Question:
Which of the following statement(s) related to ore-forming processes is/are CORRECT?
Which of the following statement(s) related to ore-forming processes is/are CORRECT?
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Stratiform ore deposits typically form in sedimentary basins, while the Great Oxidation Event is linked with the formation of BIFs due to the rise in atmospheric oxygen.
Updated On: Sep 6, 2025
- Lateritization involves eluviation and illuviation processes
- Stratiform sediment-hosted copper (SSC)-type deposits are formed at mid-oceanic ridges
- Fluid phase separation is the major process of formation of Mississippi Valley (MV)-type deposits
- Formation of Superior-type banded iron formation (BIF) is related to the Great Oxidation Event
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Verified By Collegedunia
The Correct Option is A, D
Solution and Explanation
Step 1: Understanding the Processes.
- Lateritization involves eluviation and illuviation processes: This is correct. In lateritization, weathering leads to the leaching (eluviation) of soluble elements and the concentration (illuviation) of iron and aluminum oxides.
- Stratiform sediment-hosted copper (SSC)-type deposits are formed at mid-oceanic ridges: Incorrect. SSC-type deposits are more commonly associated with sedimentary basins, not mid-oceanic ridges.
- Fluid phase separation is the major process of formation of Mississippi Valley (MV)-type deposits: Incorrect. MV-type deposits are typically formed by hydrothermal fluids in large basins, but fluid phase separation is not the primary process.
- Formation of Superior-type banded iron formation (BIF) is related to the Great Oxidation Event: Correct. The formation of BIFs corresponds to the Great Oxidation Event, when oxygen levels in Earth's atmosphere increased.
Final Answer: \[ \boxed{(A), (D)} \]
- Lateritization involves eluviation and illuviation processes: This is correct. In lateritization, weathering leads to the leaching (eluviation) of soluble elements and the concentration (illuviation) of iron and aluminum oxides.
- Stratiform sediment-hosted copper (SSC)-type deposits are formed at mid-oceanic ridges: Incorrect. SSC-type deposits are more commonly associated with sedimentary basins, not mid-oceanic ridges.
- Fluid phase separation is the major process of formation of Mississippi Valley (MV)-type deposits: Incorrect. MV-type deposits are typically formed by hydrothermal fluids in large basins, but fluid phase separation is not the primary process.
- Formation of Superior-type banded iron formation (BIF) is related to the Great Oxidation Event: Correct. The formation of BIFs corresponds to the Great Oxidation Event, when oxygen levels in Earth's atmosphere increased.
Final Answer: \[ \boxed{(A), (D)} \]
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