Metasomatism (from the Greek μετά metá "change" and σῶμα sôma "body") is the chemical alteration of a rock by hydrothermal and other fluids. [1] It is traditionally defined as metamorphism which involves a change in the chemical composition, excluding volatile components. [2]

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 …

Aug 22, 2024 · This type of hydrothermal alteration is called metasomatism. A special type of metasomatism takes place where a hot pluton intrudes into carbonate rock such as limestone. Magmatic fluids rich in silica, calcium, magnesium, iron, and other elements can dramatically change the chemistry of the limestone, forming minerals that would not normally ...

Metasomatism: is a metamorphic process by which the chemical composition of a rock or rock portion is altered in a pervasive manner and which involves the introduction and/or removal of chemical components as a result of the interaction of the rock with aqueous fluids (solutions). During metasomatism the rock remains in a solid state.

Hydrothermal metamorphism, also called metasomatism, refers to the chemical and mineralogical changes that occur in rocks as a result of the interaction with hot, chemically-active fluids (mainly water) during metamorphism.

Coupled with igneous and tectonic processes, metasomatism has played a major role in the formation of the Earth’s continental and oceanic crust and lithospheric mantle as well as in their evolution and subsequent stabilization.

Metasomatism — changes in the bulk composition of rocks in the solid State — occurs to some degree in virtually all contact metamorphic environments, although the types, scales, and causes are varied.

Metasomatism is the process of altering the composition of a rock, either by the addition or subtraction of chemical elements. The term is usually reserved for subsurface processes and, as commonly used, excludes weathering and diagenetic processes.

May 7, 2010 · Metamorphism and metasomatism both involve the reequilibration of mineral assemblages due to changes in pressure, temperature and/or chemical environment. Both processes involve material transport but on different length scales, so every metamorphic reaction is metasomatic on a local scale.

Metasomatism is allochemical and an open system where in special zones at a certain P-T level a new mineral partly or wholly different in its chemical composition from the host mineral formed.