The introduction of water as a flux or decompression are thought to be the main triggers to melt peridotite and generate basalt in the upper mantle.

Name: The introduction of water as a flux or decompression are thought to be the main triggers to melt peridotite and generate basalt in the upper mantle.
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Water acts as a flux and decompression can lower the melting point of peridotite, leading to the generation of basaltic magma in the upper mantle.

The Introduction of Water as a Flux or Decompression Are