Llechwedd Helyg Mine (Willow Bank Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion (Dyfed; Cardiganshire), Wales, UK

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Llechwedd Helyg mine, developed a section of the Camdwr fault system, which is recorded as being up to 9 mts wide here. The mine was worked befor 1853, when it was reopened. The mine continued to be worked until 1862, with only 3 tons of lead ore being recorded for this 10 year period.
The mine produced some of mid-Wales best examples of malachite, for a short time from the dumps.

UK OS Grid Reference: SN683847
Map Reference: 52°26'38"N , 3°56'16"W

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Mineral List:

37 entries listed. 35 valid minerals.

Mineral Paragenesis:

early

late

Vein Supergene

Goethite

Chrysocolla

Malachite

Cerussite

Pyromorphite

Wulfenite

Dump Supergene 1

Covellite

Malachite

Brochantite

Schmiederite

Linarite

Cerussite

Langite

Dump supergene 2

Caledonite

Unnamed (Cu-Pb Silicate)

Susannite

Mattheddleite

Unnamed (Pb Silicate)

Elyite

Hydrocerussite

Dump Supergene 3

Covellite

Anglesite

Cerussite

Caledonite

Susannite

Redgillite

Hydrocerussite

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