M.Sc. (Applied Geology) (Semester
(CBCS) Examination, 2017
LGNEOUS AND METAMORPHIC PETROLOGY
Day Date: Thursday, 20-04-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
N.B. Attempt any five question.
Question No.I is compulsory.
Answer two questions from Q. No. 3 and 4 and
two Question from Q.No.5, 6 and 7.
All question carry equal marks..
Q.1 Fill in the blank with appropriate word: 14
Which of the following minerals might be found in a granite dike?
Amphibole Muscovite Biotite All the above
During crystallization of a melt plagioclase become richer in
Potassium Sodium Calcium Krypton
Which of the following is concordant intrusive rock?
Dyke Sill Stock Batholith
What type of igneous rock would contain 10 mm long plagioclase
crystals surrounded by 0.5 mm long crystals?
Porphyry Obsidian Phaneritic Aphanitic
Crystals of igneous rocks that can be seen with naked eyes are
known as
Phaneritic Aphanitic Porphyry Pyroclastic
The rate of cooling of a magma or lava is reflected by the of
the rock.
Z
Mineralogy Texture
Colour Density
According to Bowen's reaction series, which of the following pairs
of phases are likely to be incompatible?
Quartz and alkali feldspar
Ca- Plagioclase and Olivine
Quartz and olivine
Na-plagioclase and amphibole
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Which type of pressure will result in the alignment of metamorphic
minerals?
Contact pressure Directed pressure
Confining pressure None of the above
What type of metamorphism is caused by high temperature and
high pressure imposed over a large volume of crust.
Burial Contact Regional Cataclastic
10) Metasomatism is
The change in the bulk composition of a rock during
metamorphism.
Metamorphism caused by tectonic movements along faults.
Metamorphism caused by tectonic movements along faults.
The parallel alignment of minerals in a metamorphic rock.
11) Which of the following index minerals forms at the highest
metamorphic grade?
Sillimanite Garnet Quartz All the above
12) During metamorphonism, changes in the bulk composition of a
rock occur primarily as a result of
Increase in pressure Increases in temperature
Reaction with hydrothermal fluids All of these
13) What is the most prominent textural feature of regional
metamorphic rocks?
Foliation Bedding Cataclasis Ripples
14) Which of the following processes will cause metamorphism?
A change in the chemical environment
An increase in temperature
An increase in pressure
All of these
Q.2 Discuss in detail Petrogenetic. Chemical, Mineralogical and field
aspects Deccan flood Basalt.
14
Q.3 What is Metamorphic facies, Explain in detail Granulite facies. 14
Q.4 Explain in detail Orthoclase- Albite phase system. 14
Q.5 Explain in short: 14
Paired metamorphic belts
Decarbonation reaction
Q.6 Discuss in brief: 14
Isograde and borrowian metamorphic zones
Zeolite facies
Q.7 Describe the following: 14
Kimberlite
Cooling behavior of magma