Class 10 Geography Chapter 5 Minerals and Energy Resources
🌍 Chapter 5: Minerals and Energy Resources
(कक्षा 10 भूगोल – खनिज और ऊर्जा संसाधन)
🔹 Introduction: Minerals in Daily Life (दैनिक जीवन में खनिजों का महत्व)
- हम अपने daily life में metals से बनी चीज़ें use करते हैं – जैसे needle, building, car, bus, plane, road आदि।
- ये सारे minerals से बने होते हैं जो earth’s crust (पृथ्वी की पपड़ी) में rocks के अंदर पाए जाते हैं।
- मानव जीवन के हर stage में – livelihood, decoration, religion और industry – minerals का उपयोग हुआ है।
🦷 Example: Toothpaste में silica, limestone, fluoride, titanium oxide, mica आदि minerals होते हैं।
🔹 What is a Mineral? (खनिज क्या है?)
- Definition: A homogeneous, naturally occurring substance with a definite chemical composition and structure.
- Minerals nature में बहुत अलग-अलग रूपों में मिलते हैं — जैसे diamond (hardest) और talc (softest)।
- ये minerals rocks के अंदर पाए जाते हैं।
💡 Note:
Rocks = combination of minerals.
कई rocks एक mineral से बने होते हैं (जैसे limestone), और कई में कई minerals होते हैं।
🔹 Study of Minerals (खनिजों का अध्ययन)
- Geographers – minerals को earth’s crust का हिस्सा मानकर landforms और economic activities के अनुसार study करते हैं।
- Geologists – minerals की formation, age, structure, composition का अध्ययन करते हैं।
🔹 Mode of Occurrence of Minerals (खनिजों की उत्पत्ति के प्रकार)
1️⃣ In igneous and metamorphic rocks – cracks या joints में minerals भर जाते हैं।
- Small deposits = veins, large = lodes
- Examples: Tin, Copper, Zinc, Lead
2️⃣ In sedimentary rocks – minerals layers या beds में जमा होते हैं।
- Example: Coal, Iron Ore, Gypsum, Potash Salt
3️⃣ By decomposition of surface rocks – जब weathering होती है तो Bauxite बनता है।
4️⃣ Alluvial deposits (Placer deposits) – नदी की रेत में minerals जमा हो जाते हैं।
- Example: Gold, Silver, Tin, Platinum
5️⃣ Ocean waters & beds – common salt, magnesium, bromine, manganese nodules।
🔹 Major Mineral Belts of India (भारत में प्रमुख खनिज पट्टियाँ)
- Peninsular region – metallic minerals, coal, mica
- Gujarat & Assam – petroleum
- Rajasthan – non-ferrous minerals
- North Indian Plains – almost mineral-less
🪨 Types of Minerals (खनिजों के प्रकार)
⚙️ 1. Ferrous Minerals (लौहधातु खनिज)
- Iron और Manganese शामिल हैं
- इनसे metallurgical industries को raw material मिलता है।
- ये total metallic production का 75% हिस्सा हैं।
🧲 Iron Ore
- Backbone of industrial development
- Types:
- Magnetite – 70% iron, magnetic
- Hematite – 50-60% iron, widely used
- Major belts:
- Odisha–Jharkhand belt (Badampahar, Noamundi)
- Durg–Bastar–Chandrapur belt (Bailadila hills)
- Ballari–Chitradurga–Kudremukh (Karnataka)
- Maharashtra–Goa belt (Ratnagiri, Marmagao)
⚫ Manganese
- Used in steel manufacturing, bleaching powder, paints, insecticides
- Major producers: Madhya Pradesh, Maharashtra, Odisha, Karnataka, Andhra Pradesh
⚱️ 2. Non-Ferrous Minerals (अलौह धातु खनिज)
🧯 Copper
- Used in electrical cables, electronics
- Major mines: Balaghat (MP), Khetri (Rajasthan), Singhbhum (Jharkhand)
🪨 Bauxite
- Source of aluminium (light, strong, malleable)
- Found in Amarkantak Plateau, Maikal Hills, Bilaspur-Katni, Odisha (Koraput – Panchpatmali deposits)
💎 3. Non-Metallic Minerals (अधात्विक खनिज)
✨ Mica
- Used in electrical & electronic industries (good insulator)
- Found in Koderma-Gaya-Hazaribagh belt (Jharkhand), Ajmer (Rajasthan), Nellore (Andhra Pradesh)
🪶 Limestone
- Basic raw material for cement & iron smelting
- Found in sedimentary rocks across India
⚠️ Hazards of Mining (खनन से हानियाँ)
- Dust & fumes → Lung diseases
- Mine collapse, fires, land degradation, water pollution
- Need for environmental laws and safe mining practices
🛡️ Conservation of Minerals (खनिजों का संरक्षण)
- Minerals are finite & non-renewable.
- Formed over millions of years, hence must be used judiciously.
- Methods:
- Use improved technology
- Recycle metals
- Use substitutes
⚡ Energy Resources (ऊर्जा संसाधन)
🔸 Types of Energy Resources
1️⃣ Conventional sources – coal, petroleum, natural gas, hydro & thermal power, firewood, dung cake
2️⃣ Non-conventional sources – solar, wind, tidal, geothermal, biogas, atomic
🔹 Coal (कोयला)
- Most abundant fossil fuel
- Used in power generation & industries
- Types: Peat, Lignite, Bituminous, Anthracite
- Major fields:
- Damodar Valley (Jharia, Raniganj, Bokaro)
- Godavari, Mahanadi, Son, Wardha Valleys
- Tertiary coals – Meghalaya, Assam, Nagaland
🔹 Petroleum (खनिज तेल)
- Provides fuel, lubricants, raw materials
- Found in anticlines & fault traps
- Major fields: Mumbai High, Gujarat (Ankleshwar), Assam (Digboi, Naharkatiya, Moran)
🔹 Natural Gas (प्राकृतिक गैस)
- Found with petroleum
- Used in power, fertilizer & domestic fuel
- Major reserves: Mumbai High, Cambay Basin, Krishna-Godavari Basin
- HVJ Pipeline (Hazira–Vijaipur–Jagdishpur) connects gas fields to industries.
🔹 Electricity
- Two types:
- Hydel power – from running water
- Thermal power – from coal, oil, gas
- Major projects: Bhakra Nangal, Damodar Valley, Kopili
☀️ Non-Conventional Sources of Energy
🌞 Solar Energy
- India = tropical country → huge potential
- Solar plants reduce firewood use
🌬️ Wind Energy
- Major states: Tamil Nadu, Gujarat, Maharashtra, Karnataka, Andhra Pradesh
- Famous sites: Nagarcoil, Jaisalmer
🔋 Biogas
- From shrubs, farm waste, animal dung
- ‘Gobar Gas Plants’ → twin benefit – fuel + manure
🌊 Tidal Energy
- From ocean tides
- Sites: Gulf of Khambhat, Gulf of Kachchh (Gujarat), Sunderbans (West Bengal)
🌋 Geothermal Energy
- From earth’s internal heat
- Projects: Manikaran (Himachal Pradesh), Puga Valley (Ladakh)
☢️ Nuclear Energy
- From Uranium & Thorium
- Found in Jharkhand, Rajasthan, Kerala (Monazite sands)
♻️ Conservation of Energy Resources
- Energy is essential for development.
- Promote renewable energy and energy-saving practices:
- Use public transport
- Switch off electricity when not needed
- Use energy-efficient appliances
- Adopt solar, wind, biogas
- “Energy saved is energy produced.”