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Ioi Mine, Shiga Prefecture, Kinki Region, Honshu Island, Japan

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Metamorphosed sedimentary manganese ores, parallel to bedding in Paleozoic meta-chert. A granitic batholith outcrops 3 km east of the mine, and may be related to the regional metamorphism.





Mineral List:
  		•  'Adularia'
    KAlSi
     
    3
    		O
     
    8
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Alabandite
    Mn
    2+
     
    		S
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956); Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.]
  		•  Albite
    Na[AlSi
     
    3
    		O
     
    8
    		]
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Alleghanyite ?
    Mn
    2+
    5
    		[(OH)
     
    2
    		|(SiO
     
    4
    		)
     
    2
    		]
    Description: (Some of the material reported as "alleghanyite" from here turned out to be sonolite, and so other alleged alleghanyites should be reanalyzed.)
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956); Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.]
  		•  'Amphibole Group'
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Arsenopyrite
    FeAsS - (Fe
     
    0.90
    		Co
     
    0.10
    		)AsS
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Baryte
    BaSO
     
    4
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Bementite
    Mn
     
    5
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    6
    Reference: [Lee, D. E. (1955); Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.]
  		•  Birnessite
    (Na,Ca)
     
    0.5
    		(Mn
    4+
     
    		,Mn
    3+
     
    		)
     
    2
    		O
     
    4
    		 · 1.5H
     
    2
    		O
    Reference: [Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 58]
  		•  'Chlorite Group'
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Galaxite
    (Mn,Fe,Mg)(Al,Fe)
     
    2
    		O
     
    4
    Reference: [Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.]
  		•  'Garnet Group'
    X
     
    3
    		Z
     
    2
    		(TO
     
    4
    		)
     
    3
    		 (X = Ca, Fe, etc·, Z = Al, Cr, etc·, T = Si, As, V)
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Hausmannite
    MnMn
     
    2
    		O
     
    4
    Reference: [Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.]
  		•  Jacobsite
    Mn
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: [Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.]
  		•  Manganosite
    MnO
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956); Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.]
  		•  Marcasite
    FeS
     
    2
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  'Mica Group'
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Neotocite
    (Mn,Fe,Mg)SiO
     
    3
    		·H
     
    2
    		O
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Pyrochroite
    Mn(OH)
     
    2
    Reference: [No reference listed]
  		•  Pyrrhotite
    Fe
     
    7
    		S
     
    8
    		, (-4M), also given as Fe
     
    1-x
    		S (x = 0 - 0.2)
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Quartz
    SiO
     
    2
    Reference: [Symposium sobre yacimientos de manganeso, Tomo IV, Mexico (1956)]
  		•  Quartz
    var: Chert
    Reference: [Mayumi Yoshinaga (1963) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 14, 1, 1-22.]
  		•  Rhodochrosite
    MnCO
     
    3
    Reference: [Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.]
  		•  Rhodonite
    MnSiO
     
    3
    Reference: [Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.]
  		•  Shigaite (TL)
    Al
     
    4
    		Mn
     
    7
    		(SO
     
    4
    		)
     
    2
    		(OH)
     
    22
    		·8H
     
    2
    		O
    Type Locality: Ioi Mine, Shiga Prefecture, Kinki Region, Honshu Island, Japan
    Reference: [N.Jahrb.Min.,Mh.(1985) 453-457]
  		•  Sonolite
    Mn
    2+
    9
    		[(OH,F)
     
    2
    		|(SiO
     
    4
    		)
     
    4
    		]
    Reference: []
  		•  Spessartine
    Mn
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: [Katsu Kaneko (1956) Symposium del Manganeso, XX Congreso Geologico Internacional, Mexico D.F.]
  		•  Tephroite
    Mn
    2+
    2
    		[SiO
     
    4
    		]
    Reference: [Mayumi Yoshinaga (1963) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 14, 1, 1-22.; Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.]


    28 entries listed. 22 valid minerals. 1 type locality (valid mineral).

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