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Pednandrea Mine (Pedn-an-Drea Mine), Redruth, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 14' 0'' North , 5° 13' 21'' West
Latitude & Longitude (decimal): 50.23333,-5.22250
GeoHash:G#: gbumc0tn6
UK National Grid Reference:SW702421
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate


This mine was already active in the early 18th century, and was operated intermittently until 1891. It worked a number of ENE-trending lodes in metamorphosed killas overlying the west flank of the Carn Marth granite. The workings are located under Redruth town; the shafts are built over and most of the many small mines that were included in its sett cannot be identified today. Coordinates given are those of the stepped chimney near Engine and Sump shafts, which was erected around 1824.

The lodes are intersected by two NW-trending cross-courses, about 100 fms apart. The western cross-course, which is said to carry cobalt ores, has been traced southwards to Wheal Sparnon. The eastern cross-course (or, Braggs cross-course) presumably carries uranium ores.

During its last working period, from 1854 to 1891, the mine produced 1,090 tons of 5.5% copper ore, 7,700 tons of black tin, and, together with Wheal Sparnon, 974 tons of arsenic. It was by far the largest tin producer in the area.

Regions containing this locality

Devon and Cornwall metalliferous mining district, England, UK

Mining District - 759 mineral species & varietal names listed

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

Mining District - 258 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

17 valid minerals.

Detailed Mineral List:

Arsenopyrite
Formula: FeAsS
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, p. 369.
Bismuth
Formula: Bi
Reference: Royal Cornwall Polytechnic Society (1870): 38. Annual Report, pp. 30-31
Cassiterite
Formula: SnO2
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.
'Chlorite Group'
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
Clinoclase
Formula: Cu3(AsO4)(OH)3
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
Erythrite
Formula: Co3(AsO4)2 · 8H2O
Reference: [Embrey & Symes, 1987, 104 - "Minerals of Cornwall and Devon"; Rocks & Min.: 17:129. ]
Fluorite
Formula: CaF2
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
Fluorite var: Chlorophane
Formula: CaF2
Reference: Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.; Hogg, T. (1825): A Manual of Mineralogy. Polyblank Publishers (London), p. 131; Collins, J.H. (1892): A Handbook to the Mineralogy of Cornwall and Devon, 2nd ed., D. Bradford Barton Ltd. (Truro, UK), 108 pp.
Galena
Formula: PbS
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
Liroconite
Formula: Cu2Al(AsO4)(OH)4 · 4H2O
Reference: Royal Cornwall Polytechnic Society (1870): 38. Annual Report, pp. 30-31
Löllingite
Formula: FeAs2
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.
Nickeline
Formula: NiAs
Reference: Royal Cornwall Polytechnic Society (1870): 38. Annual Report, pp. 30-31
Olivenite
Formula: Cu2(AsO4)(OH)
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.; 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.
Pharmacosiderite
Formula: KFe3+4(AsO4)3(OH)4 · 6-7H2O
Reference: Royal Cornwall Polytechnic Society (1870): 38. Annual Report, pp. 30-31; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
'Psilomelane'
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.
Quartz
Formula: SiO2
Reference: Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.; Hogg, T. (1825): A Manual of Mineralogy. Polyblank Publishers (London), p. 189; 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 var: Amethyst
Formula: SiO2
Reference: Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.; Hogg, T. (1825): A Manual of Mineralogy. Polyblank Publishers (London), p. 189; 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 var: Chalcedony
Formula: SiO2
Reference: Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.; Hogg, T. (1825): A Manual of Mineralogy. Polyblank Publishers (London), p. 192; 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.
Scorodite
Formula: Fe3+AsO4 · 2H2O
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
'Silica'
Reference: Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.
'Silica var: Float-stone'
Reference: Phillips, W. (1823): An Elementary Introduction to the Knowledge of Mineralogy, 3rd ed. William Phillips (London), 535 pp.
Skutterudite
Formula: CoAs3
Reference: Royal Cornwall Polytechnic Society (1870): 38. Annual Report, pp. 30-31; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
Uraninite
Formula: UO2
Reference: Royal Cornwall Polytechnic Society (1870): 38. Annual Report, pp. 30-31; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
Uraninite var: Pitchblende
Formula: UO2
Reference: Royal Cornwall Polytechnic Society (1870): 38. Annual Report, pp. 30-31; Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.
'Wad' ?
Reference: 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.; 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.
'Wolframite'
Formula: (Fe2+)WO4 to (Mn2+)WO4
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.; 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.
Zippeite
Formula: K3(UO2)4(SO4)2O3(OH) · 3H2O
Reference: Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Bismuth1.CA.05Bi
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
'Galena'2.CD.10PbS
'Löllingite'2.EB.15aFeAs2
'Nickeline'2.CC.05NiAs
Skutterudite2.EC.05CoAs3
Group 3 - Halides
'Fluorite'3.AB.25CaF2
var: Chlorophane3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Uraninite4.DL.05UO2
var: Pitchblende4.DL.05UO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Zippeite7.EC.05K3(UO2)4(SO4)2O3(OH) · 3H2O
Group 8 - Phosphates, Arsenates and Vanadates
Clinoclase8.BE.20Cu3(AsO4)(OH)3
Erythrite8.CE.40Co3(AsO4)2 · 8H2O
'Liroconite'8.DF.20Cu2Al(AsO4)(OH)4 · 4H2O
'Olivenite'8.BB.30Cu2(AsO4)(OH)
'Pharmacosiderite'8.DK.10KFe3+4(AsO4)3(OH)4 · 6-7H2O
Scorodite8.CD.10Fe3+AsO4 · 2H2O
Unclassified Minerals, Rocks, etc.
Chlorite Group-
Psilomelane-
Silica-
'var: Float-stone'-
Wad ?-
Wolframite-(Fe2+)WO4 to (Mn2+)WO4

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Bismuth1.3.1.4Bi
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Nickeline2.8.11.1NiAs
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Löllingite2.12.2.9FeAs2
Skutterudite2.12.17.1CoAs3
Group 4 - SIMPLE OXIDES
AX2
Cassiterite4.4.1.5SnO2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
Miscellaneous
Zippeite31.10.4.1K3(UO2)4(SO4)2O3(OH) · 3H2O
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
A3(XO4)2·xH2O
Erythrite40.3.6.3Co3(AsO4)2 · 8H2O
(AB)5(XO4)2·xH2O
Scorodite40.4.1.3Fe3+AsO4 · 2H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)3(XO4)Zq
Clinoclase41.3.1.1Cu3(AsO4)(OH)3
A2(XO4)Zq
Olivenite41.6.6.1Cu2(AsO4)(OH)
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)3(XO4)Zq·xH2O
Liroconite42.2.1.1Cu2Al(AsO4)(OH)4 · 4H2O
(AB)5(XO4)3Zq·xH2O
Pharmacosiderite42.8.1a.1KFe3+4(AsO4)3(OH)4 · 6-7H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
Fluorite
var: Chlorophane
-CaF2
'Psilomelane'-
Quartz
var: Amethyst
-SiO2
var: Chalcedony-SiO2
'Silica'-
'var: Float-stone'-
Uraninite
var: Pitchblende
-UO2
'Wad' ?-
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals for each chemical element

HHydrogen
H ClinoclaseCu3(AsO4)(OH)3
H ErythriteCo3(AsO4)2 · 8H2O
H LiroconiteCu2Al(AsO4)(OH)4 · 4H2O
H OliveniteCu2(AsO4)(OH)
H PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
H ScoroditeFe3+AsO4 · 2H2O
H ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
OOxygen
O Quartz (var: Amethyst)SiO2
O CassiteriteSnO2
O Quartz (var: Chalcedony)SiO2
O ClinoclaseCu3(AsO4)(OH)3
O ErythriteCo3(AsO4)2 · 8H2O
O LiroconiteCu2Al(AsO4)(OH)4 · 4H2O
O OliveniteCu2(AsO4)(OH)
O PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
O Uraninite (var: Pitchblende)UO2
O QuartzSiO2
O ScoroditeFe3+AsO4 · 2H2O
O UraniniteUO2
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
O ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
FFluorine
F Fluorite (var: Chlorophane)CaF2
F FluoriteCaF2
AlAluminium
Al LiroconiteCu2Al(AsO4)(OH)4 · 4H2O
SiSilicon
Si Quartz (var: Amethyst)SiO2
Si Quartz (var: Chalcedony)SiO2
Si QuartzSiO2
SSulfur
S ArsenopyriteFeAsS
S GalenaPbS
S ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
KPotassium
K PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
K ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
CaCalcium
Ca Fluorite (var: Chlorophane)CaF2
Ca FluoriteCaF2
MnManganese
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
FeIron
Fe ArsenopyriteFeAsS
Fe LöllingiteFeAs2
Fe PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
Fe ScoroditeFe3+AsO4 · 2H2O
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
CoCobalt
Co ErythriteCo3(AsO4)2 · 8H2O
Co SkutteruditeCoAs3
NiNickel
Ni NickelineNiAs
CuCopper
Cu ClinoclaseCu3(AsO4)(OH)3
Cu LiroconiteCu2Al(AsO4)(OH)4 · 4H2O
Cu OliveniteCu2(AsO4)(OH)
AsArsenic
As ArsenopyriteFeAsS
As ClinoclaseCu3(AsO4)(OH)3
As ErythriteCo3(AsO4)2 · 8H2O
As LiroconiteCu2Al(AsO4)(OH)4 · 4H2O
As LöllingiteFeAs2
As NickelineNiAs
As OliveniteCu2(AsO4)(OH)
As PharmacosideriteKFe43+(AsO4)3(OH)4 · 6-7H2O
As ScoroditeFe3+AsO4 · 2H2O
As SkutteruditeCoAs3
SnTin
Sn CassiteriteSnO2
WTungsten
W Wolframite(Fe2+)WO4 to (Mn2+)WO4
PbLead
Pb GalenaPbS
BiBismuth
Bi BismuthBi
UUranium
U Uraninite (var: Pitchblende)UO2
U UraniniteUO2
U ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O

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: 2033495
Upper Devonian Rocks (Undifferentiated)

Age: Late Devonian (358.9 - 382.7 Ma)

Lithology: Mudstone, siltstone and sandstone

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

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)
- Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, p. 367-369.
- Embrey & Symes (1987): Minerals of Cornwall and Devon, p. 104.

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