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Britannia Mine (Snowdon Mine), Mt Snowdon, Gwynedd (Caernarvonshire), Wales, UK
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UK Grid Reference: SH616547
Latitude: 53°4'16"N
Longitude: 4°3'57"W
 
 
A copper mine, first mentioned around 1800, by the lake of Llyn Llydaw on the slopes of Mt Snowdon. The mine was worked intermittantly if rather unsuccessfully for over 100 years by a number of companies including the Snowdon and Dalawin Copper Mines (1847); Cwm Dyle Rock and Green Lake Copper Mining Company (1851); Cwmdyle Copper Mining Ltd (1857); Gt Snowden Copper Mining Company (1873); North Wales United Mines (1890); by perhaps the best known company, the Britannia Copper Mine Ltd (1898); and finally by the Penypass Copper Company (1915). The mine closed in 1916.

Some of the 8 levels remain, together with the remains of the Britannia mill and other buidings around the lake shore.
Further details, including a plan and section of the mine and underground black and white photos, are in Colman and Laffoley (1986)

Mineral List

Brochantite
Calcite
Chalcoalumite
Chalcopyrite
Connellite
Georgeite
Goethite
Gypsum
Lanthanite-(Ce) (TL)
Linarite
Malachite
Marcasite
Posnjakite
Pyrite


14 entries listed. 14 valid minerals. 1 type locality (valid mineral).

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References

- Colman, T B and Laffoley, N d'A. (1986): Brittania or Snowdon Mine. Bulletin Peak District Mines Historical Society, Vol. 9, No. 5, 313-331.
- Reedman, A J, Colman, T B, Campbell, S D G and Howells, M F. (1985): Volcanogenic mineralisation related to the Snowdon Volcanic Group (Ordovician), Gwynedd, North Wales. Journal Geological Society London, 142, 875-888.
- David Bick (2003): The Old Copper Mines of Snowdonia. 3rd Edition, xx pp.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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