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South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UKi
Regional Level Types
South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine)Mine
St Stephen-in-Brannel- not defined -
CornwallCounty
EnglandConstituent Country
UKCountry

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Latitude & Longitude (WGS84): 50° 20' 3'' North , 4° 54' 6'' West
Latitude & Longitude (decimal): 50.33444,-4.90194
GeoHash:G#: gbuw27ne2
UK National Grid Reference:SW935524
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Saint Stephen2,252 (2015)1.1km
Grampound537 (2017)3.9km
Nanpean2,563 (2017)4.5km
Saint Dennis2,206 (2016)5.6km
Probus1,906 (2017)5.9km


A uranium mine.

The mine began life working ochre at the surface and iron ore, principally magnetite at depth. Some tin was also raised.
Uranium ores were also discovered close to the surface, principally hydrated minerals such as Torbernite, known locally as 'Green Jim'.
Pitchblende was discovered at greater depth and in later years became the mainstay of the mine until closure in 1930.
Whilst uranium ores had been found in other Cornish mines occurrence was sporadic. South Terras was unique in Cornwall in that a lode of some 250 fathoms length (457.2m) was found with uranium derivatives being the principal ores (taken from the Journal of the Royal Institution of Cornwall Vol. 1, 1993).

The whole site is extremely radioactive, why the house remains occupied is a mystery. If the normal background radiation is 10 to 12 counts/second, across the South Terras site and even out in the road the counts wander from 50 to 200 counts/second. However, in places counts rise to 500/s and at the head of the new adit shaft contaminated water is evidently seeping out as counts across wide parts of the sunken floor exceed 2000/second.

Note on the mineral list: Xanthiosite, aerugite, and bismutoferrite have been removed from the list due to the high probability of fraudulent recording of discovery by A.W.G. Kingsbury.

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
British IslesGroup of Islands
Devon and Cornwall metalliferous mining district, England, UKMining District
St Austell Mining District, Cornwall, England, UKMining District

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


51 valid minerals. 3 erroneous literature entries.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Aerugite
Formula: Ni8.5(AsO4)2As5+O8
Andradite
Formula: Ca3Fe3+2(SiO4)3
Anglesite
Formula: PbSO4
Annabergite
Formula: Ni3(AsO4)2 · 8H2O
Arsenopyrite
Formula: FeAsS
Asbolane
Formula: (Ni,Co)2-xMn4+(O,OH)4 · nH2O
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
'Autunite Group'
Formula: A(UO2)2(XO4)2·10-12H2O
'Axinite Group'
Bassetite
Formula: Fe2+(UO2)2(PO4)2 · 10H2O
Bismuthinite
Formula: Bi2S3
Bismutoferrite
Formula: Fe3+2Bi(SiO4)2(OH)
Boltwoodite ?
Formula: (K,Na)(UO2)(SiO3OH) · 1.5H2O
Bornite
Formula: Cu5FeS4
Brochantite
Formula: Cu4(SO4)(OH)6
Carnotite ?
Formula: K2(UO2)2(VO4)2 · 3H2O
Cassiterite
Formula: SnO2
Chalcocite
Formula: Cu2S
Chalcopyrite
Formula: CuFeS2
Chalcopyrite var: Blister Copper
Formula: CuFeS2
'Chlorite Group'
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Coffinite
Formula: U(SiO4) · nH2O
Erythrite
Formula: Co3(AsO4)2 · 8H2O
Fluorite
Formula: CaF2
Francevillite
Formula: Ba(UO2)2(VO4)2 · 5H2O
Galena
Formula: PbS
'Garnet Group'
Formula: X3Z2(SiO4)3
Gersdorffite
Formula: NiAsS
Hematite
Formula: Fe2O3
'Hornblende'
Kaňkite
Formula: FeAsO4 · 3.5H2O
Magnetite
Formula: Fe2+Fe3+2O4
Marcasite
Formula: FeS2
Metasaléeite
Formula: Mg(UO2)2(PO4)2 · 8H2O
Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
'Metatorbernite-Metazeunerite Series'
Metazeunerite
Formula: Cu(UO2)2(AsO4)2 · 8H2O
Mixite
Formula: BiCu6(AsO4)3(OH)6 · 3H2O
'Monazite'
'Ochre'
Olivenite
Formula: Cu2(AsO4)(OH)
Opal
Formula: SiO2 · nH2O
Parsonsite
Formula: Pb2(UO2)(PO4)2
Pharmacosiderite
Formula: KFe3+4(AsO4)3(OH)4 · 6-7H2O
Pyrite
Formula: FeS2
Quartz
Formula: SiO2
Quartz var: Agate
Quartz var: Smoky Quartz
Formula: SiO2
Rammelsbergite
Formula: NiAs2
Rutherfordine
Formula: (UO2)CO3
Saléeite
Formula: Mg(UO2)2(PO4)2 · 10H2O
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Scorodite
Formula: Fe3+AsO4 · 2H2O
Siderite
Formula: FeCO3
Skutterudite
Formula: CoAs3
Sphalerite
Formula: ZnS
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Trögerite
Formula: (H3O)(UO2)(AsO4) · 3H2O
Uraninite
Formula: UO2
Uraninite var: Pitchblende
Formula: UO2
Wittichenite
Formula: Cu3BiS3
'Wolframite'
Formula: (Fe2+)WO4 to (Mn2+)WO4
Xanthiosite
Formula: Ni3(AsO4)2
Zeunerite
Formula: Cu(UO2)2(AsO4)2 · 12H2O
Zippeite
Formula: K3(UO2)4(SO4)2O3(OH) · 3H2O

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Bismuthinite2.DB.05Bi2S3
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
var: Blister Copper2.CB.10aCuFeS2
Galena2.CD.10PbS
Gersdorffite2.EB.25NiAsS
Marcasite2.EB.10aFeS2
Pyrite2.EB.05aFeS2
Rammelsbergite2.EB.15aNiAs2
Skutterudite2.EC.05CoAs3
Sphalerite2.CB.05aZnS
Wittichenite2.GA.20Cu3BiS3
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Asbolane4.FL.30(Ni,Co)2-xMn4+(O,OH)4 · nH2O
Carnotite ?4.HB.05K2(UO2)2(VO4)2 · 3H2O
Cassiterite4.DB.05SnO2
Francevillite4.HB.15Ba(UO2)2(VO4)2 · 5H2O
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Opal4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
var: Agate4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Uraninite4.DL.05UO2
var: Pitchblende4.DL.05UO2
Group 5 - Nitrates and Carbonates
Rutherfordine5.EB.05(UO2)CO3
Siderite5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anglesite7.AD.35PbSO4
Brochantite7.BB.25Cu4(SO4)(OH)6
Zippeite7.EC.05K3(UO2)4(SO4)2O3(OH) · 3H2O
Group 8 - Phosphates, Arsenates and Vanadates
Aerugite ?8.BC.15Ni8.5(AsO4)2As5+O8
Annabergite8.CE.40Ni3(AsO4)2 · 8H2O
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Bassetite8.EB.10Fe2+(UO2)2(PO4)2 · 10H2O
Erythrite8.CE.40Co3(AsO4)2 · 8H2O
Kaňkite8.CE.60FeAsO4 · 3.5H2O
Metasaléeite8.EB.10Mg(UO2)2(PO4)2 · 8H2O
Metatorbernite8.EB.10Cu(UO2)2(PO4)2 · 8H2O
Metazeunerite8.EB.10Cu(UO2)2(AsO4)2 · 8H2O
Mixite8.DL.15BiCu6(AsO4)3(OH)6 · 3H2O
Olivenite8.BB.30Cu2(AsO4)(OH)
Parsonsite8.EA.10Pb2(UO2)(PO4)2
Pharmacosiderite8.DK.10KFe3+4(AsO4)3(OH)4 · 6-7H2O
Saléeite8.EB.05Mg(UO2)2(PO4)2 · 10H2O
Scorodite8.CD.10Fe3+AsO4 · 2H2O
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Trögerite8.EB.15(H3O)(UO2)(AsO4) · 3H2O
Xanthiosite ?8.AB.25Ni3(AsO4)2
Zeunerite8.EB.05Cu(UO2)2(AsO4)2 · 12H2O
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Andradite9.AD.25Ca3Fe3+2(SiO4)3
Bismutoferrite ?9.ED.25Fe3+2Bi(SiO4)2(OH)
Boltwoodite ?9.AK.15(K,Na)(UO2)(SiO3OH) · 1.5H2O
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Coffinite9.AD.30U(SiO4) · nH2O
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Unclassified Minerals, Rocks, etc.
'Autunite Group'-A(UO2)2(XO4)2·10-12H2O
'Axinite Group'-
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-
'Metatorbernite-Metazeunerite Series'-
'Monazite'-
'Ochre'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
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 = 2:3
Bismuthinite2.11.2.3Bi2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Gersdorffite2.12.3.2NiAsS
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Rammelsbergite2.12.2.12NiAs2
Skutterudite2.12.17.1CoAs3
Group 3 - SULFOSALTS
ø = 3
Wittichenite3.4.8.1Cu3BiS3
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Cassiterite4.4.1.5SnO2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
Miscellaneous
Asbolane6.4.9.1(Ni,Co)2-xMn4+(O,OH)4 · nH2O
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Rutherfordine14.1.4.1(UO2)CO3
Siderite14.1.1.3FeCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)m(XO4)pZq, where m:p>2:1
Brochantite30.1.3.1Cu4(SO4)(OH)6
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
Miscellaneous
Zippeite31.10.4.1K3(UO2)4(SO4)2O3(OH) · 3H2O
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
(AB)3(XO4)2
Xanthiosite ?38.3.2.1Ni3(AsO4)2
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Bassetite40.2a.16.1Fe2+(UO2)2(PO4)2 · 10H2O
Carnotite ?40.2a.28.1K2(UO2)2(VO4)2 · 3H2O
Francevillite40.2a.27.1Ba(UO2)2(VO4)2 · 5H2O
Metatorbernite40.2a.13.2Cu(UO2)2(PO4)2 · 8H2O
Metazeunerite40.2a.14.2Cu(UO2)2(AsO4)2 · 8H2O
Parsonsite40.2a.31.1Pb2(UO2)(PO4)2
Saléeite40.2a.11.1Mg(UO2)2(PO4)2 · 10H2O
Torbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
Trögerite40.2a.20.1(H3O)(UO2)(AsO4) · 3H2O
Zeunerite40.2a.14.1Cu(UO2)2(AsO4)2 · 12H2O
A3(XO4)2·xH2O
Annabergite40.3.6.4Ni3(AsO4)2 · 8H2O
Erythrite40.3.6.3Co3(AsO4)2 · 8H2O
(AB)5(XO4)2·xH2O
Scorodite40.4.1.3Fe3+AsO4 · 2H2O
AXO4·xH2O
Kaňkite40.5.4.FeAsO4 · 3.5H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)3(XO4)Zq
Aerugite ?41.3.11. Ni8.5(AsO4)2As5+O8
A2(XO4)Zq
Olivenite41.6.6.1Cu2(AsO4)(OH)
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)7(XO4)3Zq·xH2O
Mixite42.5.1.1BiCu6(AsO4)3(OH)6 · 3H2O
(AB)5(XO4)3Zq·xH2O
Pharmacosiderite42.8.1a.1KFe3+4(AsO4)3(OH)4 · 6-7H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Coffinite51.5.2.4U(SiO4) · nH2O
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Boltwoodite ?53.3.1.5(K,Na)(UO2)(SiO3OH) · 1.5H2O
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Bismutoferrite ?71.1.3.1Fe3+2Bi(SiO4)2(OH)
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Autunite Group'-A(UO2)2(XO4)2·10-12H2O
'Axinite Group'-
Chalcopyrite
var: Blister Copper
-CuFeS2
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-
Metasaléeite-Mg(UO2)2(PO4)2 · 8H2O
'Metatorbernite-Metazeunerite Series'-
'Monazite'-
'Ochre'-
Quartz
var: Agate
-SiO2
var: Smoky Quartz-SiO2
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
Uraninite
var: Pitchblende
-UO2
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals for each chemical element

HHydrogen
H AnnabergiteNi3(AsO4)2 · 8H2O
H Asbolane(Ni,Co)2-xMn4+(O,OH)4 · nH2O
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H BassetiteFe2+(UO2)2(PO4)2 · 10H2O
H CoffiniteU(SiO4) · nH2O
H ErythriteCo3(AsO4)2 · 8H2O
H FrancevilliteBa(UO2)2(VO4)2 · 5H2O
H KaňkiteFeAsO4 · 3.5H2O
H MetasaléeiteMg(UO2)2(PO4)2 · 8H2O
H MetatorberniteCu(UO2)2(PO4)2 · 8H2O
H MetazeuneriteCu(UO2)2(AsO4)2 · 8H2O
H MixiteBiCu6(AsO4)3(OH)6 · 3H2O
H OliveniteCu2(AsO4)(OH)
H PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
H SaléeiteMg(UO2)2(PO4)2 · 10H2O
H ScoroditeFe3+AsO4 · 2H2O
H TorberniteCu(UO2)2(PO4)2 · 12H2O
H ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
H ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Trögerite(H3O)(UO2)(AsO4) · 3H2O
H ClinochloreMg5Al(AlSi3O10)(OH)8
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Autunite GroupA(UO2)2(XO4)2·10-12H2O
H ParsonsitePb2(UO2)(PO4)2
H BrochantiteCu4(SO4)(OH)6
H OpalSiO2 · nH2O
H CarnotiteK2(UO2)2(VO4)2 · 3H2O
H Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
H BismutoferriteFe23+Bi(SiO4)2(OH)
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C Rutherfordine(UO2)CO3
C SideriteFeCO3
OOxygen
O AndraditeCa3Fe23+(SiO4)3
O AnnabergiteNi3(AsO4)2 · 8H2O
O Asbolane(Ni,Co)2-xMn4+(O,OH)4 · nH2O
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O BassetiteFe2+(UO2)2(PO4)2 · 10H2O
O CoffiniteU(SiO4) · nH2O
O ErythriteCo3(AsO4)2 · 8H2O
O FrancevilliteBa(UO2)2(VO4)2 · 5H2O
O KaňkiteFeAsO4 · 3.5H2O
O MagnetiteFe2+Fe23+O4
O MetasaléeiteMg(UO2)2(PO4)2 · 8H2O
O MetatorberniteCu(UO2)2(PO4)2 · 8H2O
O MetazeuneriteCu(UO2)2(AsO4)2 · 8H2O
O MixiteBiCu6(AsO4)3(OH)6 · 3H2O
O OliveniteCu2(AsO4)(OH)
O PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
O Rutherfordine(UO2)CO3
O SaléeiteMg(UO2)2(PO4)2 · 10H2O
O ScoroditeFe3+AsO4 · 2H2O
O Quartz (var: Smoky Quartz)SiO2
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O UraniniteUO2
O ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
O ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Garnet GroupX3Z2(SiO4)3
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O QuartzSiO2
O Uraninite (var: Pitchblende)UO2
O SideriteFeCO3
O CassiteriteSnO2
O Trögerite(H3O)(UO2)(AsO4) · 3H2O
O ClinochloreMg5Al(AlSi3O10)(OH)8
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
O HematiteFe2O3
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O AnglesitePbSO4
O Autunite GroupA(UO2)2(XO4)2·10-12H2O
O ParsonsitePb2(UO2)(PO4)2
O BrochantiteCu4(SO4)(OH)6
O OpalSiO2 · nH2O
O CarnotiteK2(UO2)2(VO4)2 · 3H2O
O Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
O BismutoferriteFe23+Bi(SiO4)2(OH)
O AerugiteNi8.5(AsO4)2As5+O8
O XanthiositeNi3(AsO4)2
FFluorine
F FluoriteCaF2
NaSodium
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
MgMagnesium
Mg Asbolane(Ni,Co)2-xMn4+(O,OH)4 · nH2O
Mg MetasaléeiteMg(UO2)2(PO4)2 · 8H2O
Mg SaléeiteMg(UO2)2(PO4)2 · 10H2O
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
AlAluminium
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
SiSilicon
Si AndraditeCa3Fe23+(SiO4)3
Si CoffiniteU(SiO4) · nH2O
Si Quartz (var: Smoky Quartz)SiO2
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Garnet GroupX3Z2(SiO4)3
Si QuartzSiO2
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si OpalSiO2 · nH2O
Si Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
Si BismutoferriteFe23+Bi(SiO4)2(OH)
PPhosphorus
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P BassetiteFe2+(UO2)2(PO4)2 · 10H2O
P MetasaléeiteMg(UO2)2(PO4)2 · 8H2O
P MetatorberniteCu(UO2)2(PO4)2 · 8H2O
P SaléeiteMg(UO2)2(PO4)2 · 10H2O
P TorberniteCu(UO2)2(PO4)2 · 12H2O
P ParsonsitePb2(UO2)(PO4)2
SSulfur
S GersdorffiteNiAsS
S ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
S GalenaPbS
S PyriteFeS2
S ChalcopyriteCuFeS2
S MarcasiteFeS2
S SphaleriteZnS
S ArsenopyriteFeAsS
S ChalcociteCu2S
S BorniteCu5FeS4
S BismuthiniteBi2S3
S WitticheniteCu3BiS3
S AnglesitePbSO4
S BrochantiteCu4(SO4)(OH)6
S Chalcopyrite (var: Blister Copper)CuFeS2
KPotassium
K PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
K ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
K CarnotiteK2(UO2)2(VO4)2 · 3H2O
K Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
CaCalcium
Ca AndraditeCa3Fe23+(SiO4)3
Ca Asbolane(Ni,Co)2-xMn4+(O,OH)4 · nH2O
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca FluoriteCaF2
VVanadium
V FrancevilliteBa(UO2)2(VO4)2 · 5H2O
V CarnotiteK2(UO2)2(VO4)2 · 3H2O
MnManganese
Mn Asbolane(Ni,Co)2-xMn4+(O,OH)4 · nH2O
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
FeIron
Fe AndraditeCa3Fe23+(SiO4)3
Fe BassetiteFe2+(UO2)2(PO4)2 · 10H2O
Fe KaňkiteFeAsO4 · 3.5H2O
Fe MagnetiteFe2+Fe23+O4
Fe PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
Fe ScoroditeFe3+AsO4 · 2H2O
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe PyriteFeS2
Fe SideriteFeCO3
Fe ChalcopyriteCuFeS2
Fe MarcasiteFeS2
Fe ArsenopyriteFeAsS
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
Fe HematiteFe2O3
Fe BorniteCu5FeS4
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe Chalcopyrite (var: Blister Copper)CuFeS2
Fe BismutoferriteFe23+Bi(SiO4)2(OH)
CoCobalt
Co Asbolane(Ni,Co)2-xMn4+(O,OH)4 · nH2O
Co ErythriteCo3(AsO4)2 · 8H2O
Co SkutteruditeCoAs3
NiNickel
Ni AnnabergiteNi3(AsO4)2 · 8H2O
Ni Asbolane(Ni,Co)2-xMn4+(O,OH)4 · nH2O
Ni GersdorffiteNiAsS
Ni RammelsbergiteNiAs2
Ni AerugiteNi8.5(AsO4)2As5+O8
Ni XanthiositeNi3(AsO4)2
CuCopper
Cu MetatorberniteCu(UO2)2(PO4)2 · 8H2O
Cu MetazeuneriteCu(UO2)2(AsO4)2 · 8H2O
Cu MixiteBiCu6(AsO4)3(OH)6 · 3H2O
Cu OliveniteCu2(AsO4)(OH)
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
Cu ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S
Cu BorniteCu5FeS4
Cu WitticheniteCu3BiS3
Cu BrochantiteCu4(SO4)(OH)6
Cu Chalcopyrite (var: Blister Copper)CuFeS2
ZnZinc
Zn SphaleriteZnS
AsArsenic
As AnnabergiteNi3(AsO4)2 · 8H2O
As ErythriteCo3(AsO4)2 · 8H2O
As GersdorffiteNiAsS
As KaňkiteFeAsO4 · 3.5H2O
As MetazeuneriteCu(UO2)2(AsO4)2 · 8H2O
As MixiteBiCu6(AsO4)3(OH)6 · 3H2O
As OliveniteCu2(AsO4)(OH)
As PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
As RammelsbergiteNiAs2
As ScoroditeFe3+AsO4 · 2H2O
As SkutteruditeCoAs3
As ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
As ArsenopyriteFeAsS
As Trögerite(H3O)(UO2)(AsO4) · 3H2O
As AerugiteNi8.5(AsO4)2As5+O8
As XanthiositeNi3(AsO4)2
SnTin
Sn CassiteriteSnO2
BaBarium
Ba FrancevilliteBa(UO2)2(VO4)2 · 5H2O
WTungsten
W Wolframite(Fe2+)WO4 to (Mn2+)WO4
PbLead
Pb GalenaPbS
Pb AnglesitePbSO4
Pb ParsonsitePb2(UO2)(PO4)2
BiBismuth
Bi MixiteBiCu6(AsO4)3(OH)6 · 3H2O
Bi BismuthiniteBi2S3
Bi WitticheniteCu3BiS3
Bi BismutoferriteFe23+Bi(SiO4)2(OH)
UUranium
U AutuniteCa(UO2)2(PO4)2 · 11H2O
U BassetiteFe2+(UO2)2(PO4)2 · 10H2O
U CoffiniteU(SiO4) · nH2O
U FrancevilliteBa(UO2)2(VO4)2 · 5H2O
U MetasaléeiteMg(UO2)2(PO4)2 · 8H2O
U MetatorberniteCu(UO2)2(PO4)2 · 8H2O
U MetazeuneriteCu(UO2)2(AsO4)2 · 8H2O
U Rutherfordine(UO2)CO3
U SaléeiteMg(UO2)2(PO4)2 · 10H2O
U TorberniteCu(UO2)2(PO4)2 · 12H2O
U UraniniteUO2
U ZeuneriteCu(UO2)2(AsO4)2 · 12H2O
U ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
U Uraninite (var: Pitchblende)UO2
U Trögerite(H3O)(UO2)(AsO4) · 3H2O
U Autunite GroupA(UO2)2(XO4)2·10-12H2O
U ParsonsitePb2(UO2)(PO4)2
U CarnotiteK2(UO2)2(VO4)2 · 3H2O
U Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O

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]

Devonian
358.9 - 419.2 Ma



ID: 3135951
Devonian claystone

Age: Devonian (358.9 - 419.2 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]

Early Devonian
393.3 - 419.2 Ma



ID: 2033471
Lower Devonian Rocks (Undifferentiated)

Age: Early Devonian (393.3 - 419.2 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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dines, H.G. (1956) The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, 541-543.
Embrey, P.G. (1978) Fourth supplementary list of British Minerals. Mineralogical Magazine, 42(322), 169-177.
Rocks & Minerals, 23, 690.

External Links



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