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SlideshowReport

Decompression Melting

Description
Origin of Magma

Factors that influence the generation of magma from solid rock
Role of heat
Additional heat is generated by
Friction in subduction zones
Crustal rocks heated during subduction
Rising, hot mantle rocks

Factors that influence the generation of magma from solid rock
Role of pressure
Increase in confining pressure causes an increase in melting temperature
Drop in confining pressure can cause decompression melting
Lowers the melting temperature
Occurs when rock ascends
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