MINING. Example: Coal Example: Gold Ore Example: Iron Ore (steel!)

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Presentation transcript:

MINING

Example: Coal

Example: Gold Ore

Example: Iron Ore (steel!)

Iron Ore Outcrop

Uranium Ore

Copper Ore

High vs. Low Grade Ore

Getting to and obtaining the coal or ore:

Removing Overburden

Deposited as Spoils

For some (such as gold): Cyanide Heap Leaching

Or:

Emerald on Gangue

Tailings pond

Environmental Effects: Scarring of land Disrupted ecosystems (loss of biodiversity POLLUTION: air, water, soil

Acid Mine Drainage (AMD)

smelting

How can environmental damage be reduced??? The 3 r’s: ??? –Reduces environmental impact and reduces depletion time of a mined resource Figure 16-5: “Life” cycle of a metal resource

TYPES OF MINING Surface and Subsurface

Surface Mining Open Pit

Dredging

Strip Mining

Mountain-top Removal

Subsurface Mining Room and Pillar

Longwall

In-Situ

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