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Wheal Jane (Falmouth Consolidated Mines), Baldhu, Kea, Camborne - Redruth - St Day District, Cornwall, England, UK
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Cronstedtite
Wheal Jane, Baldhu, Kea, Camborne - Redruth - St Day District, Cornwall, England, UK

Photo: Steve Rust
UK Grid Reference: SW783434
Latitude: 50°14'53"N
Longitude: 5°6'36"W
 
 
An old tin and copper mine, which also produced minor amounts of arsenic, lead, zinc, tungsten, silver, pyrite and ochre. The mine is said to have already been in operation in 1740. It closed around 1875, but tributers continued work above adit at a small scale until 1893. In 1906, Falmouth Consolidated Mines were formed by amalgamation of Wheal Jane, West Wheal Jane, Wheal Widden and Nangiles Mine. Falmouth and Sperries Mine (together with Wheal Hope and East Wheal Falmouth) was also included, but not much work was done in that sett. Operations concentrated in Wheal Jane and West Wheal Jane sections. After the group was dissolved in 1916, tributers continued working the Wheal Jane section until 1919. In 1939, Wheal Jane and West Wheal Jane were taken over by Mount Wellington Mine. Some exploration work was carried out in West Wheal Jane section, followed by the retimbering of Beecher's Shaft and commencing a crosscut to access the tin reserves that had been proven north of it. Though, when Mount Wellington Mine closed in 1941, this project had not been finished.

In the mid 1960s, the mines were acquired by Consolidated Gold Fields Ltd. During the following years, intensive exploration works were carried out, and in 1969, it was decided to re-open them under the name Wheal Jane. Clemow's Shaft of West Wheal Jane section (SW772426) was widened and deepened, and a new shaft (No. 2 Shaft) was sunk to a depth of 366 m. Subsequently, an underground crusher station was constructed and full surface support services were installed. The initial production covered 10% of the UK's tin consumption, saving £4 million a year in imports. When the project was re-evaluated during the 1970s, Consolidated Gold Fields Ltd found it uneconomical and with the threat of closure, the government paid to keep the pumps working. The mine was subsequently sold to Carnon Consolidated Ltd, a subsidiary of Rio Tinto Zinc, who redeveloped the mine and the mill. Later on, the company passed its commitment to a management consortium. In 1991, the mine was found to be unviable and the pumps were switched off.

There is a difference between the modern mine and the old mine in that modern Wheal Jane includes all of the mines of the former Falmouth Consolidated group, whereas old Wheal Jane represents its northeastern section only. As a consequence, specimens collected at Wheal Jane in relatively modern times may come from any of the mines in the sett (unless otherwise noted), whereas only the very old specimens come from Wheal Jane proper. For the same reason, a separate list of minerals for old Wheal Jane is impossible to compose, and we also have not created a separate entry for the old mine in the database. The grid reference, however, refers to old Wheal Jane. The buildings of the modern mine are located between West Wheal Jane and Wheal Widden.

Old Wheal Jane, West Wheal Jane, Wheal Widden and the Nangiles Mine worked lodes in the footwall of an elvan dyke, which trends in norteastern direction from Mount Wellington Mine across the Carnon valley and can be traced for a distance of about 2 miles to the railway line south of Mount Prickle. In Wheal Jane section, Main lode was opened up by a series of shafts along the strike of the lode (SW779428, Dunstan's Shaft, to SW784430, Gilbert's Shaft) which crosses the road leading from Baldhu to Carnon Downs NE of Treva farm. The coordinates mark the engine house ruin at Giles's Shaft (New Shaft), which also formed part of the sett.

From 1847 to 1895, Wheal Jane produced 3,832 tons of black tin, 740 tons of 4% copper ore, 586 tons of zinc ore, 302 tons of 68% lead ore, 33,340 tons of pyrite, 243 tons of arsenic, 86 tons of arsenopyrite, 100 tons of ochre, 2,921 oz of silver, and 3,666 tons of iron ore from the gossan. From 1906 to 1915, the Falmouth Consolidated group produced 860 tons of black tin and 160 tons of arsenic, mainly from Wheal Jane section. Another 55.5 tons of black tin were raised from Wheal Jane section between 1916 and 1919. In 1983 and 1984, Wheal Jane produced 285,246 tons and 295,093 tons of tin ore, respectively, grading at about 0.6% of tin.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Annabergite
Arsenopyrite
Baryte
Beraunite
Bismuthinite
Cacoxenite
Cassiterite
Cerussite
Chalcanthite
Chalcopyrite
Childrenite
Clinochlore
var: Ripidolite

Crandallite
Cronstedtite
Devilline
Fluorapatite
var: Carbonate-rich Fluorapatite

Fluorite
Galena
Graphite
Hisingerite
Hydrozincite
Kaolinite
'Limonite'
Ludlamite (TL)
Magnetite
Marcasite
Melanterite
Nickeline
Pentlandite
Pharmacosiderite
Pyrite
Pyrrhotite
Quartz
Quartz
var: Amethyst

var: Citrine
var: Rock Crystal
Siderite
Sphalerite
Stannite
Tennantite
Vivianite
'Wolframite'
Wurtzite


50 entries listed. 36 valid minerals. 1 type locality (valid mineral).

Localities in this Region

UK

The above list 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

- Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 953.
- Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, pp. 428-431.
- Mining Annual Review (1985): 485.
- Lapis (1986): 11(2): 34-38.
- Mineralogical Record (1990): 20(5): 395.
- Golley & Williams (1995): Cornish Mineral Reference Manual, p. 51.

- http://homepages.tesco.net/~k.wasley/Wheal_Jane.htm [Link Broken? Aug 2014]

External Links


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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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