Describe the two basic types of igneous processes that may produce an ore deposit during the crystallization of magma, and provide examples of metals that may be concentrated by these processes.

Answer and Explanation:

Igneous rock is formed by a liquid rock when it freezes into solid rock. This molten material is in the ground is called magma, and when it is on the surface, it is called lava.

Magma Generation:

Magma and lava contain three components:

•melt

•solids

•volatiles

It is made of ions from minerals that have liquefied. Minerals floating in the liquid melt made crystallized minerals. These minerals may have already cooled Volatiles are gaseous components, for example, water vapour, carbon dioxide, sulfur, and chlorine—dissolved in the magma. The amount of these components affects the physical behaviour of the magma.

Bowen’s Reaction Series:

Bowen’s Reaction Series describes how the minerals crystallize when cooled, or melt when it is heated. The low end of the temperature scale where all minerals crystallize into solid rock is:

Approximately 700°C (158°F)

The upper end of the range where all minerals exist in a molten state is:

Approximately 1,250°C (2,282°F)

These two basic types of igneous processes produce an ore deposit during the crystallization of magma.

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