A new volcano (volcanic dome) which appeared over the course of 10 months in 1943-1945, accompanied by earthquakes. Very high-temperature fumaroles.
Eruptions in 1977-78.
It is considered a parasitic cone of the close-by Mount Usu (Usu volcano).

"The peak is now 398 m (1,306 ft) tall, and still actively smoking." (Wikipedia)

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

25 valid minerals.

Detailed Mineral List:

ⓘ Alunite

Formula: KAl₃(SO₄)₂(OH)₆

References:

Africano, F, Bernard, A (2000) Acid alteration in the fumarolic environment of Usu volcano, Hokkaido, Japan. Journal of Volcanology and Geothermal Research, 97 (1) 475-495 doi:10.1016/s0377-0273(99)00162-6

ⓘ Anhydrite

Formula: CaSO₄

References:

ⓘ Aphthitalite

Formula: K₃Na(SO₄)₂

References:

Oana, Shinya (1962) Volcanic gases and sublimates from Showashinzan. Bulletin Volcanologique, 24 (1). 49-57 doi:10.1007/bf02599328

Akira Kato (1973) Sakurai Koubutsu Hyohon, 40.

ⓘ Arcanite

Formula: K₂SO₄

References:

The Mineral Species of Japan (5th ed) Matsubara

ⓘ Baryte

Formula: BaSO₄

References:

ⓘ Bismuthinite

Formula: Bi₂S₃

References:

Mizutani, Yoshihiko (1966) A Geochemical Study of the Fumarolic Bismuthinite from Showashinzan. Bulletin of the Chemical Society of Japan, 39 (3). 511-516 doi:10.1246/bcsj.39.511

ⓘ Carobbiite

Formula: KF

References:

Oana, Shinya (1962) Volcanic gases and sublimates from Showashinzan. Bulletin Volcanologique, 24 (1). 49-57 doi:10.1007/bf02599328(as "KF")

Matsubara, S. (2002) The Mineral Species of Japan. (116pp)

ⓘ Copiapite

Formula: Fe²⁺Fe³⁺₄(SO₄)₆(OH)₂ · 20H₂O

References:

ⓘ Cristobalite

Formula: SiO₂

References:

Oana, Shinya (1962) Volcanic gases and sublimates from Showashinzan. Bulletin Volcanologique, 24 (1). 49-57 doi:10.1007/bf02599328

ⓘ Galeite

Formula: Na₁₅(SO₄)₅F₄Cl

References:

ⓘ Galena

Formula: PbS

References:

ⓘ Greenockite

Formula: CdS

References:

ⓘ Gypsum

Formula: CaSO₄ · 2H₂O

References:

ⓘ Halite

Formula: NaCl

References:

ⓘ Hematite

Formula: Fe₂O₃

References:

Oana, Shinya (1962) Volcanic gases and sublimates from Showashinzan. Bulletin Volcanologique, 24 (1). 49-57 doi:10.1007/bf02599328

ⓘ Hydrokenoralstonite

Formula: Na_0.5(Al,Mg)₂(F,OH)₆ · H₂O

References:

ⓘ Native Tellurium

Formula: Te

References:

ⓘ Powellite

Formula: Ca(MoO₄)

References:

ⓘ Pyrite

Formula: FeS₂

References:

ⓘ Quartz

Formula: SiO₂

References:

Oana, Shinya (1962) Volcanic gases and sublimates from Showashinzan. Bulletin Volcanologique, 24 (1). 49-57 doi:10.1007/bf02599328

ⓘ Rheniite

Formula: ReS₂

References:

ⓘ Rutile

Formula: TiO₂

References:

ⓘ Sassolite

Formula: H₃BO₃

References:

(n.d.) Dr Yohachiro Okamoto collection, Geological Survey of Japan.

ⓘ Thénardite

Formula: Na₂SO₄

References:

Oana, Shinya (1962) Volcanic gases and sublimates from Showashinzan. Bulletin Volcanologique, 24 (1). 49-57 doi:10.1007/bf02599328

ⓘ Villiaumite

Formula: NaF

References:

Oana, Shinya (1962) Volcanic gases and sublimates from Showashinzan. Bulletin Volcanologique, 24 (1). 49-57 doi:10.1007/bf02599328(as "NaF")

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Tellurium	1.CC.10	Te
Group 2 - Sulphides and Sulfosalts
ⓘ	Greenockite	2.CB.45	CdS
ⓘ	Galena	2.CD.10	PbS
ⓘ	Bismuthinite	2.DB.05	Bi₂S₃
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Rheniite	2.EB.35	ReS₂
Group 3 - Halides
ⓘ	Carobbiite	3.AA.20	KF
ⓘ	Halite	3.AA.20	NaCl
ⓘ	Villiaumite	3.AA.20	NaF
ⓘ	Hydrokenoralstonite	3.CF.05	Na_0.5(Al,Mg)₂(F,OH)₆ · H₂O
Group 4 - Oxides and Hydroxides
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Cristobalite	4.DA.15	SiO₂
ⓘ	Rutile	4.DB.05	TiO₂
Group 6 - Borates
ⓘ	Sassolite	6.AA.05	H₃BO₃
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Aphthitalite	7.AC.35	K₃Na(SO₄)₂
ⓘ	Arcanite	7.AD.05	K₂SO₄
ⓘ	Thénardite	7.AD.25	Na₂SO₄
ⓘ	Anhydrite	7.AD.30	CaSO₄
ⓘ	Baryte	7.AD.35	BaSO₄
ⓘ	Alunite	7.BC.10	KAl₃(SO₄)₂(OH)₆
ⓘ	Galeite	7.BD.10	Na₁₅(SO₄)₅F₄Cl
ⓘ	Gypsum	7.CD.40	CaSO₄ · 2H₂O
ⓘ	Copiapite	7.DB.35	Fe²⁺Fe³⁺₄(SO₄)₆(OH)₂ · 20H₂O
ⓘ	Powellite	7.GA.05	Ca(MoO₄)

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
H	ⓘ Copiapite	Fe²⁺Fe₄³⁺(SO₄)₆(OH)₂ · 20H₂O
H	ⓘ Gypsum	CaSO₄ · 2H₂O
H	ⓘ Hydrokenoralstonite	Na_0.5(Al,Mg)₂(F,OH)₆ · H₂O
H	ⓘ Sassolite	H₃BO₃
B	Boron
B	ⓘ Sassolite	H₃BO₃
O	Oxygen
O	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
O	ⓘ Anhydrite	CaSO₄
O	ⓘ Aphthitalite	K₃Na(SO₄)₂
O	ⓘ Arcanite	K₂SO₄
O	ⓘ Baryte	BaSO₄
O	ⓘ Copiapite	Fe²⁺Fe₄³⁺(SO₄)₆(OH)₂ · 20H₂O
O	ⓘ Cristobalite	SiO₂
O	ⓘ Galeite	Na₁₅(SO₄)₅F₄Cl
O	ⓘ Gypsum	CaSO₄ · 2H₂O
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Powellite	Ca(MoO₄)
O	ⓘ Quartz	SiO₂
O	ⓘ Hydrokenoralstonite	Na_0.5(Al,Mg)₂(F,OH)₆ · H₂O
O	ⓘ Rutile	TiO₂
O	ⓘ Sassolite	H₃BO₃
O	ⓘ Thénardite	Na₂SO₄
F	Fluorine
F	ⓘ Carobbiite	KF
F	ⓘ Galeite	Na₁₅(SO₄)₅F₄Cl
F	ⓘ Hydrokenoralstonite	Na_0.5(Al,Mg)₂(F,OH)₆ · H₂O
F	ⓘ Villiaumite	NaF
Na	Sodium
Na	ⓘ Aphthitalite	K₃Na(SO₄)₂
Na	ⓘ Galeite	Na₁₅(SO₄)₅F₄Cl
Na	ⓘ Halite	NaCl
Na	ⓘ Hydrokenoralstonite	Na_0.5(Al,Mg)₂(F,OH)₆ · H₂O
Na	ⓘ Thénardite	Na₂SO₄
Na	ⓘ Villiaumite	NaF
Mg	Magnesium
Mg	ⓘ Hydrokenoralstonite	Na_0.5(Al,Mg)₂(F,OH)₆ · H₂O
Al	Aluminium
Al	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
Al	ⓘ Hydrokenoralstonite	Na_0.5(Al,Mg)₂(F,OH)₆ · H₂O
Si	Silicon
Si	ⓘ Cristobalite	SiO₂
Si	ⓘ Quartz	SiO₂
S	Sulfur
S	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
S	ⓘ Anhydrite	CaSO₄
S	ⓘ Aphthitalite	K₃Na(SO₄)₂
S	ⓘ Arcanite	K₂SO₄
S	ⓘ Baryte	BaSO₄
S	ⓘ Bismuthinite	Bi₂S₃
S	ⓘ Copiapite	Fe²⁺Fe₄³⁺(SO₄)₆(OH)₂ · 20H₂O
S	ⓘ Galeite	Na₁₅(SO₄)₅F₄Cl
S	ⓘ Galena	PbS
S	ⓘ Greenockite	CdS
S	ⓘ Gypsum	CaSO₄ · 2H₂O
S	ⓘ Pyrite	FeS₂
S	ⓘ Thénardite	Na₂SO₄
S	ⓘ Rheniite	ReS₂
Cl	Chlorine
Cl	ⓘ Galeite	Na₁₅(SO₄)₅F₄Cl
Cl	ⓘ Halite	NaCl
K	Potassium
K	ⓘ Alunite	KAl₃(SO₄)₂(OH)₆
K	ⓘ Aphthitalite	K₃Na(SO₄)₂
K	ⓘ Arcanite	K₂SO₄
K	ⓘ Carobbiite	KF
Ca	Calcium
Ca	ⓘ Anhydrite	CaSO₄
Ca	ⓘ Gypsum	CaSO₄ · 2H₂O
Ca	ⓘ Powellite	Ca(MoO₄)
Ti	Titanium
Ti	ⓘ Rutile	TiO₂
Fe	Iron
Fe	ⓘ Copiapite	Fe²⁺Fe₄³⁺(SO₄)₆(OH)₂ · 20H₂O
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Pyrite	FeS₂
Mo	Molybdenum
Mo	ⓘ Powellite	Ca(MoO₄)
Cd	Cadmium
Cd	ⓘ Greenockite	CdS
Te	Tellurium
Te	ⓘ Native Tellurium	Te
Ba	Barium
Ba	ⓘ Baryte	BaSO₄
Re	Rhenium
Re	ⓘ Rheniite	ReS₂
Pb	Lead
Pb	ⓘ Galena	PbS
Bi	Bismuth
Bi	ⓘ Bismuthinite	Bi₂S₃

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Sh%C5%8Dwa-shinzan

Other Regions, Features and Areas containing this locality

AsiaContinent

Eurasian Plate

North Japan ArcVolcanic Arc

Okhotsk PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Kato, Yoshio; Shoji, Rikii (1950) Prospecting of the underground structure of the new volcano “Showashinzan” by the seismic method. Bulletin Volcanologique, 10 (1). 129 doi:10.1007/bf02596081

Oana, Shinya (1962) Volcanic gases and sublimates from Showashinzan. Bulletin Volcanologique, 24 (1). 49-57 doi:10.1007/bf02599328

Mizutani, Yoshihiko (1966) A Geochemical Study of the Fumarolic Bismuthinite from Showashinzan. Bulletin of the Chemical Society of Japan, 39 (3). 511-516 doi:10.1246/bcsj.39.511

Mizutani, Yoshihiko (1970) Copper and zinc in fumarolic gases of Showashinzan volcano, Hokkaido, Japan. GEOCHEMICAL JOURNAL, 4 (2). 87-91 doi:10.2343/geochemj.4.87

Mizutani, Yoshihiko (1978) Isotopic compositions of volcanic steam from Showashinzan Volcano, Hokkaido, Japan. GEOCHEMICAL JOURNAL, 12 (1) 57-63 doi:10.2343/geochemj.12.57

Mizutani, Yoshihiko, Sugiura, Tsutomu (1982) Variations in chemical and isotopic compositions of fumarolic gases from Showashinzan volcano, Hokkaido, Japan. GEOCHEMICAL JOURNAL, 16 (2) 63-71 doi:10.2343/geochemj.16.63

Giggenbach, W.F., Matsuo, S. (1991) Evaluation of results from Second and Third IAVCEI Field Workshops on Volcanic Gases, Mt Usu, Japan, and White Island, New Zealand. Applied Geochemistry, 6 (2) 125-141 doi:10.1016/0883-2927(91)90024-j

en.wikipedia.org (n.d.) https://en.wikipedia.org/wiki/Sh%C5%8Dwa-shinzan

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