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Great Onslow Consols (Great Michell Consols), St Breward, Cornwall, England, UKi
Regional Level Types
Great Onslow Consols (Great Michell Consols)Mine
St BrewardCivil Parish
CornwallCounty
EnglandConstituent Country
UKCountry

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Key
Latitude & Longitude (WGS84):
50° 34' 2'' North , 4° 41' 20'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SX096777
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Camelford2,335 (2017)6.1km
Delabole1,647 (2017)6.9km
Bodmin14,614 (2017)10.9km
Tintagel1,028 (2017)11.5km
Wadebridge6,599 (2017)11.8km


First worked as Great Michell Consols from 1848 until its abandonment in 1848. The set was then worked as Great Onslow Consols from 1851 till around 1870-1880 (HJ)

The mine is well known for the unique siderite crystals it produced.

During 1853-6 and 1860, the mine produced 935 tons of 3.5% copper ore, and from 1856-60, tons of pyrite (Dines)

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


8 valid minerals.

Detailed Mineral List:

Arsenopyrite
Formula: FeAsS
Chalcocite
Formula: Cu2S
'Chlorite Group'
Fluorite
Formula: CaF2
Pyrite
Formula: FeS2
Pyrrhotite
Formula: Fe7S8
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Quartz
Formula: SiO2
Siderite
Formula: FeCO3
Reference: Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
Sphalerite
Formula: ZnS

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Chalcocite2.BA.05Cu2S
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Siderite5.AB.05FeCO3
Unclassified Minerals, Rocks, etc.
'Chlorite Group'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Pyrite2.12.1.1FeS2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Siderite14.1.1.3FeCO3
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Chlorite Group'-

List of minerals for each chemical element

CCarbon
C SideriteFeCO3
OOxygen
O SideriteFeCO3
O QuartzSiO2
FFluorine
F FluoriteCaF2
SiSilicon
Si QuartzSiO2
SSulfur
S ChalcociteCu2S
S PyriteFeS2
S SphaleriteZnS
S ArsenopyriteFeAsS
S PyrrhotiteFe7S8
CaCalcium
Ca FluoriteCaF2
FeIron
Fe SideriteFeCO3
Fe PyriteFeS2
Fe ArsenopyriteFeAsS
Fe PyrrhotiteFe7S8
CuCopper
Cu ChalcociteCu2S
ZnZinc
Zn SphaleriteZnS
AsArsenic
As ArsenopyriteFeAsS

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
H G Dines, The Metalliferous Mining Region of South-West England Vol 2, p579.
A K Hamilton Jenkins, Mines & Miners of Cornwall, Vol XVI, pp 10-12

Other Regions, Features and Areas containing this locality

British IslesGroup of Islands
Eurasian PlateTectonic Plate
EuropeContinent
UK

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