With Trebisken Green. Iron mine situated on the Perran Iron Lode, initially exploited through opencast operations in two pits: a smaller one to the west and a larger one to the east, spaced about 70 yards apart. The eastern pit, measuring 200 ft in length, up to 80 ft in width, and 100 ft in depth, exposed massive grey siderite ore in two large chambers at its bottom, with some scattered specks of sulphides. An adit, wide enough to accommodate standard railway wagons, was driven from a point 300 yards NNE of the eastern pit to access the lode at greater depths, connecting to the pit through an ore-pass winze.

Drives were extended from the adit below the pit, with crosscuts intersecting the lode position, although no stoping is indicated, suggesting that the anticipated rich orebodies were not encountered. Additionally, two old shafts located NE and NNE of the pit, thought to be on the southern extension of Trebisken Lode, were connected to the adit. Some lead and silver ores were sold when the mine operated under the name Mount and Trebisken Mine. Mount Mine was reopened unsuccessfully in 1916 and later explored for iron ore during World War II, with an inclined shaft sunk east of the eastern pit.

The mine’s production history includes periods under various names: Trebisken and Mount from 1858 to 1877, Mount Mine in 1871, 1873, 1880, 1905, and 1907, and as Perran Iron Mine in 1866. Under the New Perran Iron Company, it recorded production of iron ore and manganese ore in 1878. The site is marked by the Engine Shaft, with the engine house’s chimney still standing in a field south of the eastern pit, which is now filled in and overgrown.

1850s 1871-1880 1939-1940s

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