what is mining? mining: is extracting ore or minerals from the ground ore: the natural material...
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What is mining?What is mining?
Mining: is extracting ore or minerals from the ground
Ore: the natural material large enough and pure enough to be mined for profit.
Types of MinesTypes of Mines
• There are two main types of mines.
1) Surface Mining
2) Subsurface Mining
Surface Mining
• Surface mining is used to remove mineral deposits on or near the Earth’s surface.
• There are 3 types of surface mines:1. Open-pit: removes large, near surface deposits
of minerals such as gold and copper. Mined downward in layers
2. Quarries: stone, crushed rock, sand, gravel3. Strip Mining: removing surface coal in strips up
to 50 m wide x 1 Km long
Surface Mining• This quarry in
northwest Georgia is an open pit used to mine granite.
Subsurface Mining
Subsurface Mining
…. A video about mining
coal.
http://www.uky.edu/KGS/coal/images/minmethd.gif
Mining DemonstrationMining Demonstration
Which type of mining am I
demonstrating?
Effects of Mining on the EnvironmentEffects of Mining on the Environment
What happens to a mine when it is no longer being used?
http://www.abandoned-mines.org/home-e.htm
• Mine reclamation is the process by which land used for mining is returned to its original state or better.
• Has been required by law since the mid-1970’s.
Mining
• To reduce the effects of mining, reduce our need for minerals, reuse, and recycle.Reduce: use lessReuse: get as much use out of the materials you have.Recycle: use the material to make something else, rather than throwing it away.
About GemstonesAbout Gemstones
• Gemstones are highly valuable minerals because they are beautiful and rare, not because they are useful.
• Color is the most important characteristic of a gemstone. The more attractive the color is, the more valuable the gem is.
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