Heulandite-Analcime zone
Chemical Process (Alteration) - Open system under ground (Alkaline metasomatism)
Correlated: High-T zeolite facies
Synonym
Zeolite zone
Index Minerals
Heulandite, Analcime
Required Geological Setting
Occurrence
Metasomatic zone formed by alkaline hydrothermal fluid of 100-200 degree associated with Basaltic magma activities. This alteration is a part of Zeolitization.
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)
Localities
Related Occurrences
- Halloysite zone (Alunite zone, Argillized zone)
- Kaolinite zone (Alunite zone, Argillized zone)
- Minamiite-Alunite zone (Alunite zone)
- Pyrophyllite zone
- Smectite zone (Argillized zone)
- Interstratified mineral zone (Argillized zone)
- Illite-Chlorite zone (Propylite zone)
- Epidote-Actinolite zone
- Stilbite-Mordenite zone (Zeolite zone)
- Heulandite-Analcime zone (Zeolite zone)
- Laumontite-Albite zone (Zeolite z., Propylite z.)
- Wairakite-Albite zone (Zeolite zone)