An oceanic plate that has been permeated by water before subduction will trigger melting sooner than a "dry" oceanic plate.

Name: An oceanic plate that has been permeated by water before subduction will trigger melting sooner than a "dry" oceanic plate.
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Water acts as a catalyst for melting in the mantle, which means that a plate that has been permeated by water will melt sooner than a "dry" plate during subduction. This is because water lowers the melting point of rocks, making them easier to melt.

An Oceanic Plate That Has Been Permeated by Water Before