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Related to metasomatic: Altered igneous rock


 (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.


1. (Geological Science) geology relating to metasomatism
2. (Zoology) zoology relating to a metasoma
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References in periodicals archive ?
According to Wikipedia, "Synonyms to the word metasomatism are metasomatose and metasomatic process.
At Bjorkdal, we are focused on rebuilding the fundamental geological understanding of the mineralizing system, which increasingly appears to be contact metasomatic in origin, with multiple newly-recognized vein orientations.
Though the ascension is a metaempirical event, it does not imply for the ascended Jesus a metasomatic or disincamate state" (59-60).
A-Hydrothermal Metasomatic deposits in carbonate and dolomitic rocks: Through this process mechanism, when hydrothermal solutions penetrate into the dolomitic rocks, because the ionic radius of calcium is about 36 % bigger than that of the Magnesium, these two elements therefore cannot replace one another isomorphically; however because the Iron ionic radius is not so much different from that of the Magnesium, a series of isomorphic minerals like Magnesite, Hontite, Bronzitite and etc.
4% Cu and 75g/t Ag; narrow high-grade quartz veins up to 1m grading 33g/t Au, as well as high-grade metasomatic replacements up to 2m grading 15g/t Au and 60g/t Ag.
The incompatible element enrichment could reflect a recent metasomatic event in a depleted mantle source, and the small difference in [sup.
Regional metasomatic dolomitization associated with tectonic disturbances in Lower Paleozoic of the Northern Baltic region.
Recent drilling at Pakrut intersected metasomatic mineralization to the South
Re-Os ages for Archean molybdenite and pyrite, Kuittila-Kivisuo, Finland, and Proterozoic molybdenite, Kabeliai, Lithuania: testing the chronometer in a metamorphic and metasomatic setting // Mineral.
Most of them are probably of metasomatic or anatectic origin (S-type granites; Niin 1997).
We believe the most likely cause of this alteration is the heat and/or metasomatic fluid associated with the final major phase of Mesoproterozoic igneous activity involved in formation of the St.