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Cheesewring Quarry, Minions, Linkinhorne, Liskeard District, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 31' 26'' North , 4° 27' 23'' West
Latitude & Longitude (decimal): 50.52395,-4.45646
UK National Grid Reference:SX259723
Other regions containing this locality:Devon and Cornwall metalliferous mining district, England, UK
Köppen climate type:Cfb : Temperate oceanic climate


A historic granite quarry adjacent to the Cheesewring tor located approximately 1 mile NW of the village of Minions on Bodmin Moor. The granite forms part of the late-Carboniferous and early-Permian Cornubian batholith and carries accessory andalusite (i.e. peraluminous).
Quarrying started in 1845 and diminished by the early 20th century, however, more recent work occurred as recently as 1984 and resulted in the destruction of some industrial archaeological sites.

Bowman (1911) described bertrandite in the form of small, tabular crystals in small cavities in joints in the granite associated with adularia, fluorite, quartz crystals and small needles of greenish tourmaline. These joints also carry wolframite, pyrite, torbernite, and anatase.

Elsewhere in the quarry, Bowman noted an occurrence of autunite associated with pale blue apatite, quartz, and orthoclase.

Note on the mineral list: Danburite, Durangite, and Milarite have been removed from the list due to the high probability of fraudulent recording of discovery by A.W.G. Kingsbury.

Mineral List


19 valid minerals. 3 erroneous literature entries.

Rock Types Recorded

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Alphabetical List Tree Diagram

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

Permian - Carboniferous
252.17 - 358.9 Ma



ID: 2028951
Unnamed Igneous Intrusion, Carboniferous To Permian

Age: Paleozoic (252.17 - 358.9 Ma)

Lithology: Felsic-rock

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



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References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bowman, H.L. (1911) On the occurrence of bertrandite at the Cheesewring Quarry, near Liskeard, Cornwall. Mineralogical Magazine, vol. 16, n° 73, 47-50.
Russell, A. (1911) On the occurrence of phenacite in Cornwall. Mineralogical Magazine, vol. 16, n° 73, 55-62.
Green, D.I., Hubbard, N., and Jewson, C. (1996) Stolzite from two Cornish localities. UK Journal of Mines & Minerals, 16, 14.

Mineral and/or Locality  
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