Mining and Refining_fillin version

Mining and Refining_fillin version - Mining and Refining...

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Mining and Refining Minerals Process of mining How do we extract minerals from the lithosphere (Earth’s crust and upper mantle) for use? Generally, there are 2 types of mining The type used depends on how far __________ the Earth’s surface you have to dig before reaching minerals. Before either type of mining, ___________ needs to be removed. ____________ is overlying soil, vegetation, and rock. 1. Surface mining – extracting minerals near Earth’s surface a. ______-pit mine i. Large holes are dug ii. A giant open-pit mine is called a ________ b. ________ mine i. Trenches are dug parallel to each other ii. Overburden of new trench ______ old one and is called spoil bank 2. Subsurface mining – extracting minerals from ________ underground deposits a. Shaft mine i. Dug straight down ii. Carry up broken-up ore in buckets b. _______ mine i. Like shaft mine, but dug on a slope (has a slanted opening) ii. Can carry ore up in carts Which type of mining is more damaging to land, surface or subsurface mining? _____________ mining is more damaging to land. Which is more dangerous to humans? Though __________ mining is less damaging to land, it is more dangerous to humans. Explosions, _________, and _______ disease are risks of ____________ mining. Refining Minerals Once collected, how are minerals processed, how are impurities removed?
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  • Fall '09
  • Farell
  • Iron ore

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