Which process drives magma formation at subduction zones triggering explosive volcanism?

💡 Explanation

When an oceanic plate subducts, volatiles like water are dragged into the mantle; this flux melting process lowers the mantle rocks' melting temperature triggering magma formation enabling volcanic eruptions. Therefore, fluid-induced melting results, rather than decompression, friction, or radiogenic heating which doesn't involve volatiles.

• Which seismic pattern emerges due to stick-slip behavior?
• Which geophysical effect occurs when a subducting oceanic plate has a rough surface with many seamounts?
• Which process predominantly shapes cirque dimensions in regions characterised by intense freeze-thaw cycles?
• What drainage pattern indicates underlying fractured bedrock's primary influence on stream orientation?
• Which effect accelerates when thaw-freeze cycles saturate soils on a hillslope underlain by permafrost?
• Which mechanism causes consistent trade winds between Hadley cells near the equator?