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Poldice Mine, St Day United Mines (Poldice Mines), St Day, Gwennap, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 14' 32'' North , 5° 9' 56'' West
Latitude & Longitude (decimal): 50.24231,-5.16582
GeoHash:G#: gbumf6q6e
UK National Grid Reference:SW743429
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate


An extensive area of dumps around prominent remains of calciner, chimney, and buddles. Active in the 17th century. Closed 1913. Dumps processed 1924-1929. Produced over 150,000 tons copper ore, 1,500 tons tin and 2,500 tons arsenic.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Poldice Mine

Regions containing this locality

Devon and Cornwall metalliferous mining district, England, UK

Mining District - 752 mineral species & varietal names listed

Camborne-Redruth and St Day Mining District, Cornwall, England, UK

Mining District - 257 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

19 valid minerals.

Detailed Mineral List:

Anatase
Formula: TiO2
Arsenopyrite
Formula: FeAsS
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, p. 416.
'Bitumen'
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
Brookite
Formula: TiO2
Cassiterite
Formula: SnO2
Reference: Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386; Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
Chalcopyrite
Formula: CuFeS2
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
'Chlorite Group'
Copper
Formula: Cu
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
Erythrite
Formula: Co3(AsO4)2 · 8H2O
Reference: Dale Foster Collection
Fluorite
Formula: CaF2
Reference: Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386
Galena
Formula: PbS
Reference: Hogg, T. (1825): A Manual of Mineralogy. Polyblank Publishers (London), p. 13; Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
Gypsum
Formula: CaSO4 · 2H2O
Molybdenite
Formula: MoS2
Reference: G.Curtis collection.
Pyrite
Formula: FeS2
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
Quartz
Formula: SiO2
Siderite
Formula: FeCO3
Spangolite
Formula: Cu6Al(SO4)(OH)12Cl · 3H2O
Reference: No reference listed
Sphalerite
Formula: ZnS
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, p. 416.
Sulphur ?
Formula: S8
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Reference: [Embrey & Symes, 1987, 50 - "Minerals of Cornwall and Devon"]
Titanite
Formula: CaTi(SiO4)O
Reference: Collection Richard De Nul
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
'Tungstic Ochre'
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
'Wolframite'
Formula: (Fe2+)WO4 to (Mn2+)WO4
Reference: Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386; Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Copper'1.AA.05Cu
'Sulphur' ?1.CC.05S8
Group 2 - Sulphides and Sulfosalts
'Arsenopyrite'2.EB.20FeAsS
'Chalcopyrite'2.CB.10aCuFeS2
'Galena'2.CD.10PbS
'Molybdenite'2.EA.30MoS2
'Pyrite'2.EB.05aFeS2
'Sphalerite'2.CB.05aZnS
'Tetrahedrite'2.GB.05Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 3 - Halides
'Fluorite'3.AB.25CaF2
Group 4 - Oxides and Hydroxides
'Anatase'4.DD.05TiO2
'Brookite'4.DD.10TiO2
'Cassiterite'4.DB.05SnO2
'Quartz'4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Siderite'5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Gypsum'7.CD.40CaSO4 · 2H2O
'Spangolite'7.DD.15Cu6Al(SO4)(OH)12Cl · 3H2O
Group 8 - Phosphates, Arsenates and Vanadates
'Erythrite'8.CE.40Co3(AsO4)2 · 8H2O
Group 9 - Silicates
'Titanite'9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
'Bitumen'-
'Chlorite Group'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
'Tungstic Ochre'-
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Semi-metals and non-metals
Sulphur ?1.3.5.1S8
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
3 <ø < 4
Tetrahedrite3.3.6.1Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 4 - SIMPLE OXIDES
AX2
Anatase4.4.4.1TiO2
Brookite4.4.5.1TiO2
Cassiterite4.4.1.5SnO2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Siderite14.1.1.3FeCO3
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)m(XO4)pZq·xH2O, where m:p > 6:1
Spangolite31.1.5.1Cu6Al(SO4)(OH)12Cl · 3H2O
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
A3(XO4)2·xH2O
Erythrite40.3.6.3Co3(AsO4)2 · 8H2O
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Bitumen'-
'Chlorite Group'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
'Tungstic Ochre'-
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals for each chemical element

HHydrogen
H ErythriteCo3(AsO4)2 · 8H2O
H GypsumCaSO4 · 2H2O
H SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
CCarbon
C SideriteFeCO3
OOxygen
O AnataseTiO2
O BrookiteTiO2
O CassiteriteSnO2
O ErythriteCo3(AsO4)2 · 8H2O
O GypsumCaSO4 · 2H2O
O QuartzSiO2
O SideriteFeCO3
O SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
O TitaniteCaTi(SiO4)O
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
FFluorine
F FluoriteCaF2
AlAluminium
Al SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
SiSilicon
Si QuartzSiO2
Si TitaniteCaTi(SiO4)O
SSulfur
S ArsenopyriteFeAsS
S ChalcopyriteCuFeS2
S GalenaPbS
S GypsumCaSO4 · 2H2O
S MolybdeniteMoS2
S PyriteFeS2
S SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
S SphaleriteZnS
S SulphurS8
S TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
ClChlorine
Cl SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
CaCalcium
Ca FluoriteCaF2
Ca GypsumCaSO4 · 2H2O
Ca TitaniteCaTi(SiO4)O
TiTitanium
Ti AnataseTiO2
Ti BrookiteTiO2
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
FeIron
Fe ArsenopyriteFeAsS
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe SideriteFeCO3
Fe TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
CoCobalt
Co ErythriteCo3(AsO4)2 · 8H2O
CuCopper
Cu ChalcopyriteCuFeS2
Cu CopperCu
Cu SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
Cu TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
ZnZinc
Zn SphaleriteZnS
Zn TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
AsArsenic
As ArsenopyriteFeAsS
As ErythriteCo3(AsO4)2 · 8H2O
MoMolybdenum
Mo MolybdeniteMoS2
SnTin
Sn CassiteriteSnO2
SbAntimony
Sb TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
WTungsten
W Wolframite(Fe2+)WO4 to (Mn2+)WO4
PbLead
Pb GalenaPbS

Geochronology

Geologic TimeRocks, Minerals and Events
Phanerozoic
 Paleozoic
  Permian
   Guadalupian
ⓘ Major polymetallic mineralization~270 MaCornwall, England, UK
   Cisuralian
ⓘ Porphyry dikes intruded (latest age)~275 MaCornwall, England, UK
ⓘ Greisenization (latest age)~280 MaCornwall, England, UK
ⓘ Porphyry dikes intruded (earliest age)~280 MaCornwall, England, UK
ⓘ Formation of metallized pegmatites~285 MaCornwall, England, UK
ⓘ Greisenization (earliest age)~285 MaCornwall, England, UK
ⓘ Emplacement of major plutons~295 MaCornwall, England, UK

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

Early Carboniferous
323.2 - 358.9 Ma



ID: 3192903
Paleozoic sedimentary rocks

Age: Mississippian (323.2 - 358.9 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]

Late Devonian
358.9 - 382.7 Ma



ID: 3135052
Late Devonian claystone

Age: Late Devonian (358.9 - 382.7 Ma)

Lithology: Claystone

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]

Middle Devonian
382.7 - 393.3 Ma



ID: 2035678
Middle Devonian (Undifferentiated)

Age: Middle Devonian (382.7 - 393.3 Ma)

Lithology: Mudstone, siltstone and sandstone

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

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

Localities in this Region
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