1
10 Marksmedium
Discuss the structures of inosilicates with neat sketches and mineralogical examples.
2
10 Marksmedium
Explain the phenomenon of twinning and discuss the twinning in feldspars with neat sketches.
3
10 Marksmedium
What is a peritectic? Discuss an appropriate reaction that represents a peritectic.
4
10 Marksmedium
Explain how granulite facies rocks can be texturally and mineralogically differentiated from amphibolite facies rocks.
5
10 Marksmedium
Ripple marks are common in sandstones and siltstones. Why are they rare in conglomerates and shales?
6
20 Marksmedium
With neat sketches describe the symmetry elements and forms of the normal class of the isometric system. Name three minerals belonging to this class.
7
20 Marksmedium
Discuss the classification and chemistry of clay minerals.
8
10 Marksmedium
While quartz is completely absent in the mantle, why is it the most common mineral on the continents?
9
20 Marksmedium
What are the different discontinuities within the earth picked up by seismic waves? What are the petrological explanations for each of these discontinuities?
10
10 Marksmedium
What do the following two series signify and what is the difference between the two?
11
10 Marksmedium
Chlorite → Biotite → Garnet → Staurolite → Kyanite → Sillimanite
12
10 Marksmedium
Shale → Slate → Phyllite → Schist → Gneiss.
13
20 Marksmedium
What is a Komatiite? What is the reason for the spinifex texture shown by Komatiites? From your answer discuss the possible reason why Komatiites are found mostly in the Archean.
14
20 Marksmedium
Explain the process of lithification and diagenesis with special reference to limestones.
15
20 Marksmedium
Discuss the evolution and characteristic features of the major sedimentary basins of India.
16
10 Marksmedium
Considering the Bowen's reaction series, discuss how an igneous rock will be affected during retrogressive transformation.
17
10 Marksmedium
Explain the difference between syngenetic and epigenetic deposits with neat sketches and suitable examples.
18
10 Marksmedium
What are the placer minerals produced from beach sands in India? Describe the properties and uses of any two of these minerals.
19
10 Marksmedium
Briefly describe the principles and applications of self-potential and induced polarization methods of electrical prospecting.
20
10 Marksmedium
What are the chemical parameters which determine the coordination number of a cation in crystal structure? Illustrate with examples of cations in 3-fold and 4-fold coordination in rock forming minerals.
21
10 Marksmedium
What are the sources of marine pollution and their effect on marine eco-system?
22
10 Marksmedium
Which one of the two minerals, magnetite and hematite, contains more iron? Illustrate by calculating iron concentration (in wt.%) of magnetite and hematite. Atomic weight of Fe = 56, O = 16.
23
15 Marksmedium
Explain the process of formation of magmatic sulphide deposit. What is the characteristic mineral assemblage of magmatic sulphide deposit?
24
10 Marksmedium
Write a note on air-borne magnetic survey and its advantage over ground based magnetic survey.
25
15 Marksmedium
What are the methods of underground mining of mineral deposits? Add a note on impact of underground mining on ground surface and environment.