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Usu-zan, Iburi Province, Hokkaido Island, Japan

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Ref.: Katsui, Y., Oba, Y., Onuma, K., Suzuki, T., Kondo, Y., Watanabe, T., Niida, K., Uda, T., Hagiwara, S., Nagao, T., Nishikawa, J., Yamamoto, M., Ykeda, Y., Katagawa, H., Tsuchiya, N., Shirahase, M., Nemoto, S., Yokoyama, S., Soya, T., Fujita, T., Inaba, K., Koide, K. (1978a) Preliminary report of the ruption of the Usu volcano. Journal of the Facultyof Science, Hokkaido University, series IV: 18(3): 385-408.

Niida, K., Katsui, Y., Suzuki, T., Kondo, Y. (1980) The 1977-1978 erption of Usu volcano. Journal of the Faculty of Science, Hokkaido University: 19(3): 357-394.

Matsuo, S., Ossaka, J., Hirabayashi, J., Ozawa, T., and Kimishima, K. (1982) Chemical nature of volcanic gases of Usu volcano in Japan. Bulletin Volcanology: 45(3): 261-264.

Oba, Y., Katsui, Y., Kurasawa, H., Ikeda, Y., and Uda, T. (1983) Petrology of historic rhyolite and dacite from Usu volcano, North Japan. Journal of the Faculty of Science, Hokkaido University, series IV: 20: 275-290.

Fujimaki, H. (1986) Fractional crystallization of the basaltic suite of Usu volcano, southwest Hokkaido, Japan, and its relationships with the associated felsic site. Lithos: 19: 129-140.

Bernard, A. and Symonds, R.B. (1988) The specification of trace metals in high temperature gases from Usu volcano Japan. EOS, Transactions of the American Geophysical Unon: 69: 514.

Giggenbach, W.F. and Matsuo, S. (1991) vauation of results from Second and Third IAVCEI Field Workshops on Volcanic Gases Mt Usu, Japan, and White Island, New Zealand. Applied Geochemistry: 6: 125-141.

Africano, F. and Bernard, A. (2000) Acid alteration in the fumarolic environment of Usu volcano, Hokkaido, Japan. Journal of Volcanology and Geothermal Research: 97: 475-495.

Fumaroles on active dangerous volcano near Tohya lake in southwestern Hokkaido. A new parasitic cone, Showa-shinzan, erupted dacite lava from the southeast flank of Usu-zan in 1944-1945, emitting very high-temperature steam (over 800 C) consisting of water vapor, hydrogen, HF, HCL, boric acid. Fumarole gases here have the highest concentration of tin vapour (7ppm) of any volcano (Giggenbach & Matsuo, 1991).





 Map Reference: 42°32'N , 140°50'E

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Mineral list contains entries from the region specified including sub-localities


Mineral List:
  		•  'AHF'
    Al
     
    16
    		(F,OH)
     
    48
    		 · 12-15H
     
    2
    		O
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495.]
  		•  Alunite
    KAl
     
    3
    		[(OH)
     
    3
    		|SO
     
    4
    		]
     
    2
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495.]
  		•  Anhydrite
    CaSO
     
    4
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495.]
  		•  Aphthitalite
    (K,Na)
     
    3
    		Na(SO
     
    4
    		)
     
    2
    Reference: []
  		•  Arcanite
    K
     
    2
    		SO
     
    4
    Reference: []
  		•  Baryte
    BaSO
     
    4
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495.]
  		•  Bismuthinite
    Bi
     
    2
    		S
     
    3
    Reference: [Bernard, A. (1985), Thèse de doctorat, University Libre de Bruxelles; Africano & Beranrd (2000), Jour. Vlcanology & Geothermal Research: 97: 475-495.]
  		•  Carobbiite
    KF
    Reference: []
  		•  Cristobalite
    SiO
     
    2
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495.]
  		•  Galeite
    Na
     
    15
    		[F
     
    4
    		|Cl|(SO
     
    4
    		)
     
    5
    		]
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495; Oskarsson (1981), Jour. Volcanology & Geothermal Research: 10: 93-111.]
  		•  Galena
    PbS
    Reference: [Bernard, A. (1985), Thèse de doctorat, University Libre de Bruxelles; Africano & Beranrd (2000), Jour. Vlcanology & Geothermal Research: 97: 475-495.]
  		•  Greenockite
    CdS
    Reference: [Bernard, A. (1985), Thèse de doctorat, University Libre de Bruxelles; Africano & Beranrd (2000), Jour. Vlcanology & Geothermal Research: 97: 475-495.]
  		•  Gypsum
    Ca[SO
     
    4
    		] · 2H
     
    2
    		O
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495.]
  		•  Halite
    NaCl
    Reference: [Bernard, A. (1985), Thèse de doctorat, University Libre de Bruxelles; Africano & Beranrd (2000), Jour. Vlcanology & Geothermal Research: 97: 475-495.]
  		•  Hematite
    Fe
     
    2
    		O
     
    3
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495.]
  		•  Hypersthene
    (Fe,Mg)SiO
     
    3
    Reference: []
  		•  Pickeringite
    MgAl
     
    2
    		(SO
     
    4
    		)
     
    4
    		·22H
     
    2
    		O
    Reference: [Matsubara, S. et al (2002) Sublimates of Usu Volcano, Hokkaido, Japan (2002 annual meeting of Japanese Association of Mineralogists, Petrologists and Economic Geologists)]
  		•  Powellite
    Ca[MoO
     
    4
    		]
    Reference: [Bernard, A. (1985), Thèse de doctorat, University Libre de Bruxelles; Africano & Beranrd (2000), Jour. Vlcanology & Geothermal Research: 97: 475-495.]
  		•  Pyrite
    FeS
     
    2
    Reference: [Bernard, A. (1985), Thèse de doctorat, University Libre de Bruxelles; Africano & Beranrd (2000), Jour. Vlcanology & Geothermal Research: 97: 475-495.]
  		•  Quartz
    SiO
     
    2
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495.]
  		•  Ralstonite
    NaMgAl(F,OH)
     
    6
    		·H
     
    2
    		O
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495.]
  		•  Rheniite
    ReS
     
    2
    Reference: [Bernard & Dumortier (1986): Proceedings 11th International Conference Electron Microscopy, 1691-1692]
  		•  Sassolite
    H
     
    3
    		BO
     
    3
    Reference: [Okamoto collection (curated at the Geological Survey museum, Japan)]
  		•  'Silica'
    Reference: [Africano & Bernard (2000), Jour. Volcanology & Geothermal Research: 97: 475-495.]
  		•  Tamarugite
    NaAl(SO
     
    4
    		)
     
    2
    		·6H
     
    2
    		O
    Reference: [Matsubara, S. et al (2002) Sublimates of Usu Volcano, Hokkaido, Japan (2002 annual meeting of Japanese Association of Mineralogists, Petrologists and Economic Geologists)]
  		•  Tellurium
    Te
    Reference: [Bernard, A. (1985), Thèse de doctorat, University Libre de Bruxelles; Africano & Beranrd (2000), Jour. Vlcanology & Geothermal Research: 97: 475-495.]
  		•  Thenardite
    Na
     
    2
    		SO
     
    4
    Reference: []


    27 entries listed. 24 valid minerals.

    Localities in this Region:
    Japan
     
    • Hokkaido Island
      • Iburi Province
        • Usu-zan

    The above list 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!
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