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South Wheal Frances, South Frances United Mines, Basset Mines, Carnkie, Carn Brea, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 12' 30'' North , 5° 15' 6'' West
Latitude & Longitude (decimal): 50.2086111111, -5.25194444444
UK National Grid Reference:SW681394
Other regions containing this locality:Devon and Cornwall metalliferous mining district, England, UK


This mine was eventually incorporated into the Basset group of mines.
Ref.: Golley & Williams, 1995, 38 - "Cornish Mineral Reference Manual"; Rocks & Min.: 17:130; P.G. Embrey, R.F. Symes: "Minerals of Cornwall and Devon", 1987, p. 45

Large group of impressive buildings at Marriot's Shaft (open and circular), including engine house, dry, stamps, boiler houses, etc. Nearby are other engine houses. Dumps largely removed and grassed-over.

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

Late Devonian
358.9 - 382.7 Ma
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 Macrostrat.org, used under Creative Commons Attribution 4.0 License



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