Free Geology Solved MCQ
Geology objective test For PG exams Like UGC
1: The term "ore" includes:
(a) Ore minerals only.
(b) Gangue minerals only.
(c) Ore Minerals and gangue minerals both.
(d) Gangue and tenor.
ANSWER.(c)
2: The term 'Tenor" indicates:
(a)The metal content of an ore.
(b) The gangue content of-an ore.
(c) The method of formation of mineral deposits.
(d) The ore percent in a ore deposits.
ANSWER.(a)
3 : Pyrite would be expected to form in a :
(a) Oxidising environment.
(b) Reducing environment.
(c) Both oxidising and reducing environments.
(d) None of these.
ANSWER.(b)
4 :The early magmatic deposits are usually formed by :
(a) Simple crystallisation without concentration.
(b) Segregation of early formed crystals.
(c) Injections ot materials concentrated elsewhere by differentiation.
(d) All the above.
ANSWER.(d)
5 : Nickeliterous sulphide deposits ot sudbury (U.S.A.) is an example of :
(a) Dissemination.
(b) Residual liquid injection.
(C) lmmiscible liquid segregation.
(d) lmmiscible liquid injection.
ANSWER.(d)
6 : The larger crystals in the core ot zoned pegmatetes are the result of :
(a) High viscosity.
(b ) Low viscosity.
(c) High temperature.
(d) Low temperature.
ANSWER.(b)
7 : Pegmatitic deposits are usually formed between :
(a) 200°c to 5oo°c.
(b) 400°c to 1000°c
(c) 500°c to 800°.
(d) 800°c to 1200°c.
ANSWER.(c)
8 : Contact-metasomatism ls also known as :
(a) Orthostatic.
(b) Pyro metasomatism.
(c) Orthomagmatic.
(d) None of the above.
ANSWER.(b)
9: Mark the correct statement regarding contact-metasomatic deposits:
(a) These deposits are formed under high temperature and pressure condition.
(b) These deposits are generally discontinuous and irregular in shape.
(c) Commonly the ores are coarse in texture.
(d) All the statement are correct.
ANSWER.(d)
10 : Low quartz is formed :
(a) Above 573°c.
(b) Below 573°c.
(c) Above 543°c.
(d) Below 543°c.
ANSWER.(b)
11 : Hydrothermal deposits are mostly :
(a) Syngenetic.
(b) Epigenetic.
(c) Residual.
(d) Placer.
ANSWER.(b)
12: Exothermal deposits are characterised by:
(a) High initial temperature and pressure.
(b) Shallow depth of formation.
(c) Rapid cooling.
(d) All the above.
ANSWER.(d)
13: Masses of country-rocks enclosed within the fissure vein deposits are known as:
(a) Bugs.
(b) Ribbon structure.
(c) Horses.
(d) Pinches.
ANSWER.(c)
14 : Solution cavity fillings occur most commonly in :
(a) Granite rocks.
(b) Limestone rocks.
(c) Conglomerate rocks.
(d) Vesicular basalts.
ANSWER.(b)
15: Metasomatic replacement is the dominating process of mineral deposition in the
(a) Hypothermal deposit.
(b) Mesothermal deposit.
(c) Epithermal deposit.
(d) Hypothermal and Mesothermal deposits.
ANSWER.(d)
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