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Mineralogy, Petrology & Economic Geology (Geology, Geophysics & Marine Sciences) Solved Questions & Notes (2026) - Apex Rankers

Earth, Geological & Marine Sciences > Geology, Geophysics & Marine Sciences > Mineralogy, Petrology & Economic Geology

100 Total Questions
~150 mins Read Time
1 Subject Areas
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Q. 1 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
The famous Saindak and Reko Diq deposits in Balochistan, Pakistan are world-class:
A
Bauxite aluminum ores
B
Lead-zinc carbonate ores
C
Porphyry Copper-Gold deposits
✓ Correct
D
Coal seams only
💡 Step-by-Step Explanation & Concept Rationale
Magmatic hydrothermal fluids generated massive porphyry copper-gold mineralization in Chagai arc.
Q. 2 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
Khewra Salt Mine in the Salt Range of Pakistan extracts rock salt from which geological formation?
A
Cretaceous sandstone
B
Tertiary limestone
C
Precambrian Salt Range Formation (Evaporite sequence)
✓ Correct
D
Pleistocene alluvium
💡 Step-by-Step Explanation & Concept Rationale
Thick Precambrian evaporites formed from desiccating Tethyan marine basins.
Q. 3 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
Which mineral is the primary source of Chromium ore mined extensively in Muslim Bagh, Balochistan?
A
Magnetite
B
Chalcopyrite
C
Hematite
D
Chromite (FeCr2O4)
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Ophiolitic ultramafic rocks in Muslim Bagh host significant podiform chromite bodies.
Q. 4 MULTIPLE_CHOICE
Difficulty: HARD (1 Mark)
Petroleum and natural gas in the Indus Basin of Pakistan are predominantly trapped in:
A
Recent sand dunes
B
Anticlinal structures and fault traps in Cretaceous/Eocene sandstones and limestones (e.g. Sui, Mari)
✓ Correct
C
Volcanic vents
D
Granite plutons
💡 Step-by-Step Explanation & Concept Rationale
Porous reservoir rocks capped by impervious shales form productive petroleum plays.
Q. 5 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
The metamorphism of limestone under heat and pressure produces:
A
Quartzite
B
Gneiss
C
Marble
✓ Correct
D
Slate
💡 Step-by-Step Explanation & Concept Rationale
Calcite recrystallizes into an interlocking mosaic of coarse calcite crystals in marble.
Q. 6 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
In professional practice: The famous Saindak and Reko Diq deposits in Balochistan, Pakistan are world-class:
A
Lead-zinc carbonate ores
B
Bauxite aluminum ores
C
Coal seams only
D
Porphyry Copper-Gold deposits
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Magmatic hydrothermal fluids generated massive porphyry copper-gold mineralization in Chagai arc.
Q. 7 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
In professional practice: Khewra Salt Mine in the Salt Range of Pakistan extracts rock salt from which geological formation?
A
Pleistocene alluvium
B
Precambrian Salt Range Formation (Evaporite sequence)
✓ Correct
C
Tertiary limestone
D
Cretaceous sandstone
💡 Step-by-Step Explanation & Concept Rationale
Thick Precambrian evaporites formed from desiccating Tethyan marine basins.
Q. 8 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
In professional practice: Which mineral is the primary source of Chromium ore mined extensively in Muslim Bagh, Balochistan?
A
Chromite (FeCr2O4)
✓ Correct
B
Hematite
C
Magnetite
D
Chalcopyrite
💡 Step-by-Step Explanation & Concept Rationale
Ophiolitic ultramafic rocks in Muslim Bagh host significant podiform chromite bodies.
Q. 9 MULTIPLE_CHOICE
Difficulty: HARD (1 Mark)
In professional practice: Petroleum and natural gas in the Indus Basin of Pakistan are predominantly trapped in:
A
Granite plutons
B
Recent sand dunes
C
Anticlinal structures and fault traps in Cretaceous/Eocene sandstones and limestones (e.g. Sui, Mari)
✓ Correct
D
Volcanic vents
💡 Step-by-Step Explanation & Concept Rationale
Porous reservoir rocks capped by impervious shales form productive petroleum plays.
Q. 10 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
In professional practice: The metamorphism of limestone under heat and pressure produces:
A
Slate
B
Gneiss
C
Marble
✓ Correct
D
Quartzite
💡 Step-by-Step Explanation & Concept Rationale
Calcite recrystallizes into an interlocking mosaic of coarse calcite crystals in marble.
Q. 11 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
According to standard examination standards: The famous Saindak and Reko Diq deposits in Balochistan, Pakistan are world-class:
A
Coal seams only
B
Lead-zinc carbonate ores
C
Bauxite aluminum ores
D
Porphyry Copper-Gold deposits
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Magmatic hydrothermal fluids generated massive porphyry copper-gold mineralization in Chagai arc.
Q. 12 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
According to standard examination standards: Khewra Salt Mine in the Salt Range of Pakistan extracts rock salt from which geological formation?
A
Pleistocene alluvium
B
Precambrian Salt Range Formation (Evaporite sequence)
✓ Correct
C
Cretaceous sandstone
D
Tertiary limestone
💡 Step-by-Step Explanation & Concept Rationale
Thick Precambrian evaporites formed from desiccating Tethyan marine basins.
Q. 13 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
According to standard examination standards: Which mineral is the primary source of Chromium ore mined extensively in Muslim Bagh, Balochistan?
A
Magnetite
B
Chalcopyrite
C
Chromite (FeCr2O4)
✓ Correct
D
Hematite
💡 Step-by-Step Explanation & Concept Rationale
Ophiolitic ultramafic rocks in Muslim Bagh host significant podiform chromite bodies.
Q. 14 MULTIPLE_CHOICE
Difficulty: HARD (1 Mark)
According to standard examination standards: Petroleum and natural gas in the Indus Basin of Pakistan are predominantly trapped in:
A
Volcanic vents
B
Anticlinal structures and fault traps in Cretaceous/Eocene sandstones and limestones (e.g. Sui, Mari)
✓ Correct
C
Recent sand dunes
D
Granite plutons
💡 Step-by-Step Explanation & Concept Rationale
Porous reservoir rocks capped by impervious shales form productive petroleum plays.
Q. 15 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
According to standard examination standards: The metamorphism of limestone under heat and pressure produces:
A
Marble
✓ Correct
B
Slate
C
Quartzite
D
Gneiss
💡 Step-by-Step Explanation & Concept Rationale
Calcite recrystallizes into an interlocking mosaic of coarse calcite crystals in marble.
Q. 16 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
From an applied perspective: The famous Saindak and Reko Diq deposits in Balochistan, Pakistan are world-class:
A
Porphyry Copper-Gold deposits
✓ Correct
B
Bauxite aluminum ores
C
Lead-zinc carbonate ores
D
Coal seams only
💡 Step-by-Step Explanation & Concept Rationale
Magmatic hydrothermal fluids generated massive porphyry copper-gold mineralization in Chagai arc.
Q. 17 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
From an applied perspective: Khewra Salt Mine in the Salt Range of Pakistan extracts rock salt from which geological formation?
A
Cretaceous sandstone
B
Pleistocene alluvium
C
Precambrian Salt Range Formation (Evaporite sequence)
✓ Correct
D
Tertiary limestone
💡 Step-by-Step Explanation & Concept Rationale
Thick Precambrian evaporites formed from desiccating Tethyan marine basins.
Q. 18 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
From an applied perspective: Which mineral is the primary source of Chromium ore mined extensively in Muslim Bagh, Balochistan?
A
Magnetite
B
Hematite
C
Chalcopyrite
D
Chromite (FeCr2O4)
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Ophiolitic ultramafic rocks in Muslim Bagh host significant podiform chromite bodies.
Q. 19 MULTIPLE_CHOICE
Difficulty: HARD (1 Mark)
From an applied perspective: Petroleum and natural gas in the Indus Basin of Pakistan are predominantly trapped in:
A
Anticlinal structures and fault traps in Cretaceous/Eocene sandstones and limestones (e.g. Sui, Mari)
✓ Correct
B
Volcanic vents
C
Granite plutons
D
Recent sand dunes
💡 Step-by-Step Explanation & Concept Rationale
Porous reservoir rocks capped by impervious shales form productive petroleum plays.
Q. 20 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
From an applied perspective: The metamorphism of limestone under heat and pressure produces:
A
Slate
B
Gneiss
C
Marble
✓ Correct
D
Quartzite
💡 Step-by-Step Explanation & Concept Rationale
Calcite recrystallizes into an interlocking mosaic of coarse calcite crystals in marble.
Q. 21 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
Under standard operational protocols: The famous Saindak and Reko Diq deposits in Balochistan, Pakistan are world-class:
A
Coal seams only
B
Porphyry Copper-Gold deposits
✓ Correct
C
Bauxite aluminum ores
D
Lead-zinc carbonate ores
💡 Step-by-Step Explanation & Concept Rationale
Magmatic hydrothermal fluids generated massive porphyry copper-gold mineralization in Chagai arc.
Q. 22 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
Under standard operational protocols: Khewra Salt Mine in the Salt Range of Pakistan extracts rock salt from which geological formation?
A
Pleistocene alluvium
B
Tertiary limestone
C
Precambrian Salt Range Formation (Evaporite sequence)
✓ Correct
D
Cretaceous sandstone
💡 Step-by-Step Explanation & Concept Rationale
Thick Precambrian evaporites formed from desiccating Tethyan marine basins.
Q. 23 MULTIPLE_CHOICE
Difficulty: MEDIUM (1 Mark)
Under standard operational protocols: Which mineral is the primary source of Chromium ore mined extensively in Muslim Bagh, Balochistan?
A
Magnetite
B
Chalcopyrite
C
Hematite
D
Chromite (FeCr2O4)
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Ophiolitic ultramafic rocks in Muslim Bagh host significant podiform chromite bodies.
Q. 24 MULTIPLE_CHOICE
Difficulty: HARD (1 Mark)
Under standard operational protocols: Petroleum and natural gas in the Indus Basin of Pakistan are predominantly trapped in:
A
Recent sand dunes
B
Anticlinal structures and fault traps in Cretaceous/Eocene sandstones and limestones (e.g. Sui, Mari)
✓ Correct
C
Volcanic vents
D
Granite plutons
💡 Step-by-Step Explanation & Concept Rationale
Porous reservoir rocks capped by impervious shales form productive petroleum plays.
Q. 25 MULTIPLE_CHOICE
Difficulty: EASY (1 Mark)
Under standard operational protocols: The metamorphism of limestone under heat and pressure produces:
A
Slate
B
Gneiss
C
Quartzite
D
Marble
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Calcite recrystallizes into an interlocking mosaic of coarse calcite crystals in marble.
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