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Britannia Mine (Snowdon Mine), Mt Snowdon, Gwynedd, Wales, UKi
Regional Level Types
Britannia Mine (Snowdon Mine)Mine
Mt SnowdonMountain
Gwynedd- not defined -
WalesCountry
UKCountry

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Latitude & Longitude (WGS84): 53° 4' 16'' North , 4° 3' 57'' West
Latitude & Longitude (decimal): 53.07128,-4.06600
GeoHash:G#: gcmjgmr4x
UK National Grid Reference:SH616547
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Llanberis1,844 (2017)6.7km
Deiniolen1,379 (2017)9.6km
Blaenau-Ffestiniog4,005 (2016)12.1km
Llanrug1,916 (2017)12.2km
Bethesda4,735 (2017)12.3km
Other/historical names associated with this locality:Caernarvonshire


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)

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
British IslesGroup of Islands
Snowdonia National Park, Wales, UKNational Park

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


14 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

Brochantite
Formula: Cu4(SO4)(OH)6
Reference: Amer.Min.(1985) 70, 411-413
Calcite
Formula: CaCO3
Reference: 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.
Chalcoalumite
Formula: CuAl4(SO4)(OH)12 · 3H2O
Reference: Amer.Min.(1985) 70, 411-413
Chalcopyrite
Formula: CuFeS2
Reference: No reference listed
Connellite
Formula: Cu19(SO4)(OH)32Cl4 · 3H2O
Reference: Mineralogical Magazine 1991 55 : 163-166
Georgeite
Formula: Cu2(CO3)(OH)2 · 6H2O
Description: Sneyd’s Level
Reference: Mineralogical Magazine 1991 55 : 163-166; Pollard, A.M., Thomas, R.G., Williams, P.A., Bevins, R.E. & Turgoose, S., 1989. Carbonatian connellite, a new variety, from the Britannia Mine, North Wales, and from the Botallack Mine, Cornwall. Journal of the Russell Society. 2 (2), 23-27.
Goethite
Formula: α-Fe3+O(OH)
Reference: Mineralogical Magazine 1991 55 : 163-166
Gypsum
Formula: CaSO4 · 2H2O
Reference: No reference listed
Lanthanite-(Ce) (TL)
Formula: (Ce,La,Nd)2(CO3)3 · 8H2O
Type Locality:
Reference: Amer.Min.(1985) 70, 411-413
Linarite
Formula: PbCu(SO4)(OH)2
Reference: BMS Collection
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Mineralogical Magazine 1991 55 : 163-166; Amer.Min.(1985) 70, 411-413
Marcasite
Formula: FeS2
Reference: Tim Colman collection
Posnjakite
Formula: Cu4(SO4)(OH)6 · H2O
Reference: Amer.Min.(1985) 70, 411-413
Pyrite
Formula: FeS2
Reference: Chris Popham Collection

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Marcasite2.EB.10aFeS2
Pyrite2.EB.05aFeS2
Group 3 - Halides
Connellite3.DA.25Cu19(SO4)(OH)32Cl4 · 3H2O
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Georgeite5.BA.10Cu2(CO3)(OH)2 · 6H2O
Lanthanite-(Ce) (TL)5.CC.25(Ce,La,Nd)2(CO3)3 · 8H2O
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Brochantite7.BB.25Cu4(SO4)(OH)6
Chalcoalumite7.DD.75CuAl4(SO4)(OH)12 · 3H2O
Gypsum7.CD.40CaSO4 · 2H2O
Linarite7.BC.65PbCu(SO4)(OH)2
Posnjakite7.DD.10Cu4(SO4)(OH)6 · H2O

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 15 - HYDRATED NORMAL CARBONATES
AmBn(XO3)p·xH2O, with (m+n):p < 1:1
Lanthanite-(Ce) (TL)15.4.2.3(Ce,La,Nd)2(CO3)3 · 8H2O
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Georgeite16a.3.3.1Cu2(CO3)(OH)2 · 6H2O
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)m(XO4)pZq, where m:p>2:1
Brochantite30.1.3.1Cu4(SO4)(OH)6
(AB)2(XO4)Zq
Linarite30.2.3.1PbCu(SO4)(OH)2
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)m(XO4)pZq·xH2O, where m:p > 6:1
Connellite31.1.1.1Cu19(SO4)(OH)32Cl4 · 3H2O
(AB)5(XO4)Zq·xH2O
Chalcoalumite31.3.1.1CuAl4(SO4)(OH)12 · 3H2O
(AB)4(XO4)Zq·xH2O
Posnjakite31.4.1.1Cu4(SO4)(OH)6 · H2O

List of minerals for each chemical element

HHydrogen
H Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2O
H LinaritePbCu(SO4)(OH)2
H BrochantiteCu4(SO4)(OH)6
H ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
H ConnelliteCu19(SO4)(OH)32Cl4 · 3H2O
H GeorgeiteCu2(CO3)(OH)2 · 6H2O
H GypsumCaSO4 · 2H2O
H MalachiteCu2(CO3)(OH)2
H PosnjakiteCu4(SO4)(OH)6 · H2O
H Goethiteα-Fe3+O(OH)
CCarbon
C Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2O
C GeorgeiteCu2(CO3)(OH)2 · 6H2O
C MalachiteCu2(CO3)(OH)2
C CalciteCaCO3
OOxygen
O Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2O
O LinaritePbCu(SO4)(OH)2
O BrochantiteCu4(SO4)(OH)6
O ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
O ConnelliteCu19(SO4)(OH)32Cl4 · 3H2O
O GeorgeiteCu2(CO3)(OH)2 · 6H2O
O GypsumCaSO4 · 2H2O
O MalachiteCu2(CO3)(OH)2
O PosnjakiteCu4(SO4)(OH)6 · H2O
O Goethiteα-Fe3+O(OH)
O CalciteCaCO3
AlAluminium
Al ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
SSulfur
S LinaritePbCu(SO4)(OH)2
S BrochantiteCu4(SO4)(OH)6
S ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
S ChalcopyriteCuFeS2
S ConnelliteCu19(SO4)(OH)32Cl4 · 3H2O
S GypsumCaSO4 · 2H2O
S PosnjakiteCu4(SO4)(OH)6 · H2O
S MarcasiteFeS2
S PyriteFeS2
ClChlorine
Cl ConnelliteCu19(SO4)(OH)32Cl4 · 3H2O
CaCalcium
Ca GypsumCaSO4 · 2H2O
Ca CalciteCaCO3
FeIron
Fe ChalcopyriteCuFeS2
Fe Goethiteα-Fe3+O(OH)
Fe MarcasiteFeS2
Fe PyriteFeS2
CuCopper
Cu LinaritePbCu(SO4)(OH)2
Cu BrochantiteCu4(SO4)(OH)6
Cu ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
Cu ChalcopyriteCuFeS2
Cu ConnelliteCu19(SO4)(OH)32Cl4 · 3H2O
Cu GeorgeiteCu2(CO3)(OH)2 · 6H2O
Cu MalachiteCu2(CO3)(OH)2
Cu PosnjakiteCu4(SO4)(OH)6 · H2O
CeCerium
Ce Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2O
PbLead
Pb LinaritePbCu(SO4)(OH)2

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Silurian
419.2 - 443.8 Ma



ID: 3185808
Paleozoic sedimentary rocks

Age: Silurian (419.2 - 443.8 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Ordovician
443.8 - 485.4 Ma



ID: 2033380
Unnamed Extrusive Rocks, Ordovician

Age: Ordovician (443.8 - 485.4 Ma)

Lithology: Felsic tuff

Reference: British Geological Survey. DiGMapGB-625. British Geological Survey ©NERC. [23]

Ordovician
443.8 - 485.4 Ma



ID: 3146372
Ordovician rhyolite

Age: Ordovician (443.8 - 485.4 Ma)

Lithology: Rhyolite group

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
- 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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