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Recrystallization (geology)

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In geology, solid-state recrystallization is a metamorphic process that occurs under high temperatures and pressures where atoms of minerals are reorganized by diffusion and/or dislocation glide. During this process, the physical structure of the minerals is altered while the composition remains unchanged.[1][2] This is in contrast to metasomatism, which is the chemical alteration of a rock by hydrothermal and other fluids.

Solid-state recrystallization can be illustrated by observing how snow recrystallizes to ice. When snow is subjected to varying temperatures and pressures, individual snowflakes undergo a physical transformation but their composition remains the same. Limestone is a sedimentary rock that undergoes metamorphic recrystallization to form marble, and clays can recrystallize to muscovite mica.

References

  1. ^ "Metamorphic rock | Definition, Formation, & Facts | Britannica". www.britannica.com. 2024-10-07. Retrieved 2024-11-22.
  2. ^ Drury, Martyn R.; Urai, Janos L. (1990). "Deformation-related recrystallization processes". Tectonophysics. 172 (3–4): 235–253. doi:10.1016/0040-1951(90)90033-5.