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Wheal Boys (Trewetha Mine; Old Trewetha Mine), Port Isaac, St Endellion, Cornwall, England, UKi
Regional Level Types
Wheal Boys (Trewetha Mine; Old Trewetha Mine)Mine
Port Isaac- not defined -
St Endellion- not defined -
CornwallCounty
EnglandConstituent Country
UKCountry

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Latitude & Longitude (WGS84): 50° 35' 6'' North , 4° 49' 9'' West
Latitude & Longitude (decimal): 50.58500,-4.81917
GeoHash:G#: gbuxf2dyc
UK National Grid Reference:SX004800
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Polzeath1,449 (2011)7.2km
Rock1,203 (2017)7.2km
Delabole1,647 (2017)7.5km
Wadebridge6,599 (2017)7.6km
Trebetherick499 (2017)7.6km


An old antimony mine on an ENE-trending lode consisting of quartz and siderite, with stibnite and lead-antimony sulphosalts near the surface and mainly galena at greater depth. The workings consist of a shaft that connects to a cross-cut adit which was driven from the valley southwest of Bodannon farm. The grid reference marks the shaft where a small overgrown dump remains. The sett is said to contain two other lodes, but details of them are not known.

The mine was at work in the late 18th century and produced 95 tons of antimony ore between 1774 and 1776. Hogg (1825) states that it "once produced 100 tons a year containing 8 parts in 20 of pure antimony". It was reopened in 1906, but no further production resulted.

In the early 1820's it is recorded that a collection of silver-lead, antimony and copper ore specimens from Old Trewetha was purchased by the British museum for £1000.

Regions containing this locality

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

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


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

Detailed Mineral List:

Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: [Golley & Williams, 1995, 4 - "Cornish Mineral Reference Manual"]
Berthierite
Formula: FeSb2S4
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
'Bindheimite'
Formula: Pb2Sb2O6O
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Bornite
Formula: Cu5FeS4
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
Boulangerite
Formula: Pb5Sb4S11
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Bournonite (TL)
Formula: PbCuSbS3
Type Locality:
Reference: Carne, J. (1822): Transactions of the Royal Geological Society of Cornwall 2, 49-128; Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.; Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577; Embrey, P.G., and Symes, R.F. (1987): Minerals of Cornwall and Devon. British Museum of Natural History (London), 154 pp.
Cervantite
Formula: Sb3+Sb5+O4
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
Chalcopyrite
Formula: CuFeS2
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577.
Dufrénoysite
Formula: Pb2As2S5
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Galena
Formula: PbS
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577.
Heteromorphite ?
Formula: Pb7Sb8S19
Description: Embrey (1978): "Two specimens from Port Isaac, Cornwall, were recorded by W. Nevill (1872) in the printed catalogue of his collection (p. 20). Doubtless omitted by Spencer from his lists because of presumed synonymy with semseyite. Confirmation is required."
Reference: Embrey, P.G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, vol. 42, n° 322, 169-177; Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications.
Jamesonite
Formula: Pb4FeSb6S14
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577
Mimetite
Formula: Pb5(AsO4)3Cl
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
'Plumosite'
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577.
Pyrite
Formula: FeS2
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577.
Quartz
Formula: SiO2
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577.
Semseyite
Formula: Pb9Sb8S21
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Siderite
Formula: FeCO3
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577.
Sphalerite
Formula: ZnS
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577.
Stephanite
Formula: Ag5SbS4
Reference: [Golley & Williams, 1995, 58 - "Cornish Mineral Reference Manual"; Dana 7:I:360.]
'Stibiconite'
Formula: Sb3+Sb5+2O6(OH)
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Stibnite
Formula: Sb2S3
Reference: Carne, J. (1822): Transactions of the Royal Geological Society of Cornwall 2, 49-128; Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.; Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577; Embrey, P.G., and Symes, R.F. (1987): Minerals of Cornwall and Devon. British Museum of Natural History (London), 154 pp.; Dana 6: 37.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Berthierite2.HA.20FeSb2S4
Bornite2.BA.15Cu5FeS4
Boulangerite2.HC.15Pb5Sb4S11
Bournonite (TL)2.GA.50PbCuSbS3
Chalcopyrite2.CB.10aCuFeS2
Dufrénoysite2.HC.05dPb2As2S5
Galena2.CD.10PbS
Heteromorphite ?2.HC.10cPb7Sb8S19
Jamesonite2.HB.15Pb4FeSb6S14
'Plumosite'2..
Pyrite2.EB.05aFeS2
Semseyite2.HC.10dPb9Sb8S21
Sphalerite2.CB.05aZnS
Stephanite2.GB.10Ag5SbS4
Stibnite2.DB.05Sb2S3
Group 4 - Oxides and Hydroxides
'Bindheimite'4.DH.20Pb2Sb2O6O
Cervantite4.DE.30Sb3+Sb5+O4
Quartz4.DA.05SiO2
'Stibiconite'4.DH.20Sb3+Sb5+2O6(OH)
Group 5 - Nitrates and Carbonates
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Siderite5.AB.05FeCO3
Group 8 - Phosphates, Arsenates and Vanadates
Mimetite8.BN.05Pb5(AsO4)3Cl

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
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
Stibnite2.11.2.1Sb2S3
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø = 4
Stephanite3.2.4.1Ag5SbS4
ø = 3
Bournonite (TL)3.4.3.2PbCuSbS3
2.5 < ø < 3
Boulangerite3.5.2.1Pb5Sb4S11
Dufrénoysite3.5.9.3Pb2As2S5
2 < ø < 2.49
Heteromorphite ?3.6.20.3Pb7Sb8S19
Jamesonite3.6.7.1Pb4FeSb6S14
Semseyite3.6.20.4Pb9Sb8S21
ø = 2
Berthierite3.7.9.3FeSb2S4
Group 4 - SIMPLE OXIDES
AX2
Cervantite4.4.16.1Sb3+Sb5+O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Siderite14.1.1.3FeCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Mimetite41.8.4.2Pb5(AsO4)3Cl
Group 44 - ANTIMONATES
A2X2O6(O,OH,F)
'Bindheimite'44.1.1.2Pb2Sb2O6O
'Stibiconite'44.1.1.1Sb3+Sb5+2O6(OH)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Plumosite'-

List of minerals for each chemical element

HHydrogen
H StibiconiteSb3+Sb25+O6(OH)
CCarbon
C AnkeriteCa(Fe2+,Mg)(CO3)2
C SideriteFeCO3
OOxygen
O AnkeriteCa(Fe2+,Mg)(CO3)2
O BindheimitePb2Sb2O6O
O MimetitePb5(AsO4)3Cl
O StibiconiteSb3+Sb25+O6(OH)
O SideriteFeCO3
O QuartzSiO2
O CervantiteSb3+Sb5+O4
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
SiSilicon
Si QuartzSiO2
SSulfur
S BournonitePbCuSbS3
S BerthieriteFeSb2S4
S BoulangeritePb5Sb4S11
S DufrénoysitePb2As2S5
S SemseyitePb9Sb8S21
S StephaniteAg5SbS4
S StibniteSb2S3
S JamesonitePb4FeSb6S14
S GalenaPbS
S SphaleriteZnS
S ChalcopyriteCuFeS2
S PyriteFeS2
S BorniteCu5FeS4
S HeteromorphitePb7Sb8S19
ClChlorine
Cl MimetitePb5(AsO4)3Cl
CaCalcium
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
FeIron
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe BerthieriteFeSb2S4
Fe SideriteFeCO3
Fe JamesonitePb4FeSb6S14
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe BorniteCu5FeS4
CuCopper
Cu BournonitePbCuSbS3
Cu ChalcopyriteCuFeS2
Cu BorniteCu5FeS4
ZnZinc
Zn SphaleriteZnS
AsArsenic
As DufrénoysitePb2As2S5
As MimetitePb5(AsO4)3Cl
AgSilver
Ag StephaniteAg5SbS4
SbAntimony
Sb BournonitePbCuSbS3
Sb BerthieriteFeSb2S4
Sb BindheimitePb2Sb2O6O
Sb BoulangeritePb5Sb4S11
Sb SemseyitePb9Sb8S21
Sb StephaniteAg5SbS4
Sb StibiconiteSb3+Sb25+O6(OH)
Sb StibniteSb2S3
Sb JamesonitePb4FeSb6S14
Sb CervantiteSb3+Sb5+O4
Sb HeteromorphitePb7Sb8S19
PbLead
Pb BournonitePbCuSbS3
Pb BindheimitePb2Sb2O6O
Pb BoulangeritePb5Sb4S11
Pb DufrénoysitePb2As2S5
Pb MimetitePb5(AsO4)3Cl
Pb SemseyitePb9Sb8S21
Pb JamesonitePb4FeSb6S14
Pb GalenaPbS
Pb HeteromorphitePb7Sb8S19

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: 3145545
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: 2035687
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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Hogg, T. (1825): A Manual of Mineralogy. Polyblank Publishers (London), 245 pp.
Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 577.
Clayton, R.E., and Spiro, B: (2000): Sulphur, carbon and oxygen isotope studies of early Variscan mineralisation and Pb-Sb vein deposits in the Cornubian orefield: implications for the scale of fluid movements during Variscan deformation. Mineralium Deposita 35, 315-331.
(in part): Dana 6: 37; Dana 7:I:360.
Hamilton Jenkin A.K. (1970): Mines And Miners Of Cornwall Vol. 16 Wadebridge, Camelford And Bude, p. 28-32


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