India — Mineral & energy resources

India's mineral and energy geography is a distribution topic first: UPSC usually asks where a resource occurs, why it occurs there, and what economic or environmental consequence follows.

• Resource versus reserve: a mineral occurrence becomes a reserve only when grade, quantity, technology, legality, and market conditions make extraction feasible; an inferred lithium resource is not the same as a producing mine.
• Geological control: old shield rocks of the Peninsular plateau host most metallic minerals; sedimentary basins host most coal, lignite, petroleum, and natural gas; Himalayan young fold belts are richer in hydropower potential than in large metallic belts.
• Economic control: bulky minerals such as coal, iron ore, limestone, and bauxite pull industries toward mines, ports, rail corridors, or power plants; high-value low-volume minerals can move farther.
• Conventional energy: coal, lignite, petroleum, natural gas, large hydropower, and nuclear minerals still matter for baseload power, fertilizer, steel, transport fuels, and strategic autonomy.
• Renewable energy: solar, wind, small hydro, biomass, and emerging green hydrogen depend on radiation, wind corridors, water flow, agricultural residue, land, transmission, storage, and state policy.
• Spatial trap: Odisha may dominate many metallic minerals, but coal reserves and production, iron ore, bauxite, chromite, and manganese have different state-wise orders; never treat “eastern India” as one uniform answer.
• UPSC approach: read every map with four layers: physical formation, state/district cluster, linked industry, and governance constraint.
• Classification discipline: separate metallic, non-metallic, fuel, atomic and critical minerals before memorising states; the same district may contain several resources, but the exam statement usually hinges on one category.
• Scale discipline: a national map answer may be wrong at district scale; for example, writing “Odisha has iron ore” is correct broadly, but Keonjhar, Sundargarh and Mayurbhanj give the statement its map precision.
• Source hierarchy: NCERT gives the stable map base; Indian Bureau of Mines, Ministry of Coal, MoSPI, MNRE and CEA update the figures. Prefer a dated official figure over a coaching-rank table when state order is volatile.
• Map memory order: first mark plateaus and basins, then river valleys and coasts, then ports and power corridors; this order reduces random memorisation.