Question

Which of the following are the characteristics of a typical porphyry copper deposit?
I. Associated with granitic rocks
II. Low-grade and high tonnage of ore
III. Presence of alteration zones
IV. Occurrence in convergent tectonic settings

• A. I only
• B. I and IV only
• C. I, II, III and IV only
• D. II, III and IV only

Hint:

Porphyry copper deposits are significant sources of copper and are typically associated with large-scale geological processes in convergent plate boundaries.

Answer 1

The Correct Option is C

Step 1: Characteristics of Porphyry Copper Deposits.
Porphyry copper deposits are large, low-grade deposits typically associated with granitic rocks (I), found in convergent tectonic settings (IV). These deposits are characterized by low-grade and high tonnage of ore (II), and often contain alteration zones (III).
Step 2: Conclusion.
The correct answer is (C) I, II, III and IV only, as all four characteristics are true for porphyry copper deposits.