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Carharrack Mine, Carharrack, Gwennap CP, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 14' 4'' North , 5° 10' 26'' West
Latitude & Longitude (decimal): 50.23452,-5.17414
UK National Grid Reference:SW738421
Other regions containing this locality:Devon and Cornwall metalliferous mining district, England, UK
Köppen climate type:Cfb : Temperate oceanic climate

According to a district mining map dating to 1845, the Carharrack Mine sett is a roughly triangular shape and extends from the north-eastern side of Carharrack village, bounded by the B3298 on its western side, the southern boundary being approximately indicated by an unnamed road located to the north of Consols Road and separated from Wheal Jewell to the north by the stream in the valley.

The apex of the sett to the north-east meets the western side of Wheal Maid Mine, with which Carharrack Mine was worked at one stage.

It would appear that there are no known extant plans of the mine, although it is noted that the upper levels are located within the killas and the granite (noted to contain green and purple fluorite) is encountered at depth.

The mine is noted for being the type locality for the arsenate minerals olivenite and pharmacosiderite.

Little is now to be seen of this mine with the majority of the shafts having been obscured and areas of dumps reclaimed as rough farm land.

Although located near Carharrack, only a part of the Carharrack sett is actually in current Carharrack civil parish, it lies mostly within the current Gwennap CP.

One of a number of small mines amalgamated under the name of Consolidated Mines in 1780. (checking for verification)

St Day United was the name given to Poldice and Carharrack Mines together with Wheal Maid when they amalgamated in 1852.

In 1864, Wheals Unity, Gorland, Creegbrawse and Penkevil were added to the group and in 1870 the group's name changed to Poldice Mines.

Mineral List

21 valid minerals. 2 (TL) - type locality of valid minerals.


Geologic TimeRocks, Minerals and Events
ⓘ Major polymetallic mineralization~270 MaCornwall, England, UK
ⓘ 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

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]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on 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 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.


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Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, pp. 409-410.

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