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Sheshodonnell East Mine, Carron, The Burren, Co. Clare, Ireland

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Latitude & Longitude (WGS84): 53° 1' 5'' North , 9° 5' 25'' West
Latitude & Longitude (decimal): 53.01806,-9.09028
GeoHash:G#: gc3t95sst
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate


Irish grid ref: R269971

Situated in the midst of one of Europe's best examples of limestone karst scenery, this tiny, Victorian lead mine hosts the most remarkable deposit of smithsonite in the British Isles. Amazingly the sphalerite vein has been completely altered to green, yellow, grey and white botryoidal smithsonite!
Worked on a very small scale from about 1862-1863 a vein varying from about 30-45cm in width was worked by a shallow trench over a distance of about 100m.
All of the smithsonite was originally left in the spoil as a gangue mineral and Russell (1917) states that 3 or 4 tonnes of smithsonite was visible on the spoil! Sadly virtually none remains today as most has been bulldozed down the shaft and whatever scraps were left have been long ago collected...
The colour is due to a little cadmium sulphide (averaging 0.57% Cd).
Little more than a tiny badly weathered spoil heap remains today - nothing remotely comparable to its heyday!



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.

Shelshodonnel east mine, CO Clare, Ireland

Regions containing this locality

Ireland (island)

Island - 484 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


14 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Reference: Dr Richard Unitt Collection
Calcite
Formula: CaCO3
Description: Occasionally found as massive material associated with limestone bedrock. Rare specimens of large nail-head crystals (4cm+) coated in smithsonite have been found albeit severely weathered.
Reference: Dr Richard Unitt (personal observation) Barry Flannery (personal collection)
Cerussite
Formula: PbCO3
Habit: Prismatic
Colour: Colourless, white
Fluorescence: Pale yellow
Description: Found on oxidising galena specimens.
Reference: Barry Flannery Collection
Chalcopyrite
Formula: CuFeS2
Description: Generally found disseminated through fluorite. Rarely found unoxidised.
Reference: Dr Richard Unitt (personal observation)
Fluorite
Formula: CaF2
Habit: Cubic
Colour: Colourless, orange, lilac, to deep purple
Description: Extremely common throughout the spoil as it accounted for a large portion of the lode. The majority of smithsonite is found cementing heavily fractured fluorite together. Purple cubic crystals are often coated with mammilated smithsonite. Very rarely purple cubes can be found associated with limestone matrices.
Reference: Barry Flannery Collection
Galena
Formula: PbS
Habit: Massive
Colour: Metallic grey
Description: Usually found attached to Fluorite and is usually massive although certain specimens on limestone show what would have been (i.e. before weathering) decent octahedral crystals up to 2cm.
Reference: Barry Flannery collection
Greenockite
Formula: CdS
Reference: O’RAGHALLAIGH, C., FEELY, M., McARDLE, P., MacDERMOT, C., GEOGHEGAN, M. & KEARY, R. (1997). Mineral Localities in the Galway Bay Area. Geological Survey of Ireland, Report Series, RS97/1 (Mineral Resources).
Hydrozincite
Formula: Zn5(CO3)2(OH)6
Colour: White
Reference: Barry Flannery collection
Malachite
Formula: Cu2(CO3)(OH)2
Colour: Green
Description: Rarely found as coatings on oxidised chalcopyrite.
Reference: Dr Richard Unitt (personal observation)
Otavite
Formula: CdCO3
Habit: Skeletal crystals
Colour: White
Fluorescence: Pink
Description: Microscopic white otavite crystals are found on smithsonite containing high amounts of cadmium.
Reference: Dr. David Green
Quartz
Formula: SiO2
Habit: Prismatic
Colour: Clear
Description: Very rarely specimen found in conjuction with crystallized deep purple fluorite or fluorotized limestone.
Reference: Barry Flannery collection
Rosasite
Formula: (Cu,Zn)2(CO3)(OH)2
Reference: No reference listed
Smithsonite
Formula: ZnCO3
Habit: Botryoidal, Tetrahedral.
Colour: Yellow,Orange to Green
Description: Very difficult to find nowadays, several specimens in the Barry Flannery Collection show distinct tetrahedra albeit slightly rounded. Mammilations and botryoids are by far the most common although some botryoids/mammilations show tetrahedra under magnification and even microscopic spheres...
Reference: UKJMM Vol.29 p.12; Barry Flannery Collection
Sphalerite
Formula: ZnS
Description: Extremeely rare at site as the vast majority of sphalerite has been oxidised to smithsonite.
Reference: O’RAGHALLAIGH, C., FEELY, M., McARDLE, P., MacDERMOT, C., GEOGHEGAN, M. & KEARY, R. (1997). Mineral Localities in the Galway Bay Area. Geological Survey of Ireland, Report Series, RS97/1 (Mineral Resources).

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Chalcopyrite'2.CB.10aCuFeS2
'Galena'2.CD.10PbS
'Greenockite'2.CB.45CdS
'Sphalerite'2.CB.05aZnS
Group 3 - Halides
'Fluorite'3.AB.25CaF2
Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
'Cerussite'5.AB.15PbCO3
'Hydrozincite'5.BA.15Zn5(CO3)2(OH)6
'Malachite'5.BA.10Cu2(CO3)(OH)2
'Otavite'5.AB.05CdCO3
'Rosasite'5.BA.10(Cu,Zn)2(CO3)(OH)2
'Smithsonite'5.AB.05ZnCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Anglesite'7.AD.35PbSO4

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Greenockite2.8.7.2CdS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Cerussite14.1.3.4PbCO3
Otavite14.1.1.7CdCO3
Smithsonite14.1.1.6ZnCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Rosasite16a.3.1.2(Cu,Zn)2(CO3)(OH)2
Hydrozincite16a.4.1.1Zn5(CO3)2(OH)6
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

HHydrogen
H HydrozinciteZn5(CO3)2(OH)6
H MalachiteCu2(CO3)(OH)2
H Rosasite(Cu,Zn)2(CO3)(OH)2
CCarbon
C CalciteCaCO3
C CerussitePbCO3
C HydrozinciteZn5(CO3)2(OH)6
C MalachiteCu2(CO3)(OH)2
C OtaviteCdCO3
C Rosasite(Cu,Zn)2(CO3)(OH)2
C SmithsoniteZnCO3
OOxygen
O AnglesitePbSO4
O CalciteCaCO3
O CerussitePbCO3
O HydrozinciteZn5(CO3)2(OH)6
O MalachiteCu2(CO3)(OH)2
O OtaviteCdCO3
O QuartzSiO2
O Rosasite(Cu,Zn)2(CO3)(OH)2
O SmithsoniteZnCO3
FFluorine
F FluoriteCaF2
SiSilicon
Si QuartzSiO2
SSulfur
S AnglesitePbSO4
S ChalcopyriteCuFeS2
S GalenaPbS
S GreenockiteCdS
S SphaleriteZnS
CaCalcium
Ca CalciteCaCO3
Ca FluoriteCaF2
FeIron
Fe ChalcopyriteCuFeS2
CuCopper
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
Cu Rosasite(Cu,Zn)2(CO3)(OH)2
ZnZinc
Zn HydrozinciteZn5(CO3)2(OH)6
Zn Rosasite(Cu,Zn)2(CO3)(OH)2
Zn SmithsoniteZnCO3
Zn SphaleriteZnS
CdCadmium
Cd GreenockiteCdS
Cd OtaviteCdCO3
PbLead
Pb AnglesitePbSO4
Pb CerussitePbCO3
Pb GalenaPbS

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

Early Carboniferous
323.2 - 358.9 Ma



ID: 3143524
Dinantian

Age: Mississippian (323.2 - 358.9 Ma)

Lithology: Major:{limestone}, Minor{claystone,sandstone}

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]

Early Carboniferous
323.2 - 358.9 Ma



ID: 3192030
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]

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)
Report on the Burren Mines, Castletown, Corofin, Co. Clare - Sir Arthur Russell 1917


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