Mining removes rocks and minerals that contain useful metals from the earth s crust
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Mining removes rocks and minerals that contain useful metals from the Earth s crust. - PowerPoint PPT Presentation


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Mining removes rocks and minerals that contain useful metals from the Earth’s crust. Image: G. Plumlee, USGS. Metals-2-1. Many mines are large surface excavations. Image: Kennecott Utah Copper Co. Metals-2-2. Some mines are underground. Image: US Bureau of Mines. Metals-2-3.

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Mining removes rocks and minerals that contain useful metals from the earth s crust l.jpg
Mining removes rocks and minerals that contain useful metals from the Earth’s crust.

Image: G. Plumlee, USGS

Metals-2-1


Many mines are large surface excavations l.jpg
Many mines are large surface excavations. from the Earth’s crust.

Image: Kennecott Utah Copper Co.

Metals-2-2


Some mines are underground l.jpg
Some mines are underground. from the Earth’s crust.

Image: US Bureau of Mines

Metals-2-3



Explosions or blasts break metal bearing rock into blocks and fragments l.jpg
Explosions - or blasts - break metal-bearing rock into blocks and fragments.

Image: US Bureau of Mines

Metals-2-5


Metal bearing rock broken by blasting is hauled to a crusher l.jpg
Metal-bearing rock broken by blasting is hauled to a crusher.

Image: US Bureau of Mines

Metals-2-6


Slide7 l.jpg
Crushed metal-bearing rock - most pieces smaller than a baseball - is ready for processing that removes metals.

Image: Kennecott Utah Copper Co.

Metals-2-7


Slide8 l.jpg

All mines eventually deplete their valuable metal-bearing rock and close.

Image: Kennecott Utah Copper Co.

Metals-2-8


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