At divergent boundaries what metamorphism happens?

At divergent boundaries, where tectonic plates move apart, the primary type of metamorphism that occurs is called hydrothermal metamorphism. This process is driven by the influx of seawater and the heat from underlying magma, leading to the alteration of minerals in the oceanic crust. As seawater circulates through the fractures and heated rocks, it facilitates the formation of new minerals, such as zeolites and amphiboles, while also altering existing ones. This environment is characterized by the creation of features like black smokers and mineral deposits.