Mineral and Energy Resources | ICSE Class 10 Geography Notes

This note covers mineral occurrence, iron ore, manganese, copper and bauxite, their uses and distribution, coal, petroleum and natural gas, hydroelectric projects, solar, wind, tidal, geothermal, nuclear and biogas energy, mining hazards, and resource conservation.

What are minerals, and why does their distribution matter?

A mineral is a naturally occurring substance with a uniform composition and a definable internal structure. Rocks contain minerals. Most rocks contain several minerals in varying proportions, although some consist of a single mineral. Minerals differ in colour, hardness and other physical properties.

An ore is an accumulation of a mineral mixed with other elements. Its useful mineral content must be sufficiently concentrated to make extraction commercially worthwhile. A mineral deposit does not automatically become a working mine: concentration, ease of extraction and distance from markets matter.

How are minerals grouped and found?

Metallic minerals provide metals. Iron ore and manganese belong to the ferrous, or iron-related, group used in iron and steel industries. Copper and bauxite belong to the non-ferrous group, supplying metals other than iron. Non-metallic minerals include mica and limestone. Mineral fuels, such as coal and petroleum, supply energy.

In rocks formed from molten material or changed by heat and pressure, minerals may occupy cracks and joints. Small occurrences are called veins; larger ones are lodes. In most cases, rising liquid, molten or gaseous mineral material cools and solidifies in these spaces.

In sedimentary rocks, formed through the accumulation of sediments, or deposited particles, minerals may occur in beds or layers. Bauxite forms differently: surface rocks decompose, soluble material is removed, and a mineral-bearing residue remains. Formation processes help explain why resources occur in particular regions.

Why are resources unevenly distributed?

Broadly speaking, peninsular rocks contain most coal reserves, meaning known stocks available for use, and most metallic-mineral reserves. Sedimentary rocks along the peninsula’s western and eastern sides, in Gujarat and Assam, contain most petroleum deposits. The northern alluvial plains, built from river deposits, are almost devoid of economic minerals.

Distribution means the geographical pattern of occurrence. It reflects differences in geological structure, processes and the time taken for minerals to form. Consequently, a useful mineral account connects the resource with its state, mining area and industrial use.

Why is iron ore important, and where is it found?

Iron ore supplies the basic mineral for iron and steel production and supports industrial development. India has fairly abundant iron ore resources, including good-quality ores. Two important varieties are magnetite and haematite, which differ in iron content and properties.

Magnetite is the finest iron ore, with iron content up to 70 per cent. Its excellent magnetic qualities make it especially valuable to the electrical industry. Haematite is the most important industrial iron ore in terms of the quantity used.

Haematite has a slightly lower iron content than magnetite, at 50 to 60 per cent. These figures describe ore composition. They do not describe a state’s share of production, and “up to” does not mean that every magnetite deposit contains exactly 70 per cent iron.

Which states and mining areas should be connected?

Odisha and Chhattisgarh provide two important state-and-area pairs: Badampahar and Bailadila, respectively. The Odisha-Jharkhand belt links adjoining iron-producing regions. The Durg-Bastar-Chandrapur belt extends through Chhattisgarh and Maharashtra, while another major belt crosses Karnataka.

The Maharashtra-Goa belt includes Goa and Maharashtra’s Ratnagiri district. Its ores are not of very high quality, yet they are efficiently exploited. This shows why ore quality alone does not explain mining: transport and commercial conditions also influence the use of a deposit.

The map uses red triangles for iron ore mines and separate symbols for manganese and bauxite. It labels Mayurbhanj, Gua, Bailadila, Ballari and Kudremukh. Read the legend before identifying a mineral location.

Reference: NCERT Class 10, page 46

How does manganese support industry, and what do production figures show?

Manganese is mainly used to manufacture steel and ferro-manganese, an alloy combining iron and manganese. An alloy is a mixture of a metal with other elements. Nearly 10 kilograms of manganese are needed to manufacture one tonne of steel.

Manganese is also used in bleaching powder, insecticides and paints. Its importance therefore extends beyond steel production. Nevertheless, its major connection with iron and steel makes the locations of manganese deposits important to the geography of these industries.

Which producing areas are important?

Madhya Pradesh has manganese deposits in the Balaghat-Chhindwara-Nimar-Mandla and Jhabua belt. In Maharashtra, important mining districts include Nagpur, Bhandara and Ratnagiri. These two states had the largest shares in the production figures for 2018 to 2019 shown below.

Odisha is another leading producer, with mines in areas including Bonai, Kendujhar, Sundergarh, Koraput and Kalahandi. Karnataka also has important deposits. Production percentages and lists of important producing areas answer different questions and should not be treated as interchangeable.

How should historical production data be read?

The table records state shares of manganese production in 2018 to 2019. A percentage is a share out of one hundred. These are dated production figures, not present-day rankings or measurements of the amount remaining underground.

The largest share in this table belongs to Madhya Pradesh, followed by Maharashtra. Odisha remains an important producer despite having a smaller share in that year. Always retain the year when comparing states because a production table describes a particular period.

Why are copper and bauxite valuable non-ferrous resources?

Copper is malleable, meaning it can be shaped into sheets, and ductile, meaning it can be drawn into wires. It also conducts electricity well. These properties explain its use in electrical cables, electronics and chemical industries.

Copper is used in electric motors, transformers and generators. India is critically deficient in copper reserves and production. Important producing areas include the Balaghat mines in Madhya Pradesh and Khetri mines in Rajasthan; Singhbhum in Jharkhand is another leading area.

How does bauxite become useful aluminium?

Bauxite is a clay-like ore from which alumina, an aluminium oxide, and then aluminium are obtained. Its deposits form through the decomposition of rocks rich in aluminium silicates. Soluble material is removed, leaving a residue containing the ore.

Aluminium combines strength with extreme lightness, good conductivity and great malleability. It is used in transport equipment and utensils. Distinguish the ore from the metal: bauxite is extracted from the ground, while aluminium is obtained by processing the ore.

Odisha’s Panchpatmali deposits in Koraput are especially important. Jharkhand’s Lohardaga area has rich bauxite deposits. Bauxite also occurs in the Amarkantak plateau, Maikal hills and Bilaspur-Katni plateau region. These locations connect mineral formation with plateau landscapes.

What does the bauxite production table establish?

Odisha was the largest bauxite-producing state in 2018 to 2019. Jharkhand was second in this table. Keep that date attached to the comparison. A reserve concerns mineral resources available for use; production concerns material actually extracted during a period.

How does coal provide energy, and what are its limitations?

Energy resources supply power for cooking, lighting, transport and industry. Conventional sources are long-established energy sources, including coal, petroleum, natural gas and hydroelectricity, or electricity from moving water. Non-conventional sources are alternatives such as solar, wind, tidal, geothermal, nuclear and biogas energy. This classification differs from the distinction between renewable and non-renewable resources.

Renewable resources can be replenished naturally, while non-renewable resources cannot be replaced on a timescale comparable with their consumption. A fossil fuel comes from buried organic material transformed over long periods. Coal, petroleum and natural gas belong to this group.

Coal forms through the compression of plant material over millions of years. Its character depends on compression, depth and duration of burial. It is India’s most abundantly available fossil fuel and supplies a substantial part of the country’s energy requirements.

How do coal varieties differ?

Metallurgical coal is high-grade bituminous coal valuable for smelting iron, which means extracting the metal through heating in a furnace. Gondwana coal occurs in rocks a little over 200 million years old; tertiary deposits are only about 55 million years old.

Where is coal found, and what are the trade-offs?

Jharia and Bokaro in Jharkhand and Raniganj in West Bengal are important Damodar valley coalfields. The Godavari, Mahanadi, Son and Wardha valleys also contain coal. Tertiary coal occurs in Meghalaya, Assam, Arunachal Pradesh and Nagaland. Neyveli in Tamil Nadu has principal lignite reserves.

Coal supplies industrial heat, domestic energy and thermal electricity, electricity produced using heat from fuel. Its disadvantages include depletion and pollution from burning fossil fuels. It is bulky and loses weight as it becomes ash, helping explain why heavy industries and thermal stations locate near coalfields.

Where are petroleum and natural gas found, and how are they used?

Petroleum, or mineral oil, provides fuel for heating and lighting, lubricants that reduce friction in machinery, and industrial raw materials. A refinery processes crude oil. Refineries support synthetic textile, fertiliser and chemical industries by supplying materials for further manufacture.

Most petroleum occurrences in India are associated with anticlines and fault traps in tertiary rocks. An anticline is an upward rock fold. Oil may collect at its crest in porous limestone or sandstone, whose spaces allow fluids to move.

Non-porous layers prevent oil from moving farther upward or downward. Fault traps occur where displaced rock layers trap petroleum. Gas is lighter and usually occurs above the oil. “Usually” is important: this is not an unqualified rule about every deposit.

Which oil and gas locations are important?

Mumbai High, an offshore field beneath the sea, Gujarat and Assam are major petroleum-producing areas. Ankleshwar is an important Gujarat field. Assam is India’s oldest oil-producing state, with important fields at Digboi, Naharkatiya and Moran-Hugrijan.

Natural gas occurs with petroleum and is released when crude oil reaches the surface. Major reserves lie in Mumbai High and neighbouring west-coast fields, with additional finds in the Cambay basin. The Krishna-Godavari basin is important on the east coast.

The map distinguishes coal mines with black triangles and oil fields with red squares. It labels Jharia, Raniganj, Mumbai High, Ankleshwar and Digboi. Mumbai High is shown offshore in the Arabian Sea.

Reference: NCERT Class 10, page 51

What are their advantages and disadvantages?

Petroleum has diverse uses as fuel, lubricant and industrial feedstock, meaning raw material for another industry. Natural gas supplies domestic cooking, industrial heating, electricity generation and transport. It also provides raw material for fertiliser, chemical and petrochemical industries, which process petroleum-derived materials.

Both resources are exhaustible, meaning their stocks can be used up. Growing reliance on oil and gas creates concerns about rising prices and potential shortages. Burning fossil fuels causes environmental problems, so useful applications must be considered alongside conservation and pollution control.

How does hydel power work, and what do the two major projects provide?

Hydel power, or hydroelectricity, is electricity generated by moving water. Fast-flowing water turns a turbine, a rotating machine driven by moving water or another fluid. The turbine’s motion is used to generate electricity. The water resource is renewable.

A dam is a barrier across flowing water that obstructs, directs or slows the flow, often forming a reservoir, or stored body of water. A multi-purpose project combines several uses of stored water instead of serving a single purpose.

Case study: What does Bhakra Nangal provide?

The Bhakra Nangal project lies in the Sutluj-Beas river basin. Its water is used for both hydroelectricity and irrigation, the artificial supply of water to crops. It connects an energy benefit with agricultural water supply through the management of a river system.

The two benefits should be explained separately. Hydel generation uses moving water to produce electrical power. Irrigation supplies water to agricultural fields. Calling the scheme multi-purpose identifies this combination; describing it simply as an electricity project leaves out its agricultural role.

Case study: What does Hirakud provide?

The Hirakud project in the Mahanadi basin combines water conservation with flood control. Storing and regulating water connects management of the river’s flow with conserving the resource. Hirakud is also included among the important hydel projects.

Flood control is a project benefit, not a promise that flooding cannot occur. Large dams alter river flow and sediment movement. Sediment is material carried by water; its accumulation in reservoirs can create problems for storage and river environments.

How should the benefits and disadvantages be balanced?

Multi-purpose dams can support electricity generation, irrigation, domestic and industrial water supply, flood control, navigation and fish breeding. Those general uses should not all be assigned automatically to every named project. Connect each case with its established benefits.

Dams can interrupt the movement of aquatic animals and submerge vegetation and soil. Large projects can also displace people and damage livelihoods. Hydroelectricity uses renewable water, but this does not mean that constructing reservoirs has no environmental or social consequences.

What are the advantages and limitations of solar and wind energy?

Solar energy uses energy received from the Sun. Photovoltaic technology converts sunlight directly into electricity through solar cells. Solar thermal technology uses the Sun’s heat, including in heaters, crop dryers and cookers. These are different ways of using the same energy source.

India’s tropical location gives enormous possibilities for solar energy. Gujarat and Rajasthan have particularly strong development potential. Solar energy is becoming popular in rural and remote areas, where solar cells can be installed to supply electricity.

Why use solar cells, and what limits them?

Solar cells have no moving parts and require little maintenance. They can serve remote locations. Greater solar use can reduce dependence on firewood and dung cakes, helping conserve vegetation and retaining dung for use as manure in agriculture.

The availability of sunshine limits solar energy. Collection depends on daylight and sunny conditions, while substantial installations can be costly. A renewable source is therefore not necessarily available at the same intensity throughout the day or under all weather conditions.

How does wind generate electricity?

Wind energy uses the kinetic energy, or energy of movement, of air. Wind turns blades, and this rotation is used to generate electricity. Wind farms group installations that harness this resource. Electricity production depends on wind speed.

The largest wind farm cluster extends from Nagarcoil to Madurai in Tamil Nadu. Important wind farms also occur in Andhra Pradesh, Karnataka, Gujarat, Kerala, Maharashtra and Lakshadweep. Nagarcoil and Jaisalmer are well known for effective use of wind energy.

Wind is an inexhaustible energy source, and generation does not require burning fossil fuel. However, wind can be erratic, so energy cannot be harnessed continuously. Wind farms also require large areas. Suitable location is therefore essential to both resource availability and land requirements.

How can tides and underground heat generate electricity?

Tidal energy uses the movement of water associated with the rise and fall of ocean tides. A floodgate dam across a coastal inlet allows water to be trapped and later released through a turbine. The changing sea level provides the opportunity for generation.

What is the sequence in tidal generation?

1. Build a floodgate dam across an inlet, a sheltered opening of the coast into which seawater can flow.
2. Allow water to enter the inlet during high tide, when the sea level is higher.
3. Close the gate to retain water as the tide outside the inlet falls.
4. Release the retained water towards the sea through a pipe containing a power-generating turbine.

The Gulf of Khambhat, Gulf of Kutch and the Gangetic delta in the Sundarban region provide ideal conditions for tidal energy. These are suitable areas, which does not by itself establish that commercial tidal power stations operate there.

Tides provide renewable energy without consuming coal or petroleum. The mechanism also explains its limitations: suitable coastal inlets are needed, and generation depends on the tidal cycle. Inland areas cannot use this inlet-and-floodgate arrangement.

How does geothermal generation differ?

Geothermal energy uses heat from inside the Earth. The Earth grows progressively hotter with depth. The geothermal gradient describes the increase in temperature with depth. Where it is high, high temperatures occur at relatively shallow depths.

Groundwater absorbs heat from hot rocks. In suitable areas, it becomes hot enough to turn into steam on reaching the surface. The steam drives turbines to generate electricity. Unlike tidal generation, the immediate energy source here is underground heat.

Experimental projects have been set up in the Parvati valley near Manikaran in Himachal Pradesh and the Puga Valley in Ladakh. Geothermal energy offers an alternative to fossil fuels, but suitable underground heat conditions limit where this method can be used.

What can nuclear energy and biogas contribute?

Nuclear energy, also called atomic energy, is released when atomic structure changes. In nuclear fission, a heavy atomic nucleus, the central part of an atom, is split. Heat released through the process is used to generate electricity.

Uranium and thorium are important nuclear energy minerals. They occur in Jharkhand and the Aravalli ranges of Rajasthan. Kerala’s monazite sands are rich in thorium. Monazite is a mineral that contains thorium; a mineral deposit is distinct from a power station.

Which nuclear power centres are important?

Nuclear reactions release much energy as heat, providing another means of electricity generation. However, the raw materials are exhaustible. Safe disposal of spent fuel, used nuclear fuel requiring safe management, is a major difficulty. Non-conventional therefore does not automatically mean renewable or free of waste problems.

How is biogas produced and used?

Biogas is a fuel gas produced by the decomposition of organic matter. Its main constituent is methane, a combustible gas. Biomass means plant and animal material used as an energy resource; farm wastes and animal wastes provide material for biogas production.

Decomposition in the absence of oxygen produces the gas. Plants using cattle dung are called gobar gas plants. They can operate at individual, cooperative or municipal levels. Biogas supplies domestic energy, especially in rural areas, while the remaining material improves manure quality.

Biogas has higher thermal efficiency than kerosene, dung cake and charcoal, meaning it makes more effective use of fuel energy for heating. It is by far the most efficient use of cattle dung. It also reduces losses of trees and manure caused by burning wood and dung cakes.

A practical limitation follows from the production process: a plant needs an available supply of organic material for decomposition. Biogas cannot be assessed separately from that local input. The energy benefit and the manure benefit should both be included when explaining its value.

Why must mineral and energy resources be conserved?

Conservation means careful, planned use that protects resources for the future. Mineral formation takes millions of years, while consumption can be rapid. Replenishment is extremely slow compared with present consumption, so economically useful deposits are finite and non-renewable.

Continued extraction can increase costs because mining reaches greater depths while ore quality declines. Conservation therefore concerns both the amount remaining and the difficulty of obtaining it. Improved technology can help use lower-grade ores at lower costs.

What harms can mining cause?

Dust and harmful fumes make miners vulnerable to lung diseases. Collapsing roofs, flooding and fires in coal mines threaten their safety. Waste and slurry, a mixture of fine solids and liquid, can damage land and increase pollution of rivers and streams.

Mining can contaminate local water sources. Safety regulations and environmental laws therefore need effective implementation. Mineral benefits do not remove the need to protect people and landscapes in the places where extraction occurs.

Which actions conserve resources?

Recycling metals returns used metal to production. Using scrap, substituting other materials where suitable, and improving the use of low-grade ores reduce pressure on mineral resources. Planned use is essential because deposits cannot be replenished immediately when demand rises.

Energy conservation includes using public transport, switching off electricity when it is not needed and adopting power-saving devices. Increased use of renewable sources complements these measures. Conserving energy and expanding renewable supply are the two connected approaches to sustainable energy development.

Sustainable development combines economic development with environmental protection and the needs of future generations. Resource choices should connect availability, useful output and consequences. Neither abundant reserves nor a renewable source removes the need for careful management.

Glossary

• Mineral — A naturally occurring substance with uniform composition and a definable internal structure.
• Ore — A mineral accumulation whose useful content is concentrated enough for commercially worthwhile extraction.
• Vein — A smaller mineral occurrence within cracks or joints of rock formations.
• Bauxite — A clay-like ore processed to obtain alumina and subsequently the metal aluminium.
• Malleability — The property that allows a material to be shaped into thin sheets.
• Ductility — The property that allows a material to be drawn into wires.
• Fossil fuel — Fuel formed from buried organic remains transformed over long geological periods.
• Anticline — An upward fold in rock layers whose crest may trap petroleum.
• Hydroelectricity — Electricity generated by using moving water to drive turbines connected to generating equipment.
• Photovoltaic technology — Technology that converts energy received as sunlight directly into electrical energy.
• Geothermal energy — Heat and electricity obtained by using heat from the Earth’s interior.
• Nuclear fission — Splitting a heavy atomic nucleus to release energy used for generating power.
• Biogas — Fuel gas produced when organic wastes decompose in the absence of oxygen.
• Conservation — Planned, careful resource use that protects supplies and environmental conditions for the future.

Common errors and misconceptions

• Misconception: Magnetite always contains exactly 70 per cent iron. Correct: Its iron content is up to 70 per cent; the upper limit is not a fixed value for every deposit.
• Misconception: Bauxite and aluminium are interchangeable names. Correct: Bauxite is an ore. Alumina and then aluminium are obtained through processing it.
• Misconception: Production percentages describe mineral reserves. Correct: They describe extraction in a stated period. The manganese and bauxite tables refer specifically to 2018 to 2019.
• Misconception: Gas must occur above oil in every deposit. Correct: Gas, being lighter, usually occurs above oil. Retain that qualification.
• Misconception: Renewable hydel power has no environmental disadvantages. Correct: Dams can alter river flow, trap sediment, interrupt animal movement and submerge vegetation.
• Misconception: Every non-conventional source is renewable. Correct: Nuclear energy uses exhaustible raw materials and creates difficulties involving safe spent-fuel disposal.
• Misconception: A suitable tidal-energy location proves that a power station operates there. Correct: Geographical potential and an operating generating station are different claims.
• Misconception: Biogas and burning dung cakes provide identical benefits. Correct: Biogas supplies energy while improving manure quality and reducing losses associated with burning dung cakes.

Exam-style questions with model answers

Q1. Magnetite has iron content up to 70 per cent and excellent magnetic qualities valuable to the electrical industry. Explain two reasons for its importance. [2 marks]

1. Its iron content can reach 70 per cent, making it a high-quality iron ore.
2. Its excellent magnetic qualities make it especially useful in the electrical industry.

Q2. Copper conducts electricity well, can be shaped into sheets and drawn into wires, and is used in cables and electronics. Explain three connections between its properties and these uses. [3 marks]

1. Good electrical conductivity allows copper to carry electricity, explaining its use in electrical cables and equipment in the electronics industry.
2. Ductility means that copper can be drawn into wires, connecting its physical property directly with the form required for cables.
3. Malleability means that copper can be shaped into sheets, making it useful where electrical or electronic manufacture requires shaped metal components.

Q3. Manganese production shares in 2018 to 2019 were Madhya Pradesh 33 per cent, Maharashtra 27 per cent, Odisha 16 per cent, Karnataka 12 per cent, Andhra Pradesh 10 per cent and others 2 per cent. Identify the largest producer, calculate the combined share of the two largest, and explain why these data do not establish current rankings or reserve shares. [4 marks]

1. Madhya Pradesh was the largest producer in the given year because its 33 per cent share exceeds every other listed share.
2. The two largest shares were Madhya Pradesh and Maharashtra. Adding 33 and 27 gives a combined share of 60 per cent.
3. The figures describe 2018 to 2019. They cannot establish present-day rankings because no current production data have been supplied.
4. The table measures production, meaning extraction during that period. It does not measure the mineral reserves remaining available underground.

Q4. Bhakra Nangal in the Sutluj-Beas basin supplies hydel power, electricity generated using moving water, and irrigation, water supplied to agricultural fields. Hirakud in the Mahanadi basin combines water conservation with flood control. Dams can also interrupt aquatic animal movement. Using these facts, explain five features of the projects and their assessment. [5 marks]

1. Bhakra Nangal provides hydel power, so one of its benefits is the generation of electricity using the water resource.
2. It also supplies irrigation water in the Sutluj-Beas basin, linking the management of water with the needs of agricultural fields.
3. Hirakud conserves water in the Mahanadi basin, making the storage and management of the resource an important benefit of the project.
4. Hirakud also provides flood control, showing that a river project may combine management of water supplies with regulation of river flow.
5. The benefits must be weighed against environmental effects: dams can interrupt aquatic animal movement, so useful water management does not imply an absence of ecological costs.

Q5. A tidal plant admits water into an inlet at high tide, retains it behind closed floodgates as the sea level falls, and later releases it through a pipe containing a power-generating turbine. Explain this process in four ordered points. [4 marks]

1. At high tide, seawater enters the coastal inlet through the open floodgates, supplying the water that the plant will subsequently retain.
2. The gates close after water enters, trapping it inside the inlet instead of allowing it to flow straight back out.
3. The tide falls outside the floodgates, while the enclosed water remains retained behind them until it is released.
4. The retained water flows back towards the sea through the pipe and its turbine, allowing the movement of water to generate electricity.

Q6. Solar cells convert sunlight directly into electricity, have no moving parts, need little maintenance and can serve remote areas. Solar collection depends on daylight and sunny conditions; installations can be costly. Wind is erratic and wind farms need large areas. State three solar advantages, two solar limitations and one wind limitation. [6 marks]

1. Solar cells have no moving parts. This is a useful feature of the equipment used to convert sunlight directly into electrical energy.
2. They require little maintenance, so keeping the generating equipment in use involves a limited maintenance requirement.
3. They can serve remote areas, making solar electricity useful in places located away from other sources of supply.
4. Solar collection depends on daylight and sunny conditions. The available energy therefore varies with the presence and strength of sunshine.
5. Solar installations can be costly, meaning that the availability of sunlight does not remove the expense of installing equipment.
6. Wind is erratic, so wind energy cannot be harnessed continuously. This limits dependable generation from the wind resource.

Q7. Nuclear energy uses exhaustible raw materials and presents a major problem of safe spent-fuel disposal. Give two reasons why calling it non-conventional does not mean that it is an unlimited, problem-free source. [2 marks]

1. Its raw materials are exhaustible, so the fuel supply is not unlimited.
2. Spent fuel requires safe disposal, creating a major waste-management difficulty.

Q8. Minerals take millions of years to form and are consumed much faster than they are replenished; deeper extraction and declining ore quality increase costs. Recycling returns used metal to production; scrap use makes discarded metal useful again; suitable substitutes replace scarce minerals in some uses. These methods reduce pressure on mineral deposits. Using this information, explain five reasons or methods for conservation. [5 marks]

1. Minerals require millions of years to form, so resources consumed now cannot be replaced quickly enough to match their use.
2. Extraction becomes more expensive as mining reaches deeper deposits and encounters declining ore quality, increasing the importance of careful use.
3. Recycling returns metal from used materials to production, helping conserve mineral resources that would otherwise need to be supplied through extraction.
4. Using scrap metal makes discarded metal useful again, allowing existing material to contribute to production and reducing pressure on mineral deposits.
5. Suitable substitutes can replace scarce mineral materials in some uses, helping preserve the available mineral supply for uses that still require it.

Key takeaways

• Mineral occurrence reflects geological conditions, while concentration, extraction difficulty and market distance affect whether a deposit becomes a mine.
• Connect iron ore, manganese, copper and bauxite with their properties, industrial uses, producing states and prominent mining areas.
• Keep production percentages attached to their stated year, and distinguish production from reserves and ore composition.
• Coal, petroleum and natural gas have diverse uses, but their exhaustibility and environmental consequences require careful management.
• Bhakra Nangal combines hydel power and irrigation; Hirakud combines water conservation and flood control in the Mahanadi basin.
• Solar and wind energy offer renewable supplies, while sunshine, wind variability, costs and land requirements influence their use.
• Tidal and geothermal energy require suitable geographical conditions; nuclear energy raises concerns about exhaustible fuel and spent-fuel disposal.
• Biogas provides energy and improved manure, while recycling metals and conserving electricity help protect resources for future use.

Test yourself

What makes an ore commercially useful?

Its useful mineral content must be sufficiently concentrated to make extraction commercially worthwhile.

Which two iron ore areas can be paired with Odisha and Chhattisgarh?

Badampahar is in Odisha, while Bailadila is an important iron ore area in Chhattisgarh.

Which copper locations belong to Madhya Pradesh and Rajasthan?

Balaghat is an important copper-producing area in Madhya Pradesh; Khetri is in Rajasthan.

Why is “up to” necessary when describing magnetite’s iron content?

Its iron content can reach 70 per cent; that value is not fixed for every deposit.

Which coal variety is associated with Neyveli?

Neyveli in Tamil Nadu has principal lignite reserves used for electricity generation.

How do photovoltaic and solar thermal technologies differ?

Photovoltaic technology converts sunlight directly into electricity, while solar thermal technology uses the Sun’s heat.

Where are the two experimental geothermal project locations?

They are the Parvati valley near Manikaran in Himachal Pradesh and the Puga Valley in Ladakh.

What two benefits do gobar gas plants provide?

They provide fuel energy and improve manure quality, reducing losses associated with burning dung cakes.