M.Sc. (Semester III) (CBCS) (CGPA) Examination Mar/Apr-2018
Applied Geology
MINERAL EXPLORATION
Time: 2½ Hours
Max. Marks: 70
Instructions: Answers any five questions. All questions carry equal marks. Question 1 is compulsory. Answer any two questions from Q.2, 3 4. Answer any two questions from Q.5, 6 7. Draw neat and labeled diagrams wherever necessary.
Q.1
Choose the correct answer:
14
Molybdenum is an excellent path finder for
Bedded Chromite
Porphyry Cu deposits
Gold
None
"Threshold" the limit of a normal background fluctuation is associated with
Geochemical prospecting
Geophysical prospecting
Geo botanical prospecting
All of the above
For sulphide deposits, the most suitable method of prospecting is
Self potential method
Gravity methods

Seismic method
Magnetic methods
The surface signature of supergene sulphide enrichment is
Lignite
Gossan
Wall rock alteration
All of the above
Ground water prospecting is successfully carried out by
Geophysical survey
Hydro geological surveys
Geo botanical survey
All the above
Geiger counter is an instrument used in radioactive mineral prospecting which detects
Alpha particles
Beta particles
Gamma particles
Infrared rays
Hydro carbon bearing structures can be identified by geophysical survey.
Electrical
Seismic
Magnetic
Gravity
When you notice "As" anomaly in wall rock geochemistry, it is a pathfinder for deposits.
Porphyry copper
Uranium
S
Vein type Au ore
All of the above
The Indian Gold deposits exhibit control.
Litho logical
Stratigraphic
Structural
All of the above
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SLR-UB-43
10) The most successful geo botanical indicator for copper is
Becium homblei
Astragalus
Rubiaceae
None of the above
11) Interpretation of Electrical Resistivity data in Schlumberger configuration is carried out by
Apparent resistivity plotting
Curve matching
Potential difference
None of the above
12) If the subsurface formations are composed of three layers with resistivities P1 P2 P3 and thickness h1, h2 and infinity is exhibited by H type curve the relationship is as
P1 P2 P3
P1 P2 P3
P1 P2 P3
P1 P2 P3
13) Radioactive method is useful in the identification of
Sulphides
Carnotite
Corundum
Graphite
14) Khondalite occurring in the eastern ghats are associated with
Gold
Diamonds
Zinc
Graphite
Q.2
What are magnetic elements, state the correction required for the magnetic surveys.
14
Q.3
Write in detail on various geochemical surveys. Add a note on their merits and demerits.
14
Q.4
Write various geological criteria of prospecting ore deposits with suitable Indian examples.
14
Q.5
Write short notes on the following.
14
Mineral deposits associated with pegmatites.
Association of elements and pathfinders.
Q.6
Discuss briefly on the following.
14
Seismic reflection method.
Electrode configuration of resistivity survey.
Q.7
Describe the following.
14
Sampling methods.
Bio geochemical survey.