Syllabus (GEOLOGY)

Course Type: MAJ-8

Semester: 6

Course Code: BGELMAJ08C

Course Title: Metamorphic petrology

(L-P-Tu): 4-2-0

Credit: 6

Practical/Theory: Combined

Course Objective: Metamorphic petrology deals with metamorphism of crustal material as a function of pressure and temperature.

Learning Outcome: Students learn to observe the change of crustal substrate due to ever changing pressure temperature.

Theory:

Unit I: Metamorphism- Types and controls

1. Definition of metamorphism. Factors controlling metamorphism.

2. Types of metamorphism– contact, regional, burial, fault zone metamorphism, impact metamorphism.

3. Fundamentals of geochemical thermodynamics.

Unit II: Metamorphism and deformation

1. Structure and textures of metamorphic rocks

2. Relationship between metamorphism and deformation

Unit III: Metamorphic Facies, Facies series and grade of metamorphism

1. Index minerals, metamorphic zones and isograds.

2. Concept of metamorphic facies and grade

3. Mineralogical phase rule of closed and open system

4. Composition-paragenesis diagrams. ACF, AKF and AFM diagrams

5. Concept of metamorphic P-T-t path

Unit IV: Metamorphic reactions

1. Types of metamorphic reactions

2. Kinetics of metamorphic reactions

3. Progressive and retrogressive metamorphism

4. Progressive metamorphism of pelitic, basic and carbonate rocks

Unit V: Metamorphism and crustal evolution

1. Metasomatism and role of fluids in metamorphism.

2. Migmatites and its origin

3. Brief idea of anatexis and partial melting of crustal rocks

4. Geothermobarometry

Unit VI: Metamorphic rock associations and plate tectonic settings

1. Regional occurrence and tectonic significance of metamorphic rocks

2. Metamorphism along convergent plate margins, in continent-continent collisions, in rifting terrains and sea floor metamorphism.

List of Practicals

1. Textural and mineralogical study of following metamorphic rocks in thin sections under microscope: Phyllites, Schists, Gneissic rocks, Amphibolite, Charnockite, Khondalite, mafic granulite, eclogite, marble, high Mg-Al granulites.

2. Graphical plots of metamorphic mineral assemblages using chemographic diagrams; ACF, AKFM, AFM diagrams

Suggested Reference Books:

• Philpotts, A., & Ague, J. (2009). Principles of igneous and metamorphic petrology. Cambridge University Press.

• Winter, J. D. (2014). Principles of igneous and metamorphic petrology. Pearson.

• Rollinson, H. R. (2014). Using geochemical data: evaluation, presentation, interpretation. Routledge.

• Yardley, B. W. D. (1989). An introduction to metamorphic petrology. Longman Scientific and Technical, London.

• Spear F. S. 1993. Metamorphic phase equilibria and Pressure-Temperature-Time paths. Mineralogical Society of America Monograph 799.