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Castell Carn Dochan, Llanuwchilyn, Dolgellau Gold Belt, Gwynedd (Merionethshire), Wales, UK

Bismuthinite
Castell Carn Dochan, Llanuwchilyn, Dolgellau Gold Belt, Gwynedd, Wales, UK

Photo: Steve Rust
UK Grid Reference: SH850307
Latitude: 52°51'40"N
Longitude: 3°42'30"W
A small mine, and by far the most easterly mine within the Merioneth gold-mining area, being isolated over 6 miles to the east of the northerly group of mines that includes the well-known Gwynfnydd Mine.

Castell Carn Dochan was a relatively late discovery in the area, a company being formed in Manchester in 1863 to work the mine after gold was discovered here by a 12 year old boy, although many quartz boulders showing visible gold were scattered on the hillside.

Operations between 1864-66 produced 1508 ounces of gold from 3158 tons of quartz, with fine specimens being found underground. However, yields declined by 1866, and the plant was sold in 1876 following a winding-up order.

Later revived, the mine worked on a small scale till 1905. Records show 12.5 ounces of gold from 50 tons of quartz in 1889, and 393 ounces of gold from 2638 tons of quartz between 1895-98. The deep adit, north-east of the mine from near the river, was completed about 1901.

Castell Carn Dochan was the 4th most productive of the Merioneth gold mines. Some lead was also produced.

ref. - The Gold Mines of Merioneth, G.W. Hall (undated)

Mineral List

Anatase
Anglesite
Ankerite
Arsenopyrite
Bismuthinite
'Chlorite Group'
Chrysocolla
Galena
Gold
Gypsum
Hemimorphite
Hydrozincite
Pyrite
Pyrrhotite
Quartz
Sphalerite


16 entries listed. 15 valid minerals.

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