Hafotty Mine, Dyffryn Ardudwy, Gwynedd, Wales, UKi
| Regional Level Types | |
|---|---|
| Hafotty Mine | Mine (Abandoned) |
| Dyffryn Ardudwy | Community |
| Gwynedd | County |
| Wales | Country |
| UK | Country |
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Latitude & Longitude (WGS84):
52° 44' 41'' North , 4° 3' 2'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SH617183
Type:
Mine (Abandoned) - last checked 2024
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Barmouth | 2,315 (2017) | 2.4km |
| Dyffryn Ardudwy | 1,654 (2012) | 3.7km |
| Tal-y-bont | 1,540 (2017) | 4.3km |
| Fairbourne | 721 (2017) | 5.4km |
| Llanbedr | 385 (2017) | 8.6km |
Mindat Locality ID:
38426
Long-form identifier:
mindat:1:2:38426:0
GUID (UUID V4):
900fe7fd-169f-46c0-8ea6-3b6b6a72cf7d
Other/historical names associated with this locality:
Merionethshire
Manganese-bearing shales overlain by coarse-grained greywacke, at the base of a grey siltstone layer (Hafotty formation). The mine was worked prior to 1928, producing 44,000 tons of manganese ore.
The ore-bed is thinly laminated and superficially stained with a purplish brown residue from the weathering of the manganese minerals. It consists mainly of spessartine with some rhodochrosite, quartz albite and chlorite. It may have formed as a gel at the water/sediment interface in a shallow marine basin, initially as rhodochrosite, but was regionally metamorphosed to spessartine.
Ref.: P.M. Allen, A.A. Jackson: Geological Excursions in the Harlech Dome, BGS, 1985
One of five continuous manganese mines that worked the outcrop for three miles north of Barmouth, and the largest of the Merioneth manganese mines according to recorded output.
Ref.:
The manganese Mines of North Wales, G. C. Down, British Mining No. 14 (A monograph of the Northern Mines Research Group)1980.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
4 valid minerals.
Detailed Mineral List:
| β Albite Formula: Na(AlSi3O8) |
| β 'Chlorite Group' |
| β Quartz Formula: SiO2 |
| β Rhodochrosite Formula: MnCO3 |
| β Spessartine Formula: Mn2+3Al2(SiO4)3 |
| β 'Wad' |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| β | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Rhodochrosite | 5.AB.05 | MnCO3 |
| Group 9 - Silicates | |||
| β | Spessartine | 9.AD.25 | Mn2+3Al2(SiO4)3 |
| β | Albite | 9.FA.35 | Na(AlSi3O8) |
| Unclassified | |||
| β | 'Chlorite Group' | - | |
| β | 'Wad' | - | |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | β Rhodochrosite | MnCO3 |
| O | Oxygen | |
| O | β Albite | Na(AlSi3O8) |
| O | β Quartz | SiO2 |
| O | β Rhodochrosite | MnCO3 |
| O | β Spessartine | Mn32+Al2(SiO4)3 |
| Na | Sodium | |
| Na | β Albite | Na(AlSi3O8) |
| Al | Aluminium | |
| Al | β Albite | Na(AlSi3O8) |
| Al | β Spessartine | Mn32+Al2(SiO4)3 |
| Si | Silicon | |
| Si | β Albite | Na(AlSi3O8) |
| Si | β Quartz | SiO2 |
| Si | β Spessartine | Mn32+Al2(SiO4)3 |
| Mn | Manganese | |
| Mn | β Rhodochrosite | MnCO3 |
| Mn | β Spessartine | Mn32+Al2(SiO4)3 |
Other Regions, Features and Areas containing this locality
British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
EuropeContinent
UK
- Wales
- Cambrian MountainsMountain Range
- Snowdonia National ParkNational Park
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