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Magmatic Explosion
Source:Leiqiong Global Geopark of China Time:2014-03-31 18:57:56

 

When a certain amount of magma concentrates in a specific area of the crust, for example, on the top of the volcanic conduit sealed by lava, the concentration of a large quantity of magma constitutes a magma chamber. If the upper closed shell is damaged by force, external pressure will drop rapidly. Then the magma in a certain depth starts to boil, separating the gas and the liquid. The magma in solid state and liquid state will transfer to the one in solid and liquid state with bubble. Once the magma pressure overwhelms the upper rock stratum, the gases will be emitted, especially the CO2、NH3、SO2、HCI、H2O in the magma. Then the volcanic plume of gases and clasts is ejected.