Maarg Manthan · Topic 2.3

Metallic Minerals (Precious, Ferrous, Non-Ferrous)

Geography › Geology – Minerals and Rocks · Topic 2.3

Metallic minerals are minerals that contain one or more metals and can be melted to give new products. They fall into three groups. Ferrous minerals, such as iron ore, manganese, chromite and nickel, contain iron or are used with it to make steel. Non-ferrous minerals, such as copper, bauxite, lead, zinc and tin, have no iron. Precious metals are gold, silver and platinum. Metals are concentrated in ore bodies by volcanic, sedimentary and metamorphic processes.

5 min read · UPSC Prelims · Geography · Geology – Minerals and Rocks

At a Glance

Ferrous Iron, manganese, chromite, nickel, cobalt, tungsten
Non-ferrous Copper, bauxite, lead, zinc, tin
Precious Gold, silver, platinum
Main iron ores Hematite and magnetite
Main aluminium ore Bauxite
Exam link UPSC Prelims, Geography: Geology – Minerals and Rocks

Where Does It Fit?

This topic applies the study of minerals to the metals that industries use. It gives the geological classification and examples, while the full economic geography of mineral and energy resources is taken up in a later macro. Previous topic: Physical Characteristics of Minerals (Crystal Form, Cleavage, Fracture, Lustre, Colour, Streak, Hardness, Specific Gravity). Next topic: Non-Metallic Minerals (Sulphur, Phosphates, Cement Minerals).

How Are Metallic Minerals Classified?

Group	Meaning	Examples
Ferrous	Contain iron, or are alloyed with iron to give steel	Iron ore, manganese, chromite, nickel, cobalt, tungsten, molybdenum
Non-ferrous	Do not contain iron in a major way	Copper, bauxite (aluminium), lead, zinc, tin, mercury
Precious	Rare, valuable and corrosion-resistant	Gold, silver, platinum

Metallic minerals are usually found in igneous and metamorphic rocks, in veins and lodes, and some are found as placer deposits in sands and gravels that have been sorted by running water. Metals can be melted and reshaped, are good conductors of heat and electricity, and many can be recycled again and again.

Most metals are rare in the crust and become ores only where natural processes have concentrated them hundreds of times above the average. Magma can concentrate chromite, nickel and platinum as it cools. Hot, mineral-rich water makes veins of gold, copper, lead and zinc. Weathering in warm, wet regions leaves bauxite and some iron and manganese ores. Rivers and waves sort heavy grains such as gold and tin into placers. The word critical minerals is now used for metals such as lithium, cobalt, nickel and rare earths that are vital to batteries and electronics and whose supply is concentrated in a few countries, which makes them a matter of policy for India.

What Are the Main Ferrous Minerals?

Iron ore: the chief ores are hematite (about 70 per cent iron) and magnetite (about 72 per cent iron, and magnetic). Much of the world’s iron comes from ancient banded iron formations, as in Evolution of the Lithosphere, Atmosphere and Hydrosphere. In India the main belts are in Odisha, Jharkhand, Chhattisgarh, Karnataka and Goa. Australia and Brazil are the largest producers and exporters.
Manganese: used to harden steel and in dry batteries. India’s main producers are Odisha, Madhya Pradesh, Maharashtra and Karnataka. South Africa and Australia are leading producers abroad.
Chromite: used in stainless steel and for plating. Odisha has most of India’s chromite, and South Africa, Kazakhstan and India are leading producers.
Nickel, cobalt, tungsten and molybdenum: alloy metals that add strength and heat resistance. Nickel in India is limited, and China leads in tungsten.

What Are the Main Non-Ferrous Minerals?

Metal	Ore	Uses	Main areas
Aluminium	Bauxite, a weathering product of rocks in tropical regions	Aircraft, vehicles, packaging, cables	Odisha, Gujarat, Jharkhand, Maharashtra in India; Australia, Guinea, China
Copper	Chalcopyrite	Electrical wires, alloys such as brass and bronze	Rajasthan (Khetri), Madhya Pradesh (Malanjkhand), Jharkhand in India; Chile, Peru
Lead and zinc	Galena and sphalerite	Batteries, galvanising, alloys	Rajasthan (Zawar, Rampura Agucha) in India; China, Australia
Tin	Cassiterite	Coating, solder, bronze	Little in India; China, Indonesia, Malaysia and Myanmar

Bauxite is formed when heavy tropical rain leaches silica from rocks and leaves behind aluminium oxides, a process described with laterite in Black soil From basalt (Deccan Traps) Red soil From granite and gneiss…">Relationship Between Rocks and Soils. Rankings of producers change from year to year, so the latest data should be checked before use.

What Are the Precious Metals?

Gold: found as native metal in quartz veins and in placer deposits. India produces very little; the main primary mine is Hutti in Karnataka, and the Kolar Gold Fields in Karnataka were closed in 2001. China, Australia, Russia and Canada are leading producers.
Silver: found with lead and zinc ores. In India, it is mostly a by-product of Rajasthan’s lead-zinc mining. Mexico and Peru are leading producers.
Platinum: a dense, rare metal used in catalysts and jewellery. South Africa and Russia hold most reserves.

As an analytical point, a country’s metal wealth depends on its geology: the old shield rocks of India hold iron, manganese, bauxite and copper, but the country depends on imports for metals such as nickel, cobalt and much of its copper. The wider pattern is in the macro on mineral and energy resources, and the minerals’ physical properties in Physical Characteristics of Minerals (Crystal Form, Cleavage, Fracture, Lustre, Colour, Streak, Hardness, Specific Gravity).

Why Is This Topic Important?

Classification Frequent Prelims theme
India Producer states are asked
Economy Basis of industry

What Came Next?

The next topic covers non-metallic minerals such as sulphur, phosphates and the minerals used to make cement. Next topic: Non-Metallic Minerals (Sulphur, Phosphates, Cement Minerals).

Key People and Terms

Ferrous Containing iron
Non-ferrous Without iron
Hematite Iron ore, about 70 per cent iron
Bauxite Aluminium ore
Placer deposit Metal grains concentrated by water
Alloy Mixture of metals

Exam Corner

Points to Remember

Magnetite has the highest iron content, about 72 per cent.
Bauxite is the ore of aluminium.
Manganese is used to harden steel.
Gold: Hutti, Karnataka; Kolar closed in 2001.
Copper in India: Khetri, Malanjkhand.

Do Not Confuse With

Ferrous and non-ferrous With iron versus without iron
Hematite and magnetite Red, non-magnetic versus black, magnetic
Mineral and metal Natural compound versus extracted element

Memory Hook

Iron, manganese, chrome are ferrous kin; copper, bauxite, lead and zinc, non-ferrous win.

Mains Angle

Questions link minerals to industry and trade. These points add depth.

Distribution Old shields hold metals
Dependence Imports of scarce metals
Policy Critical minerals

A Question You May Face

An original practice question, not a past paper question.

“Classify metallic minerals and discuss the distribution of important ferrous and non-ferrous minerals in India.”

How to Answer

Classify Ferrous, non-ferrous, precious.
Ferrous Iron and manganese belts.
Non-ferrous Bauxite, copper, lead-zinc.
Gaps Import dependence.

GS Relevance

Prelims: classification of metallic minerals, key ores and Indian producers. GS Paper 1: distribution of key natural resources.

Frequently Asked Questions

What are ferrous and non-ferrous minerals?

Ferrous minerals contain iron or are used with iron to make steel, and include iron ore, manganese, chromite and nickel. Non-ferrous minerals, such as copper, bauxite, lead, zinc and tin, have no significant iron content. Precious metals such as gold, silver and platinum form a separate group.

Which is the best quality iron ore?

Magnetite is the best quality iron ore, with about 72 per cent iron and magnetic properties. Hematite, with about 70 per cent iron, is the most widely used ore. Both are mined in India in Odisha, Jharkhand, Chhattisgarh and Karnataka, and large amounts are exported.

Which ore is used to obtain aluminium?

Aluminium is obtained from bauxite, which forms in tropical regions when heavy rain leaches out silica from rocks and leaves aluminium oxides behind. India's main bauxite is in Odisha, Gujarat and Jharkhand, while Australia, Guinea and China are the leading producers abroad.

Where are the main copper deposits of India?

The main copper deposits of India are at Khetri in Rajasthan, Malanjkhand in Madhya Pradesh, and the Singhbhum area of Jharkhand. Production meets only part of the demand, so India imports copper concentrate and refined copper. Chile and Peru are leading world producers.

Why are Kolar Gold Fields closed?

The Kolar Gold Fields in Karnataka were closed in 2001 because the mines had become very deep, up to about three kilometres, and mining costs exceeded the value of the gold recovered. Hutti in Karnataka remains India's main primary gold mine.

PYQ Practice — Statement Analysis

1 Magnetite has the highest iron content among iron ores.

True

About 72 per cent.

2 Bauxite is the ore of copper.

False

It is the ore of aluminium.

3 Manganese is mainly used to harden steel.