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Cligga Head, Perranzabuloe, St Agnes District, Cornwall, England, UK

Granite-related mineralization.
Cligga Head granite is intruded in Devonian metasediments.
The granite is cut by greisens-bordered NE vein-system.
The greisens are cored by Sn-W-As-quartz veins.
Sulfide mineralization occurs in fractures crosscutting Sn-W-As-quartz veins.
The granite is rimmed by a tourmalinite alteration aureole.
Hydrothermal activity : 350-400 °C, 0.7 (boiling)-1.7 kb.
Na-K-Fe-Ca chloride brines rich in B, F, SO4 (degassing of magmatic volatiles).

This locality includes
- the Cligga Mine,
- the exposure of the greissen-sheet vein stockworks (another SSSI, so hammers in bags!), located just below the 1940's mine works on the top of the cliff, and
- the beach, with numerous vein outcrops and scattered material from the mine and its dumps

The beach at the entrance to the mine yields arsenopyrite, wolframite, and cassiterite without having to look too hard. More cassiterites are easily found on the beach around the cliff past the mine entrance, which can be accessed at low tide.





UK OS Grid Reference: SW737536
Map Reference: 50°20'17"N , 5°10'50"W

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


Mineral List:
'Agardite'
Andalusite
'Apatite'
Arsenopyrite
Arthurite
Bismuth
Bismuthinite
Bornite
Botallackite
Brochantite
Cassiterite
Chalcopyrite
Connellite
Copper
Cuprite
Erythrite
Euclase
Ferrokësterite (TL)
Goethite
Kësterite
Lavendulan
Libethenite
Limonite
Löllingite
Metatorbernite ?
Metazeunerite
Molybdenite
Muscovite
Paratacamite
Pharmacosiderite
Phenakite
Pyrite
Quartz
Scorodite
'Sericite'
Stannite
Stannoidite
Topaz
'Tourmaline'
Varlamoffite
Wolframite
Zinnwaldite


56 entries listed. 34 valid minerals. 1 type locality (valid mineral).

Localities in this Region:
UK
 
  • England
    • Cornwall
      • St Agnes District
        • Perranzabuloe
          • Cligga Head

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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