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Wheal Castle, Boswedden Mine (incl. Wheal Praze; Wheal Williams; Yankee Boy Mine), Kenidjack Valley, St Just, Cornwall, England, UK i
Regional Level Types
Wheal Castle Mine (Abandoned)
Boswedden Mine (incl. Wheal Praze; Wheal Williams; Yankee Boy Mine) Mine
Kenidjack Valley Valley
St Just Civil Parish
Cornwall County
England Constituent Country
UK Country

Regional Level Types
Wheal Castle	Mine (Abandoned)
Boswedden Mine (incl. Wheal Praze; Wheal Williams; Yankee Boy Mine)	Mine
Kenidjack Valley	Valley
St Just	Civil Parish
Cornwall	County
England	Constituent Country
UK	Country

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General view of the workings

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

Close-up of the Wheal Castle north lode.

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

Waterwheel pit remains ?

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

General view of the workings

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

Close-up of the Wheal Castle north lode.

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

Waterwheel pit remains ?

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

General view of the workings

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

Close-up of the Wheal Castle north lode.

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

Latitude & Longitude (WGS84):

50° 7' 51'' North , 5° 42' 5'' West

Latitude & Longitude (decimal):

G#: gbgvnq068

UK National Grid Reference:

SW355323

Type:

Mine (Abandoned) - last checked 2022

Köppen climate type:

Cfb : Temperate oceanic climate

Nearest Settlements:

Place	Population	Distance
St Just	1,957 (2017)	1.7km
Madron	626 (2017)	9.7km
Penzance	19,872 (2017)	11.8km
Mousehole	697 (2017)	12.7km
Marazion	1,294 (2017)	16.2km

Mindat Locality ID:

1301

Long-form identifier:

mindat:1:2:1301:0

GUID (UUID V4):

No description has been added for this locality. Can you add one?

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

17 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ Granite

Detailed Mineral List:

ⓘ Arsenopyrite

Formula: FeAsS

References:

Carne, J. (1822) On the Mineral Productions and the Geology of the Parish of St. Just. Transactions of the Royal Geological Society of Cornwall, 2. 290-358

ⓘ Beryl

Formula: Be₃Al₂(Si₆O₁₈)

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.

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

ⓘ Brochantite

Formula: Cu₄(SO₄)(OH)₆

References:

De Bondt, Paul (n.d.) Personal communication.

ⓘ Calcite

Formula: CaCO₃

References:

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.

ⓘ Cassiterite

Formula: SnO₂

References:

Reid, Clement, Flett, J. S. (1907) The Geology of the Land's End District - Memoirs of the Geological Survey. Geological Survey of Great Britain.p.101

ⓘ Chalcocite

Formula: Cu₂S

References:

De Bondt, Paul (n.d.) Personal communication.

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

Dale Foster Collection

ⓘ 'Chlorite Group'

References:

P Haas, collected in 2003

ⓘ Connellite

Formula: Cu₁₉(SO₄)(OH)₃₂Cl₄ · 3H₂O

References:

De Bondt, Paul (n.d.) Personal communication.

ⓘ Dolomite

Formula: CaMg(CO₃)₂

References:

Carne, J. (1822) On the Mineral Productions and the Geology of the Parish of St. Just. Transactions of the Royal Geological Society of Cornwall, 2. 290-358

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.

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.

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

References:

De Bondt, Paul (n.d.) Personal communication.

ⓘ Fluorapatite var. Carbonate-rich Fluorapatite

Formula: Ca₅(PO₄,CO₃)₃(F,O)

References:

De Bondt, Paul (n.d.) Personal communication.

ⓘ Goethite

Formula: Fe³⁺O(OH)

References:

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

ⓘ Hematite

Formula: Fe₂O₃

References:

Haas, Peter (n.d.) Personal communication.

ⓘ Hematite var. Specularite

Formula: Fe₂O₃

References:

Haas, Peter (n.d.) Personal communication.

ⓘ 'Hornblende Root Name Group'

Formula: ◻Ca₂(Z²⁺₄Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂

ⓘ 'K Feldspar'

References:

Carne, J. (1822) On the Mineral Productions and the Geology of the Parish of St. Just. Transactions of the Royal Geological Society of Cornwall, 2. 290-358

ⓘ 'K Feldspar var. Adularia'

Formula: KAlSi₃O₈

References:

Carne, J. (1822) On the Mineral Productions and the Geology of the Parish of St. Just. Transactions of the Royal Geological Society of Cornwall, 2. 290-358

ⓘ Langite

Formula: Cu₄(SO₄)(OH)₆ · 2H₂O

References:

De Bondt, Paul (n.d.) Personal communication.

ⓘ 'Limonite'

References:

Reid, Clement, Flett, J. S. (1907) The Geology of the Land's End District - Memoirs of the Geological Survey. Geological Survey of Great Britain.p.101

ⓘ Malachite

Formula: Cu₂(CO₃)(OH)₂

References:

De Bondt, Paul (n.d.) Personal communication.

ⓘ 'Mica Group'

References:

De Bondt, Paul (n.d.) Personal communication.

ⓘ Pyrite

Formula: FeS₂

References:

Carne, J. (1822) On the Mineral Productions and the Geology of the Parish of St. Just. Transactions of the Royal Geological Society of Cornwall, 2. 290-358

Reid, Clement, Flett, J. S. (1907) The Geology of the Land's End District - Memoirs of the Geological Survey. Geological Survey of Great Britain.p.101

ⓘ Quartz

Formula: SiO₂

References:

Reid, Clement, Flett, J. S. (1907) The Geology of the Land's End District - Memoirs of the Geological Survey. Geological Survey of Great Britain.p.101

ⓘ Quartz var. Amethyst

Formula: SiO₂

References:

De Bondt, Paul (n.d.) Personal communication.

ⓘ Quartz var. Chalcedony

Formula: SiO₂

References:

P Haas, collected in 2005

ⓘ Quartz var. Smoky Quartz

Formula: SiO₂

References:

De Bondt, Paul (n.d.) Personal communication.

ⓘ Siderite

Formula: FeCO₃

References:

P Haas, collected in 2005

ⓘ 'Tourmaline'

Formula: AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z

References:

De Bondt, Paul (n.d.) Personal communication.

Gallery:

SnO₂ⓘ Cassiterite

Cassiterite, etc.

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

Cassiterite, etc.

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

Cassiterite, etc.

Wheal Castle, Boswedden Mine, Kenidjack Valley, St Just, Cornwall, England, UK

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcocite	2.BA.05	Cu₂S
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	Arsenopyrite	2.EB.20	FeAsS
Group 3 - Halides
ⓘ	Connellite	3.DA.25	Cu₁₉(SO₄)(OH)₃₂Cl₄ · 3H₂O
Group 4 - Oxides and Hydroxides
ⓘ	Goethite	4.00.	Fe³⁺O(OH)
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	var. Specularite	4.CB.05	Fe₂O₃
ⓘ	Quartz var. Amethyst	4.DA.05	SiO₂
ⓘ	var. Chalcedony	4.DA.05	SiO₂
ⓘ		4.DA.05	SiO₂
ⓘ	var. Smoky Quartz	4.DA.05	SiO₂
ⓘ	Cassiterite	4.DB.05	SnO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Siderite	5.AB.05	FeCO₃
ⓘ	Dolomite	5.AB.10	CaMg(CO₃)₂
ⓘ	Malachite	5.BA.10	Cu₂(CO₃)(OH)₂
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Brochantite	7.BB.25	Cu₄(SO₄)(OH)₆
ⓘ	Langite	7.DD.10	Cu₄(SO₄)(OH)₆ · 2H₂O
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite var. Carbonate-rich Fluorapatite	8.BN.05	Ca₅(PO₄,CO₃)₃(F,O)
ⓘ		8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Beryl	9.CJ.05	Be₃Al₂(Si₆O₁₈)
Unclassified
ⓘ	'K Feldspar var. Adularia'	-	KAlSi₃O₈
ⓘ	'Chlorite Group'	-
ⓘ	'Limonite'	-
ⓘ	'Tourmaline'	-	AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z
ⓘ	'Mica Group'	-
ⓘ	'Hornblende Root Name Group'	-	◻Ca₂(Z²⁺₄Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
ⓘ	'K Feldspar'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Brochantite	Cu₄(SO₄)(OH)₆
H	ⓘ Connellite	Cu₁₉(SO₄)(OH)₃₂Cl₄ · 3H₂O
H	ⓘ Goethite	Fe³⁺O(OH)
H	ⓘ Langite	Cu₄(SO₄)(OH)₆ · 2H₂O
H	ⓘ Malachite	Cu₂(CO₃)(OH)₂
H	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
Be	Beryllium
Be	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
B	Boron
B	ⓘ Tourmaline	AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Fluorapatite var. Carbonate-rich Fluorapatite	Ca₅(PO₄,CO₃)₃(F,O)
C	ⓘ Dolomite	CaMg(CO₃)₂
C	ⓘ Malachite	Cu₂(CO₃)(OH)₂
C	ⓘ Siderite	FeCO₃
O	Oxygen
O	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
O	ⓘ Quartz var. Amethyst	SiO₂
O	ⓘ Brochantite	Cu₄(SO₄)(OH)₆
O	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
O	ⓘ Calcite	CaCO₃
O	ⓘ Fluorapatite var. Carbonate-rich Fluorapatite	Ca₅(PO₄,CO₃)₃(F,O)
O	ⓘ Cassiterite	SnO₂
O	ⓘ Quartz var. Chalcedony	SiO₂
O	ⓘ Connellite	Cu₁₉(SO₄)(OH)₃₂Cl₄ · 3H₂O
O	ⓘ Dolomite	CaMg(CO₃)₂
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Goethite	Fe³⁺O(OH)
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Langite	Cu₄(SO₄)(OH)₆ · 2H₂O
O	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Siderite	FeCO₃
O	ⓘ Quartz var. Smoky Quartz	SiO₂
O	ⓘ Tourmaline	AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z
O	ⓘ Hematite var. Specularite	Fe₂O₃
O	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
F	Fluorine
F	ⓘ Fluorapatite var. Carbonate-rich Fluorapatite	Ca₅(PO₄,CO₃)₃(F,O)
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
F	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
Mg	Magnesium
Mg	ⓘ Dolomite	CaMg(CO₃)₂
Al	Aluminium
Al	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
Al	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Al	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
Si	Silicon
Si	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
Si	ⓘ Quartz var. Amethyst	SiO₂
Si	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Si	ⓘ Quartz var. Chalcedony	SiO₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Quartz var. Smoky Quartz	SiO₂
Si	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
P	Phosphorus
P	ⓘ Fluorapatite var. Carbonate-rich Fluorapatite	Ca₅(PO₄,CO₃)₃(F,O)
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
S	Sulfur
S	ⓘ Arsenopyrite	FeAsS
S	ⓘ Brochantite	Cu₄(SO₄)(OH)₆
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Chalcocite	Cu₂S
S	ⓘ Connellite	Cu₁₉(SO₄)(OH)₃₂Cl₄ · 3H₂O
S	ⓘ Langite	Cu₄(SO₄)(OH)₆ · 2H₂O
S	ⓘ Pyrite	FeS₂
Cl	Chlorine
Cl	ⓘ Connellite	Cu₁₉(SO₄)(OH)₃₂Cl₄ · 3H₂O
Cl	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
K	Potassium
K	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Fluorapatite var. Carbonate-rich Fluorapatite	Ca₅(PO₄,CO₃)₃(F,O)
Ca	ⓘ Dolomite	CaMg(CO₃)₂
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Hornblende Root Name Group	◻Ca₂(Z₄²⁺Z³⁺)(AlSi₇O₂₂)(OH,F,Cl)₂
Fe	Iron
Fe	ⓘ Arsenopyrite	FeAsS
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Goethite	Fe³⁺O(OH)
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Siderite	FeCO₃
Fe	ⓘ Hematite var. Specularite	Fe₂O₃
Cu	Copper
Cu	ⓘ Brochantite	Cu₄(SO₄)(OH)₆
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Chalcocite	Cu₂S
Cu	ⓘ Connellite	Cu₁₉(SO₄)(OH)₃₂Cl₄ · 3H₂O
Cu	ⓘ Langite	Cu₄(SO₄)(OH)₆ · 2H₂O
Cu	ⓘ Malachite	Cu₂(CO₃)(OH)₂
As	Arsenic
As	ⓘ Arsenopyrite	FeAsS
Sn	Tin
Sn	ⓘ Cassiterite	SnO₂

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

Rheno-Hercynian BeltOrogenic Belt

England
- Cornwall
  - St Just Mining DistrictMining District
  - ⭔St Just Mining RegionRegion
- Devon and Cornwall metalliferous mining districtMining District

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