M.Sc. (Semester II) (CBCS) Examination Nov/Dec-2018
Applied Geology
IGNEOUS AND METAMORPHIC PETROLOGY
Time: 2½ Hours Max. Marks: 70
Instructions: Answer any five questions.
All questions carry equal marks.
Question No. 1 is compulsory.
Answer any two questions from Q. No. 4 and two questions from Q.
No. 7.
Draw neat and labeled diagrams wherever necessary.
Q.1 Rewrite the sentences by choosing correct answer from given alternatives: 14
The characteristic mineral assemblage of khondalite is
Garnet-feldspar Biotite
Plagioclase-clinopyroxene Cordierite-spinel
Any reversal of metamorphism which produces rocks of a lower metamorphic
grade is
Retrograde metamorphism Progressive metamorphism
Dynamothermal metamorphism Thermal metamorphism
The distinctive rock assemblage containing ultramafic, gabbroic and basaltic
rocks often capped by layers of deep sea sediments are termed as
Calc-alkaline Hornfels
Granulites Ophiolites
Ophitic texture is commonly exhibited by
Andesite Trachyte
Dolerite Lamprophyre
Liquid immiscibility is explained as the process of formation of
Carbonatite Phonolite
Lamprophyre Kimberlite
The Norms or CIPW classification is essentially a classification.
Mineralogical Chemical
Genetic Textural
The process of production of different magma and rocks from a single parent
magma.
Partial melting Magma variation
Magma differentiation Magma mixing
Which of the following lists is arranged in order from lowest to highest grade of
metamorphic rocks?
gneiss, slate, schist, phyllite gneiss, schist, phyllite, slate
slate, gneiss, phyllite schist Slate, phyllite, schist, gneiss
IUGS has recommended a classification scheme called Total Alkaline Silica
for
Volcanic rock Plutonic rocks
Hypabyssal rocks Mafic rocks
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SLR-VB-30
10) Harzburgite is type of igneous rock.
Volcanic rock Ultramafic rocks
Ultrapotassic rock Lamprophyre
11) The repetition of metamorphic event is called as
Metasomatism Polymetamorphism
Regional metamorphism None
12) Greenschists are metamorphic rocks of igneous composition.
Acidic Basic
Intermediate Ultrabasic
13) Mylonites are product of which metamorphism?
Cataclastic Contact
Static None
14) The charnockite found south India are characteristic rocks of
Hornblend granulite Hornfels
Pyroxene granulite None
Q.2 Discuss the blue schist facies giving ACF diagram and state its significance in
plate tectonic.
14
Q.3 Describe mineralogy and origin of Kimberlites. Add an account on their
distribution in India.
14
Q.4 Discuss the metamorphism and magmatism associated with divergent plate
boundary.
14
Q.5 Explain the following:- 14
Retrograde metamorphism
Chemical classification of Igneous rocks
Q.6 Write short note on the following:-
Congruent and incongruent phase system
Barrovian grade of metamorphism.
14
Q.7 Discuss in short the following:-
S-type and I-type granite
Peridotites