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South Tamar Consols (South Tamar Mine; Cowes Mine; incl. Cleave Mine; Birch Mine), Bere Alston (Beeralstone; incl. Bere Alston Mines; Old Beer Mines; Tamar Silver-Lead Mines), Bere Ferrers (Beer Ferris), West Devon, Devon, England, UKi
Regional Level Types
South Tamar Consols (South Tamar Mine; Cowes Mine; incl. Cleave Mine; Birch Mine)Mine
Bere Alston (Beeralstone; incl. Bere Alston Mines; Old Beer Mines; Tamar Silver-Lead Mines)- not defined -
Bere Ferrers (Beer Ferris)Civil Parish
West Devon- not defined -
DevonCounty
EnglandConstituent Country
UKCountry

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Key
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Latitude & Longitude (WGS84):
50° 27' 34'' North , 4° 12' 17'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SX436644
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Bere Alston2,164 (2018)2.7km
Calstock790 (2017)4.1km
Saltash15,566 (2017)5.7km
Buckland Monachorum779 (2018)6.6km
Gunnislake4,044 (2017)7.2km


Worked in the early 1800s the silver content at South Tamar ran at 40 to 90oz to the ton.

In 1820 a merger linked South Tamar, South Hooe and Tamar Valley Mines as Bere Alston Mines, but in 1821 the whole was offered for sale.

South Tamar was reopened in 1846 and within a year Cowie’s Shaft was 90 fathoms deep and was worked 1/2 mile under the river in the lower levels. In 1851 output rose to 80 tons in December and in 1854 all levels were producing well.

On 31st august 1856 the river broke in to the mine through a clay filled fault and the lower levels were immediately flooded. Fortunately the ingress took place on a Sunday when the mine was deserted and there was no loss of life. For some time a number of schemes were proposed to recover the mine and the broken ore lying in the lower levels. It is said that Isambard Kingdom Brunnel was called to the mine from work on the Saltash Albert Railway Bridge. But in December the mine was abandoned without hope of restarting (A.K. Hamilton Jenkin).

Engine shaft is sunk to a depth of 146-fm on the 15 degree east underlie. The majority of the work extends to the south. Glynn’s shaft is 100 yards of Engine and connects at the 70, 80 & 90-fm levels.

The silver content is said to have been 80-120oz per ton in the upper levels down to 35-40oz pre ton in the lower levels.

Recorded output as South Tamar Consols are 1849-60 7140 tons of 64% lead ore and 350 tons fluorspar. In 1852-60 262470oz silver (Dines H.G. 1956)

There is a tip under the electricity lines on the river bank (2 samples of galena collected from here did not test positive for silver content greater than 0.05%) and another in the field a little to the north. There is a further tip and a chimney beside the road further north again at Cotts. This is right on the boundary between the South Tamar and Furzehill setts.

A shallow shaft of about 20 feet (SX435644) gives access to a low adit meandering in a north-westerly direction. The adit is flooded along the entire length to a depth of about 2 feet. At about 50m the adit crosses another shaft which is not apparently open to surface. Thereafter the adit constricts and ends after 10m in a collapse.
Jan 2005

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
British IslesGroup of Islands
Devon and Cornwall metalliferous mining district, England, UKMining District
Callington and Tavistock Mining District, Cornwall/Devon, England, UKMining District

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


14 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Reference: Collection Richard De Nul
Aragonite
Formula: CaCO3
Reference: Collection Richard De Nul
Cerussite
Formula: PbCO3
Reference: Collection Richard De Nul
'Chlorite Group'
Reference: Collection Richard De Nul
Fluorite
Formula: CaF2
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 684
Galena
Formula: PbS
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 684
Goethite
Formula: α-Fe3+O(OH)
Reference: Collection Richard De Nul
Hydrozincite
Formula: Zn5(CO3)2(OH)6
Reference: Collection Richard De Nul
Linarite
Formula: PbCu(SO4)(OH)2
Reference: Collection Richard De Nul
Pyrite
Formula: FeS2
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 684
Quartz
Formula: SiO2
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 684
Smithsonite
Formula: ZnCO3
Reference: Collection Richard De Nul
Sphalerite
Formula: ZnS
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 684
Sulphur
Formula: S8
Reference: Collection Richard De Nul
Wurtzite
Formula: (Zn,Fe)S
Reference: Collection Richard De Nul

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Sulphur1.CC.05S8
Group 2 - Sulphides and Sulfosalts
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Wurtzite2.CB.45(Zn,Fe)S
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Aragonite5.AB.15CaCO3
Cerussite5.AB.15PbCO3
Hydrozincite5.BA.15Zn5(CO3)2(OH)6
Smithsonite5.AB.05ZnCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anglesite7.AD.35PbSO4
Linarite7.BC.65PbCu(SO4)(OH)2
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Sulphur1.3.5.1S8
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
Wurtzite2.8.7.1(Zn,Fe)S
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Cerussite14.1.3.4PbCO3
Smithsonite14.1.1.6ZnCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Hydrozincite16a.4.1.1Zn5(CO3)2(OH)6
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Linarite30.2.3.1PbCu(SO4)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Aragonite-CaCO3
'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
H Goethiteα-Fe3+O(OH)
H HydrozinciteZn5(CO3)2(OH)6
H LinaritePbCu(SO4)(OH)2
CCarbon
C CerussitePbCO3
C AragoniteCaCO3
C HydrozinciteZn5(CO3)2(OH)6
C SmithsoniteZnCO3
OOxygen
O QuartzSiO2
O CerussitePbCO3
O AnglesitePbSO4
O AragoniteCaCO3
O Goethiteα-Fe3+O(OH)
O HydrozinciteZn5(CO3)2(OH)6
O SmithsoniteZnCO3
O LinaritePbCu(SO4)(OH)2
FFluorine
F FluoriteCaF2
SiSilicon
Si QuartzSiO2
SSulfur
S GalenaPbS
S SphaleriteZnS
S AnglesitePbSO4
S Wurtzite(Zn,Fe)S
S PyriteFeS2
S SulphurS8
S LinaritePbCu(SO4)(OH)2
CaCalcium
Ca FluoriteCaF2
Ca AragoniteCaCO3
FeIron
Fe PyriteFeS2
Fe Goethiteα-Fe3+O(OH)
CuCopper
Cu LinaritePbCu(SO4)(OH)2
ZnZinc
Zn SphaleriteZnS
Zn Wurtzite(Zn,Fe)S
Zn HydrozinciteZn5(CO3)2(OH)6
Zn SmithsoniteZnCO3
PbLead
Pb GalenaPbS
Pb CerussitePbCO3
Pb AnglesitePbSO4
Pb LinaritePbCu(SO4)(OH)2

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

Early Carboniferous
323.2 - 358.9 Ma



ID: 3192903
Paleozoic sedimentary rocks

Age: Mississippian (323.2 - 358.9 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Late Devonian
358.9 - 382.7 Ma



ID: 3132501
Late Devonian claystone

Age: Late Devonian (358.9 - 382.7 Ma)

Lithology: Claystone

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Late Devonian
358.9 - 382.7 Ma



ID: 2034644
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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 2, p. 684.
Hamilton Jenkin, A. K. (1974): Mines of Devon, Vol. 1: The Southern Area. David & Charles (Newton Abbot), 154 pp.
Claughton, P. (1994): Silver-Lead: A Restricted Resource - Technological Choice in the Devon Mines. Bulletin of the Peak District Mines Historical Society 12(3), 54-59.


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