Minerals of India: Iron, Coal, Petroleum and Bauxite
Minerals are the natural wealth hidden in the earth, and they are the raw material of almost every industry. A country that has iron ore can make steel, coal can generate power, petroleum can run vehicles and machines, and bauxite can give aluminium for aircraft and utensils. India is rich in iron ore, coal, mica, limestone and bauxite, but it is short of petroleum and of some high-grade metals, which is why conservation and the search for new reserves matter so much. The names of the leading states, the great mineral fields and the records such as the highest grade or the oldest mine are all standard exam questions, and this chapter organises them clearly.
What is a mineral and the types of minerals
A mineral is a naturally occurring inorganic substance with a definite chemical composition. Minerals are divided into metallic and non-metallic types. Metallic minerals contain metal and include iron ore, bauxite, manganese, copper, gold and silver; they are further split into ferrous minerals, which contain iron such as iron ore and manganese, and non-ferrous minerals such as bauxite and copper. Non-metallic minerals do not contain metal and include mica, limestone, salt and gypsum. Minerals are also described as exhaustible, because the reserves that took millions of years to form can be used up within a few generations, which is why they must be mined carefully and used efficiently.
Iron ore: the backbone of industry
Iron ore is the foundation of the iron and steel industry, and iron and steel are themselves the foundation of every other industry. The largest producer of iron ore in India is Odisha, and the largest iron ore field is the Singhbhum field in the Jharkhand-Odisha belt. There are two main ores: magnetite, which is the highest grade of iron ore, and hematite, which is the most important iron ore of India and is widely mined for steel. The famous Bailadila iron ore field lies in the Bastar district of Chhattisgarh, and its high-grade ore is even exported. India's total reserve of iron ore is estimated at about 33 billion tonnes. Because iron ore is heavy and bulky, it is usually smelted near the mines, which is why the steel plants of Odisha, Jharkhand and Chhattisgarh grew up beside the ore fields.
Coal: the energy mineral
Coal is the most important source of commercial energy in India and is used mainly for generating electricity and for making steel. The largest producer of coal in India is Jharkhand, and the largest coal field is the Jharia field in Jharkhand. The oldest coal field of India is the Raniganj field in West Bengal, which was mined even in the early days of the British rule. The largest coal-producing company is Coal India Limited (CIL), which was established in 1975. In the production of coal India ranks second in the world, after China. Coal is graded by its carbon content, and the highest grade is anthracite, which burns with little smoke; coking coal is the special coal that can be converted into coke and is essential for the iron and steel industry. Because much of India's coal is of lower grade and lies in the east, moving it to the power plants of the west and the south is a major transport challenge.
Petroleum and natural gas
Petroleum, or mineral oil, is the fuel of transport and the raw material of the petrochemical industry. The largest producer of petroleum in India is Rajasthan, followed by Gujarat and Assam. The oldest oil field of India is Digboi in Assam, and the oldest oil refinery of India is also at Digboi, which is why Assam is called the birthplace of the Indian oil industry. The largest oil field of India by production is the offshore Mumbai High, discovered in 1974. India's crude oil production is about 30 million tonnes a year, which is far less than the country's growing demand, so India imports a very large quantity of crude oil. Natural gas, found along with petroleum, is used for fertiliser, power and as a clean fuel, and Assam is an important producer of natural gas as well as of oil.
Bauxite and other minerals
Bauxite is the ore of aluminium, a light metal used in aircraft, vehicles, packaging and electrical goods. Odisha has the largest reserve of bauxite in India, is the largest producer of bauxite and is also the largest producer of aluminium; the largest bauxite mine is the Panchpatmali mine in Odisha. Aluminium is made by refining bauxite into alumina and then smelting it with a great deal of electricity, which is why aluminium plants are usually built near cheap power. Manganese, another important mineral, is mined most in Odisha and is used in making steel and alloys. The largest producer of limestone, which is the raw material of cement, is Madhya Pradesh. The largest producer of gold is Karnataka, and the oldest gold mine of India is the Kolar gold field in Karnataka. Mica, valued for its use in the electrical and electronic industries for insulation, is produced most in Jharkhand, and the largest reserve of uranium, the nuclear fuel, is also in Jharkhand.
Conservation of minerals
Minerals are exhaustible, so their conservation is a duty of both the government and the people. Conservation means reducing waste in mining, recycling metals, using substitutes where possible, improving the recovery of minerals from low-grade ore and using renewable energy so that coal and oil last longer. Mining must also be done responsibly, with attention to the rehabilitation of mined land, the safety of workers and the protection of forests and rivers, because badly planned mining destroys the very land and water on which local communities depend.
Quick revision
For quick revision, remember that a mineral is a naturally occurring inorganic substance with a definite chemical composition, and that minerals are metallic or non-metallic. In iron ore, Odisha leads, the Singhbhum field is the largest, magnetite is the highest grade, hematite is the most important ore, Bailadila is in Chhattisgarh and the reserve is about 33 billion tonnes. In coal, Jharkhand leads, Jharia is the largest field, Raniganj is the oldest, Coal India Limited (established 1975) is the largest company, India is second in the world after China, anthracite is the highest grade and coking coal is needed for steel. In petroleum, Rajasthan leads, Digboi is the oldest field and the oldest refinery, Mumbai High (discovered 1974) is the largest by production and the crude output is about 30 million tonnes. In the other minerals, Odisha leads in bauxite, manganese and aluminium, Panchpatmali is the largest bauxite mine, Madhya Pradesh leads in limestone, Karnataka in gold with the Kolar field and Jharkhand in mica and uranium.
How to prepare this topic
- Learn each mineral as a group of facts - the leading state, the largest field or mine, the highest grade and the main use - so that any one part can be recalled from the others.
- Make a "state leader" chart: Odisha for iron ore, bauxite, manganese and aluminium, Jharkhand for coal, mica and uranium, Rajasthan for petroleum, Madhya Pradesh for limestone and Karnataka for gold.
- Keep the two iron ores apart: magnetite is the highest grade, while hematite is the most important ore of India.
- Join each petroleum fact to one place: Digboi for the oldest field and the oldest refinery, Mumbai High for the largest field by production and 1974 for its discovery, and Rajasthan for the largest production.
- Revise the idea of conservation as a balanced answer, covering recycling, substitutes, better mining and the use of renewable energy.
Common exam traps
- Magnetite is the highest grade of iron ore, but hematite is the most important iron ore of India; the two are not the same.
- Jharkhand is the largest producer of coal, while Rajasthan is the largest producer of petroleum; do not attach petroleum to Jharkhand.
- Digboi is both the oldest oil field and the oldest refinery, but the largest oil field by production is the offshore Mumbai High.
- Odisha leads in bauxite, manganese and aluminium, while Madhya Pradesh leads in limestone and Karnataka in gold.
- Anthracite is the highest grade of coal, while coking coal is the coal used to make coke for the iron and steel industry.
Frequently Asked Questions
What is a mineral and what are its two main types?
A mineral is a naturally occurring inorganic substance with a definite chemical composition. Minerals are divided into metallic and non-metallic types. Metallic minerals contain metal and include iron ore, bauxite, manganese, copper, gold and silver, while non-metallic minerals such as mica, limestone, salt and gypsum do not contain metal. Minerals are exhaustible, so they must be mined carefully and used efficiently.
Which state leads in iron ore and what are the main iron ores of India?
Odisha is the largest producer of iron ore in India, and the largest iron ore field is the Singhbhum field in the Jharkhand-Odisha belt. Magnetite is the highest grade of iron ore, while hematite is the most important iron ore of India. The Bailadila iron ore field is in the Bastar district of Chhattisgarh, and India's total reserve of iron ore is about 33 billion tonnes.
Which state leads in coal production and what are the important coal facts?
Jharkhand is the largest producer of coal in India, and the largest coal field is Jharia in Jharkhand. The oldest coal field is Raniganj in West Bengal, and the largest coal-producing company is Coal India Limited, established in 1975. India ranks second in the world in coal production after China. Anthracite is the highest grade of coal, and coking coal, which can be converted into coke, is essential for the iron and steel industry.
Which state leads in petroleum and what are the important oil fields and refineries?
Rajasthan is the largest producer of petroleum in India, followed by Gujarat and Assam. The oldest oil field of India and the oldest oil refinery are both at Digboi in Assam, which is called the birthplace of the Indian oil industry. The largest oil field by production is the offshore Mumbai High, discovered in 1974. India's crude oil production is about 30 million tonnes a year, far less than its demand, so a large quantity is imported.
Which states lead in bauxite, manganese, limestone, gold, mica and uranium?
Odisha has the largest reserve and is the largest producer of bauxite; the largest bauxite mine is Panchpatmali in Odisha, and Odisha also leads in aluminium and manganese. Madhya Pradesh is the largest producer of limestone, the raw material of cement. Karnataka is the largest producer of gold, with the oldest gold mine at Kolar. Jharkhand is the largest producer of mica and has the largest reserve of uranium in India.