Size: Large tonnage, low to medium grade deposits
Significance: World's major source of copper and molybdenum and an important source of gold
Examples: Mount Polly, BC (Imperial Metals); Highland Valley Copper (Teck) , BC
Hosted: Range of rock types within and around a related intrusion
Mineralization: Copper and molybdenum sulfide minerals Cu Au Mo
Structures and shape: Fractures, stockworks, veins, disseminations; large, oval or spherical
Mining Method: Normally Open-pit
Drill intersection: Mineralization should be near surface (top 100 meters) and define a deposit at least hundreds of meters in size in all dimensions
Tonnes (Mt): 10-1000, usually at least 100 Mt.
Grades: CU %: 0.25-1.0
AU (g/t): 0.1-1.0
Mo%: 0.01-0.15
Ag (g/t): 1.0-3.0
Source: Vanessa MacLean Resource World Magazine April 2013
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