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Great Wheal Busy (Chacewater Mine), Chacewater, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 15' 29'' North , 5° 10' 26'' West
Latitude & Longitude (decimal): 50.25806,-5.17389
UK National Grid Reference:SW738447
Other regions containing this locality:Devon and Cornwall metalliferous mining district, England, UK


Great Wheal Busy was working a series of ENE-trending, flat dipping lodes hosted in metamorphosed killas. The sett is traversed by an elvan dyke, which was highly impregnated with sulphide ores in some places. The main ore bodies were those on Winter's lode and Chacewater lode, located in the hanging wall and footwall, respectively, of the elvan, and Hodge's lode, located in the footwall of Chacewater lode. They were worked from shafts arranged in two lines about 100 yards apart, which can still be identified in the field. Wheal Vor lode, south of the elvan, was worked from another group of shafts close to the Redruth-Chacewater road. The other lodes, on which only little work was done, are located north of the elvan and trend roughly parallel to it.

For some time, the mine was operated as Great Wheal Busy United Mine and included Hallenbeagle Mine, Great North Downs Mine, and other small mines in the area. It was already active in 1718, and was first worked for copper, but there are no records of its early production. From 1815 to 1870, it produced large quantities of copper, the bulk of which was raised before 1856 when the mine was 100 fms below Deep Adit level. In that year, the workings were sunk another 40 fms, and tin and copper ores were produced during the next ten years. In later years, it was worked mainly for arsenic. In the early 20th century, the dumps were worked over for arsenic and wolfram. Numerous shafts and spoil heaps are located in a large area north of the Redruth-Chacewater road. There are also remains of a calciner, some engine houses and a smithy.

Mineral List


12 valid minerals.

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

Middle Devonian
382.7 - 393.3 Ma
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



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. HMSO Publications (London), Vol. 1, pp. 389-391.

Embrey, P.G., and Symes, R.F. (1987): Minerals of Cornwall and Devon. British Museum of Natural History (London), p. 51.

Mineral and/or Locality  
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