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Combined Geo-Scientist (Main)
Examination, 2024 SGSE-B-GLG
GEOLOGY
Paper - 111
Time Allowed : Three Hours Maximum Marks : 200
Question Paper Specific Instructions
Please read each of the following instructions carefully before attempting
questions:
There are ELEVEN questions divided in SIX sections.
Candidate has to attempt SIX questions in all.
The ONLY question in Section A is compulsory.
Out of the remaining TEN questions, the candidate has to attempt FIVE, choosing ONE
from each of the other Sections B, C, D, E and F.
The number of marks carried by a question 1007! is indicated against it.
Unless otherwise mentioned, symbols, abbreviations and notations have their usual
standard meanings.
Neat sketches are to be drawn to illustrate answers, wherever required. They shall be
drawn in the space provided for answering the question itself.
Wherever required, graphs/tables are to be drawn on the Question-cum-Answer (QCA)
Booklet itself:
Attempts of questions shall be counted in sequential order. Unless struck off, attempt of a
question shall be counted even if attempted partly.
Any page or portion of the page left blank in the Question-cum-Answer (QCA) Booklet must
be clearly struck off.
Answers must be written in ENGLISH only.
SGSE-B-GLG 1
SECTION A
(Compulsory Section)
౧1. Describe the following in brief with neat labelled diagrams, wherever
necessary :
(a) Cherty iron formations
(0) Supergene Ores
(c) Suitable geophysical methods for disseminated sulphide deposits
(0) Building stones associated with Peninsular India
(e) Two major mineral commodities related to the cement industry and
their distribution in India
(0 Pathfinder elements associated with magmatic deposits of chromite and
Cu-Ni sulphides formed through immiscible magmatic processes.
(g) | What is a trap rock in hydrocarbon exploration ? Briefly describe the
Kerogen shale as a trap rock.
Young’s Modulus and Poisson’s Ratio بط
0) Beach budget
(j) Urban floods
SGSE-B-GLG 2
SECTION B
Attempt any one question.
७2. (a)
(b)
Q3. (a)
(b)
(c)
Discuss the different types of hydrothermal cavity filling deposits.
Illustrate your answer with suitable labelled sketches.
Describe the characteristics, geological setting and process of formation
of heavy mineral sand deposits on shorelines.
Describe the geological setting of Kupferschiefer type deposits.
Discuss the role of stable isotopes of O and H in ore genetic studies.
Describe the mineralization that occurs in continental rifts.
SGSE-B-GLG 3
15
15
10
10
10
SECTION C
Attempt any one question.
৫4.
Q5.
(a)
(b)
(a)
(b)
(૦)
What are the different stages of mineral exploration ? Discuss these
stages in terms of expenditure versus risk from planning to mining
stages.
Explain various types of errors which are induced during sampling in
mineral exploration. How can these errors be minimized ?
Describe reverse circulation drilling in detail with a schematic diagram.
Compare reverse circulation drilling with diamond core drilling. With
which of these two techniques is wireline drilling associated ? What are
the advantages of wireline drilling ?
In the following table, length of core samples, specific gravity and assay
values for a zinc mineralized deposit are provided. Consider all the cores
to be of same diameter.
Calculate average grade in volume and weight terms. Which of these is a
more reliable estimate of average grade ?
Length Specific Gravity Assay value (Zn%)
10 3:01 5.51
15 2:89 5-01
1:2 3:15 589
2:0 3:26 6:02
15 2:97 5:40
13 3:04 5:55
Name two major Al-minerals in major bauxite deposits of India. Briefly
describe the distribution of major bauxite deposits along the East coast
of India.
SGSE-B-GLG 4
15
15
10
10
10
SECTION D
Attempt any one question.
Q6. (a)
(b)
૨7. (a)
(b)
(c)
Define and describe Continental Shelf, Continental Slope, Continental
Rise and Continental Margin in relation to the Exclusive Economic Zone
(EEZ).
How are strategic, critical and essential minerals classified ? Discuss at
least three mineral resources of India which have critical applications
during war.
Discuss various modes of occurrence of phosphorite deposits. Describe
these deposits from India along with their stratigraphic context.
What are refractory minerals ? Describe their classification along with
the distribution of these deposits in India.
Describe the calculation of reserves of mineral deposits by Isochore plan,
illustrating with neat sketches.
SGSE-B-GLG 5
15
15
10
10
10
SECTION E
Attempt any one question.
౧8. (a) What is a tunnel ? Enumerate the various engineering properties of
rocks that are to be considered in tunnel excavation. How do you
circumvent a plausible collapse of a tunnel ?
(b) What is Rock Quality Designation ? Enumerate the various rock
qualification techniques adopted in the field to evaluate the soundness of
rock for its utility as construction material in civil engineering projects.
Q9. (a) What is proximate and ultimate analysis of coal ? How does this analysis
help in the evaluation of coal ?
(b) Briefly describe the salient features of lignite deposits of India. List the
various constraints associated with these deposits.
(c) Briefly describe and categorize the major petroliferous basins of India.
SGSE-B-GLG 6
15
15
10
10
10
SECTION F
Attempt any one question.
০10. (a)
(b)
౧11. (a)
(b)
(८)
SGSE-B-GLG
What is desertification ? Describe its causes and mitigation strategies.
Discuss the environmental impact of hydropower projects.
Discuss the sources of groundwater pollution and possible treatment
methods.
Describe in brief the strategies being used for preventing landslides.
Describe the environmental impact of mining.
15
10
10
10
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