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Shachang Fe deposit, Miyun Co., Beijing Municipality, China

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Banded iron formation (BIF), hosted in the Shachang Formation of the Archean Miyun Group, a sequence of biotite-pyroxene granulite intercalated with amphibolitic granulite. There are four members in the formation: A, B, C and D. The middle part of Member C consists of amphibolic pyroxene plagioclase gneiss and pyroxene plagioclase gneiss and contains two iron-bearing layers with more than 50 orebodies, that are up to 780 m long and up to 93 m thick. The bodies are stratiform, lenticular and lensoid; swelling, pinching out, branching and mingling along the strike and dip directions are very common. The mineral textures are hypidiomorphic or xenomorphic granular and granoblastic; the structures are banded, laminated, gneissic and massive.

Ref.:
- http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt





 Map Reference: 40°25'40"N , 117°0'0"E

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Mineral List:
  		•  'Albite-Anorthite Series'
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Almandine
    Fe
    2+
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Baryte
    BaSO
     
    4
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Biotite
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Calcite
    CaCO
     
    3
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Chalcopyrite
    CuFeS
     
    2
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  'Chlorite Group'
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  'Clinopyroxene Subgroup'
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Epidote
    {Ca
     
    2
    		}{Al
     
    2
    		Fe
    3+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Hematite
    Fe
     
    2
    		O
     
    3
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Hematite
    var: Martite
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  'Hornblende'
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  'K Feldspar'
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Limonite
    FeO(OH)·nH
     
    2
    		O
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Magnetite
    Fe
    2+
     
    		Fe
    3+
    2
    		O
     
    4
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  'Orthopyroxene Subgroup'
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Pyrite
    FeS
     
    2
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Quartz
    SiO
     
    2
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Rutile
    TiO
     
    2
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  'Sericite'
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]
  		•  Zircon
    Zr[SiO
     
    4
    		]
    Reference: [http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt]


    21 entries listed. 11 valid minerals.

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