How is decompression melting triggered? - Answers Decompression melting occurs when a decrease in pressure on a mantle rock causes it to melt without an increase in temperature This process is related to Earth's internal convection because
What is decompression melting? - Answers Melting of material under divergent plate boundaries is primarily caused by decompression of rock as tectonic plates move apart, reducing pressure on the underlying mantle and allowing rock to melt
Where does most magma originate? - Answers Most melts on earth originate from plate boundaries These are areas where there is decompression melting or hydrous melting because of subduction zones
Which part of the Earth is the source of magma? - Answers Lava is magma that reaches the surface Magma originates either from rising plumes of heat at hot spots in the Earth's mantle, where decompression melting takes place as the hot rock nears the