Sulphur
Arakawa, Aomori city, Aomori pref., Japan
Source for sulphur and Sulphuric acid
Width: 20 mm. A sulphur crust. The dark yellow crust is sulphur. The surrounding gray host is tuff breccia subjected to alteration by volcanic gas.
Recovered from tuff breccia erupted from an explosion crater by a phreatic explosion, and subjected to alteration by volcanic gas near the explosion crator. Formed in less than 340 years.
Sulphur from this location was described in 1975.
Sulphur was formed by reacting H2S in volcanic gas with O2 in air:
2H2S + 3O2 = 2H2O + 2SO2
SO2 + 2H2S = 3S (Sulphur) + 2H2O
Other localities
- Iwo Jima (Fumarole, Pyramidal)
- Noboribetsu-Jigoku Valley (Fumarole, Pyramidal)
- Numajiri Mine (Fumarole, Massive)
- Jigoku Pond (Fumarole, Crust)
- Noboribetsu-Oyunuma Pond (Fumarole, Spherical)
- Niseko-Oyunuma Pond (Fumarole, Spherical)
- Kurokawa Mine (Mn skarn, Crust)
- Masutomi Mine (Hydrothermal, Massive)
- Takemori (Alpine fissure, Flaky)