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Wheal Maid Decline, St Day, Gwennap, Cornwall, England, UKi
Regional Level Types
Wheal Maid DeclineMine
St DayVillage
GwennapCivil Parish
CornwallCounty
EnglandConstituent Country
UKCountry

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Latitude & Longitude (WGS84):
50° 14' 10'' North , 5° 10' 2'' West
Latitude & Longitude (decimal):
50.23619,-5.16726
GeoHash:
G#: gbumf3jqf
GRN:
N34W03
Type:
Mine
KΓΆppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
St. Day700 (2011)1.4km
Chacewater1,226 (2017)2.4km
Redruth42,690 (2017)4.1km
Perranwell1,207 (2017)4.2km
Ponsanooth967 (2017)4.5km
Mindat Locality ID:
38627
Long-form identifier:
mindat:1:2:38627:7
GUID (UUID V4):
234d86d6-6373-45c1-a160-2b8f63286611


In 1983, Carnon Consolidated Tin Mines Ltd. started to explore the area of the old Consols and United Mines workings.

A decline shaft (not an adit) was driven, cutting three mineralised veins on a distance of 655 metres.

This project was called the Wheal Maid Decline, despite it lying to the south of the old Wheal Maid mine and did not intersect any of the workings of Wheal Maid

This decline, extends in a south-south-easterly direction before taking a sharp turn to the north-north-west.

It was abandoned in 1985 following the collapse in the price of tin.

In a depth of roughly 100 metres, some levels of the old 'Whiteworks section' were cut, from where a number of interesting minerals was recovered.

The Whiteworks shaft was fitted out to be used as an emergency egress route from the decline.

Waste rock from the driving of the decline was dumped to the west of Taylors engine house of Great Consolidated Mines (Consols).

With diligent searching it is still possible to find respectable minerals specimens on these dumps.

Edited by Dale Foster

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


11 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

Detailed Mineral List:

β“˜ Cassiterite
Formula: SnO2
β“˜ Ceruleite
Formula: Cu2Al7(AsO4)4(OH)13 · 11.5H2O
β“˜ Chalcocite
Formula: Cu2S
β“˜ Emplectite
Formula: CuBiS2
Description: SEM-EDS Lapis 2019.
β“˜ 'Mica Group'
β“˜ Olivenite
Formula: Cu2(AsO4)(OH)
β“˜ Pyrargyrite
Formula: Ag3SbS3
β“˜ Quartz
Formula: SiO2
β“˜ Scorodite
Formula: Fe3+AsO4 · 2H2O
β“˜ Silver
Formula: Ag
β“˜ Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
β“˜ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
β“˜ Varlamoffite
Formula: (Sn,Fe)(O,OH)2

Gallery:

SnO2β“˜ Cassiterite
Cu2Al7(AsO4)4(OH)13 · 11.5H2Oβ“˜ Ceruleite
Fe3+AsO4 · 2H2Oβ“˜ Scorodite

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
β“˜Chalcocite2.BA.05Cu2S
β“˜Pyrargyrite2.GA.05Ag3SbS3
β“˜Emplectite2.HA.05CuBiS2
Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
β“˜Cassiterite4.DB.05SnO2
β“˜Varlamoffite4.DB.05(Sn,Fe)(O,OH)2
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Olivenite8.BB.30Cu2(AsO4)(OH)
β“˜Scorodite8.CD.10Fe3+AsO4 Β· 2H2O
β“˜Ceruleite8.DE.25Cu2Al7(AsO4)4(OH)13 Β· 11.5H2O
β“˜Torbernite8.EB.05Cu(UO2)2(PO4)2 Β· 12H2O
Unclassified
β“˜'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
β“˜'Mica Group'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ CeruleiteCu2Al7(AsO4)4(OH)13 · 11.5H2O
Hβ“˜ OliveniteCu2(AsO4)(OH)
Hβ“˜ ScoroditeFe3+AsO4 · 2H2O
Hβ“˜ TorberniteCu(UO2)2(PO4)2 · 12H2O
Hβ“˜ Varlamoffite(Sn,Fe)(O,OH)2
BBoron
Bβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
OOxygen
Oβ“˜ CassiteriteSnO2
Oβ“˜ CeruleiteCu2Al7(AsO4)4(OH)13 · 11.5H2O
Oβ“˜ OliveniteCu2(AsO4)(OH)
Oβ“˜ QuartzSiO2
Oβ“˜ ScoroditeFe3+AsO4 · 2H2O
Oβ“˜ TorberniteCu(UO2)2(PO4)2 · 12H2O
Oβ“˜ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oβ“˜ Varlamoffite(Sn,Fe)(O,OH)2
AlAluminium
Alβ“˜ CeruleiteCu2Al7(AsO4)4(OH)13 · 11.5H2O
SiSilicon
Siβ“˜ QuartzSiO2
PPhosphorus
Pβ“˜ TorberniteCu(UO2)2(PO4)2 · 12H2O
SSulfur
Sβ“˜ ChalcociteCu2S
Sβ“˜ EmplectiteCuBiS2
Sβ“˜ PyrargyriteAg3SbS3
FeIron
Feβ“˜ ScoroditeFe3+AsO4 · 2H2O
Feβ“˜ Varlamoffite(Sn,Fe)(O,OH)2
CuCopper
Cuβ“˜ CeruleiteCu2Al7(AsO4)4(OH)13 · 11.5H2O
Cuβ“˜ ChalcociteCu2S
Cuβ“˜ EmplectiteCuBiS2
Cuβ“˜ OliveniteCu2(AsO4)(OH)
Cuβ“˜ TorberniteCu(UO2)2(PO4)2 · 12H2O
AsArsenic
Asβ“˜ CeruleiteCu2Al7(AsO4)4(OH)13 · 11.5H2O
Asβ“˜ OliveniteCu2(AsO4)(OH)
Asβ“˜ ScoroditeFe3+AsO4 · 2H2O
AgSilver
Agβ“˜ PyrargyriteAg3SbS3
Agβ“˜ SilverAg
SnTin
Snβ“˜ CassiteriteSnO2
Snβ“˜ Varlamoffite(Sn,Fe)(O,OH)2
SbAntimony
Sbβ“˜ PyrargyriteAg3SbS3
BiBismuth
Biβ“˜ EmplectiteCuBiS2
UUranium
Uβ“˜ TorberniteCu(UO2)2(PO4)2 · 12H2O

Geochronology

Geologic TimeRocks, Minerals and Events
Phanerozoic
 Paleozoic
  Permian
   Guadalupian
β“˜ Major polymetallic mineralization~270 MaCornwall, England, UK
   Cisuralian
β“˜ Porphyry dikes intruded (latest age)~275 MaCornwall, England, UK
β“˜ Greisenization (latest age)~280 MaCornwall, England, UK
β“˜ Porphyry dikes intruded (earliest age)~280 MaCornwall, England, UK
β“˜ Formation of metallized pegmatites~285 MaCornwall, England, UK
β“˜ Greisenization (earliest age)~285 MaCornwall, England, UK
β“˜ Emplacement of major plutons~295 MaCornwall, England, UK

Other Regions, Features and Areas containing this locality

British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
EuropeContinent
UK

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

Lapis 11(2), 38 (1986)
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