Triangular Plots in Metamorphic Petrology

Stephen Nelson, Department of Geology

These lecture notes discuss the use of three component systems in metamorphic petrology. Common triangular plots used in metamorphic rocks are presented with annotated ternary diagrams. The presentation includes four criteria for reducing the number of components in a system to a workable number. There is also discussion of the issue of lost information when reducing the number of components in a system. This resource is part of the Teaching Petrology collection.

Part of the Cutting Edge collection. The NAGT/DLESE On the Cutting Edge project helps geoscience faculty stay up-to-date with both geoscience research and teaching methods.

Cutting Edge
This resource is referenced here:
Subject: Geoscience:Geology:Geochemistry, Igneous and Metamorphic Petrology:Thermodynamics and Phase Equilibria, Metamorphic Rocks, Geoscience:Geology:Geochemistry:Phase Equilibria/Thermodynamics, Geoscience:Geology:Mineralogy:Phase Equilibria/Thermodynamics
Resource Type: Course Information:Course Site:Course Notes, Audio/Visual:Images/Illustrations
Grade Level: College Upper (15-16), College Lower (13-14)
Classes of Earth Materials: Metamorphic Rocks
Course Type: Upper Level:Mineralogy, Petrology
Topics: Solid Earth, Chemistry/Physics/Mathematics, Solid Earth:Geochemistry, Petrology:Thermodynamics and Phase Equilibria, Metamorphic Rocks, Solid Earth:Mineralogy:Phase Equilibria/Thermodynamics, Solid Earth:Geochemistry:Phase Equilibria/Thermodynamics