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I was wrong in my previous post. THere is a small reference on page 91 (old edition) of "The Copper Mines of Snowdonia".
posted by Chris Andrews on 06/11/2006
Years ago I was told about an arsenic mine above Gerlan, but directions were vague. However for years on walks, I would pass these works above Tan y Garth farm. They are totally different to the slate trials and works that are to be found in the surrounding area. I could never find any obvious minerals in the spoil as is the case across the valley at Ceunant and Gwaith. I don’t think there is a reference in Bick’s copper mines of Snowdonia. Recently I came across a reference in a DTI/ BGS publication (Exploration for metaliferous and related minerals in Britain) which states “small amounts of arsenopyrites were mined from Cambrian sandstones in the Tan y Garth mine near Bethesda (Dewey 1920)”. Does anyone have any other information?
posted by Chris Andrews on 31/10/2006
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