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The Mining Cycle PowerPoint PPT Presentation


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The Mining Cycle. Exploration. Reclamation. Mining. Images: Martin Miller. Metals-6-1. Useful metals come from rocks and minerals in the Earth’s crust. Galena sample – a main ore of lead. Image: Stonetrust, Inc. Metals-6-2.

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The Mining Cycle

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The Mining Cycle

Exploration

Reclamation

Mining

Images: Martin Miller

Metals-6-1


Useful metals come from rocks and minerals in the Earth’s crust.

Galena sample – a main ore of lead.

Image: Stonetrust, Inc.

Metals-6-2


Geologists explore for useful metals by mapping, drilling, and sampling rocks and minerals.

Image: Martin Miller

Metals-6-3


Many rocks containing useful metals are mined from surface excavations.

Image: Kennecott Utah Copper Co.

Metals-6-4


Some rocks containing useful metals are mined from underground.

Image: US Bureau of Land Management

Metals-6-5


After mining removes the rocks containing useful metals, surface disturbances are covered with soil layers and revegetated. This is called reclamation.

Image: Kennecott Utah Copper Co.

Metals-6-6


Mines are not closed until reclamation that protects surface and water resources is complete.

Before

After

Images: Gold Institute, Echo Bay Mines; S. Warren

Metals-6-7


The Mining Cycle

Exploration

Reclamation

Mining

Images: Martin Miller

Metals-6-8


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