GATE Geology Geophysics 2012 Paper Questions and Answers Part 3

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Common Data for Questions 50 and 51:

The following figure gives Mohr envelope for a rock and Mohr circle in a particular stress condition.

Fracturing occurs when the Mohr circle touches the Mohr envelope at B.

Fracturing occurs when the Mohr circle

Fracturing Occurs when the Mohr Circle

Q.50 What type of fractures will develop in the rock?

(A) Extension fractures

(B) Conjugate shear fractures

(C) Columnar fractures

(D) Hybrid extension-shear fractures

Answer: (D) Hybrid extension-shear fractures

Q.51 What is the dihedral angle?





Answer: (B)

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Linked Answer Questions

Linked Answer Questions 52 and 53:

Q.52 Ore deposit with significant content of molybdenum occurs in

(A) Thin Layers of Shale

(B) Basic-Ultrabasic Rocks

(C) Volcanogenic (Rhyolitic) Sedimentary Rocks

(D) Andesite Porphyry

Answer: (D) Andesite Porphyry

Q.53 An example of the above type of copper deposit is

(A) Kupfersciefer, Germany

(B) Chuquicamata, Chile

(C) Kurroko, Japan

(D) Sudbury, Canada

Answer: (B) Chuquicamata, Chile

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Statement for Linked Answer Questions 54 and 55:

Microfossils are widely used in palaeoceanographic studies.

Q.54 Which of the following microfossil groups is generally found in deep sea below the Carbonate Compensation Depth?

(A) Foraminifera

(B) Radiolaria

(C) Cocoliths

(D) Ostracods

Answer: (B) Radiolaria

Q.55 What is the test composition of the microfossil group identified above?

(A) Carbonate

(B) Phosphate

(C) Nitrate

(D) Siliceous

Answer: (D) Siliceous

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