Laumontite-Albite zone
Chemical Process (Alteration) - Open system under ground (Alkaline metasomatism)
Correlated: Prehnite-Pumpellyite facies, Albite-Epidote-hornfels facies
Synonym
Zeolite zone, Propylite zone
Index Minerals
Laumontite
Required Geological Setting
Occurrence
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.
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)
Localities
- Obora Path (Pillow lava)
- Sogaura (Pillow lava)
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)