Are Metamorphism and Metasomatism the Same?

If metamorphism is defined as the process by which a mineral assemblage reequilibrates in response to changes in pressure and temperature (P, T), then metasomatism is the reequilibration of a rock involving a change in the chemical composition.

What is metasomatism in metamorphic rocks?

Metasomatism refers to the process whereby a preexisting igneous, sedimentary, or metamorphic rock undergoes compositional and mineralogical transformations associated with chemical reactions triggered by the reaction of fluids (so-called metasomatic agents), which invade the protolith.

What is the difference between metamorphism and metamorphic?

As nouns the difference between metamorphic and metamorphism

is that metamorphic is (mineralogy) a rock that has been changed from its original form by subjection to heat and/or pressure while metamorphism is (geology) the process by which rocks are changed into other forms by the application of heat and/or pressure.