What Process Can Enrich a Copper Deposit, Perhaps Making It

question 38

Multiple Choice

What process can enrich a copper deposit, perhaps making it profitable?

• A) intense fracturing associated with meteoroid impacts, like at Sudbury
• B) deposition of large amounts of quartz and calcite in the rock
• C) dispersing the copper-rich grains by wind and water
• D) leaching by weathering and redeposition at the water table

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Definitions:

Vertical Exaggeration

A scale manipulation technique used in topographical maps or models to emphasize the vertical features by increasing their height relative to the horizontal aspects.

Permeability

The ability of a material, such as rock or soil, to allow fluids to pass through it, important in determining the movement of water and hydrocarbons in the Earth.

Water Table

The upper surface of the zone of saturation in the ground where soil or rocks are permanently saturated with water.

Topography

The arrangement of natural and artificial physical features of an area, including its relief, and the position of these features.