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North Wheal Crofty, Pool, Carn Brea, Cornwall, England, UKi
Regional Level Types
North Wheal CroftyMine
Pool- not defined -
Carn BreaCivil Parish
CornwallCounty
EnglandConstituent Country
UKCountry

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Latitude & Longitude (WGS84):
50° 13' 33'' North , 5° 16' 34'' West
Latitude & Longitude (decimal):
50.22596,-5.27619
GeoHash:
G#: gbujxzmgr
GRN:
N34W03
UK National Grid Reference:
SW661414
Type:
Mine
KΓΆppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Camborne22,500 (2012)2.1km
Four Lanes1,416 (2017)3.7km
Redruth42,690 (2017)3.8km
North Country773 (2017)3.8km
Portreath963 (2017)4.0km
Mindat Locality ID:
191298
Long-form identifier:
mindat:1:2:191298:5
GUID (UUID V4):
7e653794-9eab-4d8d-92a3-bf71bb8c2ed1


This mine was started as a copper mine in the early 19th century. First known as Trevenson Mine, it changed its name to East Wheal Crofty, when two small adjoining properties, Longclose and Dudnance mines, were included with the sett in 1830. In 1854, the latter mines were taken over by South Crofty Mine and East Wheal Crofty changed its name again to North Wheal Crofty. It continued work under this name until 1915, when it was included with South Crofty Mine. Pool Mine was the easternmost section; it was located just west of Pool cross-roads.

The sett extends from the Red River valley in the west to Pool in the east. The Camborne-Redruth road marks the southern boundary, and in the north, it is adjoined by East Wheal Seton. It comprises four lodes, from north to south, Fane's lode, Reeve's lode, Trevenson lode (Engine lode) and Cherry Garden lode. Except for Reeve's lode, which trends E-W, they all course in north-easterly directions. Trevenson lode, about 100 yards south of Reeve's lode in the west, joins the footwall of Reeve's lode in the middle of the sett. Cherry Garden lode, just south of Trevenson lode, does not intersect Reeve's lode, but changes strike and trends ENE in the eastern part of the sett. Only Reeve's lode was worked throughout the full length of the sett, a distance of about 1,000 yards. It was particularly productive in the western part, where it was up to 4 feet wide, and carried mainly copper ores. At depth, it became generally poor, although some patches of rich tin ores are said to have been encountered below the 110 fm level. It extends westwards into the Wheal Crofty sett, where it was known as Caunter lode.

Under the name East Wheal Crofty, the mine produced 100,952 tons of 7% copper ore during the periods 1832-1836, 1838, and 1848-1853, and 41 tons of black tin in 1855 and 1861. As North Wheal Crofty, it raised 9,319 tons of 6% copper ore between 1854 and 1874, and 1,635 tons of black tin in the years 1855-1874, 1899 and 1910.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


12 valid minerals.

Detailed Mineral List:

β“˜ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
β“˜ 'Axinite Group'
β“˜ Cassiterite
Formula: SnO2
β“˜ Chalcocite
Formula: Cu2S
β“˜ Chalcopyrite
Formula: CuFeS2
β“˜ 'Chlorite Group'
β“˜ 'Feldspar Group'
β“˜ Fluorite
Formula: CaF2
β“˜ Galena
Formula: PbS
β“˜ Goethite
Formula: Ξ±-Fe3+O(OH)
β“˜ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
β“˜ 'Limonite'
β“˜ 'Petroleum var. Bitumen'
β“˜ Pyrite
Formula: FeS2
β“˜ Quartz
Formula: SiO2
β“˜ Quartz var. Rock Crystal
Formula: SiO2
β“˜ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜ Sphalerite
Formula: ZnS
β“˜ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Chalcocite2.BA.05Cu2S
β“˜Sphalerite2.CB.05aZnS
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Galena2.CD.10PbS
β“˜Pyrite2.EB.05aFeS2
Group 3 - Halides
β“˜Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
β“˜Goethite4.00.Ξ±-Fe3+O(OH)
β“˜Quartz
var. Rock Crystal		4.DA.05SiO2
β“˜4.DA.05SiO2
β“˜Cassiterite4.DB.05SnO2
Group 9 - Silicates
β“˜Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Actinolite9.DE.10β—»Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
β“˜Tremolite9.DE.10β—»Ca2Mg5(Si8O22)(OH)2
Unclassified
β“˜'Petroleum
var. Bitumen'		-
β“˜'Hornblende Root Name Group'-β—»Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
β“˜'Limonite'-
β“˜'Feldspar Group'-
β“˜'Chlorite Group'-
β“˜'Axinite Group'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hβ“˜ GoethiteΞ±-Fe3+O(OH)
Hβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Hβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
BBoron
Bβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
Oβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oβ“˜ CassiteriteSnO2
Oβ“˜ GoethiteΞ±-Fe3+O(OH)
Oβ“˜ QuartzSiO2
Oβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oβ“˜ Quartz var. Rock CrystalSiO2
Oβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
FFluorine
Fβ“˜ FluoriteCaF2
Fβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
NaSodium
Naβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mgβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
AlAluminium
Alβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiSilicon
Siβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siβ“˜ Quartz var. Rock CrystalSiO2
Siβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SSulfur
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ ChalcociteCu2S
Sβ“˜ GalenaPbS
Sβ“˜ PyriteFeS2
Sβ“˜ SphaleriteZnS
ClChlorine
Clβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
CaCalcium
Caβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caβ“˜ FluoriteCaF2
Caβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Caβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
FeIron
Feβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ GoethiteΞ±-Fe3+O(OH)
Feβ“˜ PyriteFeS2
Feβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
CuCopper
Cuβ“˜ ChalcopyriteCuFeS2
Cuβ“˜ ChalcociteCu2S
ZnZinc
Znβ“˜ SphaleriteZnS
SnTin
Snβ“˜ CassiteriteSnO2
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

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

Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.pp.288-290
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