What caused a shift in emphasis from secondary to primary diamond mining?

What caused a shift in emphasis from secondary to primary diamond mining?

• A. Increased market demand
• B. Improved technology
• C. Political stability
• D. Environmental concerns

Answer: (B)

The main idea is that better mining and processing technology made it feasible to access and profitably extract diamonds from primary deposits, not just from river-derived secondary deposits. Early diamond mining relied on alluvial deposits because they were easier to reach with simple tools. As technology advanced—more powerful excavation methods, blasting, underground extraction, and more efficient ore processing—the economics of mining changed. Primary sources like kimberlite pipes became accessible and worth developing, leading to a shift toward primary diamond mining. While demand, political stability, or environmental concerns can influence mining in the long run, the ability to economically exploit primary deposits is the direct driver of this shift.

The main idea is that better mining and processing technology made it feasible to access and profitably extract diamonds from primary deposits, not just from river-derived secondary deposits. Early diamond mining relied on alluvial deposits because they were easier to reach with simple tools. As technology advanced—more powerful excavation methods, blasting, underground extraction, and more efficient ore processing—the economics of mining changed. Primary sources like kimberlite pipes became accessible and worth developing, leading to a shift toward primary diamond mining.

While demand, political stability, or environmental concerns can influence mining in the long run, the ability to economically exploit primary deposits is the direct driver of this shift.