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Great Work Mine (incl. Leeds Mine), Godolphin Cross, Breage, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 7' 40'' North , 5° 21' 55'' West
Latitude & Longitude (decimal): 50.12778,-5.36528
GeoHash:G#: gbujjvmp7
UK National Grid Reference:SW595308
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate


Mine dating from at least 1540. Major tin producer in the 19th century. The workings occupy the saddle between Godolphin Hill and Tregonning Hill. Coordinates are those of Leeds shaft, whose engine house was recently (2005) restored. Thomas Epsley in 1689 first introduced blasting into mining at this location.

Where Wheal Breage Lode passed from granite into greenstone, the tin ore it contained in the former disappeared instantly (Henwood, 1843).

Regions containing this locality

Devon and Cornwall metalliferous mining district, England, UK

Mining District - 760 mineral species & varietal names listed

Mount's Bay Mining District, Cornwall, England, UK

Mining District - 242 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


13 valid minerals.

Detailed Mineral List:

Arsenopyrite
Formula: FeAsS
Reference: Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107.
Cassiterite
Formula: SnO2
Reference: Smyth, W.M., Reeks, T., and Rudler, F.W. (1864): A Catalogue of the Mineral Collections in the Museum of Practical Geology. HMSO Publications (London), 190pp.; 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.; Hill, J.B., MacAlister, D.A., and Flett, J.S. (1906): The geology of Falmouth and Truro and of the mining district of Camborne and Redruth. HSMO Publications (London), 335 pp.
Chalcopyrite
Formula: CuFeS2
Reference: Smyth, W.M., Reeks, T., and Rudler, F.W. (1864): A Catalogue of the Mineral Collections in the Museum of Practical Geology. HMSO Publications (London), 190 pp.; Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Hill, J.B., MacAlister, D.A., and Flett, J.S. (1906): The geology of Falmouth and Truro and of the mining district of Camborne and Redruth. HSMO Publications (London), 335 pp.; Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107
Chalcopyrite var: Blister Copper
Formula: CuFeS2
Reference: Smyth, W.M., Reeks, T., and Rudler, F.W. (1864): A Catalogue of the Mineral Collections in the Museum of Practical Geology. HMSO Publications (London), 190pp.
'Chlorite Group'
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107
Cuprite
Formula: Cu2O
Reference: Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107.
Cuprite var: Tile ore
Formula: Cu2O
Reference: Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107.
Fluorite
Formula: CaF2
Reference: Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107.
Goethite
Formula: α-Fe3+O(OH)
Reference: Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386
Gypsum
Formula: CaSO4 · 2H2O
Reference: Collection Richard De Nul
'K Feldspar'
Reference: Collection Richard De Nul
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Collection Richard De Nul
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107
Pyrite
Formula: FeS2
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107
Quartz
Formula: SiO2
Reference: Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107.
Siderite
Formula: FeCO3
Reference: Collection Richard De Nul
Sulphur
Formula: S8
Reference: Collection Richard De Nul
Tennantite
Formula: Cu6[Cu4(Fe,Zn)2]As4S13
Reference: Hill, J.B., MacAlister, D.A., and Flett, J.S. (1906): The geology of Falmouth and Truro and of the mining district of Camborne and Redruth. HSMO Publications (London), 335 pp.; Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107
Tenorite
Formula: CuO
Reference: Smyth, W.M., Reeks, T., and Rudler, F.W. (1864): A Catalogue of the Mineral Collections in the Museum of Practical Geology. HMSO Publications (London), 190pp.; Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107
'Wolframite'
Formula: (Fe2+)WO4 to (Mn2+)WO4
Reference: Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), pp. 106-107.
'Zinnwaldite'
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Sulphur1.CC.05S8
Group 2 - Sulphides and Sulfosalts
'Arsenopyrite'2.EB.20FeAsS
Chalcopyrite2.CB.10aCuFeS2
var: Blister Copper2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Tennantite2.GB.05Cu6[Cu4(Fe,Zn)2]As4S13
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Cuprite4.AA.10Cu2O
var: Tile ore4.AA.10Cu2O
Goethite4.00.α-Fe3+O(OH)
Quartz4.DA.05SiO2
Tenorite4.AB.10CuO
Group 5 - Nitrates and Carbonates
Siderite5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Unclassified Minerals, Rocks, etc.
Chlorite Group-
K Feldspar-
'var: Adularia'-KAlSi3O8
Limonite-(Fe,O,OH,H2O)
Wolframite-(Fe2+)WO4 to (Mn2+)WO4
Zinnwaldite-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Sulphur1.3.5.1S8
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
3 <ø < 4
Tennantite3.3.6.2Cu6[Cu4(Fe,Zn)2]As4S13
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
AX
Tenorite4.2.3.1CuO
AX2
Cassiterite4.4.1.5SnO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
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 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
Chalcopyrite
var: Blister Copper
-CuFeS2
'Chlorite Group'-
Cuprite
var: Tile ore
-Cu2O
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Limonite'-(Fe,O,OH,H2O)
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4
'Zinnwaldite'-

List of minerals for each chemical element

HHydrogen
H Goethiteα-Fe3+O(OH)
H GypsumCaSO4 · 2H2O
H Limonite(Fe,O,OH,H2O)
CCarbon
C SideriteFeCO3
OOxygen
O K Feldspar (var: Adularia)KAlSi3O8
O CassiteriteSnO2
O CupriteCu2O
O Goethiteα-Fe3+O(OH)
O GypsumCaSO4 · 2H2O
O Limonite(Fe,O,OH,H2O)
O QuartzSiO2
O SideriteFeCO3
O TenoriteCuO
O Cuprite (var: Tile ore)Cu2O
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
FFluorine
F FluoriteCaF2
AlAluminium
Al K Feldspar (var: Adularia)KAlSi3O8
SiSilicon
Si K Feldspar (var: Adularia)KAlSi3O8
Si QuartzSiO2
SSulfur
S ArsenopyriteFeAsS
S Chalcopyrite (var: Blister Copper)CuFeS2
S ChalcopyriteCuFeS2
S GypsumCaSO4 · 2H2O
S PyriteFeS2
S SulphurS8
S TennantiteCu6[Cu4(Fe,Zn)2]As4S13
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
CaCalcium
Ca FluoriteCaF2
Ca GypsumCaSO4 · 2H2O
MnManganese
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
FeIron
Fe ArsenopyriteFeAsS
Fe Chalcopyrite (var: Blister Copper)CuFeS2
Fe ChalcopyriteCuFeS2
Fe Goethiteα-Fe3+O(OH)
Fe Limonite(Fe,O,OH,H2O)
Fe PyriteFeS2
Fe SideriteFeCO3
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
CuCopper
Cu Chalcopyrite (var: Blister Copper)CuFeS2
Cu ChalcopyriteCuFeS2
Cu CupriteCu2O
Cu TennantiteCu6[Cu4(Fe,Zn)2]As4S13
Cu TenoriteCuO
Cu Cuprite (var: Tile ore)Cu2O
AsArsenic
As ArsenopyriteFeAsS
As TennantiteCu6[Cu4(Fe,Zn)2]As4S13
SnTin
Sn CassiteriteSnO2
WTungsten
W Wolframite(Fe2+)WO4 to (Mn2+)WO4

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

Permian - Carboniferous
251.902 - 358.9 Ma



ID: 2031734
Unnamed Igneous Intrusion, Carboniferous To Permian

Age: Phanerozoic (251.902 - 358.9 Ma)

Lithology: Felsic-rock

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

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]

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)
Henwood, W.J. (1843): On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall 5, 1-386.


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