metasomatize

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English

Verb

metasomatize (third-person singular simple present metasomatizes, present participle metasomatizing, simple past and past participle metasomatized)

  1. (geology, transitive) To change the bulk chemical composition of a rock is by the introduction of components from an external source, especially by a hydrothermal fluid.
    • 1999, James W. Vallance, Postglacial lahars and potential hazards in the White Salmon River system on the Southwest Flank of Mound Adams, Washington:
      In some way, not clearly understood, hydrothermal action metasomatizes the original andesite without destroying original textures or changing volumes.