Metallic minerals become concentrated in liquid magma because they

Metallic minerals become concentrated in liquid magma because they undergo igneous and hydrothermal processes.

Explanation:

The magma that is formed deep beneath the 'surface of the Earth' carries various earth minerals to the surface of the Earth through convective actions. It is responsible for the melting of solid minerals in the interiors of Earth. The minerals as a result of melting, liquify and reach the levels where their density allows them to float. This results in the concentration of minerals in liquid magma.

This would be an open primary. a closed primary people can vote only prior to election day if the party if they are registered. independent voters can not participate. there is not a wide-open primary, but there is a semi-open primary.

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary.