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Cwmheisian East Mine, Ganllwyd, Gwynedd, Wales, UKi
| Regional Level Types | |
|---|---|
| Cwmheisian East Mine | Mine |
| Ganllwyd | Community |
| Gwynedd | County |
| Wales | Country |
| UK | Country |
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Latitude & Longitude (WGS84):
52° 50' 10'' North , 3° 52' 9'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SH741282
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Trawsfynydd | 628 (2017) | 8.2km |
| Dolgellau | 2,688 (2017) | 10.5km |
| Llan Ffestiniog | 864 (2017) | 14.1km |
| Dyffryn Ardudwy | 1,654 (2012) | 14.7km |
| Llanbedr | 385 (2017) | 15.7km |
Other/historical names associated with this locality:
Merionethshire
Although jointly worked, the Cwmhesian mines are not a single set of workings, the east and west mines being about 1000 yards apart.
Initially and primarily a lead mine, Cwmheisian East Mine was active in the early 1840s and was the location for A. Dean's discovery of gold in the district. It worked intermittently until the 1890s.
Recorded production (which presumable includes that from the west mine) was 350 tones of gold ore producing 188 ounces of gold, the majority, 176 ounces, being produced before the end of 1864.
refs:
Goldmining in Western Merioneth, T. A. Morrison (undated)
The Gold Mines of Merioneth, G.W. Hall (undated)
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Galena Formula: PbS |
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Regions, Features and Areas containing this locality
British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
- AvaloniaVolcanic Arc
EuropeContinent
UK
- Wales
- Cambrian MountainsMountain Range
- Gwynedd
- Snowdonia National ParkNational Park
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