While dissolved minerals are present in magma, they are not the primary force driving volcanic eruptions. The main driving forces are:

* Buoyancy: Magma is less dense than the surrounding rock, so it naturally rises towards the surface.

* Gas pressure: Dissolved gases like water vapor and carbon dioxide expand as magma rises and pressure decreases. This expansion creates pressure that can eventually overcome the surrounding rock strength, leading to an eruption.

While dissolved minerals can contribute to the viscosity of magma, which influences how easily it flows and erupts, they are not the primary source of the force that causes the eruption.