UNIT 6 EARTH SCIENCE

Natural material which

concentration of valuable

minerals is high enough for the

material to be mined profitably.

• Ore

• metal

• diamond

• copper

what is the meaning of MGB

two methods of mining

• surface mining

• underground

• placer-deposits

• deep-sea

used to extract one minerals near the surface near the surface of the earth

is a controlled use of explosives

• blasting

• bombing

most common type of surface mining

• open pit mining

• big hole

• strip mining

involves the removal of a thin strip of overburden

• strip mining

• open pit mining

• big hole

process of mining materials from the bottom of a body of water

• dredging

• strip mining

• open pit mining

used to extract the rocks and minerals that can be found beneath the earth surface

removal of a portion needed for analysis of this material

• sampling

• analysis

• comminution

• dewatering