Mineral and Energy Resources

The One Thing

India’s diverse geological structure gives it varied but unevenly distributed mineral and energy resources that underpin industrialisation, transport, agriculture, construction, and daily life. Because these resources are finite and extraction can damage environments and communities, development must be combined with conservation, recycling, efficient technology, responsible mining, and expansion of renewable energy.

Who and What

• Mineral: A naturally occurring substance with a definite chemical composition and physical properties. Minerals have economic value and are essential to industrial and economic development.
• Metallic minerals: Minerals containing metals that can be processed to obtain them, including iron ore, manganese, copper, and bauxite.
• Ferrous minerals: Metallic minerals containing iron, including iron ore, manganese, and chromite.
• Non-ferrous minerals: Metallic minerals that do not contain iron as their main component, including copper, bauxite, lead, and zinc.
• Non-metallic minerals: Minerals that do not yield metals, including limestone, mica, gypsum, and salt.
• Ore: A mineral or rock from which a useful metal can be extracted economically.
• Iron ore: The basic raw material for the iron and steel industry. Its major Indian varieties are hematite and magnetite.
• Manganese: A mineral used mainly in steel manufacturing, ferro-alloys, batteries, chemicals, and paints.
• Bauxite: The principal ore of aluminium, used in aircraft, automobiles, electrical goods, packaging, and construction.
• Mica: A non-metallic mineral with excellent insulating properties, used in electrical and electronic industries.
• Limestone: A major raw material for cement and an important input in the iron and steel industry.
• Conventional energy resources: Traditional sources such as coal, petroleum, natural gas, and hydel power.
• Non-conventional energy resources: Renewable or alternative sources such as solar, wind, tidal, geothermal, and biogas energy.
• Coal: A fossil fuel formed from buried plant remains. It is used for electricity generation, industry, and domestic purposes.
• Lignite: A low-grade brown coal with high moisture content and lower calorific value than bituminous coal.
• Petroleum: A liquid fossil fuel refined into petrol, diesel, kerosene, lubricants, and petrochemicals.
• Natural gas: A relatively clean fossil fuel found with petroleum or in separate deposits. It is used as a fuel and industrial raw material.
• Hydroelectricity: Electricity generated from the energy of flowing or falling water.
• Thermal electricity: Electricity produced by burning coal, petroleum, or natural gas to generate steam and turn turbines.
• Nuclear energy: Energy released through nuclear reactions, mainly using uranium and thorium.
• Resource conservation: The planned and careful use of resources to reduce waste, protect reserves, and meet the needs of future generations.
• Commercial energy: Energy used in agriculture, industries, transport, and households.
• Non-commercial energy: Traditionally includes firewood, cattle dung, and agricultural waste.
• Electricity consumption: Commonly expressed in kilowatt-hours. 1 kilowatt-hour equals 1,000 watts used continuously for 1 hour, or 3.6 megajoules.
• Energy consumed: Energy consumed = Power × Time.
• Installed power capacity: The maximum electrical power that generating equipment can produce under specified conditions.

Causes and Consequences

• Mineral distribution is uneven because mineral formation depends on geological processes, rock type, and the time period of formation. The Peninsular Plateau, especially the Chota Nagpur Plateau, is a major mineral-rich region.

• The north-eastern plateau, including parts of Odisha, Jharkhand, Chhattisgarh, and West Bengal, contains important deposits of coal, iron ore, manganese, mica, and bauxite. The south-western plateau includes mineral-rich areas of Karnataka, Goa, and parts of Tamil Nadu and Kerala.

• The north-western region, including Rajasthan and parts of Gujarat, is important for copper, zinc, lead, gypsum, limestone, and other minerals. These regional concentrations influence the location of mineral-based industries, which also depends on raw materials, power, transport, labour, and markets.

• Important iron ore belts include the Odisha-Jharkhand belt, the Durg-Bastar-Chandrapur belt, the Bellary-Chitradurga-Chikmagalur-Tumakuru belt, and the Maharashtra-Goa belt. These belts support the iron and steel industry.

• Major coalfields occur in the Damodar Valley, Son Valley, Mahanadi Valley, and Godavari Valley. Gondwana coal, concentrated mainly in peninsular India, is generally older and of better quality than Tertiary coal.

• Coal grades include anthracite, bituminous, lignite, and peat, arranged broadly from higher to lower carbon content and calorific value. Coal remains important for India’s energy supply, but dependence on fossil fuels causes pollution and contributes to climate change.

• Petroleum deposits occur mainly in the Mumbai High region, Gujarat, Assam, and the Krishna-Godavari and Cauvery basins. Petroleum provides both energy and industrial raw materials, but domestic reserves are limited and unevenly distributed.

• Natural gas occurs with petroleum and in independent fields, including the western offshore region and the Krishna-Godavari basin. Its relatively cleaner combustion makes it significant for energy supply, although it remains an exhaustible fossil fuel.

• Uranium deposits occur in Jharkhand, Andhra Pradesh, Telangana, and Rajasthan. Thorium is associated mainly with monazite sands along the coastal regions of Kerala, Tamil Nadu, Andhra Pradesh, and Odisha. These resources support nuclear energy, but nuclear development depends on resource availability and appropriate technology.

• Hydroelectric power depends on water availability, relief, river flow, and the construction of dams and reservoirs. Thermal electricity depends on burning coal, petroleum, or natural gas; therefore, its expansion can increase pollution and fossil-fuel dependence.

• India has strong solar potential because much of the country receives abundant sunshine, especially in western and southern regions. Wind energy is well developed in Tamil Nadu, Gujarat, Maharashtra, Karnataka, Rajasthan, and Andhra Pradesh.

• Biogas is produced from animal dung, agricultural waste, and organic matter; its residue can be used as manure. Tidal energy has potential in the Gulf of Khambhat, the Gulf of Kachchh, and the Sundarbans region. These sources can reduce dependence on exhaustible fuels and provide cleaner, more decentralised energy.

• Mineral extraction may cause land degradation, deforestation, soil erosion, water pollution, air pollution, and displacement of communities. Sustainable mining must therefore balance economic development with environmental protection and the rights of local communities.

• Conservation measures include improved mining technology, reducing wastage, recycling metals, using substitutes, restoring mined land, and promoting renewable energy. Efficient technology and responsible consumption can extend the life of finite mineral resources.

• Electricity use is measured through the relationship Energy consumed = Power × Time. Since 1 kilowatt-hour equals 1,000 watts used continuously for 1 hour, or 3.6 megajoules, electricity demand can be quantified and compared through standard units.

What Gets Asked

• Why are minerals unevenly distributed in India, and how do the Peninsular Plateau, Chota Nagpur Plateau, north-eastern plateau, south-western plateau, and north-western region differ in mineral importance?
• Compare metallic, ferrous, non-ferrous, and non-metallic minerals, using iron ore, manganese, chromite, copper, bauxite, limestone, mica, gypsum, and salt as examples.
• Explain the distribution, uses, and relative importance of coal, petroleum, and natural gas, including the major coalfields, petroleum regions, and the distinction between Gondwana and Tertiary coal.
• Compare hydroelectricity, thermal electricity, nuclear energy, solar energy, wind energy, biogas, and tidal energy in terms of resource base, environmental effects, and potential for sustainable development.
• Assess the environmental and social consequences of mining and explain how improved technology, reduced wastage, recycling, substitution, land restoration, and renewable energy can support resource conservation.
• Explain the equations and units used in energy consumption: Energy consumed = Power × Time and 1 kilowatt-hour = 1,000 watts used continuously for 1 hour = 3.6 megajoules.