Mineral Resources of India: Distribution and Conservation

1. Minerals, ores and their classification

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• Mineral: a natural substance of organic or inorganic origin with definite chemical and physical properties (Class 12). Geologists call it "a homogenous, naturally occurring substance with a definable internal structure" (Class 10). More than 2,000 are known, but only a few are common. Most of India's valuable minerals are pre-Palaeozoic and lie in the peninsular igneous and metamorphic rocks.
• Ore: a mineral mixed with other elements, in a concentration high enough to make mining pay. How the ore formed decides how easy and how costly it is to mine.
• Classification of minerals (Class 12, Fig. 5.1):

Class	Type	Examples
Metallic	Ferrous	iron ore, manganese, chromite, nickel, cobalt
Metallic	Non-ferrous	copper, bauxite, lead, zinc, tin
Metallic	Precious	gold, silver, platinum
Non-metallic	Organic (mineral fuels)	coal, petroleum
Non-metallic	Inorganic	mica, limestone, graphite, gypsum

• Ferrous minerals contain iron or are used to make iron and steel. They make up about three-fourths of the value of metallic mineral output. India exports them once home needs are met.
• Non-ferrous minerals have no iron. India has few of them, bauxite apart.
• Non-metallic minerals yield no metal. Mica is the most important of these in India.
• Characteristics of minerals: they are spread unevenly; quality and quantity are inversely related (high-grade ore is scarce); and they run out over time, with "no second crop". Workable deposits make up only about 1% of the earth's crust.
• Beyond NCERT: the MMDR Act 1957 divides minerals into major minerals (run by the Centre) and minor minerals (run by the states; sand, building stone).

2. Mode of occurrence: how mineral deposits form

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• Veins and lodes: molten or gaseous minerals are pushed up through cracks, faults and joints in igneous and metamorphic rocks, then cool and harden. Small ones are veins and large ones are lodes. They give tin, copper, zinc and lead (Khetri copper; Aravalli lead-zinc).
• Bedded mineral deposits: minerals laid down and concentrated in flat layers (strata) of sedimentary rock.
• Coal and some iron ores form under long heat and pressure.

• Evaporites (gypsum, potash salt, sodium salt) form when water evaporates in dry regions, e.g. gypsum in Rajasthan and salt in Gujarat.

• Residual mineral deposits: surface rock weathers → the soluble parts wash away → the ore left behind becomes richer. Bauxite and some iron and manganese ores form this way, under the laterite caps of the Odisha and Amarkantak plateaus.

• Placer deposits: heavy minerals that water does not corrode (gold, silver, tin, platinum, diamonds) collect in valley sands and on beaches. Rich gold placers on the Ghana coast come from source veins in Brazil, and Wegener used this as evidence for continental drift (Class 11).
• Ocean mineral resources: common salt, magnesium and bromine come from seawater. Ocean beds are rich in manganese (polymetallic) nodules.
• The depth and shape of a deposit decide whether it is worked as an open-pit mine, a quarry or an underground shaft mine.

3. Distribution of minerals and the mineral belts

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• Distribution of minerals in India is uneven because geological structure, processes and time differ from place to place.
• Peninsular rocks hold most of the coal (over 97% of it in the Damodar, Sone, Mahanadi and Godavari valleys), the metallic minerals and mica.
• The sedimentary flanks of Gujarat and Assam hold petroleum. Rajasthan holds non-ferrous minerals.

• The northern alluvial plains have almost no economic minerals.

• Mangaluru-Kanpur line: an imaginary line from Mangaluru to Kanpur. Most major minerals lie east of it.

• Mineral belts of India: three main belts plus the Himalayan belt.
• North-Eastern Plateau mineral belt: Chhotanagpur (Jharkhand), the Odisha plateau, West Bengal and parts of Chhattisgarh. It is the "storehouse of minerals": iron ore, coal, manganese, bauxite, mica, copper and uranium. Iron ore lies near coking coal, so steel plants grew at Jamshedpur, Bokaro, Durgapur, Rourkela and Bhilai.
• South-Western Plateau mineral belt: Karnataka, Goa, the Tamil Nadu uplands and Kerala. It has high-grade iron ore, manganese, bauxite and limestone. Its only coal is Neyveli lignite. Kerala has monazite and Goa has iron ore.
• North-Western mineral belt: the Aravallis of Rajasthan and part of Gujarat, in Dharwar rocks. It gives copper, zinc, sandstone, granite, marble, gypsum, Fuller's earth, and limestone and dolomite for cement. Both states produce salt.

• Himalayan belt: copper, lead, zinc, cobalt and tungsten; Assam valley oil.

• A deposit becomes a mine only when its grade, ease of extraction and nearness to market make it pay.

4. Iron ore: types, belts and contested mines

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• Iron ore is "the backbone of industrial development". India has Asia's largest reserves. About 95% of them are in Odisha, Jharkhand, Chhattisgarh, Karnataka, Goa, Telangana, Andhra Pradesh and Tamil Nadu. In 2018-19, 97% of output came from Odisha, Chhattisgarh, Karnataka and Jharkhand. Odisha now produces over half (verify current).
• Magnetite: the finest ore, with up to 70% iron. It is magnetic, which makes it useful in the electrical industry. Found in Karnataka (Kudremukh), Andhra Pradesh and Tamil Nadu.
• Haematite: a reddish iron oxide and the most-used industrial ore, with 50-60% iron (NCERT). It is the main ore in Indian steel plants.

• Iron ore belts of India: 1. Odisha-Jharkhand: Gurumahisani, Sulaipet and Badampahar (Mayurbhanj), Kiriburu (Kendujhar), Bonai (Sundergarh); Noamundi and Gua (Singhbhum). 2. Durg-Bastar-Chandrapur: Dalli-Rajhara (Durg), which feeds Bhilai. 3. Ballari-Chitradurga-Chikkamagaluru-Tumakuru: Sandur-Hospet, Baba Budan hills, Kudremukh. 4. Maharashtra-Goa: Goa and Ratnagiri, with lower-grade ore exported through Marmagao.

• Bailadila range ("ox's hump") in Dantewada, Chhattisgarh: 14 deposits of super high-grade haematite. NMDC mines it and exports the ore to Japan and South Korea through Visakhapatnam.

• Kudremukh ("horse face") in Chikkamagaluru, in the Western Ghats: a 100% export unit that sent ore as slurry by pipeline to a port near Mangaluru. Mining ended at the close of 2005 under a Supreme Court order to protect Kudremukh National Park.
• Beyond NCERT: illegal-mining crackdowns in Ballari (2011) and Goa (leases quashed in 2018).

5. Manganese and chromite

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• Manganese is used to smelt iron ore and to make ferro-manganese alloys. It takes about 10 kg to make one tonne of steel. It also goes into bleaching powder, insecticides, paints and dry-cell batteries. It occurs mainly in the Dharwar rocks.
• Main producers:
• Madhya Pradesh (leading): the Balaghat-Chhindwara-Nimar-Mandla-Jhabua belt.
• Odisha (leading): Bonai, Kendujhar, Sundergarh, Gangpur, Koraput, Kalahandi and Bolangir, in the central part of the iron ore belt.
• Karnataka: Dharwar, Ballari, Belagavi, North Canara, Shivamogga, Tumakuru.
• Maharashtra: Nagpur, Bhandara, Ratnagiri.

• Minor producers: Telangana, Goa, Jharkhand.

• Drawback (Class 12): the mines in Madhya Pradesh and Maharashtra are far from steel plants. MOIL (Nagpur) is the main public-sector producer.

• Chromite (beyond NCERT) is a ferrous mineral and the only commercial ore of chromium. It is used for stainless steel, ferrochrome and refractories (heat-resistant linings).
• Odisha holds almost all of India's reserves, mostly in the Sukinda valley of Jajpur district.
• Its open-cast mines have polluted water with toxic hexavalent chromium, and Sukinda has been listed among the world's most polluted places.

6. Non-ferrous minerals: bauxite, copper, lead-zinc and gold

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• Bauxite is a clay-like ore → alumina → aluminium, a light, strong and conductive metal. It formed in Tertiary times as residual deposits with laterite on peninsular plateaus and in coastal tracts.
• Odisha leads: Kalahandi, Sambalpur, Bolangir and Koraput.

• Other deposits: the Lohardaga patlands (Jharkhand); Bhavnagar and Jamnagar (Gujarat); the Amarkantak plateau, Maikal hills and Katni-Jabalpur; Kolaba to Kolhapur (Maharashtra).

• Panchpatmali (Koraput) is Odisha's most important bauxite deposit. It feeds NALCO's refinery at Damanjodi and its smelter at Angul.

• Niyamgiri bauxite case: Vedanta planned to mine bauxite in the Niyamgiri hills, which the Dongria Kondh hold sacred. In 2013 the Supreme Court left the decision to the local gram sabhas under the Forest Rights Act, and all twelve said no.
• Copper is malleable, ductile and a good conductor, so it is used for wires, motors and transformers. India is critically short of it.
• Main deposits: Singhbhum (Jharkhand), Balaghat (Malanjkhand, MP), and Jhunjhunu-Khetri and Alwar (Rajasthan).
• Minor deposits: Agnigundala (Guntur, AP), Chitradurga and Hassan (Karnataka), South Arcot (TN).

• India imports concentrate, so recycling scrap matters.

• Rampura Agucha mine (Bhilwara, Rajasthan) is one of the world's largest zinc mines. Along with Zawar, Sindesar Khurd and Rajpura-Dariba (all Hindustan Zinc), it makes Rajasthan almost India's only lead-zinc source.

• Hutti gold mine (Raichur, Karnataka) is India's main primary gold mine. The Kolar Gold Fields (mined from 1880) closed in 2001.

7. Non-metallic and rock minerals: mica, limestone and sand

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• Mica is made of thin plates that split into tough, flexible sheets; a thousand sheets stack to only a few cm. It insulates well and resists high voltage, which makes it essential in the electrical and electronics industries.
• Jharkhand: a belt about 150 km long and 22 km wide in the lower Hazaribagh plateau. The Koderma-Gaya-Hazaribagh belt is the leading producer.
• Andhra Pradesh: Nellore gives the best-quality mica.
• Rajasthan: a belt of about 320 km from Jaipur to Bhilwara and around Udaipur (Class 10 says around Ajmer).

• Also in Telangana, TN, West Bengal (Purulia, Bankura), Karnataka (Mysuru, Hassan) and Kerala (Alappuzha).

• Limestone is a sedimentary rock of calcium carbonate (or calcium-magnesium carbonate, i.e. dolomite).

• It is the basic raw material for cement and a flux (a substance that removes impurities) in the blast furnace.

• Main producers: Rajasthan, MP, AP, Karnataka and Chhattisgarh (2018-19; verify current). This explains the cement clusters at Chittorgarh, Satna, Katni and Kadapa.

• Sand mining (beyond NCERT): sand is a minor mineral, so the states regulate it.

• Too much mining lowers riverbeds and water tables, erodes banks, weakens bridges and harms wildlife.
• The Sustainable Sand Mining Management Guidelines 2016 require district survey reports and environmental clearance. Enforcement guidelines followed in 2020.
• Alternatives: manufactured sand (M-sand) from crushed rock.

8. Atomic and beach-sand minerals, and rare earths

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• Uranium (Class 12) occurs in Dharwar rocks:
• along the Singhbhum copper belt

• in Udaipur, Alwar and Jhunjhunu (Rajasthan), Durg (Chhattisgarh), Bhandara (Maharashtra) and Kullu (HP).

• Jaduguda uranium mine (East Singhbhum, Jharkhand) was India's first uranium mine, opened in 1967 by the Uranium Corporation of India. Tummalapalle (Kadapa, AP) holds one of the world's larger low-grade uranium deposits.

• Monazite is a phosphate mineral and the main source of thorium and rare earths. NCERT puts the world's richest deposits in Palakkad and Kollam (Kerala), near Visakhapatnam (AP) and in the Mahanadi delta (Odisha). The Kerala beach belt is really the Kollam-Alappuzha (Chavara) coast; Palakkad is inland, so NCERT's mention needs checking. Thorium feeds India's three-stage nuclear programme.
• Beach-sand minerals are heavy minerals concentrated by waves on the coasts of Kerala, TN (Manavalakurichi), Odisha (Chhatrapur) and AP: ilmenite, rutile, zircon, garnet, sillimanite and monazite. Since 2019, mining monazite-bearing sands has been reserved for government bodies, mainly IREL.
• Rare earth elements are 17 metals: the 15 lanthanides plus scandium and yttrium. They go into magnets for EVs, wind turbines and defence. India has about 6% of world reserves but little processing (verify current). China dominates refining and magnet-making.
• Rare earth permanent magnet scheme: approved in November 2025 with about ₹7,280 crore to build integrated sintered-magnet plants in India, after China curbed magnet exports in 2025 (verify current).

9. Hazards of mining and mining communities

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• Hazards of mining (Class 10):
• Miners' health: breathing dust and toxic fumes causes lung diseases (silicosis, pneumoconiosis). Roofs can collapse, and coal mines can flood or catch fire.

• Environment: water sources are contaminated, and dumped waste and slurry degrade land and pollute rivers.

• Class 10's Jharia examples: underground coal fires burning since about 1916 forced plans to relocate the whole town. BCCL admitted that half its mines were unsafe after a disaster killed 54 people. The Supreme Court made SECL pay compensation for using forest land in Chhattisgarh.

• Rat-hole mining: families dig coal through long, narrow tunnels just wide enough for one person, in Meghalaya's Jaintia Hills (Jowai) and Cherrapunji. Minerals there belong to individuals or communities, not the state. The NGT banned it in 2014 as illegal and unsafe.

• Beyond NCERT: the Ksan mine disaster (December 2018); a 2019 Supreme Court ruling that allows scientific mining under leases; acid drainage in the Kopili and Lukha rivers.

• District Mineral Foundation (beyond NCERT): a trust in every mining district, set up by the MMDR Amendment Act 2015.

• Miners pay 30% of royalty (leases from before 2015) or 10% (auctioned leases) into it.
• The money is spent on affected people under the PM Khanij Kshetra Kalyan Yojana (2015; revised 2024).

• Criticism: funds sit unspent or go to projects far from the mines (verify current).

• Related safeguards: PESA consent, the Forest Rights Act and the Samatha judgment (1997).

10. Conservation of minerals and mineral governance

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• Conservation of mineral resources is needed because minerals are finite and form far more slowly than we use them. Mining also gets costlier as it goes deeper and grades fall.
• Plan for sustainable use.
• Use technology that makes low-grade ores usable (beneficiation, pelletisation).
• Recycle scrap metal, especially copper, lead and zinc, where India's reserves are meagre.
• Use substitutes for scarce metals.
• Shift from exhaustible fuels to renewable energy.

• Export fewer strategic and scarce minerals (Class 12).

• Beyond NCERT: National Mineral Policy 2019; Steel Scrap Recycling Policy 2019; urban mining of e-waste.

• Mineral exploration stages (UN Framework Classification): reconnaissance (G4) → preliminary (G3) → general (G2) → detailed exploration (G1). Each stage gives more confidence about a deposit's size and grade.

• GSI (1851) explores, IBM (1948) regulates, and the National Mineral Exploration Trust (2015) funds exploration.

• MMDR Act 1957 amendments:

• 2015: auctions for leases, the DMF and the NMET.
• 2021: ended the difference between captive and merchant mines.

• MMDR Amendment Act 2023: took six minerals, including lithium, off the atomic minerals list; let the Centre auction 24 critical and strategic minerals; and created exploration licences for deep-seated minerals.

• Minor minerals stay with the states.

11. Critical minerals and mineral security

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• Critical minerals are vital for the economy, clean energy and defence, but their supply is at risk. In June 2023 the Ministry of Mines listed 30, including lithium, cobalt, nickel, graphite, rare earths, tin, tungsten, germanium, gallium, titanium, vanadium, phosphorus and potash (verify current). India imports most of them, and much of the processing happens in China. Demand comes from EV batteries, solar and wind.
• Reasi lithium deposit: in February 2023 GSI reported 5.9 million tonnes of inferred lithium resources (G3 stage) at Salal-Haimana, Reasi district, Jammu and Kashmir. Early auctions found no successful bidder because the grade was uncertain (verify current).
• National Critical Mineral Mission (approved January 2025): ₹16,300 crore of central money plus about ₹18,000 crore from PSUs (verify current). It covers:
• exploration, including offshore
• auctions and processing parks
• recycling and a national stockpile

• buying mineral assets abroad.

• Khanij Bidesh India Limited (KABIL): a 2019 joint venture of NALCO, Hindustan Copper and MECL that buys critical-mineral assets abroad. In January 2024 it signed for five lithium blocks in Catamarca, Argentina, part of the "lithium triangle".

• Mineral Security Partnership: a US-led group of about 14 countries and the EU, which India joined in June 2023. It aims for varied, responsible supply chains so that no single supplier dominates.
• Other links: the Quad critical minerals initiative and deals with Australia, Chile and Zambia (verify current).

12. Ocean minerals: polymetallic nodules, the Deep Ocean Mission and offshore blocks

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• Polymetallic nodules are potato-sized lumps on the deep ocean floor, rich in manganese, nickel, copper and cobalt.
• India was the first country given pioneer investor status (1987).
• It has held an International Seabed Authority (ISA) exploration contract over 75,000 sq km in the Central Indian Ocean Basin since 2002.
• Since 2016 it also holds a polymetallic sulphides contract on the Central and South-West Indian Ridges.

• In 2024 it applied to explore cobalt-rich crusts on the Afanasy-Nikitin seamount (verify current).

• The ISA's mining code is still unsettled. Many countries want a pause on deep-sea mining because of its ecological risks.

• Deep Ocean Mission (approved June 2021, about ₹4,077 crore, Ministry of Earth Sciences) aims to:
• build deep-sea mining technology
• build Matsya-6000 (under Samudrayaan), a submersible to carry three people to 6,000 m
• explore deep-sea biodiversity and hydrothermal minerals, and offer ocean climate services.

• NIOT leads the technology; trials are ongoing (verify current).

• Offshore mineral blocks auction: the Offshore Areas Mineral (Development and Regulation) Amendment Act 2023 allowed auctions in India's territorial waters, continental shelf and EEZ. The first tranche of 13 blocks (November 2024) covered:

• construction sand off Kerala (Kollam)
• lime mud off Gujarat

• polymetallic nodules and crusts off the Andaman and Nicobar Islands.

• Kerala's fishers protested over threats to their livelihood and the sea (verify current).

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Exam angles

Prelims — high-yield facts and traps

• Mode of occurrence → minerals: veins and lodes → tin, copper, zinc, lead; beds → coal, gypsum, potash; residual → bauxite; placer → gold, tin, platinum; ocean water → salt, magnesium, bromine.
• Most minerals lie east of the Mangaluru-Kanpur line. Neyveli lignite is the south-western belt's only coal. The Aravalli belt gives copper, zinc, marble and gypsum.
• Iron ore mines → districts: Badampahar and Gurumahisani (Mayurbhanj); Kiriburu (Kendujhar); Noamundi and Gua (Singhbhum); Dalli-Rajhara (Durg); Bailadila (Dantewada, exports via Visakhapatnam); Kudremukh (Chikkamagaluru, closed 2005); Goa (exports via Marmagao).
• Magnetite has up to 70% iron; haematite has 50-60% (NCERT). "Haematite is the finest ore" is FALSE: magnetite is.
• Bauxite: Odisha first; Panchpatmali (Koraput); Lohardaga patlands; Amarkantak. Copper: Khetri, Malanjkhand, Singhbhum. Zinc: Rampura Agucha (Bhilwara). Gold: Hutti (Raichur). Chromite: Sukinda (Jajpur).
• Mica: Koderma-Gaya-Hazaribagh leads; Nellore has the best quality; Jaipur-Bhilwara belt. Monazite gives thorium, not uranium. Jaduguda (1967) was the first uranium mine.
• The NGT banned rat-hole mining in 2014. The DMF came from the 2015 amendment. MMDR 2023 removed lithium from the atomic list.
• 30 critical minerals (2023); Reasi lithium 5.9 Mt at G3 (inferred, not proven); NCMM (2025); KABIL in Argentina; India in the MSP (2023); ISA contract over 75,000 sq km in the CIOB; Matsya-6000 dives to 6,000 m.
• "The northern plains are rich in minerals": FALSE. "India is rich in copper": FALSE.

Mains — GS-I and GS-III themes

1. Geological reasons why minerals cluster in peninsular India, and what this means for the location of heavy industry (iron ore and coal together in Chhotanagpur).
2. Chota Nagpur is the "storehouse of minerals" yet among India's poorest regions. Discuss the resource curse and the policy responses (DMF and PMKKKY, PESA, FRA).
3. India is rich in iron ore and bauxite but short of copper, lead-zinc and critical minerals. Discuss a strategy for mineral security (NCMM, KABIL, MSP, recycling).
4. Environmental and social costs of mining: Sukinda, Jharia, Meghalaya rat-hole mining, sand mining. Suggest a framework for sustainable mining.
5. Community consent in mining: lessons from Niyamgiri.
6. Deep-sea mining: India's opportunity and the ecological risks.

Current-affairs hooks

• Critical-mineral block auctions and the bidder response; lithium exploration updates.
• China's rare-earth export curbs and India's magnet and processing schemes.
• MSP, Quad and bilateral critical-mineral deals; KABIL acquisitions abroad.
• Offshore block auctions and coastal protests; ISA mining-code talks.
• Action on illegal mining and sand mining; audits of DMF spending.
• Jharia rehabilitation; mine accidents; regulation of coal mining in Meghalaya.