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 (mĕt′ə-sō′mə-tĭz′əm) also met·a·so·ma·to·sis (-sō′mə-tō′sĭs)
The process by which the chemical composition of a rock is changed by interaction with fluids; replacement of one mineral by another without melting.

met′a·so·mat′ic (-măt′ĭk) adj.
met′a·so·mat′i·cal·ly adv.


(ˌmɛtəˈsəʊməˌtɪzəm) or


(Geological Science) change in the composition of a rock or mineral by the addition or replacement of chemicals
[C19: from New Latin; see meta-, somato-]


(ˌmɛt əˈsoʊ məˌtɪz əm)

also met•a•so•ma•to•sis

(-ˌsoʊ məˈtoʊ sɪs)

the series of metamorphic processes whereby chemical changes occur in minerals or rocks as a result of the introduction of material, often in hot aqueous solutions, from external sources.
met`a•so•mat′ic (-ˈmæt ɪk) adj.


the process of chemical change in rocks or other mineral masses that results in the formation of new rocks or minerals. Also metasomatosis.
See also: Geology
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References in periodicals archive ?
The rocks of Gabal El-Rubshi are highly susceptible to alteration into talc carbonate rocks as a result of CO2 metasomatism [6].
Hornblende is in the shape of short columns, which partly experienced metasomatism of biotite and chlorite and the content is about 15%.
com/science/article/pii/S0012821X17300341) The study , published in the latest edition of the journal Earth and Planetary Science Letters, calls this mechanism of deposition of silicate minerals "aerial metasomatism.
Unraveling the effects of potassium metasomatism in sedimentary rocks and paleosols, with implications for paleo weathering conditions and provenance.
Cathelineau (1986) stated the correlation between hydrothermal quartz dissolution in granites and sodium (albitization) or potassium (microclinization/sericitization) metasomatism.
Barker (1965) interpreted the different alkalic rock types in the Litchfield pluton to have been produced by differentiation of an initial nepheline syenite magma; furthermore, he suggested that, in places, country rock assimilation and metasomatism resulted in the late-stage textural and mineralogical variety observed within individual phases.
Adakite-like lavas from Antisana volcano (Ecuador): evidence for slab melt metasomatism beneath the Andean northern volcanic zone.
According to Wikipedia, "Synonyms to the word metasomatism are metasomatose and metasomatic process.
Evolution of diamond resorption in a silicic aqueous fluid at 1-3GPA: Application to kimberlite emplacement and mantle metasomatism.
2008), which suggests that metasomatism in the source mantle likely occurred shortly before alkaline melt generation (Orejana et al.