Linked from
The 14 pages that link to Decompression melting, each with the reason it gives.
Mantle plumeRelated: How ascending plume material generates magma on the way up.
VolcanismRelated: It produces magma beneath spreading ridges and some volcanic regions.
Hotspot volcanismRelated: Upwelling mantle can melt as pressure falls beneath a hotspot.
Continental riftingRelated: Rising mantle may melt beneath rifts and supply volcanic rocks.
Flood basaltRelated: Rising mantle can partially melt and supply the enormous magma volumes.
PeridotiteRelated: It is a major way rising mantle peridotite produces basaltic magma.
VolcanologyRelated: It generates much of the magma beneath spreading ridges and volcanic hotspots.
Divergent boundaryRelated: It generates much of the basaltic magma at divergent boundaries.
Fissure ventRelated: It generates magma beneath many rift-related fissure eruptions.
Continental riftRelated: Mantle upwelling beneath some rifts produces magma by this process.