![]() ![]() The most common elements found in magma include: However, the chemical composition of magma is primarily determined by the proportion of the major elements present, in. The chemical composition of magma can vary widely depending on the type of rocks that are being melted and the geological setting in which the magma is formed. Magma is typically composed of silicate minerals such as quartz, feldspar, and mica, as well as dissolved gases such as water vapor, carbon dioxide, and sulfur dioxide. The composition of magma refers to the type and amount of minerals and gases present in the fluid. As magma rises towards the surface, the pressure decreases, which can cause it to expand and release dissolved gases. Pressure: The pressure of magma is high due to the weight of the overlying rock and fluids.The temperature of magma depends on its composition, with more silicate-rich magmas generally having lower temperatures. Temperature: Magma is very hot, with temperatures that can range from 700 to 1300 degrees Celsius.However, the density of magma can vary depending on its composition and temperature. Density: Magma is less dense than the surrounding rocks and fluids at depth, which allows it to rise towards the surface.High-viscosity magma is more likely to build up pressure and cause explosive volcanic eruptions. ![]() Magma has a high viscosity due to its high content of silicate minerals and dissolved gases, which make it thick and sticky.
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