Kimberlite pipes tend to occur in which part of cratons?

• A. Center
• B. Edges
• C. Outer regions
• D. Throughout

Answer: (A)

Kimberlite pipes come from volatile-rich mantle magmas that rise rapidly through thick, cold, stable lithosphere. Cratons are the oldest, most rigid parts of continents with especially thick lithospheric roots, particularly at their centers. This combination creates long-lived mantle reservoirs and conditions that favor deep-sourced kimberlite volcanism that can sample diamonds and other deep materials as it reaches the surface. The center of a craton provides the most favorable, stable plumbing for these eruptions, whereas the edges are more tectonically active and thinner, making persistent pipe formation less likely. That’s why these pipes are typically found in the interior of cratons.