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St Day United Mines (Poldice Mines), St Day, Gwennap, Cornwall, England, UKi
Regional Level Types
St Day United Mines (Poldice Mines)Group of Mines
St DayVillage
GwennapCivil Parish
CornwallCounty
EnglandConstituent Country
UKCountry

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Latitude & Longitude (WGS84):
50° 14' 16'' North , 5° 10' 28'' West
Latitude & Longitude (decimal):
50.23785,-5.17470
GeoHash:
G#: gbumf1xbs
GRN:
N34W03
Type:
Group of Mines
KΓΆppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
St. Day700 (2011)0.8km
Chacewater1,226 (2017)2.4km
Redruth42,690 (2017)3.6km
North Country773 (2017)4.6km
Perranwell1,207 (2017)4.7km
Mindat Locality ID:
194315
Long-form identifier:
mindat:1:2:194315:6
GUID (UUID V4):
a7ae923d-3d6b-44a7-8604-b8f99b3643b6


The name St Day United Mines was given to Poldice Mine and Carharrack Mine following an amalgamation in 1852.

In 1864, Wheal Unity, Wheal Gorland and Creegbrawse and Penkevil were added to this amalgamation. Subsequently in 1870 the group name was changed to Poldice Mines. Wheal Maid is also stated to have formed part of the group, probably as a result of working in conjunction with Carharrack Mine, which adjoins Wheal Maid's south-western boundary.

The initial name of the amalgamation is based upon the principal village in the area and has no relevance to the parish boundaries, hence most of the mines are located in Gwennap parish, except for Wheal Gorland (in St Day parish) and Creegbrawse and Penkevil Mine (in Chacewater parish).

Since the amalgamation between 1852-93 the outputs given under St Day United or Poldice Mines are: 22,900 tons of 6% copper ore, 3280 tons of black tin, 124 tons of mispickel (arsenic ore) and 49 tons of fluorspar.

Not to be mistaken for the Gwennap United Mines.

From a mineral location perspective, unless no other information is available, specimens should be assigned to the individual mines rather than the group designation.

Edited by Dale Foster
Delete this entry - duplicate page.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

21 valid minerals.

Detailed Mineral List:

β“˜ Anatase
Formula: TiO2
β“˜ Arsenopyrite
Formula: FeAsS
β“˜ Brookite
Formula: TiO2
β“˜ Cassiterite
Formula: SnO2
β“˜ Chalcopyrite
Formula: CuFeS2
β“˜ 'Chlorite Group'
β“˜ Copper
Formula: Cu
β“˜ Erythrite
Formula: Co3(AsO4)2 · 8H2O
β“˜ Fluorite
Formula: CaF2
β“˜ Galena
Formula: PbS
β“˜ Gypsum
Formula: CaSO4 · 2H2O
β“˜ Molybdenite
Formula: MoS2
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ 'Petroleum'
β“˜ 'Petroleum var. Bitumen'
β“˜ Phenakite
Formula: Be2SiO4
β“˜ Pseudomalachite
Formula: Cu5(PO4)2(OH)4
β“˜ Pyrite
Formula: FeS2
β“˜ Quartz
Formula: SiO2
β“˜ Siderite
Formula: FeCO3
β“˜ Spangolite
Formula: Cu6Al(SO4)(OH)12Cl · 3H2O
β“˜ Sphalerite
Formula: ZnS
β“˜ Sulphur ?
Formula: S8
β“˜ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S
β“˜ Titanite
Formula: CaTi(SiO4)O
β“˜ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
β“˜ 'Tungstic Ochre'
β“˜ 'Wolframite Group'

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Copper1.AA.05Cu
β“˜Sulphur ?1.CC.05S8
Group 2 - Sulphides and Sulfosalts
β“˜Sphalerite2.CB.05aZnS
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Galena2.CD.10PbS
β“˜Molybdenite2.EA.30MoS2
β“˜Pyrite2.EB.05aFeS2
β“˜Arsenopyrite2.EB.20FeAsS
β“˜'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
Group 3 - Halides
β“˜Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
β“˜Cassiterite4.DB.05SnO2
β“˜'Wolframite Group'4.DB.30 va
β“˜Anatase4.DD.05TiO2
β“˜Brookite4.DD.10TiO2
Group 5 - Nitrates and Carbonates
β“˜Siderite5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Gypsum7.CD.40CaSO4 Β· 2H2O
β“˜Spangolite7.DD.15Cu6Al(SO4)(OH)12Cl Β· 3H2O
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Pseudomalachite8.BD.05Cu5(PO4)2(OH)4
β“˜Erythrite8.CE.40Co3(AsO4)2 Β· 8H2O
Group 9 - Silicates
β“˜Phenakite9.AA.05Be2SiO4
β“˜Titanite9.AG.15CaTi(SiO4)O
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
β“˜'Chlorite Group'-
β“˜'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
β“˜'Tungstic Ochre'-
β“˜'Petroleum
var. Bitumen'		-
β“˜''-

List of minerals for each chemical element

HHydrogen
Hβ“˜ ErythriteCo3(AsO4)2 · 8H2O
Hβ“˜ GypsumCaSO4 · 2H2O
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ PseudomalachiteCu5(PO4)2(OH)4
Hβ“˜ SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
BeBeryllium
Beβ“˜ PhenakiteBe2SiO4
BBoron
Bβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
CCarbon
Cβ“˜ SideriteFeCO3
OOxygen
Oβ“˜ AnataseTiO2
Oβ“˜ BrookiteTiO2
Oβ“˜ CassiteriteSnO2
Oβ“˜ ErythriteCo3(AsO4)2 · 8H2O
Oβ“˜ GypsumCaSO4 · 2H2O
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ PhenakiteBe2SiO4
Oβ“˜ PseudomalachiteCu5(PO4)2(OH)4
Oβ“˜ QuartzSiO2
Oβ“˜ SideriteFeCO3
Oβ“˜ SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
Oβ“˜ TitaniteCaTi(SiO4)O
Oβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
FFluorine
Fβ“˜ FluoriteCaF2
AlAluminium
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
SiSilicon
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ PhenakiteBe2SiO4
Siβ“˜ QuartzSiO2
Siβ“˜ TitaniteCaTi(SiO4)O
PPhosphorus
Pβ“˜ PseudomalachiteCu5(PO4)2(OH)4
SSulfur
Sβ“˜ ArsenopyriteFeAsS
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ GalenaPbS
Sβ“˜ GypsumCaSO4 · 2H2O
Sβ“˜ MolybdeniteMoS2
Sβ“˜ PyriteFeS2
Sβ“˜ SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
Sβ“˜ SphaleriteZnS
Sβ“˜ SulphurS8
Sβ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ClChlorine
Clβ“˜ SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
KPotassium
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ FluoriteCaF2
Caβ“˜ GypsumCaSO4 · 2H2O
Caβ“˜ TitaniteCaTi(SiO4)O
TiTitanium
Tiβ“˜ AnataseTiO2
Tiβ“˜ BrookiteTiO2
Tiβ“˜ TitaniteCaTi(SiO4)O
FeIron
Feβ“˜ ArsenopyriteFeAsS
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ PyriteFeS2
Feβ“˜ SideriteFeCO3
CoCobalt
Coβ“˜ ErythriteCo3(AsO4)2 · 8H2O
CuCopper
Cuβ“˜ ChalcopyriteCuFeS2
Cuβ“˜ CopperCu
Cuβ“˜ PseudomalachiteCu5(PO4)2(OH)4
Cuβ“˜ SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
Cuβ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ZnZinc
Znβ“˜ SphaleriteZnS
AsArsenic
Asβ“˜ ArsenopyriteFeAsS
Asβ“˜ ErythriteCo3(AsO4)2 · 8H2O
MoMolybdenum
Moβ“˜ MolybdeniteMoS2
SnTin
Snβ“˜ CassiteriteSnO2
SbAntimony
Sbβ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
PbLead
Pbβ“˜ GalenaPbS

Geochronology

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

Localities in this Region

UK

Other Regions, Features and Areas containing this locality

British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
EuropeContinent
UK

This page 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. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Russell, Arthur (1911) On the occurrence of Phenacite in Cornwall. Mineralogical Magazine and Journal of the Mineralogical Society, 16 (73) 55-62 doi:10.1180/minmag.1911.016.073.08
Russell, Arthur (1920) On the occurrence of Phenacite and Scheelite at Wheal Cock, St. Just, Cornwall. Mineralogical Magazine and Journal of the Mineralogical Society, 19 (88) 19-22 doi:10.1180/minmag.1920.019.88.06
Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.
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