Vitriolic sinter
Chemical Process (Liquid-phase growth) - Ground surface
Required Geological Setting
Occurrence
A kind of hot spring sinters composed of sulfate minerals deposited from hot spring water. Sulfate ions dissolved in hot spring water deposits as baryte or gypsum by water temperature lowering or pH increasing. Baryte can deposit stably in the pH range between 1.0-3.0. Baryte may cotain Pb and few Ra, and called as Hokutolite, a variety name of baryte.
Reported Minerals
- Baryte
- Gypsum
Localities
- Tamagawa Hot Spring (Hokutolite)
- Kawarage (Pb bearing)
Related Occurrences
- Travertine (Calcareous sinter)
- Siliceous sinter
- Sulphur sinter
- Bog iron
- Vitriolic sinter
- Wad