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Laumontite-Albite zone

Chemical Process (Alteration) - Open system under ground (Alkaline metasomatism)

Correlated: Prehnite-Pumpellyite facies, Albite-Epidote-hornfels facies


Zeolite zone, Propylite zone

Index Minerals


Required Geological Setting

Metasomatic rocks (Alkaline)


Metasomatic zone formed by alkaline hydrothermal fluid of 200-250 degree associated with Basaltic magma activities. This alteration is a part of Zeolitization or Propylitization.

Laumontite-Albite zone

Distribution of Laumontite-Albite zones described in this site. Yellow lines are volcanic fronts.

Change of mineral assemblages

  • [ Extinct ] Heulandite, Analcime
  • [ Appear ] Laumontite, Albite, Adularia

Mineral Assemblages

  • [ Felsic Rocks ] Laumontite, Adularia, Calcite, (Yugawaralite)
  • [ Mafic Rocks ] Albite, Adularia, Calcite, (Yugawaralite)


Related Occurrences

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