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Garth Mine (Wheal Darby; East Wheal Cock; Gath Mine; Wheal Mary), Sancreed, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 6' 11'' North , 5° 34' 46'' West
Latitude & Longitude (decimal): 50.10331,-5.57966
GeoHash:G#: gbuj1110b
UK National Grid Reference:SW447289
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate


On the side of the hill which rises to the south of Buryas Bridge lies an an ancient mine which was worked under a variety of names. In 1788 the North Lode which strikes E-W across the bend in the river was named Wheal Mary. At a later date the sett as a whole became generally known as Garth (or Gath) Mine. In 1827 after a period of idleness operations resumed under the name East Wheal Cock. Working continued intermittently until 1843, in the mines final year it was known as Wheal Darby.

The site of the mine was finally obliterated in 1925 and it would have disappeared into obscurity were it not for the occurrence of significant quantities of Wood Tin, specimens of which have made it into many collections of Cornish minerals.


Note: The details given in the first edition of Dines (1956) mistakenly refer to Tregavara Downs, and the production figures are those of East Wheal Cock in St Enoder. This is corrected in the 1994 reprint.

Note: The western half of the mine, the workings of which encroach under the village of Drift, lies in Sancreed CP and the eastern half, toward Buryas Bridge lies in Paul CP according to the current parish boundaries.

Regions containing this locality

Devon and Cornwall metalliferous mining district, England, UK

District - 752 mineral species & varietal names listed

St Just Mining Region, Cornwall, England, UK

Region - 268 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 valid minerals.

Detailed Mineral List:

Cassiterite
Formula: SnO2
Reference: Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, p. 104
Cassiterite var: Toad's Eye Tin
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, p. 104.
Cassiterite var: Wood Tin
Formula: SnO2
Reference: Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386; Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, p. 104.
'Chlorite Group'
Reference: P Haas collection
Orthoclase
Formula: K(AlSi3O8)
Reference: Ian Jones collection
Quartz
Formula: SiO2
Reference: Dines, H.G. (1956): The metalliferous mining region of south-west England. HMSO Publications (London), Vol. 1, p. 104.
Scheelite
Formula: Ca(WO4)
Reference: Dale Foster Collection
Siderite
Formula: FeCO3
Reference: Reid, C., Flett, J.S., Wilkinson, B.S.N., Dixon, E.E.L., Pollard, W., and MacAlister, D.A. (1907): The Geology of the Land's End District. HMSO Publications (London), p. 106.
'Wolframite'
Formula: (Fe2+)WO4 to (Mn2+)WO4
Reference: Dale Foster Collection

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Cassiterite'4.DB.05SnO2
var: Toad's Eye Tin4.DB.05SnO2
var: Wood Tin4.DB.05SnO2
'Quartz'4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Siderite'5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Scheelite'7.GA.05Ca(WO4)
Group 9 - Silicates
'Orthoclase'9.FA.30K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-
Wolframite-(Fe2+)WO4 to (Mn2+)WO4

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
AX2
Cassiterite4.4.1.5SnO2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Siderite14.1.1.3FeCO3
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
Cassiterite
var: Toad's Eye Tin
-SnO2
var: Wood Tin-SnO2
'Chlorite Group'-
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals for each chemical element

CCarbon
C SideriteFeCO3
OOxygen
O CassiteriteSnO2
O OrthoclaseK(AlSi3O8)
O QuartzSiO2
O ScheeliteCa(WO4)
O SideriteFeCO3
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
O Cassiterite (var: Wood Tin)SnO2
AlAluminium
Al OrthoclaseK(AlSi3O8)
SiSilicon
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
KPotassium
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca ScheeliteCa(WO4)
MnManganese
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
FeIron
Fe SideriteFeCO3
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
SnTin
Sn CassiteriteSnO2
Sn Cassiterite (var: Wood Tin)SnO2
WTungsten
W ScheeliteCa(WO4)
W Wolframite(Fe2+)WO4 to (Mn2+)WO4

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
251.902 - 358.9 Ma



ID: 2028219
Unnamed Igneous Intrusion, Carboniferous To Permian

Age: Phanerozoic (251.902 - 358.9 Ma)

Lithology: Felsic-rock

Reference: British Geological Survey. DiGMapGB-625. British Geological Survey ©NERC. [23]

Permian
251.902 - 298.9 Ma



ID: 3191499
Paleozoic intrusive rocks

Age: Phanerozoic (251.902 - 298.9 Ma)

Lithology: Intrusive igneous 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]

Ordovician
443.8 - 485.4 Ma



ID: 3130462
Ordovician granite

Age: Ordovician (443.8 - 485.4 Ma)

Lithology: Granite group

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]

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. 1, p. 104.
Hamilton-Jenkin, A.K. (1962): The Mines and Miners of Cornwall. Truro Bookshop (Cornwall), Volume 4 Penzance-Mounts Bay, p.15-16.


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