A mineral is a naturally occurring, inorganic solid characterised by a specific chemical composition and an organised atomic structure. Although this definition may sound complex, breaking it down reveals its fundamental components.
- Minerals are naturally formed; they are not a product of human creation.
- Minerals are inorganic substances, devoid of any past life and not composed of plant or animal matter.
- Minerals exist in a solid state; they are neither liquid (like water) nor gaseous (like the air around you).
- Minerals exhibit a definite chemical composition, each being composed of a unique combination of chemical elements.
- Minerals possess an ordered atomic arrangement, with the constituent elements organised in a distinct manner, leading to the crystalline growth observed in minerals.
These minerals represent valuable natural resources, finite and non-renewable. They serve as essential raw materials for various industries and play a pivotal role in national development. The responsible management of mineral resources is integral to the broader strategy of development, guiding mineral exploitation in alignment with long-term national goals and perspectives.
TYPES OF MINERALS
1-Metallic Minerals
Metallic minerals showcase a distinctive lustre and are composed of metals within their chemical structure. These minerals represent a valuable source of metals and are extractable through mining processes. Examples of metallic minerals include manganese, iron ore, and bauxite, which are further categorised into ferrous and non-ferrous metallic minerals.
Ferrous minerals contain iron, while non-ferrous minerals lack iron in their composition.
2-Non-metallic Minerals
Non-metallic minerals exhibit a non-metallic lustre or sheen in their appearance and do not contain extractable metals in their chemical makeup. Examples of non-metallic minerals encompass limestone, gypsum, and mica.
DISTRIBUTION OF MINERAL RESOURCES
IRON ORE
It serves as the fundamental mineral and the cornerstone of global industrial development. Iron ore, the most widely distributed element in the Earth’s crust, is seldom found in its free state but is prevalent in the composition of numerous rocks and minerals. Constituting 4.6% of the Earth’s crust, iron ore exists in four distinct categories:
i. Magnetite: Displaying a red hue, magnetite boasts a purity of 72% iron.
ii. Hematite: With a black appearance, hematite consists of 70% pure iron.
iii. Limonite: Exhibiting colours ranging from dark brown to yellow, limonite contains 50% pure iron.
iv. Siderite: Sporting a brown coloration, siderite contains a mere 30% pure iron.
Iron ore exhibits an uneven distribution worldwide, with significant deposits of good-quality iron ore located in countries such as Australia, Brazil, Russia, China, the USA, Ukraine, and Canada. Among these, Russia boasts the largest reserves of iron ore globally. In terms of production, Australia holds the position of the world’s largest producer of iron ore, followed by other major contributors like China, Brazil, India, and Russia. Remarkably, the majority of global iron ore production, accounting for 84%, is concentrated in just five countries.
MANGANESE ORE
Manganese, a type of ferro-alloy, plays a crucial role in the production of special-quality steel. When added to iron, even in small amounts, manganese serves as a “cleanser” in the manufacturing process, eliminating gases. Approximately 6 kg of manganese is utilised to produce one ton of steel.
This element contributes to the creation of high-quality steel, imparting anti-corrosive properties, hardness, and cleanliness. Manganese enhanced toughness, strength, and durability, making steel resistant to oxidation in blast furnaces. Moreover, it is employed in alloy production with copper, bronze, and nickel. Industries leverage manganese for the manufacturing of heavy machinery, tools, bleaching powder, insecticides, and paints.
Distribution and Production of Manganese Ore:
Major manganese ore reserves are found in countries like South Africa, Australia, China, Gabon, Kazakhstan, Brazil, India, Ghana, Ukraine, and Mexico. South Africa stands out as the world’s largest producer of manganese ore, closely followed by Australia. China, Gabon, and Brazil also rank among the leading manganese producers. Despite possessing the largest manganese reserves globally, India is the eighth-largest producer of manganese.
COPPER ORE
Copper, a non-ferrous metal with a soft brown hue, exhibits excellent conductivity, high lustre, density, and melting point. It exists in three forms: as a native metal in its pure state, as oxides, and as sulphide.
The primary ore for copper is copper pyrite, contributing to nearly 76% of global copper production. Extraction involves a process comprising crushing, concentration, roasting, smelting, and refining. Known since the earliest stages of civilization, copper stands among the first metals utilised by humans. It is found in igneous and metamorphic rocks and is initially soft. When alloyed with tin, it forms bronze, while mixing with zinc produces brass—both alloys are harder and tougher than pure copper.
Production and Distribution of Copper:
Copper deposits are globally distributed, with major production centres in Chile, Peru, China, the USA, and Congo. Chile leads as the largest global producer, contributing 27.20% to the world’s copper output, followed by Peru at 11.53%. India holds the 35th rank globally, contributing only 0.15% to the world’s copper production.
BAUXITE
Bauxite, a crucial ore serving as the primary source of Aluminum, is characterised by its impure raw nature. Typically found as a constituent in intricate minerals like Cryolite, Corundum, and Kaolin, bauxite is often situated close to the surface and is primarily extracted through open-cast mining methods. Its versatile applications span various sectors, encompassing the construction of buildings, utensils, and aeroplane components.
Production and Global Distribution of Bauxite:
The principal bauxite producers globally include Australia, China, Brazil, Guinea, and India. Notably, the leading producers and exporters of bauxite are concentrated in tropical and subtropical regions. Australia holds the top position as the largest global bauxite producer, followed by China, Brazil, Guinea, and India. India stands as the fifth-largest producer of bauxite worldwide.
GOLD
Gold, a precious metal of immense value, manifests itself in various forms, either in alluvial or placer deposits or embedded in reefs or lodes beneath the Earth’s surface. Renowned for its aesthetic appeal, gold finds extensive use in the creation of jewellery and plays crucial roles in dentistry, glass and porcelain dyes, medicinal applications, and various industries.
Noteworthy Aspects of Gold:
- Jewellery and Aesthetics: Gold is a coveted material for crafting exquisite jewelry due to its inherent beauty and rarity.
- Dentistry: Its malleability and biocompatibility make gold a valuable component in dental applications, contributing to dental restorations and prosthetics.
- Industrial Applications: Gold serves practical purposes in industries such as glass and porcelain production, where its unique properties are harnessed.
- Medical Uses: Gold is employed in certain medicinal treatments and diagnostic tools, showcasing its versatility.
- Purity Measurement: The purity of gold is commonly expressed in terms of carats, denoting the ratio of pure gold content to the total alloy composition. For instance, 24-carat gold is considered pure, while lower caratages indicate a mix of gold with other metals.
Global Producers:
Leading the world in gold production are China, Australia, Russia, the USA, and Canada. These countries contribute significantly to the global supply of gold, playing pivotal roles in the extraction and distribution of this precious metal.
MICA
Mica, derived from the Latin word “micare,” signifying to shine, flash, or glitter, boasts a distinctive crystalline and layered structure, allowing it to be easily split into remarkably thin sheets. Its unique properties make it a versatile and valuable material with various applications.
Key Characteristics of Mica:
- Crystalline Structure: Mica’s crystalline and layered structure contributes to its ability to be divided into thin, flexible sheets.
- Chemical Inertness: It remains unresponsive to water, acids, oil, or solvents, enhancing its durability and resilience.
- Lightweight and Flexible: Mica’s lightweight and flexible nature make it a versatile material for different applications.
- Temperature Resistance: It can withstand extremely high temperatures and sudden temperature changes, making it suitable for diverse environments.
- Insulating Properties: Mica exhibits excellent insulating capabilities, resisting high voltages with minimal power loss.
- Light Absorption and Reflection: Its ability to absorb or reflect light not only allows for decorative effects but also provides protection against ultraviolet (UV) light.
Major Applications of Mica:
- Paint and Coatings Sector: Mica is utilised in the formulation of paints and coatings, imparting unique properties and enhancing performance.
- Cosmetics and Personal Care: It is a common ingredient in cosmetics and personal care products, contributing to their texture and appearance.
- Plastics and Printing Inks: Mica finds application in the plastics and printing ink manufacturing processes, enhancing the quality and functionality of the final products.
- Electronics: Due to its insulating properties, mica is crucial in the electronics sector, where it is used as an insulator in various components.
- Automotive Industry: Mica is employed in the automotive sector for its heat-resistant and insulating qualities, contributing to the manufacturing of durable components.
- Construction Industry: Mica is used in construction materials, providing durability, insulation, and aesthetic qualities.
- Oil Industry: It finds application in the oil industry, where it serves various purposes, including insulation and protective coatings.
In essence, mica’s diverse characteristics make it an indispensable material across several industries, showcasing its adaptability and value in various manufacturing processes and end products.
PHOSPHATE
Phosphate, a vital mineral, is commonly found in sedimentary rocks or as phosphate nodules. Guano, a natural fertiliser derived from bird droppings, also serves as a notable source. Phosphate stands as the primary supplier of phosphorus, crucial for various applications, with its predominant use being in fertilisers.
Key Points:
- Occurrence: Phosphate is present in sedimentary rocks and as nodules, with Guano (bird droppings) being an alternative source.
- Importance: It is a paramount source of phosphorus, playing a vital role in various applications, particularly as a key component in fertilisers.
- Guano: Guano deposits, rich in phosphates, are notably found in the Peruvian and Chilean deserts in South America.
- Global Production: China holds the position of the largest global producer of phosphate. Other leading contributors include Morocco, the USA, Russia, and Peru.
- Application: Primarily utilised in the production of fertilisers, phosphate supports the growth of crops by providing essential phosphorus nutrients. India holds the 20th position among the world’s largest producers of phosphate.
In essence, phosphate’s significance lies in its role as a primary supplier of phosphorus, contributing to global agricultural practices through its application in fertiliser production. The presence of Guano deposits in South America and the substantial production by key nations underscores its global importance.
FAQs – MINERAL RESOURCES
1. What defines a mineral, and what are its basic characteristics?
A mineral is a naturally occurring, inorganic solid with a specific chemical composition and an organised atomic structure. Basic characteristics include being naturally formed, inorganic, solid, having a definite chemical composition, and an ordered atomic arrangement.
2. Why are minerals considered valuable natural resources?
Minerals are finite and non-renewable resources that serve as essential raw materials for various industries, playing a pivotal role in national development.
3. How are metallic minerals different from non-metallic minerals?
Metallic minerals, such as manganese, iron ore, and bauxite, contain metals in their chemical composition and are extractable through mining. Non-metallic minerals, like limestone and mica, lack extractable metals and exhibit a non-metallic lustre.
4. What are the categories of ferrous and non-ferrous metallic minerals?
Ferrous minerals contain iron, while non-ferrous minerals do not. Examples of ferrous minerals include iron ore, while non-ferrous minerals may include bauxite.
5. How is iron ore distributed globally, and which countries are major producers?
Iron ore exhibits an uneven distribution globally, with major deposits in Australia, Brazil, Russia, China, the USA, Ukraine, and Canada. Russia has the largest reserves, and Australia is the world’s largest producer.
6. What role does manganese play in steel production?
Manganese, a ferro-alloy, is used to manufacture special-quality steel. It acts as a ‘cleanser’ in the manufacturing process, removing gases and contributing to the steel’s toughness, strength, and anti-corrosive properties.
7. Where are major manganese ore reserves found, and who are the leading producers?
Major manganese ore reserves are found in South Africa, Australia, China, Gabon, and Brazil. South Africa is the largest producer, followed by Australia, China, and Gabon.
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