Which mineral ore of tin was historically extracted on a massive industrial scale from alluvial gravels on the Jos Plateau?
Answer and explanation
Correct answer: A. cassiterite
- Step 1: Placer tin mining in Nigeria was centered around the granitic ring complexes of the Jos Plateau. Step 2. The principal tin ore mined is cassiterite (tin oxide, SnO2), often found together with columbite. Answer: cassiterite. Why not the others: Galena is lead ore; Sphalerite is zinc ore; Bauxite is aluminum ore.
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