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Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK

An abandoned open-cast tungsten mine near Plymouth in Devon - this locality is famed for its high quality scorodite (among the best in Europe) and cassiterite.

Aerial View (Click for Details)


On 4th December 2007 it was announced that an Australian company, Wolf Minerals LLC, had acquired the rights to mine this deposit, and current plans are to reopen the site as a full-scale opencast metal mine for tungsten and tin, producing up to 3000 tonnes of tungsten metal per year.
The mine is scheduled to resume production of tungsten and tin in 2010.

The original name for the workings was "Hemerdon Bal", this was corrupted over time (possibly due to a mis-spelling on Ordnance Survey maps that remains to this day) to "Hemerdon Ball". The current owners refer to the deposit just as the "Hemerdon Mine".







UK OS Grid Reference: SX572584
Map Reference: 50°24'26"N , 4°0'35"W

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Mineral List:
  • Alumotungstite
    (W,Al)(O,OH)
     
    3
    Reference: []
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Steve Rust
  • Arsenopyrite
    FeAsS - (Fe
     
    0.90
    Co
     
    0.10
    )AsS
    Reference: [No reference listed]
  • Cassiterite
    SnO
     
    2
    Reference: [Mineralogical Record (2001) 32:249]
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Chris Popham
  • Ferberite
    FeWO
     
    4
    Reference: []
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
     
  • Ferritungstite
    (W,Fe
    3+
     
    )(O,OH)
     
    3
    Reference: []
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Steve Rust
  • Goethite
    α-Fe
    3+
     
    O(OH)
    Reference: []
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Richard de Nul
  • Hematite
    Fe
     
    2
    O
     
    3
    Reference: [No reference listed]
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Chris Popham
  • Lepidocrocite
    γ-Fe
    3+
     
    O(OH)
    Description: small group of black mm-sized crystals, the thinnest crystals seen to be yellow under the microscope
    Reference: [identified byTom Cotterell at the National Museum of Wales]
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Richard de Nul
  • Malachite
    Cu
     
    2
    [(OH)
     
    2
    |CO
     
    3
    ]
    Reference: [Collection Richard De Nul]
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Richard De Nul
  • Pharmacosiderite
    KFe
    3+
    4
    [(OH)
     
    4
    |(AsO
     
    4
    )
     
    3
    ] · 6-7H
     
    2
    O
    Reference: [Mineralogical Record (2001) 32:249]
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © De Nul, Richard
  • Quartz
    SiO
     
    2
    Reference: [P Haas collection; Mineralogical Record (2001) 32:249]
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Richard De Nul
  • Russellite
    (BiO)
     
    2
    [WO
     
    4
    ]
    Reference: [Mineralogical Record (2001) 32:249]
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Steve Rust
  • Scorodite
    Fe
    3+
     
    AsO
     
    4
    ·2H
     
    2
    O
    Reference: [Mineralogical Record (2001) 32:249]
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Steve Rust
  • 'Tourmaline'
    AD
     
    3
    G
     
    6
    (BO
     
    3
    )
     
    3
    [T
     
    6
    O
     
    18
    ]Y
     
    3
    Z
    Reference: [No reference listed]
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © De Nul, Richard
  • Wolframite
    (Fe
    2+
     
    )WO
     
    4
     
     
    to (Mn
    2+
     
    )WO
     
    4
    Reference: [No reference listed]
    Site Photo
    Hemerdon Mine (Hemerdon Bal Mine; Hemerdon Ball Mine), Plympton, Tavistock District, Devon, England, UK
    © Richard De Nul


    15 entries listed. 13 valid minerals.

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