Chapter 5: Minerals and Energy Resources | Summary

Ferrous minerals account for about three-fourths of the total value of metallic mineral production in India, providing a strong base for metallurgical industries. Iron ore is the backbone of industrial development. Magnetite is the finest iron ore (up to 70% iron content) with excellent magnetic qualities, while hematite (50–60% iron content) is the most widely used industrial iron ore. In 2018–19, 97% of India's iron ore production came from Odisha, Chhattisgarh, Karnataka, and Jharkhand.

The four major iron ore belts are: (i) Odisha-Jharkhand belt — Badampahar mines in Mayurbhanj and Kendujhar; Gua and Noamundi in Singbhum. (ii) Durg-Bastar-Chandrapur belt — the Bailadila hills in Bastar, Chhattisgarh, with 14 deposits of super high-grade hematite exported via Vishakhapatnam. (iii) Ballari-Chitradurga-Chikkamagaluru-Tumakuru belt in Karnataka, including the Kudremukh mines (100% export unit), ore transported as slurry to Mangaluru. (iv) Maharashtra-Goa belt — iron ore exported via Marmagao port. Manganese is primarily used in steel and ferro-manganese alloy manufacture; nearly 10 kg is required to produce one tonne of steel.

India's reserves and production of non-ferrous minerals — copper, bauxite, lead, zinc, and gold — are not very satisfactory, yet these play a vital role in metallurgical, engineering, and electrical industries. India is critically deficient in copper reserves. Copper, being malleable, ductile, and a good conductor, is mainly used in electrical cables, electronics, and chemical industries. Major copper producers are Balaghat mines in Madhya Pradesh, Khetri mines in Rajasthan, and Singhbhum district of Jharkhand.

Bauxite is a clay-like substance from which alumina and then aluminium is obtained through decomposition of rocks rich in aluminium silicates. Aluminium combines the strength of metals like iron with extreme lightness, good conductivity, and great malleability. Major bauxite deposits are in the Amarkantak plateau, Maikal hills, and the Bilaspur-Katni plateau region. Odisha was the largest bauxite-producing state in 2018–19; Panchpatmali deposits in Koraput district are the most important in the state.

Mica is a non-metallic mineral made of plates or leaves that split into extremely thin sheets. It can be clear, black, green, red, yellow, or brown. Due to its excellent di-electric strength, low power loss factor, insulating properties, and resistance to high voltage, mica is one of the most indispensable minerals in electric and electronic industries. Major mica deposits are in the Koderma-Gaya-Hazaribagh belt of Jharkhand, around Ajmer in Rajasthan, and in the Nellore mica belt of Andhra Pradesh.

Limestone is found in sedimentary rocks of most geological formations and is associated with rocks composed of calcium carbonates or calcium and magnesium carbonates. It serves as the basic raw material for the cement industry and is essential for smelting iron ore in blast furnaces. Mining activities, while economically important, pose significant hazards: miners face pulmonary diseases from dust and noxious fumes, risks of roof collapse, inundation and mine fires, as well as environmental degradation from water contamination and land degradation from waste dumping.

Mineral resources are finite and non-renewable. The total volume of workable mineral deposits is only about one per cent of the earth's crust. Geological processes of mineral formation are extremely slow — minerals that took millions of years to form are being consumed at rates infinitely greater than the rate of replenishment. Continued extraction leads to increasing costs as minerals must be extracted from greater depths, alongside a decrease in ore quality.

A planned and sustainable approach to mineral use is essential. This includes improving technologies to allow use of low-grade ores at low costs, recycling metals, using scrap metals, and finding substitutes. Rich mineral deposits are the country's extremely valuable but short-lived possessions, requiring careful conservation for future generations.

Conventional energy sources include firewood, cattle dung cake, coal, petroleum, natural gas, and electricity (both hydel and thermal). Coal is India's most abundantly available fossil fuel and is used for power generation, industry, and domestic needs. It occurs in four grades: peat (low carbon, high moisture), lignite (low-grade brown coal — principal reserves at Neyveli, Tamil Nadu), bituminous (most popular commercial coal), and anthracite (highest quality hard coal). Gondwana coalfields (~200 million years old) are the major metallurgical coal reserves in the Damodar Valley (Jharia, Raniganj, Bokaro). Tertiary coals (~55 million years old) are found in northeastern states.

Petroleum provides fuel for heat, lighting, lubricants, and raw materials for manufacturing industries. It is associated with anticlines and fault traps in tertiary-age rock formations. Mumbai High, Gujarat, and Assam are the major petroleum-producing areas. Assam is the oldest oil-producing state (Digboi, Naharkatiya, Moran-Hugrijan). Natural gas, found with petroleum deposits, is used as domestic and industrial fuel, for electricity generation, as CNG (transport) and PNG (cooking). Major reserves are in Mumbai High, Cambay basin, and the Krishna-Godavari basin. The HVJ pipeline (1,700 km) built by GAIL linked Mumbai High with fertilizer and power complexes; the network has expanded to 18,500 km with plans for a 34,000 km Gas Grid.

Non-conventional energy sources — solar, wind, tidal, geothermal, biogas, and nuclear — are renewable alternatives to fossil fuels. Nuclear energy is obtained by altering atomic structure, releasing heat used to generate electricity. Uranium and Thorium (from Jharkhand and the Aravalli ranges) and Thorium from Monazite sands of Kerala are used. Solar energy is harnessed through photovoltaic technology and is becoming popular in rural areas. India, being a tropical country, has enormous solar potential. The largest wind farm cluster is in Tamil Nadu (Nagarcoil to Madurai); Andhra Pradesh, Karnataka, Gujarat, Kerala, Maharashtra, and Lakshadweep also have important wind farms.

Biogas is produced from shrubs, farm waste, and animal and human waste. It has higher thermal efficiency than kerosene, dung cake, and charcoal, and biogas plants (called 'Gobar gas plants') provide both energy and improved manure quality. Tidal energy can be harnessed from the Gulf of Khambhat, Gulf of Kuchchh, and the Gangetic delta in Sunderban. Geothermal energy uses heat from the earth's interior; two experimental projects are in Parvati Valley near Manikaran (Himachal Pradesh) and Puga Valley (Ladakh).

Energy is a basic requirement for economic development. All sectors — agriculture, industry, transport, commercial, and domestic — require energy inputs. India is presently one of the least energy-efficient countries in the world. Increasing dependence on fossil fuels creates supply security concerns, economic risks due to rising prices, and serious environmental problems. Promotion of energy conservation and increased use of renewable energy sources are the twin planks of sustainable energy development.

As responsible citizens, energy conservation can be practised by using public transport, switching off electricity when not in use, using power-saving devices, and adopting non-conventional energy sources. The principle that 'energy saved is energy produced' encapsulates the importance of efficiency alongside production.

Chapter 5 of NCERT Geography Class 10 provides a comprehensive understanding of India's mineral and energy resources — their formation, classification, distribution, and conservation. Minerals are finite, non-renewable resources whose exploitation must be balanced with sustainable practices such as recycling, use of substitutes, and adoption of low-grade ore technologies. Energy resources, both conventional and non-conventional, are critical to every sector of national development, and the shift towards renewable energy is both an environmental and economic necessity for India.

For board examinations, students must be thoroughly prepared on the classification and occurrence of minerals, the four iron ore belts, grades of coal (peat to anthracite), petroleum fields, and each non-conventional energy source along with their locations. Questions frequently test knowledge of specific states, ports, export destinations, and comparison between conventional and non-conventional energy. Application-based questions often link resource distribution with industrial location or energy conservation strategies.