metasomatism

(redirected from metasomatizing)
Also found in: Encyclopedia.
Related to metasomatizing: Metasomatic Rocks, Altered igneous rock

met·a·so·ma·tism

 (mĕt′ə-sō′mə-tĭz′əm) also met·a·so·ma·to·sis (-sō′mə-tō′sĭs)
n.
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.

metasomatism

(ˌmɛtəˈsəʊməˌtɪzəm) or

metasomatosis

n
(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-]

met•a•so•ma•tism

(ˌmɛt əˈsoʊ məˌtɪz əm)

also met•a•so•ma•to•sis

(-ˌsoʊ məˈtoʊ sɪs)

n.
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.
[1885–90]
met`a•so•mat′ic (-ˈmæt ɪk) adj.

metasomatism

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
Mentioned in ?
References in periodicals archive ?
There is also evidence of large-scale metasomatism before the quartz monzonite porphyry magma was completely crystallized, suggesting that the metasomatizing fluids were not all from the residuum of crystallization (Burnham, 1954).
Trace-element systematics suggest derivation from a mantle source that was enriched in HFSE compared to normal MORB, prior to introduction of Th and LILE via metasomatizing fluids from the subducting slab.