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  1. A process of recrystallization of an igneous rock under conditions of falling temperature, attributed to the action of its own volatiles, e.g., serpentinization of peridotite or spilitization of basalt. AGI
  2. The alteration of an igneous rock by its own residual liquors. This process should rather be called deuteric because it is not considered to be metamorphic. See also: deuteric
    Source: Dictionary of Mining, Mineral, and Related Terms

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