Minerals, Energy and Industries

A mineral is a naturally occurring substance with a definite chemical make-up, and an ore is a mineral from which a metal can be taken out profitably. India's minerals are not scattered at random. They sit where the old, hard rocks of the Peninsula are exposed, because metals and coal were locked into those ancient rocks millions of years ago. That one idea explains why steel plants, coal mines and mining towns crowd together in the east and centre of the country, while the young alluvial plains of the north have almost no minerals at all.

For exams, remember the working definition: a ferrous mineral is one that carries iron or goes into making steel (manganese, chromite, nickel), and a non-ferrous mineral is one with little or no iron. So bauxite, copper, lead, zinc, tin, gold and silver are non-ferrous, while iron ore and manganese are ferrous. India is rich in iron ore, manganese, bauxite, mica and coal, but poor in copper, lead, zinc, tin, nickel, cobalt, graphite and sulphur, and so imports them.

The Chotanagpur Plateau is called the 'storehouse of minerals' and the 'Ruhr of India' because very old rocks bring iron ore, coal, manganese, bauxite and mica together in one region, and the Damodar valley supplies both coal and water. The Ruhr is Germany's great coal-and-steel region, so the nickname simply means 'India's heavy-industry heartland'.

Iron is the backbone of modern industry, so we begin with iron ore. Ore comes in four types, and the guiding idea is simple: the more iron in the rock, the better the ore. Magnetite is the richest and is magnetic, hematite is the most important in quantity, limonite is weaker because it is hydrated, and siderite is poor and carries impurities. India's best ores are found in the old rocks of the east and the Karnataka-Goa region.

Now the other metals. Each has one or two states that you must pin down, because the examiner almost always asks 'which state produces the most?' or 'where is this mine?'. Read the table row by row, and notice the pattern: Odisha leads in chromite, bauxite and manganese reserves; Rajasthan is the home of copper, lead and zinc; Karnataka is the gold state.

Non-metallic minerals give us no metal, but we use them everywhere: in cement, glass, fertiliser, electrical goods, jewellery and even kitchen salt. Here the exam question is nearly always a simple 'mineral and its state', so build a table in your head. Notice again the pattern: Rajasthan dominates gypsum, phosphate and building stones, Jharkhand is the mica state, and Madhya Pradesh holds almost all of India's diamonds.

Now the atomic (nuclear) minerals. They matter because they fuel India's three-stage nuclear programme. Uranium comes mainly from Jharkhand, and thorium comes from monazite, a heavy mineral in the beach sands of the south-west and east coasts. Remember the coast: Kerala's Chavara-Palakkad belt, Tamil Nadu's Manavalakurichi, and Odisha's Chhatrapur near Ganjam. The Department of Atomic Energy says India holds about one-fifth of the world's thorium, and this is why the third stage of our programme is built on thorium.

Why does thorium sit in beach sand? Monazite is a heavy, hard mineral. When rivers and waves break down granite rocks, lighter material is washed away and the heavy monazite settles along the shore. That is why the thorium of India lies on the Kerala and Odisha coasts and not in mines in the interior.

Coal is the most important mineral fuel in India. It was formed when thick forests were buried under mud and sand and then slowly cooked by heat and pressure for millions of years. The longer the cooking, the richer the coal in carbon. So the ladder runs: peat, lignite, bituminous, anthracite, with carbon and heating value rising at each step. India's coal is mostly of the middle rank, bituminous, and most of it is non-coking.

Coal and the Gondwana rocks go together. Gondwana coal lies in the old river valleys of the Peninsula, and over 97 per cent of India's coal reserves are in the Damodar, Sone, Mahanadi and Godavari valleys. This explains why the power and steel belt of the country sits on the east-central plateau.

Petroleum (mineral oil) is a different story. It forms from tiny sea creatures buried in sedimentary rocks of the Tertiary age, and it collects in anticlines and fault traps, with a layer of impermeable rock above and water or gas around it. So oil is found in sedimentary basins, never in the old crystalline rocks. India's oil comes from four regions: Assam, Gujarat, Mumbai High (offshore) and the east-coast basins, plus Barmer in Rajasthan. We still import nearly nine-tenths of the crude we use.

Natural gas is found with oil (associated gas) or on its own. It is cleaner than coal and is used for power, fertiliser, CNG for vehicles and piped cooking gas (PNG). Its share in India's energy mix is still small, about 6 per cent, while the government wants it near 15 per cent by 2030. The big gas pipeline to remember is the HBJ (Hazira-Bijaipur-Jagdishpur), about 1,700 km, run by GAIL. Imported LNG arrives at terminals such as Dahej, Hazira, Dabhol, Kochi and Ennore.

Electricity is India's lifeline, and the best way to learn power is to ask three questions: what fuel is used, where is the plant, and why there? Thermal plants burn coal, lignite or gas and are built near coalfields or ports. Hydro plants need a high dam on a river with a steady flow, so they sit in the hills. Nuclear plants need a lot of cooling water, so they sit on the coast or on big rivers. Solar and wind need sun and wind, so they cluster in Rajasthan, Gujarat, Karnataka and Tamil Nadu. As of 2025, coal-based thermal power still generates the largest share of electricity, while non-fossil sources have crossed half of India's installed capacity.

Nuclear power in India follows a three-stage programme designed by Homi J. Bhabha. The reason is simple: India has modest uranium but huge thorium. So the plan is to use the little uranium first, make plutonium from it, and finally burn thorium. As of 2025 India has seven operating nuclear sites, and the Union Budget 2025 announced a target of 100 GW of nuclear capacity by 2047.

Iron and steel is the basic or 'mother' industry because every other industry, from railways to buildings and machines, needs steel. Making one tonne of steel needs a lot of heavy raw material: iron ore, coking coal, limestone, manganese and water. Since these are heavy and lose weight when processed, plants rise where the raw materials meet, mainly on the Chotanagpur plateau, which is why Jamshedpur, Bokaro, Rourkela, Durgapur and Bhilai all lie in a belt of eastern India. Learn the plants with year and the foreign partner, because that is where questions come from.

Now the other major industries. Each one has a logic for where it sits. Cotton textiles were first set up in Mumbai because the Deccan black-soil cotton lay behind it, the humid sea air kept threads from snapping, and the port brought in machinery. Cement follows limestone. Sugar sits in the cane belt. Aluminium follows cheap power. Learn the nicknames and centres in the table; they are a favourite of the examiner.

Why does the sugar industry go where it goes? Cane is heavy and loses sucrose if it waits, so mills must stand in the cane fields. This is a weight-losing, perishable raw material. Likewise, steel plants stand near the ore and coal. But a bakery or soft-drink plant stands near the city, because its product is perishable or bulky after making. This is the simple idea behind industrial location.

An industry is a place or activity where raw material is turned into a more useful product. Geographers sort industries in four ways: by raw material, by size (weight and capital), by ownership, and by role in the economy. The classification looks long, but the idea behind each line is a single sentence, as you will see in the table.

Industries also cluster into industrial regions. The government and geographers recognise eight major regions and several minor ones. The most important one for exams is the Chotanagpur region, called the Ruhr of India. Notice that the region names are really names of regions made of two or three cities (Mumbai-Pune, Gurugram-Delhi-Meerut), except where one great city dominates (Hooghly).

Minor industrial regions include Ambala-Amritsar, Saharanpur-Muzaffarnagar-Bijnor, Indore-Dewas-Ujjain, Jaipur-Ajmer, Kolhapur-South Kannada, Northern Malabar, Middle Malabar, Adilabad-Nizamabad, Allahabad-Varanasi-Mirzapur, Bhojpur-Munger, Durg-Raipur, Bilaspur-Korba and the Brahmaputra Valley. Do not memorise them as a list; remember only that the Kolhapur-South Kannada and Durg-Raipur names are minor regions, so they are traps when a question asks for 'major' ones.

Weber's idea of least-cost location explains almost everything here: a factory goes where the total cost of bringing raw material in and sending the product out is the lowest. If raw material is heavy and loses weight (iron ore), the factory goes to the source. If the product is perishable (bread), the factory goes to the market.