Question

What chemical and physical characteristics of magma are most important whether the magma erupts explosively or non explosively

Answer 1

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Non explosive eruptions are favored by low gas content and low viscosity magmas (basaltic to andesitic magmas). If the viscosity is low, non-explosive eruptions usually begin with fire fountains due to release of dissolved gases. When magma reaches the surface of the earth, it is called lava.

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Answer 2

The chemical composition of the Magma determines whether the Magma will erupt explosively or mot

Explanation:

• There are a variety of gases that are present and very high pressure in the centre of the earth. Certain gases like oxides of nitrogen when present in high amount in the Magma makes it explosive.

• Other gases like hydrogen and carbon dioxide are relatively less explosive.

• There are different types of rocks containing minerals  based on the composition of the rocks and the types of mineral the exclusive nature of the the Magma can be determined. Usually  heavy metals if present in the rock makes the rock explode.

To know more about composition of magma,

Why is the amount of gas in magma important in relation to volcanic ...

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