UPSC CGGE 2016 Question Paper Geology Paper III

sltKo. A-GSE-P-HMC
0000G83
GEOLOGY
Paper III

Time Allowed : Three Hours Maximum Marks : 200

INSTRUCTIONS
Please read each o f the follow ing instructions carefully
before attempting questions.
There are ELEVEN questions divided under
SIX sections.
Candidate has to attempt SIX questions in all.
The ONLY question in Section A is compulsory.
Out o f the remaining TEN questions, the candidate has
to attempt FIVE, choosing ONE from each o f the other
Sections B, C, D, E and F.
The number o f marks carried by a question/part is
indicated against it.
Symbols, abbreviations and notations have their usual
standard meanings.
All parts and sub-parts o f a question are to be
attempted together in the answer book.
Attempts o f questions shall be counted in sequential
order. Unless struck off, attempt o f a question shall be
counted even i f attempted partly.
Answers must be written in ENGLISH only.
Neat sketches are to be drawn to illustrate answers,
wherever required.
Wherever required, graphs/tables are to be drawn on
the answer-book itself
Any page or portion o f the page left blank in the
answer-book must be clearly struck o ff

Section - A

1. Write short answer for each o f the following with
sketches wherever necessary. 5x10=50

(a) Favourable conditions for the formation of
blanket type bauxite deposits.

(b) Grade o f iron ore from Singhbhum area.

(c) Association of REEs and Rare metals in
carbonatite.

(d) Time-distance relation for horizontal layers in
seismic refraction survey.

(e) Methods o f sampling o f porphyry copper
deposit.

(f) Biogeochemical and geobotanical surveys.

(g) Broad stratigraphic succession o f Jharia coal
field.

(h) Geology and hydrocarbon reservoirs of
Bombay High oil field.

(i) Investigation of foundation rocks in a dam site
using electrical resistivity method.

(j) Overbreak in tunnelling in relation to different
rock types.

A-GSE-P-HMC 2 (Contd.)

Section - B

2. (a) Compare the geological set up o f Khetri and
Malanjkhand copper deposits. 15

(b) With appropriate examples, write the genesis
o f gold deposit associated with the greenstone
belts in Dharwar craton of South India. 15

3. (a) What are the major economically useful rocks
belonging to ‘Vindhyan Supergroup’ ? 10

(b) What are prospecting licence and mining
leases for mineral investigation and
exploitation ? 10

(c) Explain the legal aspects o f seabed mining
with special reference to India. 10

Section - C

4. (a) How stratiform and podiform chromite
deposits differ in geological age, lithological
association, structure and tectonics? 15

(b) Describe with diagram the details o f profiling
and sounding methods o f resistivity survey.
Add a note on their applications. 12+3=15

A-GSE-P-HMC 3 (Contd.)

5 . (a) What do you mean by reduction of gravi
data ? Describe the correction to be applied to
the gravity data. 2+8=10

(b) How ‘VM SD’ and ‘SEDEX’ type deposits
differ from each other ? 10
(c) How is fluid inclusion study helpful in
geothermometry? 10

Section - D

6. (a) Describe the different stages in mineral
exploration. 15
(b) Describe the estimation of ore reserves in
blanket type bauxite deposit using surface
trenching and pitting. 15

7 . (a) Write on the procedure of core logging in a
drilling site. 10
(b) Calculate ore reserve of a 5 m thick ore
blocked out between two levels, separated by
30 m, and ready for immediate extraction. The
length of the ore block is 40 m and the bulk
density o f the ore is 2-73 gm/cc. Assuming
0-63% average grade o f copper, how much
copper metal can be obtained from the block
with 90% recovery ? 5+5
(c) How geochemical soil survey is earned out ?
10

A-GSE-P-HMC 4 (Contd.)

Section - E

8 . (a) Describe the processes of migration and
accumulation o f hydrocarbon. 15

(b) Describe the major Tertiary coal deposits of
India. 15

9 . (a) Write on the occurrence and distribution of
major radioactive mineral deposits (U - Th) of
India. • 10

(b) Describe the proximate analysis of coal and its
industrial application. 10

(c) Give an account of the geology and
hydrocarbon occurrence in any one o f the
major producing oil fields of upper Assam
shelf. 10

Section - F

10. (a) Give an account o f the field procedures for the
estimation o f compressive and shear strengths
o f rocks used for stable foundation. 15

(b) What is grouting ? Describe the typical
grouting applications in tunnelling. 15

A-GSE-P-HMC 5 (Contd.)

11. (a) Discuss the seismic vulnerability of the I n d ia ^
sub-continent and propose the features o f an
earthquake resistant dam in a high risk seismic
zone. 10

(b) Explain the various factors that influence the
life o f a reservoir. 10

(c) Describe the different types o f tunnel supports
and their usefulness in different rock types
while tunnelling. 10

A-GSE-P-HMC 6