Economic Geology Model Test Paper
Geology Question Paper
Q.1: Which metals may be obtained from the stagnate ore mineral:
(a) Copper and zinc.
(b) Zinc and silver.
(c) Copper and Tungsten.
(d) Copper and Tin.
ANSWER.(d)
Q.2 : Kaolin adsorbs copper from solution to form :
(a) Azurite.
(b) Chalcoclte.
(c) Chrysocolla.
(d) Atacamite.
ANSWER.(c)
Q.3: The formation temperature of different magmatic deposits varies from :
(a) 2000° to 500 °c.
(b) 1500°c to 300°c.
(C) 1000°c to 2oo°
(d) 800°c to 100°c.
ANSWER.(b)
Q.4 : Match the following :
I II
1. Dissemination. i. Chromite deposits ot Keonjhar (orissa).
2. Segregation. ii. Titeniferous magnetite deposits in
Adirondack region ot New York.
3. Residual liquid segregation. iii. Uranium deposits of Jaduguda (Bihar).
4. Residual liquid injection. iv. Titaniferouns magnetite bands of
Bushveld complex.
(a) 1-iii, 2-i, 3-iv, 4-ii.
(b) 1-ii, 2-iii, 3-iv, 4-i.
(c)1-i, 2-ii, 3-iii, 4-iv.
(d)1-iii, 2-i, 3~ii, 4- iv.
ANSWER.(a)
Q.5 : Diamond In kimberlite and corundum In nepheline syenlte are good examples ot
(a) Disseminated deposit.
(b) Segregated deposit.
(c) Injected deposit.
(d) Pegmatitic deposit.
ANSWER.(a)
Q.6 : Magmatic magnetite deposits occur with :
(a) High viscosity.
(b) Diorite
(c) Syenite.
(d) Pegmatite. .
ANSWER.(c)
Q.7 : Platinum occurs only with :
(a) Mafic rocks.
(b) Ultramafic rocks.
(c) Mafic to rocks.
(d) Mafic to Ultrabasic rocks.
ANSWER.(d)
Q.8 : The metasomatic deposits are usually resulted in :
(a) Calcareous rocks.
(b) Arenaceous rocks.
(c) Ferrugenous rocks.
(d) Siliceous rocks.
ANSWER. (a)
Q.9 : An assemblage ot high temperature metamorphic gangue minerals in contact
metasomatic deposits is called :
(a) Skarn.
(b) Gondite.
(c) Gossans.
(d) Bar deposits.
ANSWER.(a)
Q.11 : Generally tourmaline-rich rocks are products of :
(a) Metamorphism.
(b) Magmatic crystallisation.
(c) Metasomatism.
(d) Oxidation and supergene enrichment.
ANSWER.(c)
Q.12: Hydrothermal deposits, which are formed at great depths, near the intrusive and within the
Temperature range of 300°c to 500°c is called:
(a) Hypothermal deposits.
(b) Mesothermal deposits.
(c) Epithermal deposits.
(d) Syngenetic deposits.
ANSWER.(a)
Q.13: Cavities in the vein left untilled are called:
(a) Crusification.
(b) Bugs.
(c) Comb structure
(d) None of these.
ANSWER.(b)
Q.14: Dilation or Lenticular vein are generally associated with:
(a) Granites.
(b) Schists.
(C) Basalts.
(d) Marbles.
ANSWER.(b)
Q.15: Match the following:
I II
1. Stock works. i) Mineralisation along the crests of anticlines.
2. Saddle reefs. ii) Transverse and roughly parallel fraction frilled with the ore.
3. Ladder veins. iii) An interlacing network of small ore-bearing vein lets.
4. Gash veins. iv) Small wedge-shaped fissures filled with the ores.
(a) 1-ii, 2-i, 3-iii, 4-iv.
(b) 1-i, 2-ii, 3-iii, 4-iv.
(c)1-iii, 2-I,3-ii, 4-iv.
(d) 1-iv, 2-iii, 3-ii, 4-i.
ANSWER.(c)
Q.16: When copper ores occupying sandstone pores then it is known as:
(a) Sandy ores.
(b) Sandstone copper ores.
(c) Pore ores.
(d) Red beds ores.
ANSWER.(d)
Q.17: Metasomatic replacement deposits are characterised by:
(a) Preservation of rock structure.
(b) Presence of pseudo morphs of replacing minerals after the replaced one.
(C) Absence of Crusification.
(d) All the above.
ANSWER.(d)
Q.18: Ore shoots are most characteristic of:
(a) Fissure veins only.
(b) Replacement loads only.
(C) Fissure veins and replacement loads.
(d) Breccia-filling deposits.
ANSWER.(c)
Q.19: An exceptionally rich shoot or bunch of ore is called:
(a) Bonanza.
(b) Chimneys.
(c) Flake.
(d) Pitch.
ANSWER.(a)
Q.20: Most of metal enrichments result due to:
(a) Removal of the gangue components.
(b) Chemical migration.
(c) Redeposit ion.
(d) All the above.
ANSWER.(d)
Q.21: Mark the correct statement regarding deposition of pyrite:
(a) lt is deposited in a reducing environment.
(b) lt is deposited under both acid and alkaline condition,
(c) It is deposited in oxidising environment under both acid and alkaline conditions.
(d) lt is deposited in a reducing environment under both acid and alkaline conditions.
ANSWER.(d)
Q.22: Hematite forms in:
(a) An alkaline oxidising environment.
(b) An acidic oxidising environment.
(c) An alkaline reducing environment.
(d) An acidic reducing environment.
ANSWER.(a)
Q.23 : lron is commonly precipitated as :
(a) Siderite.
(b) Limonite.
(c) Hematite.
(d) All the above are correct.
ANSWER.(d)
Q.24 : In the case of chemical precipitation from carbonate solutions, the separation of
Monroe from Fe occurs because:
(a) Mn carbonate is more soluble in solution than Fe carbonate.
(b) Mn carbonate is more stable in solution than Fe carbonate.
(c) Both Mn and Fe carbonates are not soluble in solution.
(d) None of these.
ANSWER.(b)
Q.25: Under which environment both Iron and manganese may precipitate together as
Carbonates:
(a) Oxidising environment.
(b) Reducing environment.
(c) Neutral environment.
(d) Both (a) and (b).
ANSWER.(c)
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