Which province in Indonesian Borneo contains the nation's premier commercial bauxite mining reserves, supporting domestic alumina smelting facilities at Tayan and Ketapang?
Answer and explanation
Correct answer: B. West Kalimantan
- Step 1: West Kalimantan holds the majority of Indonesia's proven bauxite reserves, found in lateritic weathering crusts. Step 2. Bauxite downstreaming policies mandate processing raw ore into chemical-grade and smelter-grade alumina domestically. Answer: West Kalimantan. Why not the others: South and East Kalimantan are predominantly coal-bearing provinces.
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