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Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK

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Latitude & Longitude (WGS84): 50° 23' 17'' North , 4° 48' 14'' West
Latitude & Longitude (decimal): 50.38833,-4.80389
GeoHash:G#: gbuwdsvvm
UK National Grid Reference:SX007581
Locality type:Pit
Köppen climate type:Cfb : Temperate oceanic climate


A large and now abandoned china clay pit lying to the west of Bugle village and bounded on the southern side by the road between Roche and Stenalees.

As the pit expanded in the 20th century it encompassed a number of smaller china clay works including Old Beam clay works, Imperial Goonbarrow, East Goonbarrow, West Goonbarrow, North Goonbarrow, Caudledown, Cleaves, South Caudledown and Rock Hill clay works.

The pit also encompasses several zones of tin (and tungsten) mineralisation, with the tin being exploited by mines that largely pre-dated the china clay operations. Probably the most well known of these older tin mines was Old Beam Mine.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Goonbarrow Pit, St Austell District, Cornwall, England, UK

Regions containing this locality

Devon and Cornwall metalliferous mining district, England, UK

District - 752 mineral species & varietal names listed

St Austell Mining District, Cornwall, England, UK

Mining District - 250 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

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


Mineral List


12 valid minerals.

Detailed Mineral List:

Aheylite ?
Formula: (Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
'Apatite'
Beryl
Formula: Be3Al2(Si6O18)
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Cassiterite
Formula: SnO2
Reference: Dale Foster Collection
'commodity:Clay'
Reference: From USGS MRDS database
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Fluorite
Formula: CaF2
'commodity:Kaolin (China Clay)'
Reference: From USGS MRDS database
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: Bray, Colin J.; Spooner, Edward T. C. (1983): Sheeted vein tin-tungsten mineralization and greisenization associated with economic kaolinization, Goonbarrow china clay pit, St. Austell, Cornwall, England: geologic relationships and geochronology. Economic Geology 78, 1064-1089.; http://www.genuki.org.uk/big/eng/Cornwall/Treverbyn/
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Paul De Bondt collection
Muscovite var: Pig's Egg
Formula: KAl2(AlSi3O10)(OH)2
Reference: Paul De Bondt collection
Orthoclase
Formula: K(AlSi3O8)
Reference: Paul De Bondt
Quartz
Formula: SiO2
Reference: [Golley & Williams, 1995 - "Cornish Mineral Reference Manual", 51]
Quartz var: Amethyst
Formula: SiO2
Reference: [Golley & Williams, 1995 - "Cornish Mineral Reference Manual", 51]
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Paul De Bondt
Sphalerite
Formula: ZnS
Reference: Dale Foster Collection
Stannite
Formula: Cu2FeSnS4
Reference: Dale Foster Collection
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Bray, Colin J.; Spooner, Edward T. C. (1983): Sheeted vein tin-tungsten mineralization and greisenization associated with economic kaolinization, Goonbarrow china clay pit, St. Austell, Cornwall, England: geologic relationships and geochronology. Economic Geology 78, 1064-1089.
'Tourmaline var: Achroite'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: [Golley & Williams, 1995 - "Cornish Mineral Reference Manual" 1]
'Wolframite'
Formula: (Fe2+)WO4 to (Mn2+)WO4
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Sphalerite2.CB.05aZnS
Stannite2.CB.15aCu2FeSnS4
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
'Aheylite' ?8.DD.15(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
Beryl9.CJ.05Be3Al2(Si6O18)
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Pig's Egg9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase9.FA.30K(AlSi3O8)
Topaz9.AF.35Al2(SiO4)(F,OH)2
Unclassified Minerals, Rocks, etc.
Apatite-
Tourmaline-A(D3)G6(T6O18)(BO3)3X3Z
'var: Achroite'-A(D3)G6(T6O18)(BO3)3X3Z
Wolframite-(Fe2+)WO4 to (Mn2+)WO4

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Stannite2.9.2.1Cu2FeSnS4
Group 4 - SIMPLE OXIDES
AX2
Cassiterite4.4.1.5SnO2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)7(XO4)4Zq·xH2O
Aheylite ?42.9.3.5(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
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.
'Apatite'-
Kaolinite-Al2(Si2O5)(OH)4
Muscovite
var: Pig's Egg
-KAl2(AlSi3O10)(OH)2
Quartz
var: Amethyst
-SiO2
var: Smoky Quartz-SiO2
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
'var: Achroite'-A(D3)G6(T6O18)(BO3)3X3Z
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals for each chemical element

HHydrogen
H Aheylite(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
H KaoliniteAl2(Si2O5)(OH)4
H MuscoviteKAl2(AlSi3O10)(OH)2
H Muscovite (var: Pig's Egg)KAl2(AlSi3O10)(OH)2
H TopazAl2(SiO4)(F,OH)2
BeBeryllium
Be BerylBe3Al2(Si6O18)
BBoron
B Tourmaline (var: Achroite)A(D3)G6(T6O18)(BO3)3X3Z
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
OOxygen
O Tourmaline (var: Achroite)A(D3)G6(T6O18)(BO3)3X3Z
O Aheylite(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
O Quartz (var: Amethyst)SiO2
O BerylBe3Al2(Si6O18)
O CassiteriteSnO2
O FluorapatiteCa5(PO4)3F
O KaoliniteAl2(Si2O5)(OH)4
O MuscoviteKAl2(AlSi3O10)(OH)2
O OrthoclaseK(AlSi3O8)
O Muscovite (var: Pig's Egg)KAl2(AlSi3O10)(OH)2
O QuartzSiO2
O Quartz (var: Smoky Quartz)SiO2
O TopazAl2(SiO4)(F,OH)2
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
FFluorine
F FluorapatiteCa5(PO4)3F
F FluoriteCaF2
F TopazAl2(SiO4)(F,OH)2
AlAluminium
Al Aheylite(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
Al BerylBe3Al2(Si6O18)
Al KaoliniteAl2(Si2O5)(OH)4
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
Al Muscovite (var: Pig's Egg)KAl2(AlSi3O10)(OH)2
Al TopazAl2(SiO4)(F,OH)2
SiSilicon
Si Quartz (var: Amethyst)SiO2
Si BerylBe3Al2(Si6O18)
Si KaoliniteAl2(Si2O5)(OH)4
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si OrthoclaseK(AlSi3O8)
Si Muscovite (var: Pig's Egg)KAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si Quartz (var: Smoky Quartz)SiO2
Si TopazAl2(SiO4)(F,OH)2
PPhosphorus
P Aheylite(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
P FluorapatiteCa5(PO4)3F
SSulfur
S SphaleriteZnS
S StanniteCu2FeSnS4
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
K Muscovite (var: Pig's Egg)KAl2(AlSi3O10)(OH)2
CaCalcium
Ca FluorapatiteCa5(PO4)3F
Ca FluoriteCaF2
MnManganese
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
FeIron
Fe Aheylite(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O
Fe StanniteCu2FeSnS4
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
CuCopper
Cu StanniteCu2FeSnS4
ZnZinc
Zn SphaleriteZnS
SnTin
Sn CassiteriteSnO2
Sn StanniteCu2FeSnS4
WTungsten
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: 2027014
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]

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]

Ordovician
443.8 - 485.4 Ma



ID: 3150224
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

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
- Bray, Colin J.; Spooner, Edward T. C. (1983): Sheeted vein tin-tungsten mineralization and greisenization associated with economic kaolinization, Goonbarrow china clay pit, St. Austell, Cornwall, England: geologic relationships and geochronology. Economic Geology 78, 1064-1089.


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