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Chromdiopside gabbroic granulite layer, Horoman peridotite body, Samani-cho, Samani-gun, Hidaka Province, Hokkaido Island, Japan

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Ref.: E. Takazawa et al. , Journal of Petrology, V 40, N 12, December 1999, pp. 1827-1851.

Type II layer : Chromdiopside mafic gabbroic granulites (plagioclase-rich cumulates of the upper mantle) (age : 830 Ma).
These mafic layers (mm to m thickness scale) are parallel to foliation plane of the peridotites.
The assemblages are due to subsolidus reaction.





Mineral List:
  		•  'Albite-Anorthite Series'
    Reference: [E. Takazawa et al. , Journal of Petrology, V 40, N 12, December 1999, pp. 1827-1851.]
  		•  'Clinopyroxene Subgroup'
    Reference: [E. Takazawa et al. , Journal of Petrology, V 40, N 12, December 1999, pp. 1827-1851.]
  		•  Diopside
    var: Chromian Diopside
    (Ca,Cr)MgSi
     
    2
    		O
     
    6
    Reference: [E. Takazawa et al. , Journal of Petrology, V 40, N 12, December 1999, pp. 1827-1851.]
  		•  Forsterite
    Mg
     
    2
    		[SiO
     
    4
    		]
    Reference: [E. Takazawa et al. , Journal of Petrology, V 40, N 12, December 1999, pp. 1827-1851.]
  		•  Magnetite
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: [E. Takazawa et al. , Journal of Petrology, V 40, N 12, December 1999, pp. 1827-1851.]
  		•  'Orthopyroxene Subgroup'
    Reference: [E. Takazawa et al. , Journal of Petrology, V 40, N 12, December 1999, pp. 1827-1851.]
  		•  Pargasite
    [Na][Ca
     
    2
    		][Mg
     
    4
    		Al][(OH)
     
    2
    		|Al
     
    2
    		Si
     
    6
    		O
     
    22
    		]
    Reference: [E. Takazawa et al. , Journal of Petrology, V 40, N 12, December 1999, pp. 1827-1851.]
  		•  Spinel
    MgAl
     
    2
    		O
     
    4
    Colour: Green.
    Reference: [E. Takazawa et al. , Journal of Petrology, V 40, N 12, December 1999, pp. 1827-1851.]


    8 entries listed. 4 valid minerals.

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