxene geotherm

Phase Diagram for Kimberlites & Carbonatites

Phlogopite stability

Lithosphere Structure