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Hallenbeagle Mine, Chacewater, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 15' 28'' North , 5° 11' 26'' West
Latitude & Longitude (decimal): 50.2578183691, -5.19070287572
UK National Grid Reference:SW726447
Other regions containing this locality:Devon and Cornwall metalliferous mining district, England, UK


A copper mine, located east of the South Wheal Hawke and Wheal Rose sections of the Great North Downs Mine. The sett extends northwards along the eastern side of the Great Western railway. To the north, it is adjoined by the Eastdowns and Boscawen mines; to the south, it borders the workings of East Wheal Chance. Extensive spoil heaps are located on both sides of Sawmills lane. Coordinates given are those of Reed's shaft in the southern part of the sett, where a ruined engine house is located.

The mine worked four lodes; from north to south, these are North lode, South lode, Reed's lode and Oat's lode. The latter two are probably estward extensions of the lodes worked at South Wheal Hawke. In 1943, when the mines in the area were prospected for tungsten, a shaft was re-opened and cleared to a depth of 140 ft below surface, where a level following a copper lode was encountered. The lode, which was followed for a distance of 230 ft, consisted of a hard quartz leader with a vuggy centre carrying chalcopyrite, arsenopyrite, pyrite and sphalerite, but did not contain any wolframite. The source of the wolframite ore found in the dumps on the surface could not be located.

Hallenbeagle mine was included for some time with the Great Wheal Busy group. From 1835 to 1846, it produced 30,580 tons of 6% copper ore; it also raised some black tin and arsenopyrite.

Mineral List


6 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. 388-389.

External Links


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