Basaltic Magma Has A Lower Silica Content Than Granitic Magma

The magma collects in magma.

Basaltic magma has a lower silica content than granitic magma.

Melts of crustal rocks tend to have granitic or rhyolitic compositions see section 4 and these can mix with the basaltic magma to make a hybrid rock that also has a broadly andesitic composition. The silica content of basaltic magmas is between 45 and 55 percent which is lower than any other magma type. Solidify magma with a high water content has a greater tendency to in the crust compared with a magma with a lower water content. Granitic magma has high levels of potassium and sodium while basaltic magma has very low levels of these minerals.

This is a type of magma that has a low silica content and forms a rock called basalt when it crystalizes. Why does magma rise and collect in magma chambers. Thus basaltic magmas tend to be fairly fluid low viscosity but their viscosity is still 10 000 to 100 0000 times more viscous than water. Asked sep 13 2016 in environmental atmospheric sciences by gibby.

The intrusion of significant amounts of basaltic magma into the continental crust can lead to melting and remobilization of the crust. These magmas are derived from a silica poor mantle source. Basaltic magmas have a high low silica content and a high low viscosity. Lower temperature magmas have higher viscosity than higher temperature magmas viscosity decreases with increasing temperature of the magma.

Magma rises due to the partial melting of mantle rocks. Basaltic magma rhyolitic magma andesitic magma. A bimodal compound is one that is made of two components that vary in their texture and composition. The term is often used to describe volcanic terrains of almost equal parts of mafic and felsic rocks.

List these three magmas in order from the most silica rich to the least silica rich composition. Higher sio 2 silica content magmas have higher viscosity than lower sio 2 content magmas viscosity increases with increasing sio 2 concentration in the magma. Because of the relatively low silica content and high temperature basaltic magmas have the lowest viscosity of all magma types meaning that they are thinner and more free flowing although it is still usually between 15 000 and 100 000 times less fluid or free flowing than water. Basaltic magma contains between 45 and 55 percent silicon dioxide and is high in magnesium iron and calcium while granitic magma contains between 65 and 75 percent silicon dioxide and only small amounts of those minerals.

Granitic magma is higher in silica than basaltic magma.