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Trevascus Mine (Trevaskus Mine; Trevaskis Mine), Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK i
Regional Level Types
Trevascus Mine (Trevaskus Mine; Trevaskis Mine) Mine (Abandoned)
Carnhell Green Village
Gwinear-Gwithian Civil Parish
Cornwall County
England Constituent Country
UK Country

Regional Level Types
Trevascus Mine (Trevaskus Mine; Trevaskis Mine)	Mine (Abandoned)
Carnhell Green	Village
Gwinear-Gwithian	Civil Parish
Cornwall	County
England	Constituent Country
UK	Country

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Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcopyrite, etc.

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcopyrite, etc.

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcopyrite, etc.

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Latitude & Longitude (WGS84):

50° 11' 35'' North , 5° 20' 51'' West

Latitude & Longitude (decimal):

G#: gbujw36h0

UK National Grid Reference:

SW611380

Type:

Mine (Abandoned) - last checked 2020

Köppen climate type:

Cfb : Temperate oceanic climate

Nearest Settlements:

Place	Population	Distance
Leedstown	267 (2017)	3.7km
Camborne	22,500 (2012)	4.2km
Hayle	8,210 (2017)	5.4km
Uny Lelant	1,056 (2017)	6.7km
Four Lanes	1,416 (2017)	7.7km

Mindat Locality ID:

934

Long-form identifier:

mindat:1:2:934:1

GUID (UUID V4):

e3d783eb-c76e-4b71-b648-e3ebfb137277

Worked from 1837 to 1842, producing 1,190 tons of 10% copper ore and 110 tons of black tin. A shaft and some overgrown burrows are located north of Trenoweth Farm, about 0.5 mile NW of Carnhell Green.

The mine is famous for the spectacular chalcedony specimens it produced.
These where recovered from the adit level around 1843.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Copper

ⓘ Tin

Mineral List

14 valid minerals.

Detailed Mineral List:

ⓘ Actinolite

Formula: ◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂

References:

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.

ⓘ 'Amphibole Supergroup'

Formula: AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂

References:

Henwood, William Jory (1843) On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall, 5. 1-386

ⓘ 'Amphibole Supergroup var. Byssolite'

Formula: AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂

References:

Henwood, William Jory (1843) On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall, 5. 1-386

ⓘ Arsenopyrite

Formula: FeAsS

References:

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.

ⓘ 'Axinite Group'

References:

Henwood, William Jory (1843) On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall, 5. 1-386

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.

ⓘ Beudantite

Formula: PbFe₃(AsO₄)(SO₄)(OH)₆

References:

Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.

ⓘ Cassiterite

Formula: SnO₂

References:

Henwood, William Jory (1843) On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall, 5. 1-386

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.

ⓘ Chalcocite

Formula: Cu₂S

References:

Henwood, William Jory (1843) On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall, 5. 1-386

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

Phillips, William (1823) An Elementary Introduction to Mineralogy (3rd ed.)

Henwood, William Jory (1843) On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall, 5. 1-386

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.

ⓘ 'Chlorite Group'

References:

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.

ⓘ Copper

Formula: Cu

References:

Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.

ⓘ Dolomite

Formula: CaMg(CO₃)₂

References:

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.

ⓘ Fluorite

Formula: CaF₂

References:

Henwood, William Jory (1843) On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall, 5. 1-386

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.

ⓘ Galena

Formula: PbS

References:

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.

ⓘ 'Petroleum var. Bitumen'

References:

Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.

ⓘ Pyrite

Formula: FeS₂

References:

Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.

ⓘ Quartz

Formula: SiO₂

References:

Henwood, William Jory (1843) On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall, 5. 1-386

Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.

ⓘ Quartz var. Chalcedony

Formula: SiO₂

References:

Phillips, William (1823) An Elementary Introduction to Mineralogy (3rd ed.)

Hogg, Thomas (1825) A Manual of Mineralogy - In which is shown how much Cornwall contributes to the illustration of the science. W. Polybank High Cross, Truro.

Henwood, William Jory (1843) On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall, 5. 1-386

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

ⓘ Quartz var. Rock Crystal

Formula: SiO₂

References:

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

ⓘ Siderite

Formula: FeCO₃

References:

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.

ⓘ Sphalerite

Formula: ZnS

References:

Henwood, William Jory (1843) On the Metalliferous Deposits of Cornwall and Devon. Transactions of the Royal Geological Society of Cornwall, 5. 1-386

Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London.

Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.

ⓘ 'Tennantite Subgroup'

Formula: Cu₆(Cu₄C²⁺₂)As₄S₁₂S

References:

Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.

Hill, J. B., MacAlister, D. A. (1906) The Geology of Falmouth and Truro and of the Mining District of Camborne and Redruth. Memoirs of the Geological Survey. Geological Survey of Great Britain

ⓘ 'Tetrahedrite Subgroup'

Formula: Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S

References:

Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.

Gallery:

SiO₂ⓘ Quartz var. Chalcedony

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

Chalcedony

Trevascus Mine, Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Copper	1.AA.05	Cu
Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcocite	2.BA.05	Cu₂S
ⓘ	Sphalerite	2.CB.05a	ZnS
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Galena	2.CD.10	PbS
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Arsenopyrite	2.EB.20	FeAsS
ⓘ	'Tetrahedrite Subgroup'	2.GB.05	Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S
ⓘ	'Tennantite Subgroup'	2.GB.05	Cu₆(Cu₄C²⁺₂)As₄S₁₂S
Group 3 - Halides
ⓘ	Fluorite	3.AB.25	CaF₂
Group 4 - Oxides and Hydroxides
ⓘ	Quartz var. Chalcedony	4.DA.05	SiO₂
ⓘ		4.DA.05	SiO₂
ⓘ	var. Rock Crystal	4.DA.05	SiO₂
ⓘ	Cassiterite	4.DB.05	SnO₂
Group 5 - Nitrates and Carbonates
ⓘ	Siderite	5.AB.05	FeCO₃
ⓘ	Dolomite	5.AB.10	CaMg(CO₃)₂
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Beudantite	8.BL.05	PbFe₃(AsO₄)(SO₄)(OH)₆
Group 9 - Silicates
ⓘ	Actinolite	9.DE.10	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Unclassified
ⓘ	'Amphibole Supergroup'	-	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
ⓘ	'Chlorite Group'	-
ⓘ	'Petroleum var. Bitumen'	-
ⓘ	'Amphibole Supergroup var. Byssolite'	-	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
ⓘ	'Axinite Group'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
H	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
H	ⓘ Beudantite	PbFe₃(AsO₄)(SO₄)(OH)₆
H	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
C	Carbon
C	ⓘ Dolomite	CaMg(CO₃)₂
C	ⓘ Siderite	FeCO₃
O	Oxygen
O	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
O	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
O	ⓘ Beudantite	PbFe₃(AsO₄)(SO₄)(OH)₆
O	ⓘ Cassiterite	SnO₂
O	ⓘ Quartz var. Chalcedony	SiO₂
O	ⓘ Dolomite	CaMg(CO₃)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Siderite	FeCO₃
O	ⓘ Quartz var. Rock Crystal	SiO₂
O	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
F	Fluorine
F	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
F	ⓘ Fluorite	CaF₂
F	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Mg	Magnesium
Mg	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Mg	ⓘ Dolomite	CaMg(CO₃)₂
Al	Aluminium
Al	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Al	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Si	Silicon
Si	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Si	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Si	ⓘ Quartz var. Chalcedony	SiO₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Quartz var. Rock Crystal	SiO₂
Si	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
S	Sulfur
S	ⓘ Arsenopyrite	FeAsS
S	ⓘ Beudantite	PbFe₃(AsO₄)(SO₄)(OH)₆
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Chalcocite	Cu₂S
S	ⓘ Galena	PbS
S	ⓘ Pyrite	FeS₂
S	ⓘ Sphalerite	ZnS
S	ⓘ Tennantite Subgroup	Cu₆(Cu₄C₂²⁺)As₄S₁₂S
S	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Cl	Chlorine
Cl	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Cl	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Ca	Calcium
Ca	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Ca	ⓘ Dolomite	CaMg(CO₃)₂
Ca	ⓘ Fluorite	CaF₂
Ti	Titanium
Ti	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Ti	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Fe	Iron
Fe	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Fe	ⓘ Arsenopyrite	FeAsS
Fe	ⓘ Beudantite	PbFe₃(AsO₄)(SO₄)(OH)₆
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Siderite	FeCO₃
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Chalcocite	Cu₂S
Cu	ⓘ Copper	Cu
Cu	ⓘ Tennantite Subgroup	Cu₆(Cu₄C₂²⁺)As₄S₁₂S
Cu	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Zn	Zinc
Zn	ⓘ Sphalerite	ZnS
As	Arsenic
As	ⓘ Arsenopyrite	FeAsS
As	ⓘ Beudantite	PbFe₃(AsO₄)(SO₄)(OH)₆
As	ⓘ Tennantite Subgroup	Cu₆(Cu₄C₂²⁺)As₄S₁₂S
Sn	Tin
Sn	ⓘ Cassiterite	SnO₂
Sb	Antimony
Sb	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Pb	Lead
Pb	ⓘ Beudantite	PbFe₃(AsO₄)(SO₄)(OH)₆
Pb	ⓘ Galena	PbS

Geochronology

Geologic Time

Rocks, Minerals and Events

ⓘ Major polymetallic mineralization

~270 Ma

Cornwall, England, UK

Cisuralian

ⓘ Porphyry dikes intruded (latest age)	~275 Ma	Cornwall, England, UK
ⓘ Greisenization (latest age)	~280 Ma	Cornwall, England, UK
ⓘ Porphyry dikes intruded (earliest age)	~280 Ma	Cornwall, England, UK
ⓘ Formation of metallized pegmatites	~285 Ma	Cornwall, England, UK
ⓘ Greisenization (earliest age)	~285 Ma	Cornwall, England, UK
ⓘ Emplacement of major plutons	~295 Ma	Cornwall, England, UK

Other Regions, Features and Areas containing this locality

British and Irish IslesGroup of Islands

Eurasian PlateTectonic Plate

EuropeContinent

England
- Cornwall
  - Gwinear Mining DistrictMining District
- Devon and Cornwall metalliferous mining districtMining District

This page contains all mineral locality references listed on mindat.org. 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 mindat.org 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.

References

Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.

Atkinson, B. (1994): Mining Sites in Cornwall, Vol. 2, Dyllansow Truran (Truro), 51 pp.

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