Paper-II
Section A

1.In about 150 words each, write on any four of the following: (l0 × 4 40)

a.Use of projection diagrams to represent crystal symmetry.

b.Twinning in minerals.

c.Magmatic differentiation.

d.Heavy minerals and their significance.

e.ACF and AKF diagrams.

2.Define Inosilicates. Giving their general characters, describe the minerals of pyroxene group

3.Answer the following questions

a.Describe the crystallization of two-component system of Anorthite-Albite with solid solutions

b.What is understood by metamorphism in geology? List different types of metamorphism. Discuss any one type with suitable examples

4.Enumerate and explain the formation of different types of sedimentary structures. Write an account on their significance

Section B

5.Attempt any four answering in about 150 words each: (10 × 4 40)

a.Pneumatolysis in ore geology.

b.Environmental impact of use of fertilizers.

c.Environmental impact assessment in mining.

d.Graphical methods of estimation of ore reserves.

e.Thermodynamic principles.

6.Answer the following questions

a.Give an account of the nature and occurrence of Pb-Zn deposits of either of the following in Rajasthan:

Zavar mines

Rampura-Agucha.

b.Explain secondary (supergene) enrichment. Describe the physical and chemical factors that control above process

7.Enlist various methods of prospecting of ore. Discuss in detail the sub-surface methods of exploration for copper and groundwater bodies

8.Answer the following questions

a.What are Meteorites? Give their classification. Explain in detail their characters

b.Describe the environmental impact due to an open-cast mine in the coalfields of India. What remedial measures are being adopted there