Note: This course is common to B.Sc. Geology (Model I) and
B.Sc. Geology and Water Management (UGC-Vocational Model III)
MAHATMA GANDHI UNIVERSITY
FIFTH SEMESTER B.Sc. DEGREE EXAMINATION 2015 (CBCSS Mark Scheme)
B.Sc. Geology (Model I)
B.Sc. Geology and Water Management (UGC-Vocational Model III)
METAMORPHIC PETROLOGY AND GEOCHEMISTRY
MODEL QUESTION PAPER
Time : Three Hours
Maximum Marks : 80
Draw neat sketches wherever necessary
I. Name the following (Answer all questions)
1. Pressure exerted by the stratigraphic column
2. Metamorphic rocks characteristic of fault zones
3. Second most abundant element in the Earth’s crust
4. Phenomenon of miscibility in solid state
5. Baric type of metamorphism characterized by the prograde sequence of chlorite- biotitecordierite-andalusite
6. Negative logarithm of H+ ion concentration in a solution
7. Common term for Iron loving elements
8. Term denoting typical mineral in a metamorphic zone
9. Metamorphism in which directed pressure is the important agent
10. Rock resulting from thermal metamorphism of limestone
(1x10=10 marks)
II. Short answer questions. (Answer any eight, in not more than 100 words each)
11. Metamorphic differentiation
12. Differentiate between diagenesis and metamorphism
13. Distinguish between slaty cleavage and fracture cleavage in metamorphic rocks
14. Define cataclastic metamorphism
15. Exsolution in metamorphic minerals
16. Isograds in a metamorphic terrain
17. Define Geothermobarometry
18. Hornfels
19. Polymorphism in rock forming minerals
20. Burial metamorphism
21. Define redox potential
22. Define Gibb’s Phase rule and its parameters
(2x8=16 marks)
III Write short essays on: (Answer any six, in not more than 300 words each)
23. Petrogenesis of composite gneiss characterized by Ptygmatic folding
24. Metamorphism in orogenic belts; give examples of resulting rocks.
25. Relict textures in metamorphosed igneous and sedimentary rocks
26. Regional metamorphism of pelitic rocks Scottish Highlands
27. Zones in Grubenmann’s depth zone concept
28. Distinguishing features of schist and gneiss
29. Features of high grade metamorphic rocks
30. Arrangement of naturally occurring elements in the modern periodic table
31. Bonding between atoms in metallic and non-metallic minerals
(4x6=24 marks)
IV Long essay questions (Answer any two, in not more than 1000 words each)
32. Describe the role of various factors in metamorphic alteration of rocks
33. Discuss textures and structures shown by metamorphic rocks of Kerala
34. Give an account of chemical composition of crust, mantle and core of the Earth
35. Describe geochemical classification of elements with examples
(2x15=30 marks)
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