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Heulandite-Analcime zone

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

Correlated: High-T zeolite facies


Zeolite zone

Index Minerals

Heulandite, Analcime

Required Geological Setting

Metasomatic rocks (Alkaline)


Metasomatic zone formed by alkaline hydrothermal fluid of 100-200 degree associated with Basaltic magma activities. This alteration is a part of Zeolitization.

Heulandite-Analcime zone

Distribution of heulandite-Analcime zones described in this site. Yellow lines are volcanic fronts.

Change of mineral assemblages

  • [ Extinct ] Stilbite, Mordenite, Chabazite
  • [ Appear ] Heulandite, Analcime

Mineral Assemblages

  • [ Felsic Rocks ] Heulandite, Calcite, (Dolomite)
  • [ Mafic Rocks ] Analcime, Calcite, (Dolomite)


Related Occurrences

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