Great Retallack was a mine on the Great Perran Iron Lode, east of Treamble. The research records iron, zinc, lead and silver output, with production returns spanning 1858–80.
That range of products helps explain why the word “iron” in the lode’s name is not the whole story. A mineral belt could contain several commercially interesting ores, and their value changed with demand, prices and the cost of extraction and transport.
Great Retallack belongs to a chain of separate workings that included Mount, Treamble and Duchy Peru. The connected map should show that relationship without implying a single owner or a continuous underground passage between every site. North Retallack is separately identified; similar names need the same care here as the several Wheal Roses around Newquay.
Where it is
Great Retallack Mine
50.361421, -5.107618 · Position source: https://webapps.bgs.ac.uk/memoirs/docs/B01793.html
Historic mine locality from the Geological Survey grid [SW 79070 55898]; not a surveyed shaft or visitor entrance
Visiting and access
A location reference, not confirmation of public access or a visitor entrance.
Sources
Source: https://www.mindat.org/loc-1116.html Source: https://webapps.bgs.ac.uk/memoirs/docs/B01793.html